Daniel Gustafsson in Blade damage De-iced blades in ICING climates Icing also in ”warm” climateS Rotor blades the gearboxes of the future

1 Robust and proven technology for de-icing

Siemens has a long experience with wind turbines in cold climate areas. Welcome to

2015E-001A our booth where we will tell you more about our solutions.

siemens.se/vindkraft

ENERCON. Best performance at any site.

For the past 30 years, wind energy converters have been the benchmark for innovative technology and best quality products. Thanks to constant further development of all turbine components and the continuous improvement of our core competencies, new turbine generations with top technological features and intelligent grid technology will continue to evolve. In addition, cold climate sites with extreme climatic conditions require WEC technology to be fl exible. As an option, all ENERCON wind energy converters can be delivered as cold climate versions, meaning that the power curve at WEC operation is not affected at temperatures above -30°C, and they can be equipped with the well-proven and third party validated ENERCON rotor blade de-icing technology that has been deployed at many sites and offers operators/owners a considerable additional yield.

VISIT US AT THE WINTERWIND - BOOTH 34 www.enercon.de Editorial Content

t is with great pride that we welcome does this pose great demands on technol- 4 What’s up at this you to Åre. This is the eighth time that ogy and service, but it also affects the year’s Winterwind? we arrange Winterwind, THE confer- utilisation of capacity in such areas during Ience on wind power in cold climates. winter. Nonetheless, those areas have great 5 Why are we in Åre? potential, with regard to both wind condi- Just over 15 years ago , in October 2000, I tions and construction opportunities. 6 Daniel Gustafsson: participated in the spectacular inaugura- Wind power in Sweden tion of Anja, Vesta’s very first de-ic wind We aim to educate the industry and drive turbine, in Åre. Kallbygdens Ekonomiska developments forward, to facilitate the 8 How to detect Förening had invested in a V66 at roll-out in those areas. We will start by blade damage Gråsjön. We have seen major develop- listening to the exciting speakers who ments since then, and large wind farms have gathered here in Åre, and we hope 10 De-iced blades have been established in similar climates. that there will be many interesting meet- A must in icing climates ings and an open dialogue. We also hope Cold climate environments are challeng- that you will leave the conference with 13 Icing in warmer climates ing for many, no less so for wind power. new knowledge and expectations and full A constant identification of opportunities of renewable energy. and the development of technology and 14 Rotor blades The gearboxes of the future? innovations are keys to success. Yngve There are many reasons to feel optimistic Bergqvist, founder of the Icehotel in about the future. Jukkasjärvi, once said: “If you can build 16 Winterwind 2016 an hotel of snow and ice in a village 200 Jeanette Lindeblad The conference program kilometres above the Arctic Circle, which Chairman, Swedish Windpower Association strikes the world with amazement, noth- 20 Our exhibitors ing is impossible”. That may well be true. 23 This is Swedish In many parts of the world, the wind Windpower Association power industry has been hit by the eco- nomic crisis, just like all other industries – but the construction of wind turbines continues. Renewable energy is the future, and there will always be attrac- tive sites for it. Many of those sites are located in cold climate areas. Not only

Winterwind 2016 is organized by: Supportive partner: Art Direction: Spektra Cover Photo: Jonas Kullman Printed by: Grafika & Bildmakarn

Presenting partners:

3 Winterwind news

World Wind Energy Check-in your Question for 30 year Anniversary! Conference & Exhibition the final session! Every year World Wind Energy Associa- Swedish Windpower Association cel- tion, WWEA, invites in cooperation with Help us shape powerful questions for ebrates its 30-year anniversary, which local Wind Energy Associations, the the Ask & Share* session! we will celebrate in connection with Windpower Community from around the At the final session we will gather the Annual meeting in Kalmar 12-13 world to join the World Wind Energy May 2016 Windpower Manufacturers for question- . Conference. WWEC2016 takes place in ing. Take the opportunity to ask them a Tokyo, Japan. We will begin on 12 May with a study tour question - it can be something you are to Kårehamn offshore park hosted by E.on WWEC2017 in Sweden considering already or a matter that comes and in the evening we have an anniversary up during the conference days in Åre. Post dinner in Kalmar Salen. On May 13 we WWEC2017 will be held in Malmö, your question at the bulletin board, and Check it out at the final session! continue with an exhibition and confer- Sweden, with Swedish Windpower Keep an eye out for the check-in bulletin ence sessions on the theme; Wind Power Association as host. If you are interested board at Holiday Club. development in a 30 year perspective and in sponsor opportunities please contact focus on the future. *Safe and reliable operation in cold climate Ulla Hedman Andrén at conditions - today and in the future. 13.45- [email protected] We offer exhibitions stands 14.45 at Arena. and sponsor packages!

Get a discount if you book our packages during Winterwind. Wallmans show Job Corner You’ll find us at stand No 2, in the recep- Take the opportunity tion area. More info about the event and Expect the unexpected. Wallmans to present your booking on our website. Invitations will be aim to surprise, entertain and company and the job opportunities that sent out to our members! exceed your expectations! you offer, during Winterwind! As exhibi- Welcome to celebrate Swedish Windpow- tor or sponsor you have the possibility to er Associations 30 year's anniversary! The show’s stars, who will also be present your company at the Job Corner. your waiters, will be your personal You will reach both senior professionals guides on a journey through decades who are seeking for new challenges and of music, while you enjoy the flavors students. The Job Corner is located in the Let's Connect! of a well composed surprise menu. reception area at Holiday Club. Send your vacancies to info@svensk-vindkraft Linkedin, is where you stay in touch with Welcome to a sparkling night colleagues, clients and friends between for all senses! Note: Job ads must specify were/how to apply conferences. or a contact person incl. contact information, as we do not handle any documents at the booth. Facebook, here you’ll find photos from the conference, discussions and trivia. We support Gula Båtarna, Yellow boats winterwind.se, at our website you can download the presentations and sign up for We do not share any gifts to our present- the Winterwind newsletter. ers this year. Instead, we donate money to those who need it better, and this year the Instagram & Twitter, keep yourself updated money goes to the Yellow boats that save @WinterwindEvent lives on the Mediterranean. http://gulabatarna.se

4 Photo: Fredrik Thulin Why are we in Åre, at Winterwind 2016?

oreas I, held in Finland 1992, was unsealed opening. The Swedish Work phobic coatings are intriguing. While the the first scientific wind energy Environment Authority has indicated search for the holy grail continues, I've conference dealing with icing a possible, forthcoming requirement to yet to see a study that shows a function- Band low temperatures. We've keep a temperature of at least 20°C in ing, passive ice-repellent surface. In come a long way since and the industry the blades during maintenance and repair cold climates, the blades are exposed can now provide adapted technologies to work. While the industry might find this to accelerated erosion and falling ice master the environments in some of the requirement surprising, challenging and and consequently need to be optimised, most demanding locations in the world. even impossible to fulfil today, it ought to taking cold climate requirements into Wind Turbines have been deployed in be feasible in blades equipped with hot account. Thin shells in the vicinity of the deep frozen Antarctica, on the Alaskan air-based de-icing systems, where “only” leading edge are not ideal to withstand permafrost and as large-scale installa- power and airflow need to be limited. crushing forces, and heating foils make tions in Canada, the US and Scandinavia. repairs more difficult, if not impossible Working conditions for the staff servic- blades have grown in size during winter conditions. ing these wind turbines can be chal- lately, thanks to research and develop- lenging. In Alaska’s small turbines with ment in design and materials. A large Many cold climate challenges remain to lattice towers, the technician has a mere rotor diameter now enables a single, be solved. Together, here at Winterwind 15 seconds to fasten a bolt with one bare onshore wind turbine to produce in 2016, we'll have a chance to improve the hand before it gets too cold. He’d better excess of 10 GWh annually at capacity cost-efficient large-scale utilisation of not drop the glove before climbing down. factors from 35% and up. Active de-icing wind energy in cold climates. systems are readily available from many In Antarctica, tubular towers provide wind turbine manufacturers, and it's Göran Ronsten, Program coordinator shelter and facilitate access to the important to be aware of the capabilities Winterwind 2008–2016. On behalf of the and blades. Drifting snow enters every and limitations of these systems. Hydro- Swedish Wind Power Association

5 With a sense for ice In the doldrums. That’s how Daniel Gustafsson describes the current situation for wind power in Sweden. As Vattenfall’s project manager for wind power in cold climates, he still keeps his head cool. Text: Marie Feuk Photo: Alexander Ruas Translation: Johanna Liljenzin

cing of rotor blades, security issues and 50 billion on renewable energy sources Gustafsson. He is convinced that wind production losses caused by icing. Dan- over the next five years, according to energy is the energy source of the future, iel Gustafsson faces plenty of challeng- its new strategic direction, says Daniel especially in cold climates, despite the Ies. The price on electricity plummeted Gustafsson. It has a clear strategy that fact that the electricity price is so low at in the last three years to the low levels of involves taking a leading role in the present that it has become necessary for the 1990s, and investments in wind power transition to a renewable energy system, some wind farms to make write-downs. declined significantly last year, but he isn’t by phasing out fossil energy production; – The challenge is to produce wind overly concerned about it. coal-fired power plants will be sold and energy at reasonable costs. – Despite of the current electricity price, additional wind turbines will be built. Even if the current investments in Vattenfall will continue to invest, at the wind energy in the northern parts of same rate and higher. The company has This long-term strategy aims to provide Sweden are affected by icing – which has a long-term view of profitability, and the 15 terawatt-hours of wind energy per an effect on both production and safety cost of building wind power has dropped. year by 2020, which is roughly double – there is still great interest in investing The energy giant plans to invest SEK compared to 2015, according to Daniel in wind power in cold climates. Winter

6 is simply the best season for wind power. Another cornerstone in addressing the in mastering the problems. His choice was At low temperatures, the density and problem with icing is cooperation with based on his wish to help saving the world. energy content of wind is higher, leading colleagues in other countries. – Saving the environment is necessary to increased energy production. – We have a cooperation project with for a tolerable life on earth. The western – Also, it’s considerably windier in the colleagues in the Netherlands, regarding world must deal with climate refugees and winter. The colder it gets, the better the ice detection. It involves special methods flooding, and that’s why I have this job. output from the power plants, if all other for measuring ice, from reviewing stand- conditions are alike. ardised turbine data to adding special His interest in technology and environ- vibration sensors in the blades. mental issues arose already in secondary In 2008, as a technology student at KTH Daniel Gustafsson’s prime reason for school. He became a vegan a few years Royal Institute of Technology, Daniel accepting the job of finding solutions for back, not only for ethical reasons, i.e. Gustafsson wrote his master thesis at wind power in cold climates wasn’t only not killing animals, but also because it’s Vattenfall. The thesis dealt with measur- the excitement or the challenges involved climate-friendly. He doesn’t own a car, he ing wind using sodar technology and doesn’t consider himself to be a big con- verifying the measurements based on the sumer, and he tries to live as environmen- results derived. Right after graduation, tally friendly as possible. His conscience he was hired by the company as a wind is still made to suffer from time to time, analyst, a job that involved estimating as he can’t completely avoid air travel – the size of the production and which particularly not at work. problems might arise in projects that – But I try to take the night train Vattenfall considered purchasing. whenever I can”, he says. It was challenging for the new gradu- ate to begin his work on wind power in Daniel Gustafsson doesn’t hold a share in cold climates. According to Daniel Gus- a wind turbine, but he is about to become tafsson, at the time when he was hired, a part owner in an altogether different no one had a good understanding of how wind project. Svarte Petter (Black Pete or climates subject to icing affected produc- "be left holding the baby") is a thirty feet tion losses in wind power plants. sailing boat, and he is about to pay for his – No one at Vattenfall had a decent share in it. method of calculating the effects of icing, – I like sailing, but I have no idea what and no consultants knew how to make model Svarte Petter is. assessments with limited uncertainty. To allow wind energy to contribute to Profession a fossil-free society, municipalities and Eventually, Daniel Gustafsson got some Project manager for the development county councils need to be more under- help. At Vattenfall’s electricity distribu- of wind power in cold climates standing, according to Daniel Gustafs- tion, it had been established that icing Career son. Each time the permit for a new caused relatively big problems in the area MSC from KTH Royal Institute of wind power plant is declined, conditions where the was located, indi- Technology in vehicle engineering, with become harder and costs increase. cating that icing in the area was linked to a specialisation in energy systems. He -It’s our job to convince municipalities was hired by Vattenfall in Solna seven a clear risk of production losses. and county councils to give us reasonable years ago, right after graduation. He – But it wasn’t known at the time that began his career as a wind analyst, permits and make them understand the icing in an average year causes a loss of which involved making calculations effects of turning down wind energy. approximately ten percent. There may for projects that Vattenfall considered According to Daniel Gustafsson, it even be times when the entire wind farm acquiring. isn’t unreasonable to bring the whole must be shut down due to icing. Marital status world on-board the train to a society Daniel Gustafsson has worked hard to Cohabitation in a tenant-owned apart- based on 100 percent renewable energy. make turbine manufacturers accept their ment on Kungsholmen in Stockholm. – Wind power is the key to phasing share of the responsibility for icing, with He doesn’t hold a share in a wind out of fossil energy until 2040. But we turbine, but he purchases wind energy the aim of limiting production losses to a need the political will. from Vattenfall. few percentages. Siemens, which supplied the turbines to Vattenfall’s wind farm Age Otherwise, there is a risk that Daniel 30 years Juktan, has also provided performance Gustafsson, and the rest of us, are left to deal guarantees for the de-icing system. with Black Pete (be left holding the baby).

7 How to detect blade damage To detect damage to a turbine blade, you need to look carefully, either by being close to the blade or by inspecting it remotely, with a camera. Text: Jan Lothigus Photo: Greger Nilsson Translation: Johanna Liljenzin

ike a mountaineer on a mountain are specialised in blade inspections and Braendler Engineering in Copenhagen, wall, the blade inspector low- repairs. They always use mobile aerial Denmark, has developed a system that ers himself down with rope and work platforms to reach the blades. makes it possible to photograph and Lharness from the hub, down along "In a cold climate, we always recom- analyse pictures of damage. The system the blade, which has been placed in a mend repairing damage in connection allows for systematic follow-up on the vertical position. This is called rope ac- with the inspection. If you wait, you status of individual blades over time, cess, and it’s a method that allows the risk that the damage propagates further. similar to when a dentist uses a computer blade surface to be inspected in search of Repairs that would take one hour to carry to monitor a patient’s dental status from defects, which can then be documented. out immediately may require a full day’s one year to the next. Other information The benefit of the method is that only work if you wait a year, says Ville Kark- about the blade can also be recorded in minimal equipment is needed. But if the kolainen, Managing Director of Blade- the system, such as results from other wind is more than moderate, it's better to fence. "It’s simple and cheap to inspect a forms of inspection and data regarding await calmer weather. turbine blade with a camera drone." repairs that have been carried out.

According to Jörgen Svensson at Skelleft- But if you find suspected damage, you Are there other methods for inspect- eå Kraft, rope access is unsuitable in cold still need to send someone up there in ing turbine blades? Yes, it's possible to weather, for safety reasons. If someone a rope or on a aerial work platform to establish the scope of the damage using would get stuck up there on the rope, he inspect it. You might find that a bird ultrasound. According to Orla Sørensen at risks freezing to death before it's pos- has feasted on blueberries and left an Blade Care Consulting in Esbjerg, Den- sible to sort out the equipment needed to imprint, says Thomas Mannelqvist, mark, some blade defects can even be heard bring him or her down. Finnish Blade- head of wind turbine maintenance at from the ground, when the blades sweep fence Oy, with Europe-wide operations, Skellefteå Kraft AB. past. But it takes a trained ear to do so.

8 We are an independent service provider of strategic and operational maintenance in wind, water, power grids and industries. Energiservice takes care of your strategic and operational maintenance so you can concentrate on your core business. We have extensive experience in preventive maintenance and work across the entire process, from optimisation to operational services and emergency preparedness. At new installations and renovations, we can offer project management, design and drawing services. We can also take care of the entire project.

With more than one hundred employees we have a broad expertise and our service portfolio includes a number of special services including thermography, vibration analysis, machine analysis, alignment and balancing, industrial climbing and high voltage maintenance. Our clients range from major power utilities to smaller industrial companies.

www.es.se

9 De-iced blades are a must in icing climates There is great potential for wind power in cold climates, but icing on turbine blades is a major problem. Icing reduces the production of power, and several methods are therefore being developed to remove ice and prevent it from forming.

Text: Jan Lothigius Photo: AnnaKarin Drugge TRANSLATION: Johanna Liljenzin

ith 126 wind turbines, and causes production losses further is expected to exceed the loss during a Skellefteå Kraft AB is south. There are several methods for ad- de-icing stoppage, the de-icing process one of the largest opera- dressing the challenges caused by icing. is initiated. The rotor stops and hot air is tors of wind power in cold blown through the blades, one at a time. W Vestas has chosen climates. According to the company’s to carry out de-icing The de-icing process takes approximately estimates, it would have lost up to 40 per- by blowing hot air through channels in two hours. cent of the production between October the turbine blades. The turbine’s moni- and Siemens have chosen and April without de-icing systems. toring system notices when the actual solutions primarily aimed at preventing In Norrland in Northern Sweden and energy production deviates from the icing: carbon fibre mats embedded in in the northern parts of Finland and expected production (wind speed, power, the front edge of the blades are heated Norway, icing of wind turbines is a con- temperature, etc). A certain deviation using electricity. The de-icing process is siderable problem. But icing also appears is accepted, but if the production loss activated when a measuring instrument

10 on the nacelle indicates that there is a But it’s rare that damage to the blades on atmospheric humidity, the presence risk of icing. is so severe that the operation must be of drops of water, the size of such drops stopped. Most repairs can therefore be and several other factors. The ice destroys Chinese Dongfang Electric Corporation carried out in the summer, when the the effective laminar flow of air around uses a combination of front edge heating weather is fair and the low energy price- the blade, thus reducing the power of the and hot air blown through the blades. mitigates the cost of production losses. wind power plant, which in some cases Dongfang’s turbines differ from the If required, certain repairs can still be must be shut down completely. Vestas turbines in that they can be heated carried out in cold weather – if it isn’t Ice can also form on the trailing edge, with hot air also during operation. But too cold. Carbon fibre mats are mostly but this doesn’t affect the functionality functioning de-icing systems do not only subject to impact (from falling ice) and of the turbine to the same degree. Ice involve heating – it also matters how the damage from lightning. Damage from an can also form on other parts of the blade, heating is controlled, which surface coat- impact on the front edge may cause the such as when a de-icing system causes ice ing has been used on the blades, and if it’s heating mat to generate heat unevenly, to melt on the front edge, or when the possible to operate the turbine in a way giving rise to hotspots. Too much heat turbine stands still. If ice is distributed un- that allows the blades to shake off ice. in one place can damage the underlying evenly on the turbine blades, imbalances Gamesa, another major manufacturer epoxy composite, so it isn’t possible to use may also cause the plant to shut down. of wind turbines, has also developed a the de-icing system in case of a poten- system built to withstand cold climates. tially harmful hotspot. This system has been tested in a wind In collaboration with Skellefteå TECHNOLOGY AT THE FOREFRONT turbine in Torneo in Finland. Kraft, the company Blade Solutions has At the Frauenhofer Institute IPA in Gamesa has developed a patented developed a method to repair the carbon Stuttgart, the next generation system surface treatment based on nano tech- fibre mats used to heat the front edge of for the prevention of ice formation on nology that supposedly makes it more the blade. The repairs restore the carbon turbine blades is under development, difficult for ice to stick on the surface. fibre mat and its conductive capabilities, with financing from the European Like Dongfang, Gamesa has systems for so that the heat is evenly distributed over Union’s framework programme for re- blowing hot air (with 80kW heat power) the entire surface. search and development. The de-icing in the blades combined wtih electrical system aims to prevent icing so quickly Greger Nilsson, heating of the front edge of the blade. The the head of Blade Solu- and efficiently that there is no timefor company has also developed a system for tions, explains that it’s possible to repair ice to form. optimal operation even if a certain amount damage using composites and epoxy, Such a system, if and when it can be of ice has formed, by adapting the pitch of cured by UV light, also in cold weather. commissioned, will have two main the blade. By changing the pitch, it’s pos- Greger Nilsson and his colleagues can benefits: sible to remove ice also from other parts of carry out such repairs hanging in ropes • Power production can continue, with- the blades than the front edge. from the hub. A stroke of lightning in out production losses, as the blade’s a turbine blade can also damage the aerodynamic properties remain intact The inspection and maintenance of heating mat. Even if the blade contains a turbine blades in cold climates is subject lightning conductor, the energy from the • The risk of damage to the blades and to particular challenges. The blades risk lightning may still find its way through the de-icing system caused by falling damage from falling ice, and the de-icing the conducive heating mat. One comfort ice will be eliminated. system may also suffer damage that must is that thunderstorms are considerably Several tiny detectors will be placed be repaired. And this is in addition to less common to the far north, compared along the front edge of the blade. As the type of damage to turbine blades and to Southern Europe, for example. soon as a detector indicates that ice need of measures that also affect wind has formed, that specific part of the turbines located in the south. How ice is formed front edge will be heated. The heating Thomas Mannelqvist is head of wind Certain combinations of temperature mats will be built of electrically condu- turbine maintenance at Skellefteå Kraft. and atmospheric humidity cause ice to cive layers of carbon nanotubes, that Typical damage to the blades involve form on the front edge of the blade. This are only a few micrometres thick. damage from lightning, impact – most appears mostly in temperature zones likely from falling ice –, cracks in joints ranging from +3 to -7°C (yes – even and shearing next to the root of a blade. above zero!). Ice formation also depends

11 Cool & Innovative! +25 years of Cold Climate experience.

Meet us at stand #23 to get familiar with our full service offering!

VTT TECHNICAL RESEARCH CENTRE OF FINLAND LTD www.vttresearch.com

VI SES PÅ WINTERWIND I MONTER 22. Så vill vi (och våra kunder) ha det.

I december 2015 stod Fäbodliden vindpark utanför Vindeln helt klar. 24 turbiner, redo att leverera en effekt på 78 MW. Jemtska var totalleverantör av all infrastruktur samt samordnare och projektledare för vindparken, på uppdrag av Fred.Olsen Renewable. Vi är en komplett partner för dig som anlägger vindkraftsparker. Vårt arbetssätt som bygger på god samverkan, fokus på säkerhet och hänsyn till närmiljön. Så vill vi jobba – och så vill våra kunder ha det.

Projektledning, samordning och samverkan. jemtska.se

KNOWING WIND & HOW EXPERIENCE MAKES A DIFFERENCE 10+ GW of pre-construction projects and 600+ years of turbine data analysed in the Nordic region www.dnvgl.com/renewables

SAFER, SMARTER, GREENER

Wellcome to visit us on stand #32!

Increasing availability Decreasing uncertainty PHOTO: Martin Johansson Icing also in “warm” climates?

cing of wind turbines mostly occurs in accelerometers inside the blades. In this ridges. But the mapping also reveals that clouds, when supercooled droplets of way, it is also possible to detect ice on a there is a 3 per cent risk of icing (10 days water hit the leading edges of the blades wind turbine in stand-still. per year) in large areas of southern Sweden Iand form ice that attach to the surface. There is a general rule of thumb for and in the remainingnorthern inland. The power output decreases, the noise calculating the maximal distance for the This means that problematic icing may increases and the surroundings get risky. risk of being hit by ice thrown from an occur in larger areas than hitherto an- operating wind turbine. That is to mul- ticipated. In addition, the wind turbines Today most manufacturers offer equip- tiply the sum of hub height and turbine increase in height, making them spend ment for ”de-icing” and ”anti-icing”. The diameter with a constant of 1,5. In one more hours in clouds, with more icing as former means simply deicing of wind case the maximal distance was calculated a consequence. turbine blades, normally at stand-still. to be 300 meters. The probability for a In the latter case, the equipment keeps person to be hit at that distance was one Today there are Swedish operating wind the blades of an operating wind turbine in 40 million years. Close to the tower turbines reaching a height of 200 meters, free from ice. Methods generally in use the probability increased to one in 40 and turbines of 240 meters that emerge today utilize heat, either from electrical years. So far there is no reported case of on the drawing board. Yearly losses of 20 resistive heating elements embedded in any human being hit by ice from a wind per cent have been reported. the blade surface or from an electrical turbine, although it is known that cars This icing of turbine blades may ap- heating blower, circulating hot air inside have been damaged. pear to be a problem for the majority of the blades. future, ever-growing wind turbines. Also A functioning method for the indica- The general opinion so far has been that at sites where the risk earlier was deemed tion of ice is to continuously compare challenges associated with icing of wind to be quite small. actual power with the normal power turbines appear in the Swedish inland, at that wind speed. Another method, approximately from Dalarna and north- About the presenter claimed to be faster by the originator wards, especially in hilly terrain. Staffan Engström, consultant has been Bosch Rexroth, is to monitor the eigen- A new mapping produced by Kjeller in the wind turbine frequency of the turbine blade. Some Vindteknikk discloses a slightly different business since 1975. hundred kilogram’s of ice covering the picture: the highest risk (more than 5 per Author of "The surface of a turbine blade will lower the cent of the time) appears on the high- Story of Swedish Wind Power" (in Swedish), frequency, according to the basic laws of est mountain ridges of the Scandinavian ISBN 978-91-7611-109-3 physics. This can be measured by using mountain chain and on the northern inland

13 13 Rotor blades – the gearboxes of the future? For 25 years, wind turbine gearboxes have been a cause for concern for owners and insurance companies alike.

Text: Göran Ronsten Photo: Hans Gedda Translation: Johanna Liljenzin

urbines equipped with gearboxes that the increasingly long blades have nermost unharmed layer. If a small defect have a lower acquisition cost been optimised without due considera- penetrates to the tenth layer, over 40 cm compared to turbines with direct tion for cold climate conditions. The may need to be exposed in the most criti- Tdrives, but the repair and replace- leading edges of the blades erode more cal directions. The repair may be as long ment of gearboxes entail significant one- when precipitation takes solid form, and as one metre, but depending on the local off costs. Also, unplanned replacements many of the new blades used in cold cli- load distribution, it may not be as wide. often cause long standstills, with ensuing mates have too thin a shell. They simply production losses. can’t withstand falling ice. Repair methods must be improved Blade repairs currently require a mini- Blades must not be optimised without Minor blade damage mum surface temperature of +5°C. Con- regard for operations in cold climates may require extensive repairs sequently, only minor blade repairs, where We now see signs that blades may rival Seemingly minor blade defects must be the blade surface can be heated locally, gearboxes as the single most expensive sanded up in size to ensure exposure of a can be carried out in late autumn, winter component from a repair and mainte- sufficiently large area – for example, 4 cm and early spring. Minor repairs can be nance standpoint. A reason for this is – of each damaged layer, and of the in- carried out with workers suspended from

14 momentum, after the adoption of the are required to repair the foil and electri- ropes. Some major repairs require the country’s first wind power bill in 2006, cal joints under the blade surface. work to be carried out on a platform. The standardisation work was in part publicly most extensive repairs require the blade funded. If you take it to the extreme: to be removed or even replaced. The foil, which rapidly heats the surface Each individual foreign manufacturer of the blade alone, should at sufficient engaged by a Swedish or foreign wind De-icing is necessary for power density be capable of handling se- power developer for the construction a variety of reasons vere icing, while consuming little energy. of wind turbines and large wind farms The first large Swedish wind farms in a The hot air solution, which requires the must currently devise unique solutions, cold climate were built in 2004 (Råshön) heating of a larger part of the blade, is as no requirements are included in the and 2005 (Aapua). The blades are not more energy-intensive and cannot handle standards. For example, the future stand- equipped with de-icing systems, so the as severe icing as the foil. ard for wind farm optimisation, IEC farms sometimes stand still for weeks on Hot air has three advantages: (a) the 61400-15 "Site energy yield assessment", end due to icing on the blades. tip of the blade, which is often hit by has received no Swedish funding. In an lightning, can be de-iced; (b) there is no Competition harms collaboration ideal world, manufacturers would use need to modify the material of the blade the standardisation work to defend their The is young and to make the leading edge conducive; and patents, just like they do in the telecom, competition has lead to increasing con- (c) lightning damage is no more expen- vehicle and pharmaceutical industries. fidentiality. Far-reaching collaboration sive than usual to repair. Sweden has no manufacturers of its on safety issues, such as seen within the Blade heating based on circulating hot own, and other Swedish players within transport sector, has only partially reached air has two disadvantages: (d) the highest the wind power industry will not fund the wind power industry. There is no temperature that the blade can be exposed standardisation work, unless Vattenfall is public reporting on breakdowns, incidents to, combined with the slow heat transfer tasked with this in its next appropriation and accidents, unlike in public transport in from the inside to the outside, limits the directions. general and air travel in particular. There de-icing abillity; and (e) when a large used to be no collaboration at all on the Blades become increasingly advanced, part of the blade is heated, this may cause dimensioning of wind power plants in leading to increasingly difficult and ex- self-induced icing, if dry snow melts and cold climates, until recent years, as the lat- pensive repairs refreezes on the blade. est revision of the standard on the design of wind power plants, IEC 61400-1 is Ever since the financial crisis in August about to be adopted. Unfortunately, pro- 2008 (but not before then), manufac- turers have had to listen to customers’ posals for stricter requirements that would 1 benefit the end customers have often been requests for adapting wind turbines to The cost of gearboxes is primarily driven by the torque that each step of the gearbox is designed for. opposed by manufacturers, as they may climates affected by icing. These days, As the first step in a gearbox takes approximately lead to costs in the short term. most manufacturers can supply blades with de-icing systems. The two meth- 70% of the torque, single step gearboxes as used in Multibrid (in Sweden, WinWind) are not that Standardisation efforts are important ods currently used are either based on much cheaper than conventional gearboxes, which a heated foil or on hot air circulated in Sweden only participates in the work can be used with conventional generators. the leading edge of the blade. For blades on the international IEC standards for In addition to the risk of ice throw, rotor blade icing wind power in exceptional cases. Before equipped with heated foil, special, and may also cause noise levels to rise by 10 dB(A). the deployment of wind power gained therefore more expensive, repair methods

Leading safety approach with Ice ArmourTM Maintenance of wind turbines in winter is not risk free. Not least due to the fact that falling snow and blocks of ice may cause a hazard for personnel. This is why we offer the additional option of Ice ArmourTM, security grills for installation on our tracked vehicles or for other types of service vehicles, which provides an efficient protection against falling snow and ice.

15 Program

monday 8 FEBruary- Outside session rooms

11.00 – 20.00 Site visit to Mullberget 8 Hosted by: Mullbergs Windfarm and Siemens FEB

19.00 – 21.00

Registration Stand & poster set up

TUESDAY 9 FEBruary

08.00 – 10.00 Registration 9 FEB

10.00 – 11.30 session 1 ARENA Inauguration and keynote presentations Chairs: Jeanette Lindblad and Göran Ronsten • North Asia driving the wind industry Sebastian Meyer, Azure International, CN

• The European Commission’s "WinterPackage" and the latest developments regarding cooperation and market integration of renewable energy Dörte Fouquet, BBH, EREF, DE

• Moving forward in a frosty market Daniel Gustafsson, Vattenfall Wind Power, SE

11.30–13.00 Lunch & Exhibition

12.30–12.55 poster PRESENTATIONS

01. reliable ice detection for rotor blades to increase availability and yield of wind turbines — Bernd Wölfel, Wölfel Wind Systems, DE 02. in Situ Instrument AB - your overall partner when it comes to measuring wind in any environment — Emil Lindblom, In Situ Instrument, SE 03. airborne de-icing solution for wind turbines — Hans Gedda, Alpine Helicopter, SE

13.00 – 14.30 session 2 ARENA SOLSKOG SNÖJUS Forecasting, cloud physics, HSE Inspection and repair aerodynamics (Health, Safety and Environment) Chairs: Anna Coulson Sjöblom and Hans Bergström Chairs: Ylva Odemark and Dag Haaheim Chairs: Helena Wickman and Sven-Erik Thor • Benchmark study of icing forecasts. • Integrated approach to safety and asset • Assessing the likelihood of hail impact Do they really add a value? performance in cold climates Damage on Wind Turbine Blades Ben Martinez, Vattenfall R&D, SE Arve Sandve, Lloyd's Register Hamish Macdonald, University of Consulting, NO Strathclyde, GB

16 Program

• Ice detection methods • Uncertainty quantification for wind • Blade heat system repair, part II and measurements power forecasts in cold climates Greger Nilsson, Blade Solutions, SE Matthew Wadham-Gagnon, Esbjörn Olsson, SMHI, SE TechnoCentreéolien, CA • Quantifying the impact of ice accretion • IceRisk forecast system for on turbine life for typical Scandinavian • Towards validation of microphysics operational wind farms sites using numerical modelling schemes in numerical weather prediction Rolv Erlend Bredesen, Ricard Buils Urbano, models for icing applications Kjeller Vindteknikk, NO DNV GL - Energy Advisory, GB Magnus Baltscheffsky, WeatherTech Scandinavia, SE

• On-site measurement from cold Climate - possibilities and applications towards validation of CFD model Marie Cecilie Pedersen, Vattenfall Vindkraft, SE

14.30 – 15.30 BREAK – poster PRESENTATIONS & Exhibition

04. Optimizing wind and icing — Case Finland, Simo Rissanen, VTT, FI 05. cost effective system for ice throw detection — Najeem Lawal, Mid Sweden University, SE 06. a study of maintenance performance indicators for the European offshore wind farms in cold climate regions — Mahmood Shafiee, Cranfield University, GB

15.30 17 – 17.00 Session 3 ARENA SOLSKOG SNÖJUS Resource assessment, measure- De-/anti-icing including ice de- IEA TASK 19 ments and models tection &control & PANEL DISCUSSION Chairs: Katja Hynynen and Ben Martinez Chairs: Marie Cecilie Pedersen and Till Beckford Chairs: Carla Ribeiro and Sebastian Meyer • An experimental study on the use of • Wet-snow production and snowing • Overview of IEA wind Task 19 nanosecond-pulsed dielectric barrier wind tunnel test for snow accretion and results from 2013-2015 discharge plasma actuators for de-icing prevention Ville Lehtomäki, VTT, FI of aerospace structures Kengo Satoh, Snow and Ice Research Jakob Van den Broecke, Delft University Center,National Reserch Institute for • IEA Task 19, standardised methodology of Technology, NL Earth Science and Disaster Prevention, JP for the elaboration of the ice throw risk assessments • Frozen anemometers and bias in the • Prediction of production losses in cold Andreas Krenn, Energiewerkstatt, AT wind resource climates and ice protection system de- Validation of the IEA Task 19 Lasse Johansson, Sweco, SE sign by computational fluid dynamics • Massimo Galbiati, EnginSoft, IT ice site classification • Mast measurements in cold climate René Cattin, Meteotest, CH • Assessment of de-icing and anti-icing challenges and recommendations • Classification based approach Sónia Liléo, Sweco, SE technologies in ice wind tunnel Nadine Rehfeld, Fraunhofer IFAM, DE for Icing detection Zouhair Khadiri-Yazami, • New advances in icing measurements Fraunhofer IWES, DE and icing predictions, Øyvind Byrkjedal, • Panel discussion: What should IEA Task Kjeller Vindteknikk, NO 19 take into account when working with the new draft standard IEC 61400-15 “Site energy yield assessment” in 2016-17? Ville Lehtomäki, VTT, FI

17.00–19.00 MINGLE IN EXHIBITION HALL 19.00– DINNER AND ENTERTAINMENT Note. Wallman show starts at 7pm

17 wednesday 10 FEB 10 08.30 18 – 10.00 Session 4 FEB ARENA SOLSKOG Strategier EM/Vattenfall/Canada De-/anti-icing including ice detection & control Chairs: Ville Lehtomäki and Jos Beurskens Chairs: Nadine Rehfeld and Matthew WadhamGagnon • A Look at wind turbine performance in •  An approach in using guided waves for ice detection Canadian icing climate on wind turbines Dominic Bolduc, TechnoCentre éolien, CA Siavash Shoja, Chalmers University of Technology, SE

• The Swedish Energy Agency strategy within wind energy, • Combined effect of the heating and the superhydrophobic coat- Pierre-Jean Rigole, Swedish Energy Agency, SE ing on the deicing capability of the ultrasonic wind sensor Tomofumi Saito, Kanagawa institute of technology, JP • An overview of Vattenfall's research within turbine icing – Yesterday, today and tomorrow • Performance of two nacelle-mounted ice detectors: a case study Ylva Odemark, Vattenfal, SE Katja Hynynen, Lappeenranta university of technology (LUT), FI • Wind turbine ice detection systems testing David Futter, Uniper Technologies Ltd, UK Real-World icing distribution analysis based on data from surface sensors Michael Moser, eologix sensor technology, AT

10.00 – 10.30 BREAK - poster PRESENTATIONS & Exhibition

07. Ice detection via advanced infrared image analysis — Mikko Tiihonen, VTT, FI 08. monitoring systems for harsh climate — Patrik Jonsson, Combitech, SE 09. recent development on blade mounted and nacelle mounted ice detectors, — Tatu Muukkonen, Labkotec, FI

Innovation in meteorological solutions Quality. Reliability. Support.

long-term reliability.

Find out more at gillinstruments.com or visit Stand 12 MaxiMe t 10.30 – 12.00 SESSION 5 ARENA SOLSKOG SNÖJUS Production experience, losses DOM (Deployment, Operations Standards and Offshore and Maintenance) Chairs: Rebecka Klintström and Jakob Van den Broecke Chairs: Sónia Liléo and Andreas Krenn Chairs: Anne Mette Nodeland and René Cattin • Update of DNV GL’s empirical icing • Swedish Wind Energy Association's • Validation of icing atlases based on map of Sweden and methodology of view on wind energy in cold climates SCADA data estimating icing losses using further Bengt Göransson, Dag Haaheim, Pöyry Timo Karlsson, VTT, FI Nordic wind farm data Sweden AB, SE / Statkraft Sverige AB, SE Till Beckford, DNV GL, GB • Pre-certification of cold climate instru- • Forecasting wind turbine icing: the ments and coatings • Methods for estimation of occurred value of icing forecasts trading on the Tuomas Jokela, VTT, FI icing losses in operational wind farms, day-head energy market measurements and modelling Jon Collins, DNV GL, GB • Simulations of drifting sea ice loads Johan Hansson, Kjeller Vindteknikk, SE on ofshore wind turbine support • Applications of iced wind turbine noise structures • A roadmap for understanding the simulations Simo Rissanen, VTT, FI performance of numerical weather Richard Hann, Richard Hann prediction based models for predicting Consulting, DE long-term wind farm production losses due to ice accretion on blades Daran Rife, DNV GL, US

12.00–13.30 Lunch & Exhibition

13.00 – 13.25 poster PRESENTATIONS

10. Decommissioning of wind farms – ensuring low environmental impact — Liselotte Aldén, Uppsala University, SE 11. Doing a meso-scale re-analysis using the WRFmodel – does it matter for the resulting icing climatology which version of WRF you use? — Hans Bergström, Uppsala University, SE 12. Determination of the actual ice mass on wind turbine blades; Measurements and methods for avoiding excessive icing loads and threads — Daniel Brenner, Bosch Rexroth Monitoring Systems (BRMS), Dresden,DE

13.30 – 15.00 SESSION 6 ARENA – Panel discussion and summary Safe and reliable operation in cold climate conditions – today and in the future Chairs: Åsa Elmqvist and Anders Järvelä

Five short presentations prior to panel discussion • E NERCON. Experiences with wind energy turbines in icing conditions Anne Mette Nodeland, ENERCON, DE

• Vestas cold climate offerings to cope with icing conditions Brian Daugbjerg Nielsen, Vestas, DK

• Siemens. Improving output in harsh conditions Annike Skovgaard Sørensen, Siemens Wind Power, DK

• Nordex anti-icing system on N131 wind turbines – development and validation Andreas Beyer, Nordex Energy, DE

• Dongfang experience in low temperature wind turbine de-icing Honghua Zhong, Dongfang Electric Corporation, CN

• Summary (assisted by Jos Beurskens and Sven-Erik Thor) Daniel Gustafsson, Dörte Fouquet, Vattenfall, SE/BBH EREF, DE

19 Exhibitors

Meet our Exhibitors Some of the industries most interesting companies ranging from contractors, operators and specialists – all eager to show their latest innovations.

(N90/2500, N100/2500, N117/2400) and nate all the contracts and control the Generation Delta (N100/3300, N117/3000, subcontractors to work in a safety manner. We

N131/3000) comprise turbines for strong, me- are responsible for all the Civil and Electrical Vattenfall AB – Powering the transition dium and light wind sites. Solution-driven in- works and of course H&S. Jämtkraft Park to renewables. Climate change associated novations, a dense service network, preventive Management provides comprehensive with greenhouse gas emissions is seen as maintenance, anti-icing system and end-to-end solutions and helps you with everything you the greatest environmental challenge facing modernization are also part of the company’s need for your Wind park and for problem-free humanity. Today’s energy system is a large offer. Nordex has installed a total of around ownership. Come to stand no.22 and we´ll tell contributor to overall emissions of greenhouse 6,500 turbines with an aggregate capacity of you more how we can make your project come gases. Our strategy: To be among the leaders more than 11,500 MW all around the world. true. in developing environmentally sustainable energy production by reducing the company’s CO2 exposure and transforming the produc- tion portfolio towards more renewable produc- tion. ENERCON products are known for their VTT Technical Research Centre of Finland innovative technology, outstanding reliability Ltd is the leading research and technology and excellent returns on investment, world- company in the Nordic countries. We develop wide. With its tried and tested drive system, new smart technologies, profitable solutions

constant technological sophistication and high and innovative services. Wind power is an The Swedish Energy Agency works for a quality standards, the company has been set- important part of VTT’s R&D in energy and we sustainable energy system, combining ecologi- ting benchmarks in the wind energy industry have over 20 years of cold climate experience. cal sustainability, competitiveness and security for 30 years now. Currently, the product cata- Our activities cover the whole value chain from of supply. The Agency finances research for logue includes turbines ranging from 800 kW resource assessment, system integration, wind new and renewable energy technologies, smart to 7,500 kW. ENERCON has already installed turbine technology to wind power production grids, and vehicles and transport fuels of the more than 24,800 turbines worldwide with a and O&M. We serve the needs of our cus- future. The Agency supports commercializa- total rated power of more than 39.2 gigawatts. tomers through direct contract research and tion and growth of energy related cleantech. development, but also through active national and international R&D collaboration with uni- versities, research centres and industries.

Gill Instruments is a world leader in the design STV is manufacturing tracked vehicle for and manufacture of meteorological solutions heavier loads that is perfectly suitable for based on their highly successful ultrasonic service and maintenance at the wind mill park. anemometer range. These types of tracked vehicles are extremely Wicetec is a company established 2014 to Gill has over 25 years experience in producing suitable in sensitive environments, and can be sell the proven Finnish wind turbine blade ice sensors for Wind Speed and Direction using used on both bare ground, marshes, swamps prevention system. Wicetec wraps the technol- their 2d and 3d platforms, with more complex and as over snow vehicles. With the most mod- ogy and Finnish cold climate experience of 25 Weather Monitoring Systems based around the ern engines they also meet the environmental years to an effective package to deliver “winter MaxiMet and MetPak platforms. Gill products requirements of our customers. Maintenance ride-through” feature for your wind farm. The are renowned for their rugged design and work in winter climate may be associated with turbibes will be in operation without icing excellent long-term reliability in a wide range the risk of falling ice. Our Ice ArmorTM has losses. 500MW of wind power is currently of harsh and inhospitable environments where met great interest from our customers. With operating equipped with the technology. ultrasonic technology is deployed in order to it installed, staff can travel safely at the wind  www.wicetec.com take advantage of enhanced accuracy, reduced mill park.The vehicles can be equipped with maintenance and calibration on the basis of no platforms, cranes, fuel tanks and work shop moving parts. modules to make your service and mainte-

nance easy. STV has delivered tracked vehicles Energiservice. We are an independent all over the world to work in the most demand- service provider of strategic and operational ing conditions. maintenance in wind, water, power grids and Jemtska and JK Park Management is a industries. Energiservice takes care of your full-service partner for companies who are strategic and operational maintenance so you establishing wind farms. Our owner is Skanska can concentrate on your core business. We The Nordex Group is one of the leaders and Jämtkraft, so we have all the necessary have extensive experience in preventive main- in multi-megawatt wind power systems. experience and expertise for project managing tenance and work across the entire process, The product range of Generation Gamma and building your wind farm. We will coordi- from optimisation to operational services and

20 Exhibitors

emergency preparedness. At new installations turbine manufacturers, their sub suppliers, Its approximately 17,000 employees generated and renovations, we can offer project manage- independent service companies, project annual sales of CHF 5.6 billion in 2014. ment, design and drawing services. We can developers and turbine owners. Visit us on also take care of the entire project.With more www.ll-systems.com than one hundred employees we have a broad

expertise and our service portfolio includes a fos4X’s fos4IceDetection system number of special services including thermog- measures the vibrations at the tip of the rotor raphy, vibration analysis, machine analysis, Total Wind Service AB är ett företag blade which leads to a very reliable detection alignment and balancing, industrial climbing specialiserat på nyckelfärdiga lösningar inom of smallest amounts of ice on the rotor blade. and high voltage maintenance. Our clients transport, installation, service, underhåll och It operates even after a shutdown of the wind range from major power utilities to smaller leverans av reservdelar till vindkraftverkTotal turbine and at very low wind speeds – hence industrial companies. Wind har dotterbolag i 11 länder på tre an automatic restart is feasible. kontinenter och erbjuda tjänster i hela världen. Svenska huvudkontoret finns i Veddige utanför Varberg förnärvarande är vi 18 anställda.

is one of the world’s leading suppli- Siemens Alpine Helicopter Sweden AB. With a heli- ers of offshore and onshore windpower solu- copter and hot water, Alpine Helicopter AB tions, including services throughout the entire has made it their business idea to de-ice the life cycle of the wind turbines. Empower is a forerunner in providing blades rather than waiting for thaw. Until now, Nearly 13,000 wind turbines around the globe comprehensive Wind Power Services. They there has been no other alternatives than to with a total capacity of 21 GW help to provide cover the entire life span of wind farms from wait for the ice to melt if the wind turbine isn’t the world with clean, renewable energy. development to construction, maintenance equipped with a de-icing system. Siemens has long experience of working with and service. For example, development stage turbines in cold climate areas. Welcome to our engineering, cold climate specialized wind booth where we will tell you more about our measurement deliveries, turnkey construction solutions. services, scheduled and corrective mainte- WeatherTech Scandinavia AB offers qualified nance and project management services are consultancy services such as customized wind parts of our service scope. With our long-term and weather related reports, icing studies and extensive experience we can adapt our and weather forecast services for the power DNV GL in the Energy Industry. In DNV GL services according to our customers’ needs as industry and actors on the energy market. We we unite the strengths of DNV, KEMA, Garrad a comprehensive service integrator or service have broad meteorological competence from Hassan and GL Renewables Certification. DNV provider. In addition to Wind Power Services university and wind industry including many GL’s 2,500 energy experts support customers Empower has also extensive experience in Grid years of experience from modelling atmos- around the globe in delivering a safe, reliable, and Telecom Engineering and Construction pheric processes. efficient, and sustainable energy supply. We Services. These can be included in all our Wind deliver world-renowned testing, certification Power Life Cycle Packages. and advisory services to the energy value chain including renewables and energy efficiency. Our expertise spans onshore and offshore Danske Commodities offers complete

wind power, solar, conventional generation, solutions for production management of wind Bladefence is a specialist for wind turbine transmission and distribu­tion, smart grids, and farms. We are an independent, international blade condition analysis, repairs and mainte- sustainable energy use, as well as energy mar- energy commodities trader and provide an nance. The company utilises advanced skylift kets and regulations. Our testing, certification array of energy-related services. Founded in equipment and UV-curing blade repair method and advisory services are delivered independ- 2004, we now operate in 30+ countries bring- in its operations. In combination, these en- ent from each other. Learn more at ing passion, building trust and creating value in able operations in harsh weather conditions, every market we enter. www.dnvgl.com/energy cutting-edge efficiency and minimise turbine downtime. The company was certified by Ger- manischer Lloyd for blade repairs in 2012 as the first company in the Nordic countries. Leine Linde is in the German DR. J. HEIDEN- In Situ Instrument AB is an innovation- HAIN group of companies, your main point of oriented company that develops and delivers contact for renewable energies, especially for measurement systems for environmental

wind power. We are a daughter company of measurements in soil, water and air. We pro- SIKA CORPORATE PROFILE Sika is a Swedish Leine & Linde AB. vide technical solutions including installation, specialty chemicals company with a leading We supply Slip rings for pitch and generators, monitoring, maintenance and repairs, all ac- position in the development and production ADSR®, Encoders (absolute, incremental, cording to the customer’s specific needs. Our of systems and products for bonding, sealing, optical, inductive, magnetic), Ice detection products and solutions are based on world- damping, reinforcing and protecting in the IPMS®, Temperature-, Humidity- and leading technology and are developed in close building sector and the motor vehicle industry. Condensation Sensors, Pre-assembled Cables + cooperation with customers, leading providers Sika has subsidiaries in 91 countries around the Leads, Pitch motors, Functional Safety, FSR®, and research institutions. world and manufactures in over 160 factories. EnDat and Resolver worldwide to a lot of wind

21 Exhibitors

 Inspirational meetings, seminars, fairs multi-brand, multi-skill approach, combined with  Website, newsletter local competencies, has been the foundation for Factual information to the public and decision providing wind turbine operators and owners with Eologix sensor technology gmbh was founded makers unrivalled reliability and service. in 2014. The company develops innovative sen- We adapt to individual needs and are focused on sors for smart surfaces. The first product was the full lifecycle of wind turbines. Our reputation is launched in early 2015 and is a thin, autono- built on efficiency, flexibility and safety within wind

mous and retrofittable sensor for icing detec- turbine service and maintenance, gear refurbish- Vindval collects and provides scientific knowl- tion in for wind turbines. The patented solution ment and replacement, and retail of spare parts. edge of wind power’s impacts on humans and can be used to reduce stand-still times as well We deliver integrated, high-value services that help nature. The program is a cooperation between as to effectively control anti- and de-icing maximize yield and protect assets – providing all the Energy Agency and the Swedish EPA. equipment. Due to the easy mounting process you need from a single point of contact. on the rotor blades, it can be used for all types of wind turbines, also as a retrofit solution.

Vindforsk is a technical research programme run by the Energy Agency in cooperation with

the Swedish industry. The project’s aim is to in- EnginSoft specializes in computational fluid dy- FORCE Technology provides highly specialised crease knowledge and strengthen the Swedish namics and ice accretion, we support wind turbine engineering solutions. Our services cover the wind power industry’s knowledge base. manufacturers and wind farm operators to predict entire life cycle of the wind turbine from top to turbine performance and wind farm power output bottom and almost any technical area relating in icing conditions. to the wind industry. We supply critical The use of advanced simulation technology is services such as design recommendations, fundamental for development of ice protection inspection, failure investigation and analysis, systems based on electro-thermal and hot air heat- chemical analysis and metallurgical examina- Statoil Lubricants is a European organization ing. EnginSoft Nordic are known as ”Key partner in tions. with operations in Scandinavia, Poland, the design process innovation” for many of the Nordics Baltics and Russia. Our lubricants business most well-known businesses. Come to our booth to covers everything from research and develop- learn more. ment to production and sales. We offer a complete range of products and services for all FT Technologies are the leading manufacturer types of industries. The entire operation is

of ultrasonic wind sensors for turbine control. certified according to environmental and Vaisala. When you fully understand your environ- At Winterwind we are introducing our new quality standards ISO 9001:2008 and ISO ment, you make confident, accurate decisions. As 75m/s FT742 sensor with improved accuracy. 14001:2004. From 1 October 2015 Statoil experts in weather for 80 years, Vaisala is commit- Featuring our patented Acoustic Resonance Lubricants is a part of Fuchs Petrolub. ted to helping you understand the risks associated technology our small, tough wind sensors are with the impact of weather. With the acquisitions easily heated, help to improve output and of 3TIER and Second Wind, Vaisala has created an reduce costly turbine down-time. integrated suite of renewable energy assessment, Nibe Wind Components – Heating solutions forecasting, asset optimization, and measurement and equipment for wind turbine erected in cold solutions to help customers around the globe climates. Heating blankets for blade repair as make the right decision when it comes to weather. NEAS is an independent international energy well as nacelle fan heaters and other related With this combination, Vaisala offers products and asset management company with activities heating products for maintenance on site, is services for all phases of a wind project. in power, gas and related commodity markets our focus! NWC offer all kind of heaters for throughout Europe, both physical and financial. cold climate turbine applications. Ask us! We are one of the leading partners on the northern Europe market with a portfolio over 5000 MW, offering balancing and trading of NÄTVERKET FÖR VINDBRUK

power and certificates. www.natverketforvindbruk.se Rope Access Group provides contract services in wind power industry with the help of IRATA® industrial climbing, rope access and offers a wide range of training courses, whether you are a wind technician, subcon- Jämfrakt has more than 125 years´ experience of Vindkraftcentrum. Our mission is that the tractor or rescue personnel. We have offices producing energy from renewable sources. Jämt- large investments made – as much as possible in Solna (Stockholm), Gothenburg, Malmö, kraft works with every stage of the process from – should benefit the population in the forms of Östersund and Piteå. construction of wind farms to operating, control- jobs and businesses. We identify the possibili- ling and monitoring windturbines and internal ties and facilitate contacts. networks. Jämtkraft group offer a professional  Company database – 2700 addresses range of full asset management services includ-  Matching tools Connected Wind Servicesis Europe’s ing balancing, trading and hedging of power, EL  Industry knowledge certificate and GoO:s.  Business development strongest independent service provider for  Business advise wind turbines. For more than 25 years, our

22 Organizer

Swedish Windpower Association is primarily representing wind power owners but is Our focus areas to open to all. We are an established referral organization with over 30 years of experience Education in wind power and with more than 1,500 members. The association publish annually; Acceptance Tidningen Svensk Vindkraft, the leading trade publication in Sweden. The association is Member values active in Sweden as well as internationally, promoting the development of windpower. Cold Climate A non-profit and apolitical association. Next practice Support our work, become a member! Swedish Windpower Association is a member Swedish Windpower Association is an active participant in the debate on windpower of World Wind Energy Association. conditions and development in Sweden. As a member do you support our work against WWEA is a global association embracing the politicians, authorities and other stakeholders. For more info about our members benefits wind sector worldwide, with more than 600 and how to become a member, visit our booth during Winterwind or our website: members in around 100 countries. www.svensk-vindkraft.org/bli-medlem WWEA works for the promotion and world- wide deployment of wind energy technology.   We promote trends in technological development, completely front edge. CONTACT   We are active through referrals to influence improved economic Ulla Hedman Andrén, Director of and financial conditions. Operations [email protected] 00 46 76 71 60 550   We cooperate with authorities, institutions, organizations and industry. Mobile: www.svensk-vindkraft.org   We continuously attempt to learn something new that will benefit the members.

Öka din avkastning Det är stort att äga vindkraft — framtiden är beroende av att vi nyttjar den kraft som finns i vinden.

För dig som har investerat i förnybar energi i form av vindkraft är en kostnadseffektiv, optimerad, övervakning och förvaltning viktig för lönsamheten. Jämtkraft hjälper dig gärna. Vi har den kompetens och erfarenhet som krävs.

Jämtkraft koncernen erbjuder er hjälp med heltäckande förvaltningstjänster. Vi sköter drift underhåll och övervakning dygnet runt. Vi tar även hand om samtliga elnätsfrågor. Och vi erbjuder en för branschen skräddarsydd ekonomiadministration. Det sista steget är att förvalta den elproduktion som din vindkraft ger och att sälja den på Nordpool så att du får så mycket som möjligt ut av din investering i förnybar energi.

Kontakta oss för mer information. Telefon 063-149000 www.jamtkraft.se

23 Proud sponsor of Winterwind 2016