Optimal Control of Power Kites for Wind Power Production
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Power Kite Wind Speed Guide
Power kite wind speed guide Continue Photographer: Nathan Kirkman 1 of 13 Changing wind on the roof, a trellis photovoltaic solar panel topped with ten feet high vertical axis wind turbines -first ever approved in the city of Chicago for residential use. Together, they produce about 10,000 kilowatt-hours of electricity per year, which is about half the building's electrical needs, said project architect Greg Gibson. 2 of 13 Change in Wind owners Lisa and Frank Mauceri in their unique home; The Bucktown building is the only LEED for a gold-certified single-family home in Illinois. 3 of 13 For ultimate comfort in the living room, the owners chose the warmest parts of the Togo that Michelle Ducaroy designed for Ligne Roset in the 1970s and the wool rose carpet of Nani Markina; Lighting includes a pair of vintage Artimede floor lamps and a Foscarini Supernova pendant from YLighting. 4 of 13 Wind Change eco-savvy Valcutin kitchen. 5 of 13 Changing Wind Architect Michael Wilkinson (left) with colleague Greg Gibson 6 of 13 Changing Wind Transparent Kartell Furniture 7 of 13 Changes in the wind of solar bricks on the roof absorb sunlight during the day and mark the way to the roof of the garden at night 8 of the 13 Wind Change Enkasonic sound management matting (usually used to isolate the acoustic floor collection) is a decorative element in the first floor of the Mauceris Office. 9 of the 13 Wind Change Shiny white valcutine cabinets in the main bath are tempered by soft-gray concrete countertops; The mirror reflects the back staircase to the green roof. -
Motor/Generator Design Optimization for a Drag Power Kite
Bachelor thesis, research internship, advanced seminar, or master thesis Motor/Generator Design Optimization for a Drag Power Kite Contact/Applications to: Florian Bauer,∗ florian:bauer@tum:de Announcement date: February 23, 2020 Motivation Power generating kites have the potential to generate clean energy at a low cost competitive with coal power plants or cheaper without subsidies (see e.g. [1, 2, 3] and references therein). \Drag power" kites generate power with onboard wind turbines and generators by flying fast crosswind motions, see Fig. 1. Electrical power is transmitted to the ground at a medium voltage level via electric cables in the tether. Figure 1: 20 kW \drag power" kite visualization of kiteKRAFT (image source: http://kitekraf t:de/Images/20kWProduct:png, accessed: Aug 11, 2019). ∗Institute for Electrical Drive Systems and Power Electronics, Department of Electrical and Computer Engi- neering, Technical University of Munich 1 Tasks, Suggested Solution Approach, Expected Results The eight gear-less motors/generators (electrical machines) of kiteKRAFT's kite are currently standard low-voltage RC components, shown in Fig. 2. In the next generation kite, an optimized Figure 2: Powertrain of kiteKRAFT's 5 kW kite (image source: https://miro:medium:com/max /1000/1*hcj4kgUC1NLrYeP -CLJAw:jpeg, accessed: Feb. 23, 2020). machine for the optimal DC link voltage of around 800 V shall be designed. Starting from a literature survey and sourcing information from electrical machine designers and manufacturers, an optimal machine shall be designed and a prototype shall be built and tested. Starting point is the literature list below and a longer literature list provided upon start of work. -
The Laddermill - Innovative Wind Energy from High Altitudes in Holland and Australia
Published at: Windpower 06, Adelaide, Australia The Laddermill - Innovative Wind Energy from High Altitudes in Holland and Australia Bas Lansdorp Delft University, The Netherlands Paul Williams RMIT University, Melbourne, Australia Abstract The Laddermill is a novel concept to harvest electricity from high altitude winds. The concept’s operating principle is to drive an electric generator using tethered kites. Several kites are deployed to altitudes of more than 1 km by means of a single cable that is connected to a drum on the groundstation. The upper portion of the cable is connected to the high altitude kites, whereas the lower portion of the cable remains wound around the drum. The kites are controlled to pull the cable from the drum, which in turn drives a generator. After most of the cable is pulled off the drum at high tension, the kites are controlled to fly down in a configuration that generates significantly less lift than during the ascent, thereby reducing the cable tension. The lower portion of the tether is retrieved onto the drum and the process is repeated. The concept allows very large power outputs from single units. The Laddermill concept is being studied at Delft University of Technology, with additional assistance from RMIT University. As part of this cooperative effort, Delft has gathered significant practical experience, including successful demonstration of a small-scale 2 kW Laddermill, as well as having investigated alternative groundstation designs and other kite concepts. At RMIT, modelling, optimisation, and control design for the system has been studied. This paper presents a summary of some of these achievements and will report on future plans. -
Comparative Study of Wind Turbine Placement Methods for Flat Wind Farm Layout Optimization with Irregular Boundary
applied sciences Article Comparative Study of Wind Turbine Placement Methods for Flat Wind Farm Layout Optimization with Irregular Boundary Longyan Wang 1,2,3 1 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China; [email protected] 2 School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane 4001, Australia 3 Department of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada Received: 18 December 2018; Accepted: 11 February 2019; Published: 14 February 2019 Featured Application: The comparative results of the effectiveness of different wind turbine placement methods will facilitate the application of a more advantageous method to be used for the wind farm design, and hence improve the cost effectiveness of wind power exploitation. Abstract: For the exploitation of wind energy, planning/designing a wind farm plays a crucial role in the development of wind farm project, which must be implemented at an early stage, and has a vast influence on the stages of operation and control for wind farm development. As a step of the wind farm planning/designing, optimizing the wind turbine placements is an effective tool in increasing the power production of a wind farm leading to an increased financial return. In this paper, the optimization of an offshore wind farm with an irregular boundary is carried out to investigate the effectiveness of grid and coordinate wind farm design methods. In the study of the grid method, the effect of grid density on the layout optimization results is explored with 20 × 30 and 40 × 60 grid cells, and the means of coping with the irregular wind farm boundary using different wind farm design methods are developed in this paper. -
Challenges for the Commercialization of Airborne Wind Energy Systems
first save date Wednesday, November 14, 2018 - total pages 53 Reaction Paper to the Recent Ecorys Study KI0118188ENN.en.pdf1 Challenges for the commercialization of Airborne Wind Energy Systems Draft V0.2.2 of Massimo Ippolito released the 30/1/2019 Comments to [email protected] Table of contents Table of contents Abstract Executive Summary Differences Between AWES and KiteGen Evidence 1: Tether Drag - a Non-Issue Evidence 2: KiteGen Carousel Carousel Addendum Hypothesis for Explanation: Evidence 3: TPL vs TRL Matrix - KiteGen Stem TPL Glass-Ceiling/Threshold/Barrier and Scalability Issues Evidence 4: Tethered Airfoils and the Power Wing Tethered Airfoil in General KiteGen’s Giant Power Wing Inflatable Kites Flat Rigid Wing Drones and Propellers Evidence 5: Best Concept System Architecture KiteGen Carousel 1 Ecorys AWE report available at: https://publications.europa.eu/en/publication-detail/-/publication/a874f843-c137-11e8-9893-01aa75ed 71a1/language-en/format-PDF/source-76863616 or https://www.researchgate.net/publication/329044800_Study_on_challenges_in_the_commercialisatio n_of_airborne_wind_energy_systems 1 FlyGen and GroundGen KiteGen remarks about the AWEC conference Illogical Accusation in the Report towards the developers. The dilemma: Demonstrate or be Committed to Design and Improve the Specifications Continuous Operation as a Requirement Other Methodological Errors of the Ecorys Report Auto-Breeding Concept Missing EroEI Energy Quality Concept Missing Why KiteGen Claims to be the Last Energy Reservoir Left to Humankind -
Airborne Wind Energy
Airborne Wind Energy Jochem Weber, Melinda Marquis, Aubryn Cooperman, Caroline Draxl, Rob Hammond, Jason Jonkman, Alexsandra Lemke, Anthony Lopez, Rafael Mudafort, Mike Optis, Owen Roberts, and Matt Shields National Renewable Energy Laboratory NREL is a national laboratory of the U.S. Department of Energy Technical Report Office of Energy Efficiency & Renewable Energy NREL/TP-5000-79992 Operated by the Alliance for Sustainable Energy, LLC August 2021 This report is available at no cost from the National Renewable Energy Laboratory (NREL) at www.nrel.gov/publications. Contract No. DE-AC36-08GO28308 Airborne Wind Energy Jochem Weber, Melinda Marquis, Aubryn Cooperman, Caroline Draxl, Rob Hammond, Jason Jonkman, Alexsandra Lemke, Anthony Lopez, Rafael Mudafort, Mike Optis, Owen Roberts, and Matt Shields National Renewable Energy Laboratory Suggested Citation Weber, Jochem, Melinda Marquis, Aubryn Cooperman, Caroline Draxl, Rob Hammond, Jason Jonkman, Alexsandra Lemke, Anthony Lopez, Rafael Mudafort, Mike Optis, Owen Roberts, and Matt Shields. 2021. Airborne Wind Energy. Golden, CO: National Renewable Energy Laboratory. NREL/TP-5000-79992. https://www.nrel.gov/docs/fy21osti/79992.pdf. NREL is a national laboratory of the U.S. Department of Energy Technical Report Office of Energy Efficiency & Renewable Energy NREL/TP-5000-79992 Operated by the Alliance for Sustainable Energy, LLC August 2021 This report is available at no cost from the National Renewable Energy National Renewable Energy Laboratory Laboratory (NREL) at www.nrel.gov/publications. 15013 Denver West Parkway Golden, CO 80401 Contract No. DE-AC36-08GO28308 303-275-3000 • www.nrel.gov NOTICE This work was authored by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U.S. -
Aerial Wind Turbine
Aerial Wind Turbine A Major Qualifying Project Report Submitted to the faculty Of Worcester Polytechnic Institute In partial fulfillment of the requirements for the Degree of Bachelor of Science Submitted By: Kevin Martinez Andrew McIsaac Devin Thayer Advisor: Professor Gretar Tryggvason Date: April 30, 2009 Abstract: Land based wind turbines are not used to their fullest potential due to the inconsistency of wind near the earth’s surface. The goal was to determine if a structure could be designed and built to harness wind energy at high altitudes. Using a non-rigid airship, a design was created to lift wind turbines up to a desired height while still achieving a moderate power output. 2 Executive Summary: The rising cost of oil is increasing the need to find alternative energy sources. One source is harnessing the power of wind which is less harmful to the environment. Commonly, wind turbines are fixed to the ground and can only reach heights of up to 125 meters. There are also issues with the consistency of the wind speeds and direction at these heights. Wind turbines installed at these heights do not produce as much power as they could due to the inconsistency of the winds. The goal of this project was to determine a way to elevate the turbines up to heights of 300 meters using a lighter than air structure. At this altitude, the wind speeds are more constant and the direction of the wind does not vary. With these two factors significantly improved, the turbines operate at their maximum potential. Many steps were involved to reach these goals. -
Kitesurfing a - Z
Kitesurfing A - Z A Airfoil (aerofoil): a wing, kite, or sail used to generate lift or propulsion. Airtime: the amount of time spent in the air while jumping. AOA, Angle of Attack: also known as the angle of incidence (AOI) is the angle with which the kite flies in relation to the wind. Increasing AOA generally gives more lift. AOI, Angle of Incidence: angle which the kite takes compared to the wind direction Apparent wind, AW: The wind felt by the kite or rider as they pass through the air. For instance, if the true wind is blowing North at 10 knots and the kite is moving West at 10 knots, the apparent wind on the kite is NW at about 14 knots. The apparent wind direction shifts towards the direction of travel as speed increases. Aspect Ratio, AR: the ratio of a kites width to height (span to chord). Kites can range between a high aspect ratio of about 5.0 or a low aspect ratio of about 3.0. AR5: The legendary first 4 line inflatable kite manufactured by Naish. ARC: a foil kite manufactured by Peter Lynn B Back Loop: a kitesurfing trick where the kiter rotates backward (begins by turning their back toward the kite) while throwing his/her feet above the level of his/her head. Back Roll: same as a back loop but without getting their feet up high. Batten: a length of carbon or plastic which adds stiffness or shape to the kite or sail. Bear Away / Bear Off: change your direction of travel to a more downwind direction. -
Types of Stunt Kites
www.my-best-kite.com Table of Contents Introduction.............................................................................................................................6 Chapter format........................................................................................................................................ 6 A Tip For The Frugal............................................................................................................................... 6 STUNT KITES........................................................................................................................7 Delta, Diamond, Parafoil or Quad?.........................................................................................................7 Types Of Stunt Kites............................................................................................................................... 8 The Peter Powell Stunt Kite.......................................................................................................12 Classic Steerable Diamond Kite...........................................................................................................12 'Cayman' Peter Powell Stunt Kite.........................................................................................................12 A History: The Peter Powell Stunt Kite..................................................................................................13 Dual Line Parafoil Kites..............................................................................................................15 -
Design of a High Altitude Wind Power Generation System
A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science Design of a High Altitude Wind Power Generation System Imran Aziz Linköping University Institute of Technology Department of Management and Engineering Division of Machine Design Linköping University SE-581 83 Linköping Sweden 2013 ISRN: LIU-IEI-TEK-A--13/01725—SE Acknowledgements The work presented in this thesis has been carried out at the Division of Machine Design at the Department of Management and Engineering (IEI) at Linköping University, Sweden. I am very grateful to all the people who have supported me during the thesis work. First of all, I would like to express my sincere gratitude to my supervisors Edris Safavi, Doctoral student and Varun Gopinath, Doctoral student, for their continuous support throughout my study and research, for their guidance and constant supervision as well as for providing useful information regarding the thesis work. Special thanks to my examiner, Professor Johan Ölvander, for his encouragement, insightful comments and liberated guidance has been my inspiration throughout this thesis work. Last but not the least, I would like to thank my parents, especially my mother, for her unconditional love and support throughout my whole life. Linköping, June 2013 Imran Aziz i Abstract One of the key points to reduce the world dependence on fossil fuels and the emissions of greenhouse gases is the use of renewable energy sources. Recent studies showed that wind energy is a significant source of renewable energy which is capable to meet the global energy demands. However, such energy cannot be harvested by today’s technology, based on wind towers, which has nearly reached its economical and technological limits. -
Multicopter-Based Launching and Landing of Lift Power Kites
Chapter 19 Multicopter-Based Launching and Landing of Lift Power Kites Florian Bauer, Christoph M. Hackl, Keyue Smedley and Ralph M. Kennel Abstract Crosswind kite power is a promising alternative wind power technology. However, unlike the rotor blades of a conventional wind turbine, a kite needs to be launched prior to power generation and needs to be landed during low-wind con- ditions or for maintenance. This study proposes multicopter-based concepts for an autonomous solution. Basic system components and different system configurations are discussed. Static and dynamic feasibility analyses are carried out. Results show that such systems are feasible and have advantages compared to other launching and landing concepts. However, also the weaknesses of such systems become apparent e.g. the increased airborne mass. 19.1 Introduction Crosswind kite power is becoming more and more attractive in both academia and industry (see e.g. [2,8, 31] and references therein) and is considered as promising alternative wind power technology: Compared to conventional wind turbines, kites can harvest wind power at higher altitudes with stronger and steadier winds, but Florian Bauer (B) Ralph M. Kennel Institute for Electrical· Drive Systems and Power Electronics, Technical University of Munich, Arcisstrasse 21, 81477 Munich, Germany e-mail: fl[email protected] Christoph M. Hackl Research Group “Control of renewable energy systems”, Munich School of Engineering, Tech- nical University of Munich, c/o Wind Energy Institute, Boltzmannstrasse 15, 85748 Garching, Germany Keyue Smedley The Henry Samueli School of Engineering, Power Electronics Laboratory, University of California, Irvine, CA 92697, USA 463 464 Florian Bauer, Christoph M. -
Free Chapters. Different Types of Kites Used
Cut Days Off Your Kitesurfing Learning Time And Save Hundreds On Your Lesson Costs - Free Chapters. First of all I’d like to congratulate you on taking your first steps into the world of kitesurfing. This is an exciting time and the journey you’re about to embark upon is a fun one. We wish you the best of luck in your adventures and if you do need anything at any point along the way feel free to drop us an email and just let us know how your doing or if your struggling with something to ask for a bit of advice, we’ll be only too happy to help! Good winds and good luck! ____________________________________________________________ Read The Full Book At: http://www.amazon.co.uk/Kitesurfing-Learning-Hundreds-Lessons-ebook/dp/B009E1IINC If you like it please be kind and leave us a 5 star review. ____________________________________________________________ Different Types Of Kites Used In Kite Sports. As far as we are concerned in power kiting, kitesurfing, snow kiting or land boarding/buggying there are, in essence, 2 different types of kites. Very briefly these are: The LEI Kite Leading Edge Inflatable (LEI) Kites - LEI simply means that the kite has an inflatable structure, any kite that needs to be pumped up is an LEI. This classification can be broken down into C, Bow, Hybrid and Delta style kites. www.TantrumKitesurf.com The Foil Kite Foil/Power kites - Foil kites look very similar to the wings used by parascender's and can be broken down into open and closed cell kites.