For Sustainable Power and Heating
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Our Fuels For sustainable power and heating. VÄSTERÅS CHP PLANT MÄLARENERGI An infraservice company Mälarenergi’s products and services are at the core of the fundamental functions of society, such as energy-, water- and broadband solutions. We have a wide range of services We build that provide crucial to individuals, organizations, companies and all citizens. the future Mälarenergi is the main provider of electricity, district together heating, water and broadband in the city of Västerås. We also provides services in the Mälardalen region and trade ” electricity to individuals and companies all over Sweden. Mälarenergi was established in 1861. We make the future together involve not just us, but also contribute For more than 150 years Mälarenergi to our customers sustainability and have contributed to the development of community involvement. society. And we will continue to do so. For us, sustainability means: Mälarenergi began supplying Västerås • Production with respect for the residents with district heating as early environment. as 1954. Today, the district heating grid • Fresh and clean drinking water. covers about 900 kilometres and the • Reliable infraservice without inter- CHP plant (Combined Heat and Power) ruptions. supplies 98 % of the properties in the • Social responsibility. About Mälarenergi city centre with district heating. In addi- To reduce climate impact we take conti- tion the plant also supplies nearby cities. Owner: The municipality of Västerås To meet the demands of the future, we nuous sustainable action by: Turnover: ~300 million Euro develop new infraservice solutions for a • A high degree of district heating in more sustainable society. District hea- Västerås (connects 98 % of all hou- Number of employees: appr. 750 ses in Västerås). ting reduces the negative environmental Head office: Västerås impact which in turn strengthens the • High efficiency through simultaneous customer's environmental profile. In that production of electricity and heat. CEO: Niklas Gunnar way our everyday business activities • Energy recycling using waste as fuel. BUSINESS IDEA We create the prerequisites for a comfortable life and growth of Mälardalen, by offering people sustainable and secure infraservice all hours of the day. VISION Everyone thrives and develop in a viable Mälardalen. City of Västerås Business area Heat and Power Turnover: ~140,66 million Euro Sales heating: 1 538 GWh Sales cooling: 27 GWh Production electricity: 565 GWh (incl. 180 GWh recovered by hydroelectric and 385 GWh recove- red by HCP) District heating pipe: 869 km District cooling pipe: 15 km Customers heating: 15 000 Customers cooling: 72 Investments: 25,7 millon Euro Number of employees: 265 Area manager: Magnus Eriksson BA Heat & Power Renewal of the CHP plant in Västerås. The business area Heat and Power at Mälarenergi produce heat, remote cooling and electricity with cogeneration and hydropower. Our cogeneration plant from 1963 is the The older boilers 1 to 4 are reaching the which will make our production almost largest in northern Europe and provides end of their technological and economic entirelly based on recycled fules, will district heating to 98 % of the buildings in lifespan and will be replaced in the near secure a reliable supply of electricity and the city of Västerås, as well as to the sur- future. The renewal process started in heat for a long time to come. It enable us rounding communities Hallstahammar, 2014 with the commission of Unit 6 to stop using fossil fuels and in the same Kolbäck, Skultuna, Surahammar, Tillberga (boiler, flue gas treatment, turbine and time create conditions for competitive and Barkarö. Mälarenergi also has a small generator) and a unique facility for fuel district heating prices. district heating plant in Kungsör. preparation. Together they constitute 1 We renewing the hole CHP plant the largest waste to energy facility in Goal – Business area the world. Combined with our latest in- Although we have reduced the emis- Heat & Power vestment, the new Unit 7, which is under sions of fossil carbon dioxide by 50 % in Year 2020 we have ceased construction right now and scheduled the last 15 years, we still strive onwards. using fossil fuels and only use to be completed in 2020, the two units Right now we renewing the hole produc- renewable and recycled fuels in the will cover about 86 % of the total heat tion capacity. Our goal is to completely production of heat and electricity. production in Västerås. The investment, stop our use of fossil fuels. Skultuna Surahammar Tillberga Hallstahammar Västerås Kolbäck Barkarö 15Fjärrvärmeledning 000 customers connected by 900 kilometres of district heating pipes. Our grid Västerås CHP plant provide district heating to 98 % of the houses in Västerås as well as the surrounding communities of Hallsta- hammar, Kolbäck, Skultuna, Surahammar, Tillberga and Barkarö. Through continuous work with quality, investments in the CHP plant and district heating grid, and with professional operation and maintenance, we An intricate secure the delivery for our customers. A reliable supply of heat and power web of district enables the customer to focus on their own core business. heating pipes connects 98 % of all houses in Västerås. The fuel factory and Unit 6 The largest waste to energy facility in the world. The first stage in the renewal of the CHP plant in Västerås was the commission of a new fuel factory and production unit, Unit 6. A flexible facility offering numerous options. A renewal process started in 2014 with to be adapted to ensure fuel supply to the around 6 days. The annual production the commision of Unit 6 (boiler, flue gas boiler. When the waste reaches the fuel capacity of RDF is a remarkable 450 000 treatment, turbine and generator) and a preparation unit it's crushed into small tons. This equals the amount of waste unique facility for fuel preperation – fragments so that the unsolicited materi- annually created by one million people. In a fuel factory. Today Unit 6 is the main al, such as metal, glass and stone, can be addition to the fuel preparation facility, a production unit and covers alone about separated out. The fuel is then mixed and storage facility for baled imported fuel is 50 % of the heating production capacity. stored in an RDF (Refuse Derived Fuel) used as a buffer. This storage facility can The boiler uses about 60 tonnes of fuel bunker before being transported to the accommodate around 7 shiploads of ba- per hour, which is equivalent to around boiler for inceneration. When the bunkers led fuel. All the fuel is received, processed three full truckloads. The reception, are full, they contain enough fuel to keep and stored indoors to minimise spreading preparation and storage processes need the boiler operating at full capacity for of odour and litter. Facts about Unit 6 Construction year: 2014 Capacity (effect) of 50 MW electricity and 130 MW heat. Annual production 900 GWh heat and 320 MWh electricity. Reduces fossil carbon dioxide emis- sions by about 300 000 tones/year. Boiler temperature >850 degrees C. Advances technology for flue gas treatment. The fuel factory Construction year: 2014 Capacity of 450 000 tons SRF/RDF Waste receiving bunker and ready fuel bunker have a storage capacity of 15 000 cubic meter each. Three waste processing lines for fuel preparation including process infeed hopper, shredder and steps to sort out fine and heavy fraction, metal and other rough materials. Renewal - stage 2 Production capacity without fossil fuels. If the first stage was Unit 6, the second step are the completion of Unit 7 – renewal stage 2. Unit 7 enables Mälarenergi to phase out the older units 1 to 4 and altogether stop using fossil fuels. As well as create the right conditions for future competitive district heating prices. Unit 7 (boiler, gas treatment unit, Unit 7 will recover energy from approx- wood will come from building construc- turbine and generator) will have a CFB imately 200 000 tons recycled waste tion such as molding, or from demolition boiler (Circulating fluidized bed) similar to wood per year. Waste wood materials left of old buildings. Up to 10 % of the fuel may Unit 6. It's a preferred technology due to by households or individuals for recycling. be impregnated wood classified as hazar- boiler flexibility, high steam capacity and And industry waste, such as pallets and dous waste. All of the recycled wood will good environmental data. used packaging materials. Parts of the be crushed or chipped before combustion. Here is the new unit built Fuel preparataion and storage Boiler Gas treatment unit Facts about Unit 7 Turbine and generator Boiler capacity 150 MWth High efficiency (> 90 %) with ability to flue-gas humidification and condensation. Steam turbine and generator with capacity up to 55 MW. Similar to Unit 6. Flue gas cleaning – combined wet and dry flue gas cleaning with subsequent flue- gas condensation. In the dry step, use of hydrated lime (CaCO3) together with active carbon. Condensate purification by means of Commissioning membrane technology (reverse osmosis). Final adjustments, tests on completion and per- formance tests during 2019. Mälarenergi puts 2020 Unit 7 into ordinary production in February 2020. Production in 2020 When the older units 1 to 4 are phased out 745 MW heat and 300 MW electric capacity will be lost. Unit 6 and 7 add about 120 MW heat and 50 MW electric capacity each. The renewed CHP plant will thus be a considerably smaller facility in 2020. B C A E D F Illustration of the CHP plant in Västerås A Unit 1 and 2 C Unit 4 E Unit 6 The heat and power plant’s oldest production In service since 1973 and is now taken out of Built and in operation from 2014. It contains a units were built 1963. They were converted from operation.