Denmark: 52,500 m2 additional collector area in Vojens
Submitted by Baerbel Epp on May 31, 2015
Since 2012, Vojens Fjernvarme has been a satisfied customer of a solar district heating installation. The experiences made with the 17,000 m2 large collector field convinced the municipal utility from the south of Denmark to plan adding another 52,500 m2 (36.75 MWth) to the field as well as seasonal storage, which should increase the annual solar share from the 14 % measured in 2014 to an expected 45 %. The photo shows the new fields with a total of 36.75 MWth on the left and the old field with 12.25 MWth on the right. The seasonal storage is situated on the top left of the photo with a triangle form is was not yet filled when the photo was taken.
Photo: Arcon-Sunmark
Grid temperatures have been set low to match the solar feed-in – they are 75 °C/37 °C and 77 °C/40 °C in summer and winter, respectively. Arcon-Sunmark sees solar heat prices, including seasonal storage, at 47 EUR/MWh, compared to heat prices of 57 EUR/MWh for natural gas supply, as natural gas taxation has been at 0.0295 EUR/m3. Hence, the megawatt plant is a purely commercial project, which has not been supported by direct subsidies. The installation was commissioned Mid May 2015 and officially inaugurated on 12 June 2015.
Name of Project / installation site |
Vojens Fjernvarme |
Country |
Denmark |
Start of operations |
Mid May 2015 |
Application |
District heating |
Gross collector field size |
36.75 MWth / 52,500 m² installed in 2014, 12.25 MWth / 17,500 m2 installed in 2012 |
Seasonal storage size |
Water-filled basin with 203,000 m3 |
Supplied process / network |
Supply of 2,000 households as well as ten schools and industries |
Specific solar yield per year |
400 kWh/m2 |
Predicted solar share |
45 % with the total thermal capacity of 49 MWth |
Customer / operator |
Vojens Fjernvarme, Denmark |
Planning / construction / commissioning |
Ramboll, Denmark |
Manufacturer of seasonal storage tank |
GSE Lining Technology, Germany |
Manufacturer of collectors |
Arcon Sunmark, Denmark |
Contact |
Vojens Fjernvarme A.M.B.A. Phone: +45 74 54 29 01 |
More information |