Aalborg CSP received an order from the Danish utility and energy supply company SK Forsyning to deliver a 8 MWth solar heating plant consisting of flat solar-thermal collectors. The system is integrated with SK Forsyning's existing energy infrastructure - including a biomass boiler - for a more flexible energy supply.


Client:      SK Forsyning
End user/Owner:        SK Forsyning
Location:   Korsør/Halsskov, Denmark
Status:   Operational

Matching the client's energy needs with the right technology

The 11,733 m solar field, which is located in Halsskov near Korsør, consists of highly efficient double-glazed flat solar-thermal collectors capable of producing 6,500 MWh heat annually. The solar heating plant is  integrated with the district heating plant’s existing biomass boiler and is supplementing the delivery of energy to the plant’s existing customers in Korsør as well as the many future district heating customers in Halsskov.

In order for us to be able to provide our customers with a lower heating bill, while also contributing to the country’s clean energy transition, looking towards the sun was an obvious choice for us. Energy from the sun alone can annually account for 15 percent of our district heating production. It was therefore natural for us to incorporate the sun into our strategy” – says Carsten Lunde, Head of energy at SK Forsyning.

Renewable energy in full bloom on showcase

The 11,733 m² solar field consists of 74 rows of flat solar-thermal collectors with up to 38 panels per row from Aalborg CSP’s collaboration partner GREENoneTec.

The solution supplied to SK Forsyning is customized to fit the utility company's individual needs, which includes, among other things, a divided solar field. The solar heating system is divided in two in order to keep the right distance to a historic burial mound placed in the area surrounding the district heating plant. Aalborg CSP re-designed the entire solar field layout, piping, etc. to keep the necessary distance. As a result, the solar panels are located both north, south and west of the burial mound to make room for the necessary number of panels required for providing the desired amount of energy.

The many rows of solar collectors are placed on a field along the Danish E20 highway allowing thousands of people travelling across the Great Belt in Denmark to see renewable energy in full bloom. The solar heating has thus become a showcase for renewable energy, nationally as well internationally.

Combined with the district heating plant’s biomass boiler, the solar heating plant will provide cheap sustainable heating to 5,000 households in Korsør and Halsskov.

Shortly after signing the agreement with SK Forsyning, the construction work commenced in Korsør. Despite challenges with the layout of the solar field resulting in a complete re-design due to the nearby burial mound, the system was successfully handed over on budget and on time and went operational in the summer of 2019.



Client:SK Forsyning
Capacity of the plant:8 MWth
Annual energy production:6,500 MWh heat
No. of customers:5,000
Location:Korsør/Halsskov, Denmark
Area:11,733 m2
Plant layout:74 rows with up to 38 collectors in a row
Solar collector type:GREENoneTEC GK3003 series double glazed
Plant layout:74 rows with up to 38 collectors in a row
Expected system lifetime:25 years
CO2 savings:1,203 tons CO2 / year 

Project updates

Click through the pictures to see how the construction progresses in Halsskov near Korsør, Denmark. (The pictures are organized in chronological order, latest project updates appear first.)