Biomass stations invest in solar heating

10 July 2018

Spring 2019 a new large-scale solar heating system will be completed in Hadsten. The installation will produce 12.000 MWh annually. The collector field will be 24.517 m2, and for the storage of the produced energy, a 6.000 m3 accumulation tank will be erected. Adjacent to the tank a 175 m2 technical building will be established, designed by Arkikon. As part of the solution, the installation is prepared for a 10.000 m2 extension equivalent to a capacity increase of approx. 40%. In the first phase, the solar heating system will cover 16% of the heat required by the users of Hadsten Heating Station, and the rest of the heating demand will be covered by biomass. Arcon-Sunmark is responsible for the complete project, and the construction work will begin in August.

“We look much forward to this project where we can make the most of our well-known and well-tested concept for integrating solar heating and biomass. That is one of reasons why we are able to start up right away, so that Hadsten may gain from the investment already next summer,” says Ole Dalby, CEO of Arcon-Sunmark.

Illustration of the new 175 m² technical building and 6.000 m³ storage tank of Hadsten Varmeværks

Biomass and solar heating are a perfect match

Earlier this year, Aabybro heating station initiated a similar solar heating project. Just as Hadsten, Aabybro is a biomass station, and further solar heating projects from other biomass plants are currently being tendered or on their way to be. According to Rambøll the biomass plants’ increased interest in solar heating has been encouraged by the fact that it makes sense and is economically viable to complement biomass with large-scale solar heating.

”Biomass and solar heating are a perfect match on several levels. From an investment point of view, solar heating is competitive with biomass. Biomass is currently experiencing a price increase, whereas with solar heating, the heating price is fix and known for many years to come. The recent Danish energy agreement does not change the fact that it is a good idea for biomass plants to establish a solar heating installation. Also when it comes to production and staffing, biomass and solar heating complement each other well, as the operation gains an increased flexibility,” so Flemming Ulbjerg, project manager and solar energy specialist with Rambøll.

As an investment, solar energy is competitive with biomass.

Future proofing the heat production

In an official statement from Hadsten Heating Station, the chairman Niels Jørgen Bärtel explains that there were two important reasons for deciding an investment this size. Primarily is was important to secure a minimal cost development for this part of the production for many years to come. Furthermore, it would be possible to achieve a completely sustainable heat production from the solar heating system.

”The electricity used to run a solar heating system in just a few years will be derived from green power generation, and thus there will be no emissions in connection with the operation. It is the declared aim of the board to be a weighty player in the efforts to achieve the national climate goals,” says Niels Jørgen Bärtel, chairman of Hadsten Heating Station.

About the solar heating installation in Hadsten:
• Start of construction: September 2018
• Expected commissioning: February 2019
• Aperture area: 24.517 m2
• Calculated annual production: 12.000 MWh
• Number of one-family houses’ annual consumption covered: 660 (standard house 18,1 MWh/year)
• Share of total heat consumption: 16% (the remainder is covered by biomass)
• Storage capacity: 6.000 m3 accumulation tank
• Service life: Minimum 25 years