In 2017 the amount of new SDH dropped with about 80 MW compared with 2016, and the total new installed SDH net capacity was 159 MW. This drop was mainly due to the end of an approximately 10% subsidy scheme at the end of 2016. Contact online >>
In 2017 the amount of new SDH dropped with about 80 MW compared with 2016, and the total new installed SDH net capacity was 159 MW. This drop was mainly due to the end of an approximately 10% subsidy scheme at the end of 2016.
In 2019 138 MW new SDH capacity was installed.
The market for individual systems has been at a low level, in the range of 2 - 10 MW/year for the last 10 years, with a downward trending market.
The above numbers are based on data from The Danish Energy Agency.
In the period 2021 to 2022, only 2 systems with a total of 10,677 m2 have been installed.
In 2022, a total of 1,607,015 m2 of solar collectors with a capacity of 1,125 MWth have been installed in Denmark.
In 2023 there are plans to expand one plant and build 2 new solar plants. A total of 11,910 m2 of solar collectors with a capacity of 8.3 MWthare planned.
The spike in electricity prices seen in 2022 has made it clear how the solar thermal heating supply not only provides a low-cost heat, but also helps stabilize the overall heat price. This may represent an increasingly important argument for solar thermal.
From plants having a SDH system the feedback seems positive which is also seen from the interest in expanding their systems where possible. Many DH companies are extending their network connecting more customers to DH. Hence, their heat demand increases, several DH companies are interested in extending their SDH plant to again cover around 20% of the annual demand.
This may represent a small but not completely insignificant market in the coming years. However, in general the low-hanging fruits seem to have been picked in DK and presently there is no outlook towards a SDH market bouncing back.
The prices of HPs and electricity seems to have increased more than the cost of solar collectors so the balance may still tip in favour of SDH in the future. But it has to be more than “break even” compared to alternative options for SDH to be the most favourable solution and without seasonal storage the question of covering the rest of the demand remains for the DH companies even if they would be interested in SDH.
The typical applications are:
Flat plate large module collectors are by far the most common collector type used for district heat in Denmark. The collectors are typically installed on the ground in long rows connected in series. The solar heating system normally takes in the return water and heats it up to the desired forward flow temperature. All plants have the solar collectors mounted on the ground. Ground mount foundations can be concrete blocks, concrete foundations or steel foundations.
Typical performance of large solar collector fields in Denmark is approximately 450 kWh/m2/year. This corresponds to an efficiency of around 40%. [Technology Data - Energy Plants for Electricity and District heating generation].
For the large systems for district heating, the main market drivers are the relatively low and stable solar heat price. Heat from large solar fields is competitive with the heat price of gas and some kinds of biomass. And, heat pumps are now very competitive.
The small systems are not as competitive as the large systems, and over the past several years people seem more interested in PV systems.
Since the sale of ArconSunmark in 2020 to GreenOneTEc, there are no longer any manufacturers of large-scale solar collectors in Denmark.
The estimated employment related to the production and installation of solar heating systems in the record year 2016 was approximately 1,300 full time jobs. [According to calculation method given in Fakta om Solvarme, faktablad G07].
Costs of large systems for district heating:In the table below 2015 prices (excluding VAT) of different collector fields installed are seen. The prices include piping in the field, heat exchangers, pumps, control, etc.
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