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Solar combined with heat pumps in Denmark
The development of solar district heating in Denmark takes a new step: the first solar district heating plant combined with heat pump is being planned in Rye.

 

A lot of small Danish CHP plants have until now implemented solar thermal district heating as it was nearly the only economical feasible legal way to replace natural gas. But from January 2013 electricity taxes for heat pump electricity have been reduced and now several small CHP plants plan to install heat pumps together with solar district heating. The concept is that the heat pumps will run in periods with low market prices for electricity (typically winter nights). The first plant is planned at Rye CHP (administrated by Braedstrup District Heating). It will use ground water as heat source and is planned to be implemented in spring 2014 together with 2400 m² solar collectors. The heat pump is deliberately oversized (2 MW heat or 75 % of peak load) making it possible to cover 50-60 % of the heat consumption with approx. 3000 running hours in periods with surplus electricity. The coefficient of performance of the heat pump is expected to be 4.0. The project is supported by the Danish EUDP (Energy Technology Development and Demonstration Programme).

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