Thermal performance of solar district heating plants in Denmark

Simon Furbo, Bengt Perers, Federico Bava

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The market for solar heating plants connected to district heating systems is expanding rapidly in Denmark. It is expected that by the end of 2014 the 10 largest solar heating plants in Europe will be located in Denmark. Measurements from 23 Danish solar heating plants, all based on flat plate solar collectors mounted on the ground, shows measured yearly thermal performances of the solar heating plants placed in the interval from 313 kWh/m² collector to 493 kWh/m² collector with averages for all plants of 411 kWh/m² collector for 2012 and 450 kWh/m² collector for 2013.
Theoretical calculations show that for temperature levels higher than about 55°C the thermal performance of a solar collector field based on concentrating tracking solar collectors is higher than the thermal performance of a solar collector field based on flat plate collectors.
It is estimated that there are potentials for further improvements of the cost/performance ratio for solar collector fields, both with flat plate collectors and with concentrating tracking solar collectors.
It is recommended to continue monitoring and analysis of all large solar heating plants to document the reliability of the solar heating plants. It is also recommended by parallel theoretical and experimental approach to investigate in detail the thermal performance of differently designed solar collector fields in such a way that their thermal performance can be determined by theoretical calculations in the future. This will be useful in connection with development of improved solar collectors for solar heating plants and in connection with optimization of future solar heating plants.
Furthermore, it is recommended to continue the development of long term heat stores for solar heating plants and to elucidate how best to integrate solar heating systems in the future energy system.
Original languageEnglish
Title of host publicationProceedings of Eurosun 2014
Number of pages10
Publication date2014
Publication statusPublished - 2014
EventEuroSun 2014: International conference on solar energy and buildings - Aix-les-Bains Congress Center, Aix-les-Bains, France
Duration: 16 Sep 201419 Sep 2014


ConferenceEuroSun 2014
LocationAix-les-Bains Congress Center
Internet address


  • Solar heating plants
  • Solar collector fields
  • Flat plate collectors
  • Concentrating tracking collectors
  • District heating systems
  • Thermal performance
  • Measurements
  • Calculations

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