<abstract xmlns="http://www.w3.org/1999/xhtml">

Europe has a course to zero emissions by 2050, with a strong emphasis on energy sector. Due to climatic conditions in Latvia, district heating (DH) plays an important role in the energy sector. One of the solutions to achieve the set goals in DH is to introduce emission-free technology. Therefore, the popularity of installation of large-scale solar collector plants continues to increase in DH in Europe. The first large-scale solar collector field in the Baltic States was installed in 2019. Solar collector active area is 21 672 m2 with heat storage water tank 8000 m3. The article shows the first operation results of this system and evaluates influencing factors. The results of the analysis show that system productivity is mainly demanded by solar radiation, and the strongest correlation between these parameters were established in May. The highest correlation between ambient air temperature and produced thermal energy is reached when ambient air temperature is between 7 °C to 15 °C and production process has not been externally regulated. The temperature difference between flow and return temperatures of the heat carrier affect solar collector performance minimally and strong correlation was not observed.
</abstract>

Europe has a course to zero emissions by 2050, with a strong emphasis on energy sector. Due to climatic conditions in Latvia, district heating (DH) plays an important role in the energy sector. One of the solutions to achieve the set goals in DH is to introduce emission-free technology. Therefore, the popularity of installation of large-scale solar collector plants continues to increase in DH in Europe. The first large-scale solar collector field in the Baltic States was installed in 2019. Solar collector active area is 21 672 m2 with heat storage water tank 8000 m3. The article shows the first operation results of this system and evaluates influencing factors. The results of the analysis show that system productivity is mainly demanded by solar radiation, and the strongest correlation between these parameters were established in May. The highest correlation between ambient air temperature and produced thermal energy is reached when ambient air temperature is between 7 °C to 15 °C and production process has not been externally regulated. The temperature difference between flow and return temperatures of the heat carrier affect solar collector performance minimally and strong correlation was not observed.

Is It Possible to Obtain More Energy from Solar DH Field? Interpretation of Solar DH System Data

Environmental and Climate Technologies

This work is licensed under the Creative Commons Attribution 4.0 International License.

Europe has a course to zero emissions by 2050, with a strong emphasis on energy sector. Due to climatic conditions in Latvia, district heating (DH) plays an...

Is It Possible to Obtain More Energy from Solar DH Field? Interpretation of Solar DH System Data

Published Online: Dec 30, 2021

Page range: 1284 - 1292

DOI: https://doi.org/10.2478/rtuect-2021-0097

Keywords
District heating, large scale solar collector field, regression analyses

© 2021 Roberts Kaķis et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Is It Possible to Obtain More Energy from Solar DH Field? Interpretation of Solar DH System Data

Published Online: Dec 30, 2021

Page range: 1284 - 1292

DOI: https://doi.org/10.2478/rtuect-2021-0097

KeywordsDistrict heating, large scale solar collector field, regression analyses

© 2021 Roberts Kaķis et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
District heating, large scale solar collector field, regression analyses