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Simulation study on the system performance of solar-ground source heat pump using return water of the district heating network as supplementary heating

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  • Meng, Zhaofeng
  • Huo, Ziheng
  • Dong, Suiju
  • Liu, Yin
  • Zhai, Saina
  • Ding, Chuangchuang
  • Hu, Ke
  • Yang, Jingxing
  • Han, Weinan

Abstract

In order to mitigate the extreme climate change and improve the utilization of renewable resources, a solar-ground source heat pump system using return water of the district heating network as supplementary heating(SGSHP-DHNSH)has been proposed. This system compared with parallel and series connections of solar assist ground source heat pump systems for simulation and analysis. The results indicate that the SGSHP-DHNSH system raises the evaporation temperature, demonstrates a high rate of renewable energy utilization, and efficiently stores heat within the buried pipes. Notably, the soil temperature in the SGSHP-DHNSH system experiences only a 0.16 °C decrease, which represents reductions of 8 % and 9.8 % compared to the series and parallel systems, respectively. Furthermore, the system COP demonstrates a commendable improvement of 20 % and 13.7 %, the evaporator inlet temperature is higher than the series and parallel systems by 6.7 °C and 5.3 °C, respectively. Moreover, the total energy consumption throughout the heating season stands at 63 MW h, reflecting a substantial 24 % and 19 % reduction in comparison to the series and parallel systems, respectively. The SGSHP-DHNSH system plays a crucial role in improving the utilization rate of renewable resources and alleviating the soil heat imbalance caused by ground source heat pump operation.

Suggested Citation

  • Meng, Zhaofeng & Huo, Ziheng & Dong, Suiju & Liu, Yin & Zhai, Saina & Ding, Chuangchuang & Hu, Ke & Yang, Jingxing & Han, Weinan, 2024. "Simulation study on the system performance of solar-ground source heat pump using return water of the district heating network as supplementary heating," Renewable Energy, Elsevier, vol. 231(C).
    • Handle: RePEc:eee:renene:v:231:y:2024:i:c:s0960148124009741
    DOI: 10.1016/j.renene.2024.120906
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    References listed on IDEAS

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