TY - GEN
T1 - Study on Feasibility of Accumulating Solar Energy into Soil for Improving the Imbalance of Heat Injection and Extraction in GHP System
AU - Liu, Kai
AU - Wang, Nan
AU - Cai, Wanlong
AU - Wang, Xinke
AU - Wang, Fenghao
AU - Xiao, Bo
N1 - Publisher Copyright:
© 2020, Springer Nature Singapore Pte Ltd.
PY - 2020
Y1 - 2020
N2 - Geothermal heat pump system (GHP) is efficient to utilize renewable energy in cooling and heating of building. However, the major problem is that the coefficient of performance (COP) of GHPs will decay after a long-time operation because of the imbalanced energy injection into and extraction from the ground. It is an effective way to apply solar collectors in the GHPs to collect thermal energy in the non-heating season and deliver the heat into ground, which may relief the imbalance. In our research, a demo project of solar-assisted geothermal heat pump system (SAGHP) in a rural building in Xi’an was built up, which delivers hot water from solar collector into soil from September 1 to November 14, 2018. For analyzing the effectiveness of elevating the ground temperature, a TRNSYS model was established, verified by the measured data in the project, and served for simulating three systems, which including the SAGHPs without accumulating solar energy in soil, the SAGHPs with accumulating thermal energy in soil in summer, and the SAGHPs with accumulating thermal energy in soil in autumn. The comparison of systems showed the significance of thermal storage in Xi’an and the feasibility of thermal injection in autumn for solar collection for improving the heat imbalance of GHPs.
AB - Geothermal heat pump system (GHP) is efficient to utilize renewable energy in cooling and heating of building. However, the major problem is that the coefficient of performance (COP) of GHPs will decay after a long-time operation because of the imbalanced energy injection into and extraction from the ground. It is an effective way to apply solar collectors in the GHPs to collect thermal energy in the non-heating season and deliver the heat into ground, which may relief the imbalance. In our research, a demo project of solar-assisted geothermal heat pump system (SAGHP) in a rural building in Xi’an was built up, which delivers hot water from solar collector into soil from September 1 to November 14, 2018. For analyzing the effectiveness of elevating the ground temperature, a TRNSYS model was established, verified by the measured data in the project, and served for simulating three systems, which including the SAGHPs without accumulating solar energy in soil, the SAGHPs with accumulating thermal energy in soil in summer, and the SAGHPs with accumulating thermal energy in soil in autumn. The comparison of systems showed the significance of thermal storage in Xi’an and the feasibility of thermal injection in autumn for solar collection for improving the heat imbalance of GHPs.
KW - Ground source heat pump
KW - Soil thermal storage
KW - Solar energy
KW - TRNSYS
KW - The rural buildings
UR - https://www.scopus.com/pages/publications/85082989102
U2 - 10.1007/978-981-13-9528-4_26
DO - 10.1007/978-981-13-9528-4_26
M3 - 会议稿件
AN - SCOPUS:85082989102
SN - 9789811395277
T3 - Environmental Science and Engineering
SP - 249
EP - 258
BT - Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning, ISHVAC 2019 - Volume III
A2 - Wang, Zhaojun
A2 - Wang, Fang
A2 - Wang, Peng
A2 - Shen, Chao
A2 - Liu, Jing
A2 - Zhu, Yingxin
PB - Springer
T2 - 11th International Symposium on Heating, Ventilation and Air Conditioning, ISHVAC 2019
Y2 - 12 July 2019 through 15 July 2019
ER -
