TY - JOUR
T1 - Performance analysis of air source heat pump space heating system with an adaptive control for supply water temperature
AU - Sun, Yuying
AU - Chen, Xu
AU - Wu, Shangjiang
AU - Wei, Wenzhe
AU - Wang, Wei
AU - Deng, Shiming
N1 - Funding Information:
This work was supported partially by the Beijing natural fund & municipal education commission co-sponsored project (Grant No. KZ202010005003 ), and it is also a part of National Natural Science Foundation of China ( 51778009 ).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/7/5
Y1 - 2022/7/5
N2 - Air source heat pumps (ASHPs) have been widely used for heating in buildings. While in practice, the setting value of its supply water temperature is always far higher than the theoretical value owing to the delayed regulation, and this results in the low coefficient of performance. To solve this problem, an adaptive control method for the supply water temperature was proposed in present work. This control method could predict the best setting value of supply water temperature based on the heat-balance of the heat exchange amount in indoor fan-coils and building heating load, and the least squares method was used to achieve the adaptive identification of parameters. By adopting this control method in a field ASHP system, four sets of experiments were conducted. Results showed that this control method could quickly and accurately adapt to the actual project, and adjust the water temperature according to heating demand. When employing the new control method, the average supply water temperature was reduced by 8.4 °C, and lower supply water temperature made the coefficient of performance of ASHP unit increased by 21.16%; the building energy consumption was reduced by 34.24%, and the power consumption of the ASHP unit was reduced by 38.20%.
AB - Air source heat pumps (ASHPs) have been widely used for heating in buildings. While in practice, the setting value of its supply water temperature is always far higher than the theoretical value owing to the delayed regulation, and this results in the low coefficient of performance. To solve this problem, an adaptive control method for the supply water temperature was proposed in present work. This control method could predict the best setting value of supply water temperature based on the heat-balance of the heat exchange amount in indoor fan-coils and building heating load, and the least squares method was used to achieve the adaptive identification of parameters. By adopting this control method in a field ASHP system, four sets of experiments were conducted. Results showed that this control method could quickly and accurately adapt to the actual project, and adjust the water temperature according to heating demand. When employing the new control method, the average supply water temperature was reduced by 8.4 °C, and lower supply water temperature made the coefficient of performance of ASHP unit increased by 21.16%; the building energy consumption was reduced by 34.24%, and the power consumption of the ASHP unit was reduced by 38.20%.
KW - Adaptive control method
KW - Air source heat pump
KW - Building energy saving
KW - Variable water temperature
UR - http://www.scopus.com/inward/record.url?scp=85127346659&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2022.118401
DO - 10.1016/j.applthermaleng.2022.118401
M3 - Journal article
AN - SCOPUS:85127346659
SN - 1359-4311
VL - 211
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
M1 - 118401
ER -
