TY - JOUR
T1 - Development of a variable water temperature control method for air source heat pump based on the supply–demand balance
AU - Sun, Yuying
AU - Li, Xintian
AU - Wei, Wenzhe
AU - Xue, Huiyu
AU - Wang, Wei
AU - Deng, Shiming
N1 - Funding Information:
This work was supported partially by the Beijing natural fund & municipal education commission cosponsored project (Grant No. KZ202010005003), and it is also a part of National Natural Science Foundation of China (51778009).
Publisher Copyright:
© 2022
PY - 2022/8
Y1 - 2022/8
N2 - Air source heat pump (ASHP) is one of renewable energy technologies, and has been widely used for space heating. In practice applications, the setting value of its supply water temperature is long-term fixed, resulting in the poor coefficient of performance (COP) under partial load conditions. To improve the COP of ASHP, a real-time variable water temperature (VWT) control method for its supply water temperature was proposed in this work. In this control method, the optimal supply water temperature was calculated based on the supply and demand balance, and used as the setting value of supply water temperature. Then using an ASHP-radiant floor heating system, the feasibility and energy-saving performance of the proposed control method were investigated through experiment and simulation. Results indicate that the ASHP heating system can run smoothly when adopting the proposed VWT control method. Compared with the results in constant water temperature (CWT) control method, in the whole heating season, the COP of ASHP unit in VWT control method is 22.88% higher, while the building heating energy consumption is 26.16% lower. Besides, the percentage of predicted mean vote (PMV) between − 0.5 and + 0.5 increases from 48.61% in CWT control method to 87.86% in VWT control method.
AB - Air source heat pump (ASHP) is one of renewable energy technologies, and has been widely used for space heating. In practice applications, the setting value of its supply water temperature is long-term fixed, resulting in the poor coefficient of performance (COP) under partial load conditions. To improve the COP of ASHP, a real-time variable water temperature (VWT) control method for its supply water temperature was proposed in this work. In this control method, the optimal supply water temperature was calculated based on the supply and demand balance, and used as the setting value of supply water temperature. Then using an ASHP-radiant floor heating system, the feasibility and energy-saving performance of the proposed control method were investigated through experiment and simulation. Results indicate that the ASHP heating system can run smoothly when adopting the proposed VWT control method. Compared with the results in constant water temperature (CWT) control method, in the whole heating season, the COP of ASHP unit in VWT control method is 22.88% higher, while the building heating energy consumption is 26.16% lower. Besides, the percentage of predicted mean vote (PMV) between − 0.5 and + 0.5 increases from 48.61% in CWT control method to 87.86% in VWT control method.
KW - Air source heat pump system
KW - Building clean heating
KW - Energy efficient
KW - Supply and demand balance
KW - Variable water temperature control method
UR - http://www.scopus.com/inward/record.url?scp=85131938534&partnerID=8YFLogxK
U2 - 10.1016/j.seta.2022.102366
DO - 10.1016/j.seta.2022.102366
M3 - Journal article
AN - SCOPUS:85131938534
SN - 2213-1388
VL - 52
JO - Sustainable Energy Technologies and Assessments
JF - Sustainable Energy Technologies and Assessments
M1 - 102366
ER -
