TY - JOUR
T1 - Development of evaluation indexes for assessing the regional operating performances of air source heat pump (ASHP) units operated in different climate regions based on the equivalent temperature drop method
AU - Wu, Yong
AU - Wang, Wei
AU - Sun, Yuying
AU - Cui, Yiming
AU - Lin, Yao
AU - Deng, Shiming
N1 - Funding Information:
This work was supported partially by the Young Top-notch Talents Team Program of Beijing Excellent Talents Funding (2017000026833TD02) and the Beijing natural fund & municipal education commission co-sponsored project (Grant No. KZ202010005003).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/9/15
Y1 - 2021/9/15
N2 - During the actual operation of an ASHP unit installed in different climate regions, ambient operating conditions can vary constantly over an entire heating season, thus the actual output heating capacity of ASHP units may vary significantly from region to region. To enable a convenient evaluation of output heating capacity of a space heating ASHP unit installed in different climate regions, regional performance evaluation indexes including Ta′¯, HERR(Ta’), βTa and βRH based on ETD method have been developed. These evaluation indexes are generalized and can be used to evaluate the regional performance of ASHP units operated in any regions. It can also be used to specify the key factors affecting the operating performances of ASHP units in different regions. With the developed evaluation indexes, the regional operating performances of ASHP units installed in 278 Chinese cities were evaluated. The results demonstrated that the total output heating energy for ASHP units operated in Southern Chinese provinces may be lower than those in Northern China. In Shanghai, Ta′¯ at −6.0 °C is lower than that at −3.0 °C in Beijing, suggesting the total output heating energy from an ASHP units operated in Shanghai over an entire heating season would be lower than that in Beijing. Furthermore, in southern Xinjiang and northern Fujian Provinces, the total output heating energy from ASHP units may be higher than those operated at the nominal condition. In addition, in Tibet, Beijing, Liaoning, etc., the total output heating energy from the ASHP units would be affected more by Ta, thus ASHPs’ manufacturers are recommended to develop ASHP units suitable for operation in low temperature ambient. In most regions in southern China, RH would affect more on the total output heating energy from the ASHP units, thus ASHPs’ manufacturers are recommended to develop ASHP units having frosting suppression provisions and accurate defrosting measures.
AB - During the actual operation of an ASHP unit installed in different climate regions, ambient operating conditions can vary constantly over an entire heating season, thus the actual output heating capacity of ASHP units may vary significantly from region to region. To enable a convenient evaluation of output heating capacity of a space heating ASHP unit installed in different climate regions, regional performance evaluation indexes including Ta′¯, HERR(Ta’), βTa and βRH based on ETD method have been developed. These evaluation indexes are generalized and can be used to evaluate the regional performance of ASHP units operated in any regions. It can also be used to specify the key factors affecting the operating performances of ASHP units in different regions. With the developed evaluation indexes, the regional operating performances of ASHP units installed in 278 Chinese cities were evaluated. The results demonstrated that the total output heating energy for ASHP units operated in Southern Chinese provinces may be lower than those in Northern China. In Shanghai, Ta′¯ at −6.0 °C is lower than that at −3.0 °C in Beijing, suggesting the total output heating energy from an ASHP units operated in Shanghai over an entire heating season would be lower than that in Beijing. Furthermore, in southern Xinjiang and northern Fujian Provinces, the total output heating energy from ASHP units may be higher than those operated at the nominal condition. In addition, in Tibet, Beijing, Liaoning, etc., the total output heating energy from the ASHP units would be affected more by Ta, thus ASHPs’ manufacturers are recommended to develop ASHP units suitable for operation in low temperature ambient. In most regions in southern China, RH would affect more on the total output heating energy from the ASHP units, thus ASHPs’ manufacturers are recommended to develop ASHP units having frosting suppression provisions and accurate defrosting measures.
KW - ASHP
KW - Evaluation indexes
KW - Heating Energy Reduction Rate
KW - Regional climate
KW - Regional operating performances
UR - http://www.scopus.com/inward/record.url?scp=85107828735&partnerID=8YFLogxK
U2 - 10.1016/j.enbuild.2021.111111
DO - 10.1016/j.enbuild.2021.111111
M3 - Journal article
AN - SCOPUS:85107828735
SN - 0378-7788
VL - 247
JO - Energy and Buildings
JF - Energy and Buildings
M1 - 111111
ER -
