TY - JOUR
T1 - Performance comparison of heat pumps using low global warming potential refrigerants with optimized heat exchanger designs
AU - Kim, Byeongsu
AU - Lee, Sang Hun
AU - Lee, Dong Chan
AU - Kim, Yongchan
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/5/5
Y1 - 2020/5/5
N2 - The objective of this study is to analyze the performance improvement of heat pumps with low global warming potential (GWP) refrigerants over conventional R-410A heat pumps by optimizing the heat exchanger designs. A simulation model is developed for heat pumps with low GWP refrigerants and validated by comparing the predicted and measured data for R-410A and R-32. Based on the developed model, the diameter of the tube and the number of paths in the indoor and outdoor heat exchangers are optimized for each alternative refrigerant using the genetic algorithm. The performances of the optimized heat pumps with the low GWP refrigerants are compared with that of the R-410A heat pump to provide a selection guide for alternative refrigerants. The average performance improvements of the heat pumps with optimized heat exchanger designs were estimated to be 6.0%, 3.4%, and 2.4% for R-32, DR-5, and L-41a, respectively, compared with that of the baseline system. Thus, the R-32 heat pump delivered the highest performance improvement with the optimized heat exchanger designs.
AB - The objective of this study is to analyze the performance improvement of heat pumps with low global warming potential (GWP) refrigerants over conventional R-410A heat pumps by optimizing the heat exchanger designs. A simulation model is developed for heat pumps with low GWP refrigerants and validated by comparing the predicted and measured data for R-410A and R-32. Based on the developed model, the diameter of the tube and the number of paths in the indoor and outdoor heat exchangers are optimized for each alternative refrigerant using the genetic algorithm. The performances of the optimized heat pumps with the low GWP refrigerants are compared with that of the R-410A heat pump to provide a selection guide for alternative refrigerants. The average performance improvements of the heat pumps with optimized heat exchanger designs were estimated to be 6.0%, 3.4%, and 2.4% for R-32, DR-5, and L-41a, respectively, compared with that of the baseline system. Thus, the R-32 heat pump delivered the highest performance improvement with the optimized heat exchanger designs.
KW - Alternative refrigerant
KW - Heat exchanger design
KW - Heat pump
KW - Low GWP
KW - Performance improvement
UR - http://www.scopus.com/inward/record.url?scp=85080047252&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2020.114990
DO - 10.1016/j.applthermaleng.2020.114990
M3 - Article
AN - SCOPUS:85080047252
SN - 1359-4311
VL - 171
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
M1 - 114990
ER -