TY - JOUR
T1 - R1234yf and R1234ze(E) as low-GWP refrigerants for residential heat pump water heaters
AU - Nawaz, Kashif
AU - Shen, Bo
AU - Elatar, Ahmed
AU - Baxter, Van
AU - Abdelaziz, Omar
N1 - Publisher Copyright:
© 2017
PY - 2017/10
Y1 - 2017/10
N2 - Owing to the growing concerns about the relatively high global warming potential (GWP) of current refrigerants, a serious effort is in progress to find lower-GWP substitutes. The hydrofluoroolefin (HFO)-based refrigerants R1234yf and R1234ze(E) are being considered for use in multiple heating, ventilation, air conditioning, and refrigeration applications because of their very low GWP. A study was conducted to model a residential heat pump water heater using these HFOs. A system model was calibrated using experimental data and the calibrated model was used to evaluate the potential of HFOs to replace R134a. A series of parametric analyses were used to investigate the impacts of condenser wrap pattern, condenser tube size, evaporator size, and heat loss factor from the storage tank. It has been shown that both R1234yf and R1234ze(E) can be substituted for R134a with comparable performance and no substantial modifications to the original system. This study presents a detailed feasibility analysis for successful replacement of high-GWP refrigerants with low-GWP refrigerants with acceptable performance.
AB - Owing to the growing concerns about the relatively high global warming potential (GWP) of current refrigerants, a serious effort is in progress to find lower-GWP substitutes. The hydrofluoroolefin (HFO)-based refrigerants R1234yf and R1234ze(E) are being considered for use in multiple heating, ventilation, air conditioning, and refrigeration applications because of their very low GWP. A study was conducted to model a residential heat pump water heater using these HFOs. A system model was calibrated using experimental data and the calibrated model was used to evaluate the potential of HFOs to replace R134a. A series of parametric analyses were used to investigate the impacts of condenser wrap pattern, condenser tube size, evaporator size, and heat loss factor from the storage tank. It has been shown that both R1234yf and R1234ze(E) can be substituted for R134a with comparable performance and no substantial modifications to the original system. This study presents a detailed feasibility analysis for successful replacement of high-GWP refrigerants with low-GWP refrigerants with acceptable performance.
KW - Alternative refrigerants
KW - Heat pump
KW - Hydrofluoroolefin
KW - Water heater
UR - http://www.scopus.com/inward/record.url?scp=85026886962&partnerID=8YFLogxK
U2 - 10.1016/j.ijrefrig.2017.06.031
DO - 10.1016/j.ijrefrig.2017.06.031
M3 - Article
AN - SCOPUS:85026886962
SN - 0140-7007
VL - 82
SP - 348
EP - 365
JO - International Journal of Refrigeration
JF - International Journal of Refrigeration
ER -