Thermodynamics
; Construction & Building Technology
; Engineering, Mechanical
WOS研究方向:
Thermodynamics
; Construction & Building Technology
; Engineering
英文摘要:
In this study, the heat transfer coefficient (HTC) and pressure drop of the new low global warming potential refrigerant mixture R1123/R32 (40/60 mass%) in a 6.0 mm OD horizontal microfin tube during condensation at 40 degrees C and evaporation at 10 degrees C are experimentally quantified. The data are then compared to the component R32. Both the condensation HTC and pressure drop of R1123/R32 (40/60 mass%) are somewhat lower than those of R32. Similarly, the pressure drop of R1123/R32 during the evaporation process at 10 degrees C is somewhat lower than that of R32. However, the evaporation HTC is comparable to that of R32. The lower surface tension of R1123/R32 can enhance the nucleate boiling and compensate the heat transfer degradation due to the volatility difference.
Nagasaki Univ, Grad Sch Engn, 1-14 Bunkyo Machi, Nagasaki 8528521, Japan
Recommended Citation:
Kondou, Chieko. Heat transfer and pressure drop of R1123/R32 (40/60 mass%) flow in horizontal microfin tubes during condensation and evaporation[J]. SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT,2019-01-01