| Title |
Experimental Comparison of Heat Transfer Coefficient and Frictional Pressure Drop of R-134a, R-1234yf, and R-1234ze(E) in a Brazed Plate Heat Exchanger |
| Authors |
Beomjun Kim ; Dongchan Lee |
| DOI |
https://doi.org/10.6110/KJACR.2024.36.9.429 |
| Keywords |
판형열교환기; 마찰압력강하; 열전달계수; 저GWP냉매 Brazed plate heat exchanger; Frictional pressure drop; Heat transfer coefficient); Low-GWP Refrigerant |
| Abstract |
This study experimentally compared and evaluated the heat transfer coefficient and frictional pressure drop characteristics of R-134a and its low-GWP alternative refrigerants (R-1234yf, R-1234ze(E)) in a plate heat exchanger. The experiments were conducted at various vapor qualities, different mass fluxes of 32, 45, and 58 kg m-2 s-1, heat transfer rates of 0.51, 0.65, and 0.7 kW, and saturation temperatures of 5, 10, and 15℃. Vapor quality and mass flux had significant effects on the heat transfer coefficient and pressure drop, whereas the heat transfer rate and saturation temperature had little impact. However, saturation temperature had a noticeable effect on pressure drop. In terms of heat transfer performance in a plate heat exchanger, R-1234yf showed the best characteristics among the tested refrigerants. |