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Pressure drop of low GWP refrigerant mixture of R1234yf and R32 inside small diameter horizontal microfin tube.

Number: 2272

Author(s) : UBUDIYAH H., MAINIL A. K., SADAKATA K., KARIYA K., MIYARA A.

Summary

The use of R32, which has a GWP of 675 and an ODP of 0, is increasing. However, the GWP of R32 is not low enough to satisfy the Kigali amendment, though the GWP is relatively lower than other HFCs. On the other hand, research attention has been focused on R1234yf because its thermophysical properties are close to R134a and its GWP is lower than 1. But, due to its limited thermophysical properties, R1234yf is not a suitable replacement for R32. One solution is to use refrigerant combinations with a lower GWP and higher performance, such as R1234yf and R32. This paper showed the pressure drop characteristics of the low GWP zeotropic refrigerant mixture R1234yf/R32 inside a horizontal microfin tube (equivalent diameter of 3.18 mm). The experiments were carried out at saturation temperatures of 20°C and 30°C, vapor quality ranging from 0 to 1, and mass velocity ranging from 50 kg m-2s-1 to 200 kg m-2s-1. The effect of saturation temperature, vapor quality, and mass velocity on pressure drop was presented. Along with mass velocity and vapor quality increments, the pressure drops of refrigerant mixtures increased. In contrast, the pressure drop decreased along with the increase in saturation temperature. The measured pressure drop was compared to a correlation.

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  • Original title: Pressure drop of low GWP refrigerant mixture of R1234yf and R32 inside small diameter horizontal microfin tube.
  • Record ID : 30030638
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022

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