Initial Condensation Comparison of R-22 With R-134a and R-321R-125

Dobson, M.K.; Chato, J.C.; Wang, S.P.; Hinde, D.K.; Gaibel, J.A.

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https://hdl.handle.net/2142/9743 Copy

Description

Title

Initial Condensation Comparison of R-22 With R-134a and R-321R-125

Author(s)

• Dobson, M.K.
• Chato, J.C.
• Wang, S.P.
• Hinde, D.K.
• Gaibel, J.A.

Issue Date

1993-06

Keyword(s)

refrigerant-side evaporation condensation studies

Abstract

"Condensation heat transfer data are reported for R-22 and two potential replacements: R-134a, and a 60%/40%, azeotropic mixture of R-32 and R-125. All condensation data were collected in an 0.18"" ID (4.572 mm), smooth copper tube. The heat transfer data are compared directly with one another, as well as with heat transfer correlations developed within the ACRC for the wavy and the annular flow regimes. At constant mass flux, the heat transfer coefficients of the three refrigerants were nearly identical in both the annular and the wavy flow regimes. This agreed with predictions of the correlations. The pressure drop was highest for R-134a, followed by R-22 and R- 32/R-125. The condensation heat transfer correlations developed in the ACRC were found to fit the data quite well for each of the refrigerants."

Publisher

Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Air Conditioning and Refrigeration Center TR-41

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/9743

Sponsor(s)/Grant Number(s)

Air Conditioning and Refrigeration Center Project 01

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