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ACRC Technical Report 141PDF


Title:Experimental Investigation of Void Fraction During Horizontal Flow in Smaller Diameter Refrigeration Applications
Author(s):Yashar, D.A.
Contributor(s):Newell, T.A.; Chato, J.C.
Subject(s):void fraction
Abstract:Void fractions were detennined for Refrigerants l34a and 4l0A evaporating inside three different tubes during horizontal flow. These tubes are as follows: a smooth 4.26 mm i.d. tube, a 7.25 mm axially grooved tube, and a 7.26 mm 18° helically grooved tube. Tests that encompass a range of mass fluxes of 75 - 700 k~, inlet qualities of 0.10 - ms kW 0.80, and heat fluxes of 0 - 10 -2 were performed at a temperature of 5° C. The m experimental apparatus and procedures are described. The predictions of several existing correlations are compared to the data, and recommendations as to which correlations are best suited for particular applications are given. Also, adjustments to these correlations are recommended for special geometries, and for simplicity of use.
Issue Date:1998-07
Publisher:Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Air Conditioning and Refrigeration Center TR-141
Genre:Technical Report
Sponsor:Air Conditioning and Refrigeration Project 74
Date Available in IDEALS:2009-05-21
Identifier in Online Catalog:4158179

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