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Journal of Enhanced Heat Transfer
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ISSN Druckformat: 1065-5131
ISSN Online: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v8.i1.10
pages 1-13

Brazed Aluminum Condensers for Residential Air Conditioning

Ralph L. Webb
Department of Mechanical Engineering The Pennsylvania State University, University Park, PA 16802, USA
Specialist in enhanced heat transfer and heat exchanger design
Hyunuk Lee
LG Electronics Inc., Changwon, Korea

ABSTRAKT

This paper provides an evaluation of the potential for use of brazed aluminum condensers in residential air-conditioning systems. Analysis was done to compare the performance of a brazed aluminum condenser with a presently used 2-row finned tube condenser having 7.0 mm diameter tubes. The comparisons were made for 1-row brazed aluminum designs using 3 × 16 mm or 2 × 20 mm cross-section tubes, whose condensing performance has been measured. Used with a commercially available fin geometry at 26 fins/in, the 3 × 16mm tube design will provide 35% material weight reduction and 15% lower pressure drop, relative to the 7.0 mm round-tube heat exchanger. No cost reduction is predicted. The predicted air-side performance was verified in wind tunnel tests. An advanced fin design having a smaller louver pitch will use 22 fins/in, and provide a 55% material cost reduction. The advanced fin geometry has 8.1 mm high fins, 12 louvers and 1.0mm louver pitch. If a tube having 2.0 mm minor diameter is used, greater air pressure drop reduction will be achieved, but at the expense of material savings.


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