Condensation of R-134a in a Multi Flow Channel Aluminum Flat Tube Condenser with Micro-Fins


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Abstract


Aluminum Multi Flow Channel Flat Tube (MFC) Condenser with micro-fins is the recent development in the field of automobile air conditioning (AC) systems. The condenser rejects heat to the atmosphere. Various correlations, based on physics of condensation process are available for determining pressure drop and heat transfer coefficients. Efforts are made to measure pressure drop and heat transfer coefficient by experimental as well as analytical methods. In order to study the behavior of MFC tube condenser, for an automobile AC unit, using R-134a as a working medium, and for developing heat transfer coefficient correlations for the same, a project work is undertaken. The available correlations to determine heat transfer coefficient for the MFC geometry are studied and Yang & Webb (1997) correlation is found to be the best fit for the job. Such correlations are being tested for the boundary conditions of interest and the results are discussed in this paper.
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Keywords


Heat Transfer; R-134a; Condensation; Two-Phase Flow

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References


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