Heat transfer and pressure drop analysis of automotive HVAC condensers with two phase flows in minichannels

Skiepko Teodor ()
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Skiepko Teodor: Bialystok University of Technology, Poland

Engineering Management in Production and Services, 2021, vol. 13, issue 4, 174-188

Abstract: The air cooled automotive condensers under study are of brazed aluminium tube and center, consisting of one row array of horizontal parallel multi-port flat tubes with louver fins on air side. Each tube is with a number of smooth parallel minichannels for internal flow of refrigerant. The analysis uses decomposition of the condenser along refrigerant flow path into specific different zones as follows: two single phase zones, namely: superheated and subcooled, and a few zones of two phase flow that can appear along some specific condensation paths to be: annular/intermittent/bubble or annular/annular-wavy/intermittent/bubble or annular/wavy/stratified. The approach presented is based on experimental correlations for heat transfer and pressure drop. The heat transfer prediction is performed using ε – NTUo methodology. The results of the analysis refer to overall heat transfer rate, heat transfer in particular zones, pressure gradients heat transfer coefficients, vapour quality, condensation paths.

Keywords: air cooled condenser; heat transfer and pressure drop analysis; minichannels (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:vrs:ecoman:v:13:y:2021:i:4:p:174-188:n:3

DOI: 10.2478/emj-2021-0039

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