<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>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 – NTU<sub>o</sub> 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.</p>
</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.

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

Engineering Management in Production and Services

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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...

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

Published Online: Feb 02, 2022

Page range: 174 - 188

Received: Jul 10, 2021

Accepted: Dec 10, 2021

DOI: https://doi.org/10.2478/emj-2021-0039

Keywords
air cooled condenser, heat transfer and pressure drop analysis, minichannels

© 2021 Teodor Skiepko, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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

Published Online: Feb 02, 2022

Page range: 174 - 188

Received: Jul 10, 2021

Accepted: Dec 10, 2021

DOI: https://doi.org/10.2478/emj-2021-0039

Keywordsair cooled condenser, heat transfer and pressure drop analysis, minichannels

© 2021 Teodor Skiepko, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
air cooled condenser, heat transfer and pressure drop analysis, minichannels