Summary
This study aims to investigate the supercritical heat transfer characteristics of compact micro-channel gas coolers applied in automobile CO2 heat pump systems. A simulation model of automobile gas cooler was developed by using segment-by-segment method, and validated by experimental results. Using this model, under the typical heat pump operation conditions, the temperature distributions along the CO2 refrigerant flow path were predicted, and the variation of heat transfer coefficient was analyzed. Further- more, the impacts of operation conditions such as refrigerant inlet pressure and temperature, as well as configuration parameters such as depth and pass number on the heating performance were discussed. Results show that the established model has a good prediction accuracy for heating capacity of gas cooler. It is found that there is unfavorable air temperature inhomogeneity on the airside outlet surface of gas cooler.
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Details
- Original title: Numerical study on heat transfer performance of micro-channel gas coolers for automobile CO2 heat pump systems.
- Record ID : 30027029
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 106
- Publication date: 2019/10
- DOI: http://dx.doi.org/10.1016/j.ijrefrig.2019.02.023
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Indexing
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Themes:
Heat pumps techniques;
Heat transfer;
CO2 - Keywords: Supercritical state; Electric vehicle; Heat transfer; Gas cooler; R744; Simulation; Heat pump; Heating; CO2
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Experimental and numerical investigation of a C...
- Author(s) : WENG Y., WANG D., YU B., et al.
- Date : 2019/04
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 100
- Formats : PDF
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The effects of gas cooler inlet pressure on sys...
- Author(s) : ERDEM S., ONAN C., HEPERKAN H., et al.
- Date : 2014/07/14
- Languages : English
- Source: 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Simulation and performance correlation for tran...
- Author(s) : OKASHA A., MÜLLER N.
- Date : 2018/07/09
- Languages : English
- Source: 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Effect of gas-cooler geometry on heat transfer ...
- Author(s) : MATSUO Y., ICHIHARA M., KOYAMA M., et al.
- Date : 2013/06/17
- Languages : English
- Source: 4th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
- Formats : PDF
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Performance of a tube-in-tube CO2 gas cooler.
- Author(s) : YU P. Y., LIN K. H., LIN W. K., et al.
- Date : 2012/11
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 35 - n. 7
- Formats : PDF
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