Summary
The main purpose of this work is to enhance the energy efficiency of CO2 automobile air conditioning system. Theoretical analysis demonstrated that the mixture of CO2 and propane can improve its performance, thus, experiments have been carried out to see effects of various CO2-propane mass fractions of 100/0, 90/10, 80/20, 70/30, 60/40, 50/50 on the system performance at different ambient temperatures and gas cooler frontal air velocities. Experimental results show similar trends with those from the theoretical results. It has been shown that under the same compressor speed, system COP reaches highest at 60% of CO2 mass fraction, which is 29.4% higher than pure CO2 system and even achieves equal level of the R134a system, the optimum pressure and discharge temperature are reduced up to a maximum of 40% and 47°C during the research range. Furthermore, comparison was carried out under the same cooling capacity by adjusting compressor speed for different mass fraction of CO2, results demonstrate that the use of CO2-propane mixtures yields a maximum COP rise of 22%even when cooling capacity is kept constant. A new optimum high pressure control algorithm for the transcritical CO2-propane mixture cycle has been developed based on the experimental data within a deviation of 5%.
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Details
- Original title: Performance improvements evaluation of an automobile air conditioning system using CO2-propane mixture as a refrigerant.
- Record ID : 30023519
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 88
- Publication date: 2018/04
- DOI: http://dx.doi.org/10.1016/j.ijrefrig.2017.12.016
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Indexing
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Themes:
CO2;
Hydrocarbons;
Mobile air conditioning - Keywords: R744; R290; Propane; Zeotropic mixture; Mixture; Expérimentation; Energy efficiency; Mobile air conditioning; CO2
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CO2 + propane mixture as working fluid for refr...
- Author(s) : TOBALY P., TERRIER M. F., BOUTEILLER P.
- Date : 2018/06/18
- Languages : English
- Source: 13th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2018). Proceedings. Valencia, Spain, June 18-20th 2018.
- Formats : PDF
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Flammability classification and advantages of C...
- Author(s) : PAEZ A., BALLOT-MIGUET B., TOBALY P.
- Date : 2023/08/21
- Languages : English
- Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
- Formats : PDF
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Experimental analysis of CO2 blends ...
- Author(s) : SÁNCHEZ D., CALLEJA-ANTA D., NEBOT-ANDRÉS L., CABELLO R., LLOPIS R.
- Date : 2020/12/07
- Languages : English
- Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
- Formats : PDF
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Investigation on solid-liquid equilibrium for b...
- Author(s) : SOBIERAJ M., KSIONEK D., PAVKOVIC B.
- Date : 2023/10
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 154
- Formats : PDF
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Analysis of Propane + CO2 mixture as a working ...
- Author(s) : KUMAR K., KUMAR P.
- Date : 2019/04/11
- Languages : English
- Source: 8th Conference on Ammonia and CO2 Refrigeration Technology. Proceedings: Ohrid, North Macedonia, Avril 11-13, 2019.
- Formats : PDF
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