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According to previous theoretical and experimental investigations, applying a Voorhees supercharge method in R-744 heat pump cycles is an effective way to improve the heating capacity of a heat pump in cold climates. In order to explore the improvement possibility and potential of the heating capacity of heat pump units and to obtain optimum energy efficiency, R-744 heat pumps are investigated at different operating conditions. Tests have been performed with an R-744 system, designed for car air conditioning, where the same compressor was applied with and without Voorhees supercharge. The bypass control method for Voorhees supercharge system is also tested and discussed. The way of operating these kinds of units at different operating conditions is advised based on experimental results.
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Details
- Original title: Investigation of transcritical R-744 Voorhees heat pump system.
- Record ID : 2008-0381
- Languages: English
- Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
- Publication date: 2006/05/29
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Indexing
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The effective use of carbon dioxide for heat pu...
- Author(s) : KALNIN I. M., VASÛTIN V. A., PUSTOVALOV S. B.
- Date : 2003
- Languages : Russian
- Source: Kholodilnaya Tekhnika - n. 7
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The use of carbon dioxide in refrigeration and ...
- Author(s) : PISANO G.
- Date : 2007/06/08
- Languages : English
- Source: Technological innovations in air-conditioning and refrigeration industry + CD-ROM.
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Thermodynamische Prozessberechnungen für CO2-Kä...
- Author(s) : SIEVERS U.
- Date : 2005/11/16
- Languages : German
- Source: DKV-Tagungsbericht 2005, Würzburg./ 2005 Proceedings of the DKV Conference, Würzburg.
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Study on transcritical R744 (CO2) Voorhees heat...
- Author(s) : ZHA S., HAFNER A., NEKSÅ P.
- Date : 2005/08/30
- Languages : English
- Source: Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
- Formats : PDF
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Optimal compressor discharge pressure and perfo...
- Author(s) : LI C., JIANG P., ZHU Y.
- Date : 2022/12
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 144
- Formats : PDF
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