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Analysis of an ejector expansion device in a transcritical CO2 air-conditioning system.
Author(s) : LI D. Q., GROLL E. A.
Summary
A two-phase flow ejector model was developed and validated using experimental results. An ejector expansion transcritical CO2 air-conditioning system simulation model was developed by incorporating the two-phase flow ejector model into an existing transcritical CO2 air-conditioning system simulation model. Parametric studies were performed to investigate the effects of ejector design parameters on the system performance of an US military environmental control unit for varying operating conditions. It was found that when both systems have the same gas cooler, evaporator and compressor, the ejector expansion system could have 11% higher COP and a 9.5% higher cooling capacity over the basic transcritical system.
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Details
- Original title: Analysis of an ejector expansion device in a transcritical CO2 air-conditioning system.
- Record ID : 2007-1548
- 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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Themes:
Other air-conditioning equipment;
Expansion systems;
Refrigerant circulation: piping, control, automation, safety;
CO2;
Ejector systems, air cycle, Stirling cycle, other cycles) - Keywords: Refrigerating system; Ejector system; Military application; Simulation; Modelling; Expansion; Transcritical cycle; COP; Air conditioning; CO2
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Experimental investigation of a two-phase refri...
- Author(s) : BUTRYMOWICZ D., KARWACKI J., TRELA M.
- Date : 2006/09/27
- Languages : English
- Source: Compressors 2006: 6th International Conference on Compressors and Coolants
- Formats : PDF
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Analysis of a two-phase flow ejector for the tr...
- Author(s) : LIU F., GROLL E. A.
- Date : 2008/07/14
- Languages : English
- Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Formats : PDF
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Experimental investigation of different ejector...
- Author(s) : HAFNER A., LADAM Y., ANDRESEN T., et al.
- Date : 2010/04/12
- Languages : English
- Source: 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2010). Proceedings. Sydney, Australia, April 12-14, 2010.
- Formats : PDF
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Experimental investigation of an ejector for R-...
- Author(s) : DRESCHER M., HAFNER A., JAKOBSEN A., et al.
- Date : 2007/08/21
- Languages : English
- Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
- Formats : PDF
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Regeneration of expansion energy by ejector in ...
- Author(s) : OZAKI Y., TAKEUCHI H., HIRATA T.
- Date : 2004/08/01
- Languages : English
- Source: Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
- Formats : PDF
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