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Developing a CO2 expander to replace the throttling valve in CO2 transcritical cycles is a good way to improve the efficiency of the cycle. In this paper, many types of CO2 expanders were compared in terms of the properties of the CO2 expanding process. The rolling piston expander was selected due to its suitable capacity, low cost, simple construction and relatively high efficiency. According to the CO2 transcritical water-to-water heat pump experimental system and the design system operation condition, the construction parameters of the rolling piston expander prototype were determined. The two types of inlet control systems-mechanical controlling system and electromagnetism controlling system were analysed and compared. The mechanical control system was chosen in the rolling piston expander due to its reliability and simplicity. The efficiency was analysed and loss analysis results obtained with the CO2 expander prototype were provided.
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Details
- Original title: The development of a CO2 expander in CO2 transcritical cycles.
- Record ID : 2004-1035
- Languages: English
- Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Publication date: 2003/08/17
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Indexing
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Development and experimental research on CO2 tr...
- Author(s) : MA Y., LI M., LI L., et al.
- Date : 2003
- Languages : Chinese
- Source: Journal of Refrigeration - n. 4
- Formats : PDF
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- Author(s) : ZENG X., MA Y., LIU S., 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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- Author(s) : ZHANG B., PENG X., HE Z., et al.
- Date : 2007/06
- Languages : English
- Source: Applied Thermal Engineering - vol. 27 - n. 8-9
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- Author(s) : KOHSOKABE H., FUNAKOSHI S., TOJO K., et al.
- Date : 2006/07/17
- Languages : English
- Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
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Development of a combined compressor-expander f...
- Author(s) : YANG J., ZHANG L., CHENG J., 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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