Scroll expander for carbon dioxide cycle.
Author(s) : WESTPHALEN D., DIECKMANN J.
Summary
A design has been developed and refined for a scroll energy recovery expander for use in a CO2 air-conditioning circuit for an 18 000 Btu/hr military environmental control unit (ECU). The design is based on integration of the expander with an established-design two-stage rotary CO2 compressor. Key technical issues have been addressed through analysis, including bearing loads, friction, leakage, and material stresses and deflections. Testing in a static leakage fixture has been done to verify that refrigerant leakage through the expander, the largest anticipated loss mechanism, is less than initially projected. A proof-of-concept prototype with an internal geometry identical to the expander's design has been fabricated initially for testing in a shaft-output configuration. Initial testing of the prototype has been carried out at off-design conditions. Further testing to quantify the expander performance is ongoing.
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Details
- Original title: Scroll expander for carbon dioxide cycle.
- Record ID : 2007-2045
- Languages: English
- Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Publication date: 2006/07/17
Links
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Indexing
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Themes:
Compressors;
Expansion systems;
Refrigerant circulation: piping, control, automation, safety;
CO2;
Other energy-saving and energy-recovery systems - Keywords: Refrigerating system; Energy; Military application; Design; Recovery; Compression system; Testing; Expansion; Transcritical cycle; Air conditioning; Rotary compressor; CO2
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Basic operating characteristics of CO2 refriger...
- 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].
- Formats : PDF
View record
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Transcritical CO2-cycle with expander-compressor.
- Author(s) : HEYL P., QUACK H.
- Date : 2000/07/25
- Languages : English
- Source: Final proceedings of the 4th IIR-Gustav Lorentzen Conference on Natural Working Fluids at Purdue.
- Formats : PDF
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Analysis of an ejector expansion device in a tr...
- Author(s) : LI D. Q., GROLL E. A.
- Date : 2006/05/29
- Languages : English
- Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
- Formats : PDF
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Expanders for carbon dioxide refrigeration cycles.
- Author(s) : YANAGISAWA T., FUKUTA M.
- Date : 2004
- Languages : Japanese
- Source: Refrigeration - vol. 79 - n. 925
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Development of two-phase flow expander for CO2 ...
- Author(s) : SAKITANI K., MORIWAKI M., OKAMOTO M., et al.
- Date : 2005/05/02
- Languages : English
- Source: 8th IEA Heat Pump Conference 2005: global advances in heat pump technology, applications, and markets. Conference proceedings [CD-ROM].
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