Cycle-Model Assessment of Working Fluids for a Low-Pressure CO2 Climate Control System
A low-pressure CO2-based climate-control system has the environmental benefits of CO2 refrigerant but avoids the extremely high pressures of the transcritical CO2 cycle. In the new cycle, a liquid “cofluid” is circulated in tandem with the CO2, with absorption and desorption of CO2 from solution replacing condensation/gas cooling and evaporation of pure CO2. This work compares the theoretical performance of the cycle using two candidate cofluids: N-methyl-2-pyrrolidone and acetone. The optimal coefficient of performance (COP) and refrigeration capacity are discussed in terms of characteristics of the CO2-cofluid mixture. Thermodynamic functions are determined either from an activity coefficient model or using the Soave equation of state, with close agreement between the two approaches. Reductions in COP due to nonideal compressor and heat exchangers are also estimated.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
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Supplemental Notes:
- Abstract reprinted with permission of SAE International.
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Authors:
- Mozurkewich, George
- Roberts, Russell D
- Greenfield, Michael L
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0000-0002-4704-1489
- Schneider, William F
- Meyer, John J
- Zietlow, David C
- Stiel, Leonard I
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Conference:
- SAE 2000 World Congress
- Location: Detroit Michigan, United States
- Date: 2000-3-6 to 2000-3-9
- Publication Date: 2000-3-5
Language
- English
Media Info
- Media Type: Web
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Serial:
- SAE Technical Paper
- Publisher: Society of Automotive Engineers (SAE)
- ISSN: 0148-7191
- EISSN: 2688-3627
- Serial URL: http://papers.sae.org/
Subject/Index Terms
- TRT Terms: Carbon dioxide; Carbon monoxide; Heat exchangers; Humidity; Pressure
- Subject Areas: Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01795355
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 2000-01-0578
- Files: TRIS, SAE
- Created Date: Dec 9 2021 10:17AM