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Refrigeration systems with minimized refrigerant charge: system design and performance
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2005 (English)In: Proceedings of the Institution of mechanical engineers. Part E, journal of process mechanical engineering, ISSN 0954-4089, Vol. 219, no E2, 127-137 p.Article in journal (Refereed) Published
Abstract [en]

Independently of the choice of refrigerant, environmental and/or safety issues can be minimized by reducing leakage and the amount of refrigerant charge in heat pump or refrigeration systems, preferably both. In the investigation reported here, a laboratory test rig was built, simulating a water-to-water beat pump with a heating capacity of 5 kW. The system was designed to minimize the charge of refrigerant mainly by use of minichannel aluminium heat exchangers and a compact system design. It was shown that the system could be run with 200 g of propane at typical domestic heat pump operating conditions without reduction in the heating coefficient of performance (COP,) compared with a traditional design. Additional charge reduction is possible by selecting proper compressor lubrication oils or by employing a compressor simply using less lubrication oil.

Place, publisher, year, edition, pages
2005. Vol. 219, no E2, 127-137 p.
Keyword [en]
heat pumps, propane, minimum charge, mini channel heat exchangers, aluminium tube heat exchangers, mini channel evaporator, mini channel condenser
URN: urn:nbn:se:kth:diva-14935DOI: 10.1243/095440805x7062ISI: 000230737400005ScopusID: 2-s2.0-22144459386OAI: diva2:332976
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Lundqvist, Per G.
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Applied Thermodynamics and Refrigeration
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