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An Experimental Study of Vapor Ejectors Working with R245fa
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0001-6139-4400
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2017 (English)In: Second Thermal and Fluids Engineering Conference, 2017, p. 925-928Conference paper, Published paper (Refereed)
Abstract [en]

The vapor ejector is the key component in the ejector refrigeration system. The ejector determines the working stability and performance of the whole system. A specific test rig was designed and built with a focus on the performance of ejector itself. Instead of a circulation pump and a generator in the ejector refrigeration system, a compressor was used as the driving source. R245fa was selected as the working fluid. The important parameters, like pressure, temperature and mass flow rate, were measured and recorded. The entrainment ratio was obtained at a maximum value of 0.28. It was found that using ideal gas law and an appropriate value of the ejector nozzle isentropic efficiency could provide reasonable predictions of the mass flow rate through the ejector nozzle. Moreover, the insignificant impact of the superheat of the secondary flow on entrainment ratio was verified.

Place, publisher, year, edition, pages
2017. p. 925-928
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-249375DOI: 10.1615/TFEC2017.emi.017621ISBN: 978-1-56700-430-4 (print)OAI: oai:DiVA.org:kth-249375DiVA, id: diva2:1304251
Conference
Second Thermal and Fluids Engineering Conference,
Note

QC 20190617

Available from: 2019-04-11 Created: 2019-04-11 Last updated: 2019-06-17Bibliographically approved

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