Experimental study on R-134a refrigeration system using a two-phase ejector as an expansion device

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Publication Details

Author list: Chaiwongsa P., Wongwises S.

Publisher: Elsevier

Publication year: 2008

Journal: Applied Thermal Engineering (1359-4311)

Volume number: 28

Issue number: #

Start page: 467

End page: 477

Number of pages: 11

ISSN: 1359-4311

eISSN: 1873-5606

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-38449114497&doi=10.1016%2fj.applthermaleng.2007.05.005&partnerID=40&md5=afed57698978e64246a3f9b73fa04528

Languages: English-Great Britain (EN-GB)

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Abstract

This paper is a continuation of the authors previous work. In the present paper, the performance of the refrigeration cycle using a two-phase ejector as an expansion device is experimentally investigated. Refrigerant R-134a is used as working fluid. Motive nozzles having three different outlet diameters are tested. New experimental data that have never been seen before are presented on the effects of the external parameters i.e. heat sink and heat source temperatures on the coefficient of performance and various relevant parameters i.e. primary mass flow rate of the refrigerant, secondary mass flow rate of the refrigerant, recirculation ratio, average evaporator pressure, compressor ratio, discharge temperature and cooling capacity. The effects of size of the motive nozzle outlet on the system performance are also discussed. ฉ 2007.

Keywords

Expansion device, Liquid-recirculation, Motive nozzle, Two-phase ejector