[EXTERNAL] Fluid Mechanics, Thermal Engineering and Multiphase Flow Research Laboratory (FUTURE), Department of Mechanical Engineering, King Mongkut’s University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand

Received 8 May 2006; accepted 14 May 2007
Available online 2 June 2007

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.

Download the full Paper here>> experimental study on R-134a refrigeration system using a two-phase ejector as an expansion device