CFD study of a variable area ratio ejector using R600a and R152a refrigerants
作者： Szabolcs Varga , Pedro M.S. Lebre , Armando C. Oliveira
DOI: 10.1016/J.IJREFRIG.2012.10.016
关键词:
摘要: Abstract In the present paper, numerical results for two 1 kW cooling capacity ejectors with variable primary nozzle geometry are presented using R152a and R600a as working fluids. Working fluids were selected based on criteria of low environmental impact good performance in range operating conditions adequate solar thermal energy heat source. Variable area ratio was achieved by applying a movable spindle at inlet. Numerical clearly show that adjusting position resulted significant improvement entrainment compared to fixed ejector when different from design values. This increase high 177% condenser pressures. Diagrams also both refrigerants can be used find positions maximise under conditions.
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