Performance evaluation and parametric studies on variable nozzle ejector using R134A
作者： B. Elhub , Sohif Mat , K. Sopian , A.M. Elbreki , Mohd Hafidz Ruslan
DOI: 10.1016/J.CSITE.2018.04.006
关键词: Entrainment (chronobiology) 、 Mechanics 、 Injector 、 Water cooling 、 Materials science 、 Bar (unit) 、 Inlet 、 Nozzle 、 Refrigerant 、 Volumetric flow rate
摘要: Abstract Computational fluid dynamics of variable nozzle ejector has been studied to determine the optimum exit position for reliable cooling cycle operations. The flow rates primary and secondary stream were varied obtain entrainment ratio under different ranges operating conditions. refrigerant R134a was chosen based on merit its environmental performance characteristics, because currently is used widely in air conditioning system. It found that computational showed positioning position, which parameters such as pressure inlet variation temperature inlet. results obtained after optimization at 3 mm from mixing chamber when conditions inlet, outlet ( 18 bar , 6 373 K 5.6 ) respectively. Similarly, range between 0.24 − 1.283 a constant area ratio,
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