The characteristics of pressure recovery in an adjustable ejector multi-evaporator refrigeration system
In this paper, Computational Fluid Dynamics (CFD) technique is used to investigate the adaption of adjustable ejector for variable cooling loads and the characteristics of ejector pressure recovery in a multi-evaporator refrigeration system (EMERS) using R134a as the refrigerant. The performance o...
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| Main Authors: | , , , , |
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| 其他作者: | |
| 格式: | Article |
| 語言: | English |
| 出版: |
2013
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/98165 http://hdl.handle.net/10220/13301 |
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| 總結: | In this paper, Computational Fluid Dynamics (CFD) technique is used to investigate the adaption of
adjustable ejector for variable cooling loads and the characteristics of ejector pressure recovery in
a multi-evaporator refrigeration system (EMERS) using R134a as the refrigerant. The performance of
pressure recovery reflects the performance of the compression energy saving. The developed CFD model
is first validated by actual experimental data of an EMERS (ejector-based multi-evaporator refrigeration
system). Turbulence model constants are carefully selected in order to minimize the model prediction
error. The calibrated model is then solved to find the adaption property of the adjustable ejector and the
effects of varying cooling loads on and the pressure recovery ratio. The results indicate that the
adjustable ejector using spindle to adjust the throat area of primary nozzle is an efficient solution to
control the primary operating pressure in constant for system stability. Pressure recovery ratio is
sensitive to the varying of cooling loads and the relationship between them is then presented. |
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