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首页> 外文期刊>Journal of Energy Resources Technology >Investigation of the Liquid-Vapor Separator Efficiency on the Performance of the Ejector Used as an Expansion Device in the Vapor-Compression Refrigeration Cycle
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Investigation of the Liquid-Vapor Separator Efficiency on the Performance of the Ejector Used as an Expansion Device in the Vapor-Compression Refrigeration Cycle

机译：汽-压制冷循环中液-气分离器效率对用作膨胀装置的喷射器性能的研究

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摘要

Ejector expansion refrigeration cycle with reference to the constant pressure mixing theory is investigated to display the effects of the liquid-vapor separator efficiency on the performance, entrainment ratio, and area ratio at various operation conditions. Reversible ejector assumption is used for the highest theoretical performance limit, whereas efficiency of the liquid-vapor separator and all ejector components is added to the model to calculate more realistic performance improvement potentials. R1234yf and R1234ze(E) having low global warming potential values are used in the analyses. Zero-dimensional thermodynamic models are constructed applying the conservation equations between the inlets and outlets of the refrigeration cycle and ejector components. Percentage performance decrease is higher when the mixing section and the separator efficiency is added to the model at higher condenser temperatures compared with the lower evaporator temperatures according to the investigated operation ranges. Vapor and liquid separation efficiency affects not only the performance but also the design of the ejector although it is an external component since it has influence on the area ratio and entrainment ratio. Finally, the difference between the percentage performance improvement of the reversible ejector cycle and the realistic ejector cycle including the separator and ejector components efficiencies is as high as 35% at the highest investigated condenser temperature for R1234yf.
机译：研究了基于恒压混合理论的喷射器膨胀制冷循环，以显示在各种工况下液汽分离器效率对性能，夹带率和面积比的影响。可逆喷射器假设用于最高理论性能极限，而液体-蒸汽分离器和所有喷射器组件的效率被添加到模型中，以计算出更现实的性能改进潜力。在分析中使用具有低全球变暖潜能值的R1234yf和R1234ze（E）。零维热力学模型是利用制冷循环入口和出口与喷射器组件之间的守恒方程建立的。根据研究的工作范围，在较高的冷凝器温度下将混合区和分离器效率添加到模型中时，与较低的蒸发器温度相比，百分比性能下降更高。蒸气和液体的分离效率虽然是外部部件，但不仅影响喷射器的性能，而且影响喷射器的设计，因为它影响面积比和夹带率。最后，在R1234yf研究的最高冷凝器温度下，可逆喷射器循环的性能提高百分比与实际的喷射器循环（包括分离器和喷射器效率）之间的差异高达35％。

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