改进的喷射器蒸汽压缩系统中喷射器的优化制冷剂流量和尺寸

IF 0.8 Q4 THERMODYNAMICS
Dishant Sharma, G. Sachdeva, D. K. Saini
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引用次数: 2

摘要

本文分析了一种采用喷射器作为膨胀装置的改进蒸汽压缩冷却系统。在喷射器中膨胀制冷剂可以提高制冷效果,减少压缩机的工作量。因此,它产生了更好的性能系数。对定面积喷射器模型进行了热力学分析,得到了给定冷凝器和蒸发器温度和制冷量时喷射器的基本尺寸。应用该模型对三种制冷剂的喷射器进行了设计;R134a, R152a和R1234yf。在工程方程求解器(EES)中进行了数值模拟,得到了喷射器各截面上制冷剂的流量和直径。制冷剂R1234yf要求在给定的冷负荷范围内,在固定的5°C蒸发器温度和40°C冷凝器温度下,最大直径要求。R1234yf、R134a、R152a的一次、二次制冷剂流量均较大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimized Refrigerant Flow Rate and Dimensions of the Ejector Employed in a Modified Ejector Vapor Compression System
This paper presents the analysis of a modified vapor compression cooling system which uses an ejector as an expansion device. Expanding refrigerant in an ejector enhances the refrigeration effect and reduces compressor work. Therefore, it yields a better coefficient of performance. Thermodynamic analysis of a constant area ejector model has been done to obtain primary dimensions of the ejector for given condenser and evaporator temperature and cooling capacity. The proposed model has been used to design the ejector for three refrigerants; R134a, R152a and R1234yf. The refrigerant flow rate and the diameters at various sections of the ejector have been obtained by doing numerical modeling in Engineering Equation Solver (EES). Refrigerant R1234yf demanded the highest diameter requirements at a fixed 5∘C evaporator temperature and 40∘C condenser temperature for a given range of cooling load. Both primary and secondary refrigerants flow rates are higher for R1234yf followed by R134a and then R152a.
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来源期刊
CiteScore
2.70
自引率
10.00%
发文量
0
期刊介绍: As the only international journal in the field of air-conditioning and refrigeration in Asia, IJACR reports researches on the equipments for controlling indoor environment and cooling/refrigeration. It includes broad range of applications and underlying theories including fluid dynamics, thermodynamics, heat transfer, and nano/bio-related technologies. In addition, it covers future energy technologies, such as fuel cell, wind turbine, solar cell/heat, geothermal energy and etc.
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