Quantification on the Effects of Liquid-Vapor Separation in Air-Conditioning System by using Advanced Exergy Analysis  

作　　者：LI Yunhai CHEN Jianyong LIN Xu YANG Zhi CHEN Ying LUO Xianglong 

机构地区：[1]School of Material and Energy,Guangdong University of Technology,Guangzhou 510006,China [2]Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter,Guangzhou 510006,China

出　　处：《Journal of Thermal Science》2020年第3期597-608,共12页热科学学报（英文版）

基　　金：supported by State Key Program of National Natural Science Foundation of China(51736005);Science and Technology Program of Guangzhou(201704030108);Foshan Municipal Science and Technology Bureau Project(2015IT100162);Guangdong Special Support Program(2017TX04N371)。

摘　　要：Air-conditioning system consumes a large amount of electricity in residential sections,and its efficiency has drawn extensive concerns in energy-conscious era.Liquid-vapor separation is a heat transfer enhancement technology that can effectively improve the performance of the heat exchanger as well as the system.In this paper,a regular air-conditioning system as the baseline(system-A)and other two air-conditioning systems with liquid-vapor separation heat exchanger(system-B and system-C)are comparatively studied.The component behaviors and system performances are deeply explored by using advanced exergy analysis with a focus on quantifying how much consequences come from the variants,i.e.liquid-vapor separation.The results indicate that the system-B has large reduced exergy destruction from the compressor and condenser at cooling mode relative to the system-A.The system-C has mainly diminished exergy destruction in the compressor caused by other components relative to the system-B.At heating mode,the system-C has an enhanced system exergy efficiency of 9.6%over the system-A,and it also has the decreased avoidable exergy destruction which is dominantly contributed by the compressor and evaporator.Furthermore,it is found that liquid-vapor separation mainly benefits the compressor and outdoor heat exchanger where it locates,leading to the system performance improvements.

关 键 词：air-conditioning system liquid-vapor separation advanced exergy analysis avoidable exergy destruction 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]