Comparative Performance of an Automotive Air Conditioning System Using Micro-channel Condensers with and Without Liquid-vapor Separation

Abstract

This paper experimentally investigated the performances of an automotive air conditioning (AAC) system with the liquid-vapor separation micro-channel condenser (LSMC) and a common parallel flow micro-channel condenser (PFMC), respectively. The performances of the two systems were compared under nomal running condition of IMACA. The cooling capacity of the LSMC system was 5.18% higher than that of the PFMC and the EER value of the LSMC system was 3.73% higher than that of the PFMC. The further investigation on the performance of the two systems were measured under the outdoor dry bulb temperature varying from 29 to 41 while the indoor dry bulb ℃ ℃ and wet bulb temperature fixed at 27 and 19.5 .℃ ℃ In addition, under the standard condition of IMACA, the thermodynamic performance of two systems under the condenser air face velocity varying from 1.5 to 4.5m/s was investigated. Compared with the PFMC system, the cooling capacity and EER of the LSMC system were improved by 1.79%~8.49% and 1.43%~7.18%, respectively.

Adsorption Air Conditioning for Automotive Applications: A Critical Review

“…Reference source not found. reports a comprehensive list of refrigerants widely used in automotive applications (1-5) as well as new refrigerants (6)(7)(8)(9). Energy Efficiency:…”

“…However, also novel technical solutions are investigated. In [6] author compared the performances of an automotive air conditioning system equipped with a liquid-vapour separation micro-channel condenser and a common parallel flow micro-channel condenser (PFMC). Under normal running conditions, the proposed system exhibited a 5.18% higher cooling capacity and a 3.73% higher EER (Energy Efficiency Ratio) compared to the standard solution.…”

Adsorption Air-Conditioning for Automotive Applications: A Critical Review

“…Common refrigerants used in automotive AC systems today include hydrofluoroolefins (HFOs) such as R1234yf, which have significantly lower GWPs compared to their predecessors. Table 1 reports a comprehensive list of refrigerants that are widely used in automotive applications (1-5) as well as new refrigerants (6)(7)(8)(9). In recent years, there has been a growing emphasis on improving the efficiency of automobile air-conditioning systems to address concerns about global warming and fuel costs.…”

Design and performance optimization of microchannel condensers for electric vehicles

“…Gunnasegaran et al 19 compared the characteristics of three microchannels cross‐section shapes and found that rectangular microchannels lead to the smallest hydraulic diameter and highest heat‐transfer coefficient, followed by trapezoidal microchannels. Zheng et al 20 and Li et al 21 proposed microchannel heat exchangers equipped with a gas‐liquid separator, which achieved a coefficient of performance (COP) 1.3% to 6.6% higher than conventional microchannel heat exchangers. Li et al 21,22 optimized the pass layout of the microchannel condenser with a gas‐liquid separation device, which increased the condensation flow by 17.8%.…”