Matching Research Of Mobile Air Conditioning Cooling-System

The research on the air conditioning matching of HAISHI H2microbus. To the question of hard circumstance and excessive affecting factors when Automobile Air Conditioning working. The purpose of this study is to survey the potential of energy efficiency improvement and emission reduction of the enhanced MAC based on the components optimization using the simulation and experimental methods. The Total Equivalent Warming Impact (TEWI) is taken as the evaluation target of this study.The optimization studies of louver fin used in heat exchangers shows that the fin depth, fin pitch and louvers number are the most important parameters in the heat exchanger designs. The potential of energy efficiency improvement of MAC and carbon emission reduction based on the system component optimization is studied using the vapor compression thermo-dynamic cycle analysis. The theoretical results indicate that the optimized evaporator and condenser can improve the COP of MAC dramatically.The system simulation platform is established based on the components numerical models. The precious models of scroll compressor、micro-channel parallel flow evaporator and sub-cooling parallel flow condenser are set up and validated by numbers of experiments. The performance deviation compared with test data is within+/-5%. These models improve the precision and expand the usages. These two new models are imported into the system simulation tool and a new system simulation platform is built up. The stable and dynamic simulation results show that the deviation compared with experimental data is within+1-5%.The wind-tunnel test results and on-road test results show that the response to the in-car temperature and the ambient temperature changes of the variable displacement compressor system is quicker than that of the fixed displacement compressor system and the variable displacement compressor system can supply the passengers a more comfortable and steady compartment environment through the comparison between the variable displacement compressor system and the fixed displacement compressor system, thus the reasonableness of the set up model and the accuracy of the calculation have gained verification.