Performance Simulation and Study Analysis of The Vehicle Air Conditioning System

Abstract

Abstract. In this paper, it is established the model of air-conditioning system and a simplified model of cooling system in the vehicle. That model is based on the test data. One-dimensional model has been corrected by the three-dimensional calculation results. Therefore, the one-dimensional model also reflects the impact of cabin air return. The results show that the coolant temperature affect on the performance of air conditioning is very small. But the ambient temperature affect on the performance of air conditioning is significant. ModelThe performance of air conditioning system is not only effect on the working conditions of vehicle it is also influenced by the cooling system. Therefore, in this paper, it is established the model of air-conditioning system and a simplified model of cooling system in the vehicle. Wherein air conditioning system is consist of a compressor model, a condenser model, model evaporator, thermostat model. That model is based on the test data shown as in Figure 1. The actual flow of the vehicle cabin is very complex, so we have established a cabin air-side model according to the position of the vehicle front-end module. One-dimensional model has been corrected by the three-dimensional calculation results. Therefore, the one-dimensional model also reflects the impact of cabin air return shown as in Figure 2. SimulationFirstly, study the effect of different coolant temperature air conditioning system performance. Therefore, keep the ambient temperature at 35˚C, and change the engine coolant temperature at respectively is 95,105 and 115˚C, We study the performance of the air conditioning system.