Simulation and Experimental Study on the Thermal Load of the Passenger Compartment 2020-01-5120

The determination of the thermal load of the passenger compartment is the premise and key of the air conditioning system design. There is a difference between the vehicle thermal load obtained from the conventional theoretical calculation and simulation analysis and the actual thermal load, and the difference is not easy to quantify. The experimental research is based on the steady-state research under the state of heat balance, which cannot meet the development demand for the prediction of vehicle cooling performance. In this paper, the method of one-dimensional simulation and three-dimensional CFD analysis is used to analyze the transient change of the temperature in the passenger compartment, and the thermal load model of an SUV is calibrated through a real vehicle test. The results show that the temperature distribution in the passenger compartment calculated by simulation is consistent with the trend of the test, and the error is within 10%, which meets the needs of engineering development. It is feasible to obtain the thermal load of the passenger compartment by the method of one-dimensional and three-dimensional combined simulation and test, which can provide reference for the forward design of air conditioning system components.