| Summary: | This paper sets to analyse the features of heat spatial distribution and improvement model for the heat exchanger used in the automobile engine bay. We adopted the method focused on research subjects of bus and truck and based the research on the three-dimensional model and numerical simulation of the heat exchanger. The results showed that the external cool air can enter directly into the cooling module of the automobiles and be emitted back to the outside after the cooling refrigerant, thus forming an airflow loop. To calculate the pressure loss, it should be counted as system resistance. It helps to satisfy the heat radiation needs of automobiles by improving the model of heat spatial distribution of heat exchanger in the automobile engine bay. In conclusion, we used the DUAL heat dissipation module in the calculation of heat spatial distribution of automobile engine heat exchanger by focusing on analysing the features of spatial distribution with the help of the three-dimensional model and relevant calculations, enabling the reflection of the process where cool airflow is heated and then cooled internally by the cooling refrigerant.
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