Research on the heat flow field synergy of electric vehicle power cabin at different charge and discharge rates

This paper studies the effects of different air-outlet modes on the heat flow field synergy analysis of electric vehicle power cabin which is based on natural wind cooling. Based on field synergy principle, concepts of original field and function field, positive synergy and negative synergy, one-way synergy and two-way synergy are presented at first. Then the field synergy analysis method is expounded: when the function field and the original field are positive synergy, the movement trends along with the direction of original field would further increase, conversely, it would decrease; it does a more detailed definition for field synergy principle. The results indicate that: combining with simulation calculation and the field synergy analysis method, the analysis of the heat flow field characteristics and the choice for the air outlet mode of electric vehicle power cabin will be rapid, simple and accurate; when the temperature gradient value is constant, increasing the speed value could improve the field synergy number and improve the heat dissipation performance. Then the reference basis for the choice of heat flow field synergy analysis of electric vehicle power cabin and air-outlet mode is offered. (C) 2017 Elsevier Ltd. All rights reserved.