The power cooling system for hybrid power automobile is different from that for traditional engine cooling system circuit, which needs to introduce an additional cooling circuit due to different working temperature range; thereby the new heat exchanger named low temperature radiator should be added in the cooling module layout, and the low temperature radiator may lead a fatal affect on the vehicle performance. In this paper, base on the cooling module design and the development of the cooling performance of air conditioning (AC) system, the low temperature radiator location is defined finally with the balance of development cost, schedule, difficulty and performance. The virtual design process is used as a part of the vehicle integrated development process, which could be a guidance or reference not only for AC system development but also for all the vehicle parts and performance; it could lead to a more comprehensive and more authoritative way for the conceptual design of vehicle development, and result in a shorter cycle and lower cost.%混合动力汽车的动力冷却系统因其工作温度范围不同，需要在相较于传统发动机的高温冷却回路之外添加一个低温冷却回路，即在冷却模块上需要添加一个低温散热器，此零件的具体布置方式对整车性能的影响至关重要。本文从混动车冷却模块和空调制冷性能的开发设计角度出发，综合考虑了开发成本、进度、难易程度和性能之间的平衡，最终确定了低温散热器的位置。虚拟设计流程属于整车集成开发流程的一部分，不仅仅适用于空调制冷系统，对于其他零部件和性能开发上都具有一定的指导意义，它使整车开发前期概念设计更加全面、具有较高的置信度，并使设计周期更短费用更低。
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