汽车排气余热采暖技术研究及应用

Research and application of automobile exhaust heat recovery technology

针对某越野车系列车型空调暖风系统采暖性能的不足,现重新对暖风系统方案进行改进优化预研。原车以空气加热器作为车厢暖风能量的来源,而优化方案采用汽车尾气回收技术,将发动机排气余热回收利用,通过发动机排气收集换热装置和电动水泵,对发动机冷却液进行二次加热,提高冷却液的温度,解决极寒天气车厢暖风能量不足的问题。采用该技术能减少燃油消耗率,提高续驶里程,同时避免空气加热器工作时尾气泄漏风险和尾气排放污染;车厢内增加车厢暖风散热器和电子风扇,解决了原车暖风风道布置困难,暖风风速、温度分布不均,空气干燥和异味等问题。此项技术的研究及应用,解决了越野车辆冬季极寒地区车内采暖问题,取得了良好的暖风采暖和除霜效果,提高了乘员乘坐舒适性,同时起到节能减排的示范效果,具有广泛地推广应用价值。

In view of the deficiency of heating performance of air conditioning heating system of a series of off-road vehicles, dongfeng automobile company has carried out an improvement and optimization preliminary study on the heating system scheme. The original vehicle use air heaters as the source of the car’s warm air energy, and the optimization scheme USES the automobile exhaust recovery technology to recycle the engine’s exhaust residual heat, collect the heat exchange device and electric pumps through the engine’s exhaust, reheat the engine’s cooling fluid, increase the temperature of the cooling fluid, and solve the problem of the car’s lack of warm air energy in extremely cold weather. The adoption of this technology can reduce fuel consumption rate, improve driving mileage, and avoid the risk of tail gas leakage and tail gas emission pollution when the air heater works. Add car radiator and electric fan, solve the original car warm air duct layout difficulty, warm air speed, temperature distribution uneven, air drying and odor problems. The research and application of the technology, solve the interior heating problem of off-road vehicle in winter cold area, has obtained the good effect of warm air heating and defrosting, improved occupant comfort, at the same time have the demonstration effect of energy conservation and emissions reduction,has widely application value.