车用发动机高效冷却系统研究进展

分析了传统的冷却系统的缺点:水泵风扇效率低下、过度冷却与暖机时间过长等。介绍并分析了发动机冷却系统的核心零部件(如水泵、风扇、节温器)对降低冷却功耗、提高发动机效率作用。在此基础上,介绍了先进高冷却系统加强传热的方法;如使用纳米流体、核态沸腾传热、形成气液混合流等。展望了未来汽车发动机冷却系统的发展方向,冷却系统小型化、主副冷却、分体冷却、逆流式冷却、精确冷却、集成缸盖技术及水冷式中冷器。

基于电子节温器的技术研究和应用

电子节温器是发动机节能减排的重要调节装置之一,它的主要作用是保证冷却液温度在合适的范围内,既要保证发动机不过热,也要防止发动机过冷。同时由于电子节温器具有更快的响应速度和较宽的工作温度范围,可以根据不同的工况的需要,实时不同的控制策略,从而满足发动机智能热管理的需求,达到节能减排的目的。本文结合电子节温器的结构特点和主要特性参数,对电子节温器在发动机上的应用进行归纳、分析和总结,并对未来发展方向进行展望。

Solar-Assisted Space Heating and Small Pond-Assisted Space Cooling of a Highly Insulated Energy Efficient House

For three weeks in October 2009, the U.S. Department of Energy hosted the Solar Decathlon Competition in which 20 teams of college and university students competed to design, build, and operate their own version of a solar-powered house. Team North＇s mission was to deliver North House, a compelling, marketable solar powered home for people with active lifestyles, while building Canada＇s next generation of leaders in sustainable engineering, business and design. This paper deals with a solar-assisted space heating system that was studied as a potential design for the competition. Among several other conclusions, it was found that using a solar-assisted in-floor heating system can decrease the energy consumption to only 8% of the case without the in-floor loop.