基于热管与热电技术的新风系统传热性能研究

Study on Heat Transfer Performance of Outdoor Air System Based on Heat Pipe and Thermoelectric Technology

为了提高室内舒适度、降低室内能耗,设计了一种热管与热电技术相结合的新风系统,并对新风系统的传热性能进行实验研究,对比分析在新风量为150 m^(3)/h的工况下,热管换热器与热电制冷器的不同组合方式、热电制冷器的不同工作电流(2.5~4.0 A)分别对系统传热性能的影响。研究表明:新风先经过热电制冷器再经过热管换热器的组合方式提高了系统的整体性能,增强了系统的换热能力;系统的制热量随着热电制冷器工作电流的增大而增大,最高可达350 W,而系统的能效比COP呈下降趋势,但均大于1.0。冬季时,相对于无热回收的新风工况,系统相对节能率达38.0%。

In order to improve indoor comfort and reduce indoor energy consumption,an outdoor air system with heat pipe and thermoelectric technology was designed,and the heat transfer performance of the outdoor air system was experimentally studied,the effects of different combination modes of heat pipe heat exchanger and thermoelectric cooler and different working current(2.5-4.0 A)of thermoelectric cooler on the heat transfer performance of the system under the condition of fresh air volume of 150 m^(3)/h were compared and analyzed.The results show that the combined mode of fresh air passing first through thermoelectric cooler and then through heat pipe heat exchanger improves the overall performance of the system and enhances the heat transfer capability of the system;and the heating capacity of the system increases with the increase of the working current of the thermoelectric cooler,the maximum energy efficiency is 350 W,and the coefficient of performance(COP)of the system is decreasing,but both of them are more than 1.0.In winter,the relative energy-saving rate of the system is 38.0%compared with the fresh air condition without heat recovery.