板式全热交换器芯体传热性能研究

Study on Energy Exchange Performance of Core of Fixed-plate Energy Exchanger

对采用相同透湿膜的方形结构及菱形结构板式全热交换器芯体进行了传热性能比较实验分析。由于菱形结构芯体在流道中具有逆流和交叉流,因此具有较高的传热交换效率;流速对显热效率的影响较小,但对游热效率和全热效率影响较大;当膜间距在2.4 mm,风速在1 m·s^(-1)以内时,全热效率及阻力特性较为满意。

This paper presents an experimental evaluation on engergy exchange performance of rectangle and diamond core with same moisture penetrated membrane of fixed-plate energy exchanger. Experimental results show that diamond core has better total energy exchange effectiveness because it has counter-flow and cross-flow type air arrangement. Velocity impact on sensible heat exchange effectiveness is smaller than the latent energy effectiveness and total energy effectiveness. When the film space is smaller than 2.4 mm, air velocity is less than 1 m.s^-1, the satisfied total energy effectiveness and resistance characteristics can be achieved.