【摘要】 以现场的压缩空气为实验工质 ,对压缩空气在人字形波纹板式换热器的传热与流阻性能进行实验研究。研究结果表明 ,与传统的光滑管弓形隔板换热器相比 ,板式换热器能非常有效地强化空气侧的膜传热系数。但是板式换热器的膜传热系数是花瓣状翅片管 (PF管 )螺旋隔板换热器的 30 %～ 4 0 % (以胚管外表面积计算 ) ,是低肋管螺旋隔板换热器的 4 0 %～ 50 % ,然而其压力损失却是PF管螺旋隔板换热器的 3～ 5倍 ,是低肋管螺旋隔板换热器的1.7～ 3倍。此外还从传热与流阻性能、传热效率、紧凑性和经济性等方面对板式换热器的整体性能进行了评价。更多还原

【Abstract】 Using compressed air as working medium,heat transfer and pressure drop characteristics of compressed air in mixed Chevron bellows plate heat exchanger were tested.The results showed that compared to conventional smooth segment baffle heat exchanger,the plate heat exchanger(PHE) can effectively strengthen the film heat transfer coefficient of the shell side.The film heat transfer coefficient of the PHE is 30%～40% of the PF (petal shaped fin tubes) or 40%～50% of the LF(low finned tubes) heat exchanger.While the pressure drop of PHE is 3～5 times that PF helical baffle heat exchanger and 1.7～3 times that the LF helical baffle heat exchanger.The bulk characteristics of the PHE were evaluated from heat transfer and pressure drop characteristics,heat transfer efficiency,compactness and economic characters etc.更多还原