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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传热与流阻性能进行了实验研究。研究结果表明板式换热器与传统的光滑管弓形隔板换热器相比较,板式换热器能非常有效地强化气侧的膜传热系数,但是与空气在花瓣状翅片管( 以下简称PF管) 和低肋管螺旋隔板换热器壳侧的传热相比较,在同等的传热量下,板式换热器的膜传热系数是PF 管螺旋隔板换热器的(30 ~40) % ( 以胚管外表面积计算,下同) 、是低肋管螺旋隔板换热器的(40 ~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、换热效率、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。
Taking the compressed air at the scene as the experimental working fluid, the heat transfer and flow resistance of the compressed air in the herringbone corrugated heat exchanger were experimentally studied. The results show that compared with the traditional smooth tube heat exchanger, the plate heat exchanger can effectively enhance the heat transfer coefficient of the gas side, but with the air in the petal-like finned tube (hereinafter referred to as PF pipe) and low rib spiral shell heat exchanger shell side heat transfer compared to the same heat transfer, the plate heat exchanger membrane heat transfer coefficient is PF spiral tube heat exchanger (30 ~ 40%) (in terms of the external surface area of the embryo tube, the same below) is (40 ~ 50)% of the low-finned spiral diaphragm heat exchanger but its pressure loss is 3 ~ 5 times the low-cost spiral ribbed heat exchanger 1-7 times 3 times. In addition, the heat transfer and flow resistance, heat transfer efficiency, compactness and economic aspects of the overall performance of the plate heat exchanger were evaluated.