EXPERIMENTAL INVESTIGATION OF HEAT TRANSFER CHARACTERISTICS OF LOUVER FIN-AND-TUBE HEAT EXCHANGER WITH 5 MM DIAMETER TUBES UNDER WET CONDITIONS
The heat transfer characteristics of fin-and-tube heat exchangers with 5 mm diameter tubes under wet conditions were investigated by experiments on 11 louver fin-and-tube heat exchangers.The effects of fin pitch,fin size and inlet relative humidity on air-side performance were analyzed.The results indicated that the effect of inlet relative humidity on the heat transfer rate is small,and heat transfer rate decreases with the increase of fin pitch,which is more obvious than that of fin-and-tube heat exchanger with 7 mm or larger diameter tubes.The water bridge was observed at the bottom of fin in experiments; however,it did not occur on the fin with 7 mm or large diameter tubes.A correlation for j factor was developed to predict the heat transfer performance of fin-and-tube heat exchanger with 5 mm diameter tubes.The mean deviations of the proposed j correlation are within 6.5%.
Wu W Ding G.L Gao Y.F Song J
Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China International Copper Association Shanghai Office,Shanghai 200020,China
国际会议
西安
英文
1-8
2012-08-26（万方平台首次上网日期，不代表论文的发表时间）