Deep Heat transfer Performance and Ratio of Length to Diameter in Shell and Tube Heat Exchangers
The relationship between ratio of length to diameter (L/D) of shell and tube heat exchangers (STHXs) and deep heat transfer was studied experimentally. The comparison of heat transfer and pressure drop performance of five STHXs with tube number of 10, 20, 30, 40, 50 are presented in this paper. The experiment is carried out in STHXs with cold air in shell side and hot air in tube side. Overall heat transfer coefficients are calculated and heat transfer coefficients of shell side are determined by Wilson plots technique. It shows that heat transfer performance decrease and pressure drop increase with the decrease of L/D, and critical point of deep heat transfer state (hot air outlet temperature equals to that of cold one) is achieved when L/D at some point between 3.08 and 4.62. When a certain heat transfer task is given, reasonable L/D can be chosen based on the experimental results.
pressure drop friction factor flow distribution ratio of length to diamgter deep heat transfer
Fuhua JIANG Xianhe DENG
School of Chemistry and Chemical Engineering, South China University of Technology, Guangdong Province, 510641,P.R.China
国际会议
青岛
英文
25-28
2010-10-28（万方平台首次上网日期，不代表论文的发表时间）