摘要
采用效率传热单元法(ε-NTU)分析了顺流和逆流2种形式套管式换热器效率的影响因素,给出了效率计算公式和线算图。分析认为,当采用单管式换热器时,逆流连接方式的换热效率较高,当采用双程套管换热器时,顺流连接方式的换热效率较高。
Using the efficiency-number of heat transfer units method（e-NTU method） ,the influencing factors to the heat-transfer efficiencies was analyzed when it was parallel-flow and reverseflow forms. The formulas and figures of the efficiency calculate were provided. The results indicated that the reverse-flow was higher than that of parallel-flow in heat-transfer efficiency when it was a single-casing,but it was reverse when using double-way casing heat-transfer.
出处
《石油化工设备》
CAS
2009年第5期26-29,共4页
Petro-Chemical Equipment
基金
甘肃省自然科学基金项目(0803RJZA003)
兰州工专科研资助项目(07K-009)
关键词
换热器
换热效率
顺流
逆流
影响因素
heat exchanger
heat-transfer efficiency
parallel-flow
reverse-flow
influencing factor
