摘要
采用效率传热单元法(ε—NTU),分析了顺流和逆流两种形式的套管式换热器的效率影响因素,给出了效率计算公式和线算图,指出当采用单管式换热器时,逆流连接方式换热效率较高,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（ ε-NTU method）, analysis the influencing factors to the heat-transfer efficiencies when it was parallel-flow and reverse-flow forms. Provide the formulas and figures of the efficiency calculate. The results indicated that the reverse-flow was higher than parallel-flow in heat-transfer efficiency when it was a single-easing, but it was reverse when using double- way casing heat-transfer.
出处
《山西建筑》
2009年第16期176-178,共3页
Shanxi Architecture
基金
甘肃省自然科学基金项目(项目编号:0803RJZA003)
关键词
换热器
换热效率
顺流
逆流
heat-transfer, heat-transfer efficiency, parallel-flow, reverse-flow
