STUDY AND AMEND OF THE FLOW AND TUBE WALL TEMPERATURE CHANGE CORRELATION IN HEAT

EXCHANGER

Wang Zhiguo  Zhang Dewen  Xiang Xinyao

(Qinhuangdao Branch, Daqing Petroleum Institute, Qinhuangdao 066004)

Ma Yitai

(Thermal Energy Research Institute, Tianjin University, Tianjin 300072)

Abstract: Based on calculated logarithmic mean temperature in no phase change parallel flow type heat exchanger and counter flow type heat exchanger, the temperature change correlations of the flow and tube wall in no phase change parallel heat exchanger are calculated. The design parameters, the physical property data and the process parameters data are concentrated into one equation by those correlations. And the internal relations between these data are responded with these relative formula. Since several assumptions are supposed during the deduction of the correlation, the correlations are analyzed and the amending and modifying methods of them are discussed to be used in practical applications.

Key words: Heat exchanger  Temperature change correlations  Amend

CLC No: TK123

国家973重点基础规划资助项目(2000026307). Received 20041020, received in revised form 20050224