Experimental Study on Heat Transfer and Pressure Drop of Micro-Sized Tube Heat Exchanger  

作　　者：王秋香 戴传山 

机构地区：[1]Key Laboratory of Efficient Utilization of Low and Medium Grade Energy of Ministry of Education,Tianjin University

出　　处：《Transactions of Tianjin University》2014年第1期21-26,共6页天津大学学报（英文版）

基　　金：Supported by National Basic Research Program of China("973"Program,No.2011CB707203)

摘　　要：A micro-sized tube heat exchanger(MTHE) was fabricated, and its performance in heat transfer and pressure drop was experimentally studied. The single-phase forced convection heat transfer correlation on the sides of the MTHE tubes was proposed and compared with previous experimental data in the Reynolds number range of 500—1 800. The average deviation of the correlation in calculating the Nusselt number was about 6.59%. The entrance effect in the thermal entrance region was discussed. In the same range of Reynolds number, the pressure drop and friction coefficient were found to be considerably higher than those predicted by the conventional correlations. The product of friction factor and Reynolds number was also a constant, but much higher than the conventional.A micro-sized tube heat exchanger （MTHE） was fabricated, and its performance in heat transfer and pres-sure drop was experimentally studied. The single-phase forced convection heat transfer correlation on the sides of the MTHE tubes was proposed and compared with previous experimental data in the Reynolds number range of 500-1 800. The average deviation of the correlation in calculating the Nusselt number was about 6.59%. The entrance effect in the thermal entrance region was discussed. In the same range of Reynolds number, the pressure drop and friction coefficient were found to be considerably higher than those predicted by the conventional correlations. The product of friction factor and Reynolds number was also a constant, but much higher than the conventional.

关 键 词：micro-sized tube heat exchanger heat transfer pressure drop entrance effect 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK172[动力工程及工程热物理—热能工程]