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Water-to-water heat transfer in tube-tube heat exchanger: Experimental and analytical study

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Title Water-to-water heat transfer in tube-tube heat exchanger: Experimental and analytical study
 
Creator RANE, MV
TANDALE, MS
 
Subject flow
double wall heat exchanger
serpentine layout
straight tube
analytical model
 
Description Tube-tube heat exchanger (TTHE) is a low cost, vented double wall heat exchanger which increases reliability by avoiding mixing of fluids exchanging heat. It can be potentially used for heat recovery from engine cooling circuit, oil cooling, desuperheating in refrigeration and air conditioning, dairy, and pharmaceutical industry, chemical industry, refinery, etc. These tube-tube heat exchangers are successfully demonstrated for superheat recovery water heating applications, condenser and evaporator in heat pumps, lube oil cooler for shipboard gas turbines, milk chilling and pasteurizing application. This paper presents an experimental study on various layouts of TTHE for water-to-water heat transfer. The theoretical and experimental results on this type of heat exchanger configuration could not be located in literature. Overall heat transfer coefficient and pumping power were experimentally determined for a fixed tube length and surface area of serpentine layouts with different number of bends and results are compared with straight tube TTHE. In the case investigated, serpentine layout TTHE with seven bends has shown optimum performance, with overall heat transfer coefficient 17% higher than straight tube TTHE. Two out of five serpentine layout TTHE have shown poor heat transfer performance than straight tube TTHE. The experimental results also indicate that there is a definite optimum for a number of bends in serpentine layout TTHE. An analytical model for prediction of thermo-hydraulic performance of straight layout has been developed and validated experimentally. (c) 2005 Elsevier Ltd.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-27T03:30:24Z
2011-12-26T12:57:42Z
2011-12-27T05:44:53Z
2011-08-27T03:30:24Z
2011-12-26T12:57:42Z
2011-12-27T05:44:53Z
2005
 
Type Article
 
Identifier APPLIED THERMAL ENGINEERING, 25(17-18), 2715-2729
1359-4311
http://dx.doi.org/10.1016/j.applthermaleng.2005.01.007
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11528
http://hdl.handle.net/10054/11528
 
Language en