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Experimental and CFD estimation of heat transfer in helically coiled heat exchangers

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Title Experimental and CFD estimation of heat transfer in helically coiled heat exchangers
 
Creator JAYAKUMAR, JS
MAHAJANI, SANJAY
MANDAL, JC
VIJAYAN, PK
BHOI, ROHIDAS
 
Subject boundary conditions
heat flux
coiled tubing
heat transfer coefficients
 
Description Enhancement in heat transfer due to helical coils has been reported by many researchers. While the heat transfer characteristics of double pipe helical heat exchangers are available in the literature, there exists no published experimental or theoretical analysis of a helically coiled heat exchanger considering fluid-to-fluid heat transfer, which is the subject of this work. After validating the methodology of CFD analysis of a heat exchanger, the effect of considering the actual fluid properties instead of a constant value is established. Heat transfer characteristics inside a helical coil for various boundary conditions are compared. It is found that the specification of a constant temperature or constant heat flux boundary condition for an actual heat exchanger does not yield proper modelling. Hence, the heat exchanger is analysed considering conjugate heat transfer and temperature dependent properties of heat transport media. An experimental setup is fabricated for the estimation of the heat transfer characteristics. The experimental results are compared with the CFD calculation results using the CFD package FLUENT 6.2. Based on the experimental results a correlation is developed to calculate the inner heat transfer coefficient of the helical coil.
 
Publisher Elsevier
 
Date 2009-02-13T15:04:44Z
2011-11-25T16:41:22Z
2011-12-26T13:05:44Z
2011-12-27T05:52:59Z
2009-02-13T15:04:44Z
2011-11-25T16:41:22Z
2011-12-26T13:05:44Z
2011-12-27T05:52:59Z
2008
 
Type Article
 
Identifier Chemical Engineering Research and Design 86(3), 221-232
0263-8762
http://dx.doi.org/10.1016/j.cherd.2007.10.021
http://hdl.handle.net/10054/620
http://dspace.library.iitb.ac.in/xmlui/handle/10054/620
 
Language en