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RIBBED DOUBLE PIPE HEAT EXCHANGER: ANALYTICAL ANALYSIS

Al-Kayiem, Hussain H. and El-Rahman, Mohamed (2011) RIBBED DOUBLE PIPE HEAT EXCHANGER: ANALYTICAL ANALYSIS. [Citation Index Journal]

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Abstract

This paper presents the findings obtained by modeling a Double Pipe Heat Exchanger (DPHE) equipped with repeated ribs from the inside for artificial roughing. An analytical procedure was developed to analyze the thermal and hydraulic performance of the DPHE with and without ribbing. The procedure was verified by comparing with experimental reported results and they are in good agreement. Several parameters were investigated in this study including the effect of ribs pitch to height ratios, P/e= 5, 10, 15, and 20, and ribs to hydraulic diameter ratios, e/Dh= 0.0595, 0.0765, and 0.107. These parameters were studied at various operating Reynolds numbers ranging from 2500 to 150000. Different installation configurations were investigated, too. An enhan-cement of 4 times in the heat transfer in terms of Stanton number was achieved at the expense of 38 times increase of pressure drop across the flow in terms of friction facto values. Keywords: Double pipe heat exchangers, Heat transfer enhancement, Ribbing, Counter flow.

Item Type:Citation Index Journal
Subjects:T Technology > TJ Mechanical engineering and machinery
Departments / MOR / COE:Mission Oriented Research > Energy
ID Code:7358
Deposited By: Assoc Prof Hussain H. Al-Kayiem
Deposited On:10 Jan 2012 00:12
Last Modified:19 Jan 2017 08:22

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