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Technical Briefs

Heat Exchanger Analysis Modified to Account for a Heat Source

[+] Author and Article Information
Vinod Narayanan1

 Oregon State University, 204 Rogers Hall, Corvallis, OR 97331-6001vinod.narayanan@oregonstate.edu

Murty Kanury, Jeromy Jenks

 Oregon State University, 204 Rogers Hall, Corvallis, OR 97331-6001

1

Corresponding author.

J. Heat Transfer 130(12), 124502 (Sep 19, 2008) (4 pages) doi:10.1115/1.2970063 History: Received July 27, 2007; Revised April 24, 2008; Published September 19, 2008

A modified heat exchanger analysis is developed here that accounts for a heat source, which is assumed to be volumetrically uniform in the hot fluid. The motivation for this work arises from the analysis of an ammonia-water absorber heat exchanger where a heat-of-absorption source term arises in the solution side. Utility of the analysis in deducing the overall heat transfer coefficient from experimental measurements is demonstrated.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

Grahic Jump Location
Figure 1

Schematic of the heat exchanger showing the analysis control volume

Grahic Jump Location
Figure 2

Temperature distribution of the hot fluid along the heat exchanger with the variation in the source term. The cold fluid temperature is fixed at 15°C.

Grahic Jump Location
Figure 3

Application of the modified U (Eq. 11) to experimental observations on the constrained thin-film absorber heat exchanger: (a) schematic of the absorber configuration and (b) the overall heat transfer coefficient determined by using Eq. 11 and data from experiments

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