0
RESEARCH PAPERS: Micro/Nanoscale Heat Transfer

Experimental Verification of a New Heat and Mass Transfer Enhancement Concept in a Microchannel Falling Film Absorber

[+] Author and Article Information
Nitin Goel

Mechanical and Aerospace Engineering Department, Solar Energy and Energy Conversion Laboratory, University of Florida, P.O. Box 116300, Gainesville, FL 32611-6300

D. Yogi Goswami

Mechanical and Aerospace Engineering Department, Solar Energy and Energy Conversion Laboratory, University of Florida, P.O. Box 116300, Gainesville, FL 32611-6300goswami@ufl.edu

J. Heat Transfer 129(2), 154-161 (May 26, 2006) (8 pages) doi:10.1115/1.2402182 History: Received September 16, 2005; Revised May 26, 2006

This paper presents an experimental study of a new concept of using a screen mesh to enhance heat and mass transfer in a microchannel falling film absorber. Results of the experiments on the conventional and mesh-enhanced microchannel absorber designs are then reported. The experimental study shows that the absorber heat load for the mesh-enhanced design is about 17%±3.4%26%±3.8% higher than a conventional microchannel design. The paper also presents a comparison of the experimental results with a numerical model. A finite difference scheme is used to model the heat and mass transfer processes in a falling film absorber. The numerical model agrees well with experimental results with some deviation at low temperature of coolant and high flow rate of weak solution.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Conventional horizontal tube type falling film absorber

Grahic Jump Location
Figure 2

Mesh-enhanced horizontal tube type falling film absorber

Grahic Jump Location
Figure 3

Photographs of the coolant assembly: (A) external view of the tubular array housed in an aluminum casing; (B) internal view of the microchannel array; (C) internal view of the microchannel array with screen mesh; and (D) closer view of the screen mesh stretched in between the tubes

Grahic Jump Location
Figure 4

Schematic of the experimental setup

Grahic Jump Location
Figure 5

Absorber heat duty with the variation in weak solution flow rate

Grahic Jump Location
Figure 6

Variation of UA with the weak solution flow rate

Grahic Jump Location
Figure 7

Absorber heat duty with the variation in inlet coolant temperature

Grahic Jump Location
Figure 8

Variation of UA with the inlet coolant temperature

Grahic Jump Location
Figure 9

Comparison of numerical and experimental results for the variation in weak solution flow rate

Grahic Jump Location
Figure 10

Comparison of numerical and experimental results for the variation in inlet coolant temperature

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In