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RESEARCH PAPERS: Evaporation, Boiling, and Condensation

A Compact Falling Film Absorber

[+] Author and Article Information
Nitin Goel

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

D. Yogi Goswami

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

J. Heat Transfer 127(9), 957-965 (Apr 03, 2005) (9 pages) doi:10.1115/1.1929781 History: Received August 23, 2004; Revised April 03, 2005

The paper presents a new design of a falling film absorber that could considerably reduce the absorber size without penalizing the vapor and coolant side pressure drops. The proposed design is based on the fundamental characteristics of an efficient absorber design: large liquid-vapor interfacial area and good wetting characteristics. A finite difference scheme is developed to numerically investigate the performance of the design. The results indicate that the proposed design is more compact and efficient than the horizontal tube-type falling film absorber.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 1

Conventional horizontal tube-type falling film absorber

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Figure 2

Proposed falling film absorber (with screen mesh/fabric)

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Figure 3

Schematic of the differential control volume of the proposed design

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Figure 4

Variation of temperature for the proposed falling film absorber

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Figure 5

Variation of temperature for the horizontal tube-type falling film absorber

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Figure 6

Variation of mass flow rate for the proposed falling film absorber

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Figure 7

Variation of mass flow rate for the horizontal tube-type falling film absorber

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Figure 8

Variation of concentration for the proposed falling film absorber

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Figure 9

Variation of concentration for the horizontal tube-type falling film absorber

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