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TECHNICAL PAPERS: Heat and Mass Transfer

Second Law Based Optimization of Falling Film Single Tube Absorption Generator

[+] Author and Article Information
S. Jani, M. H. Saidi, A. A. Mozaffari

Center of Excellence in Energy Conversion, School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran, P.O. Box. 11365-9567

J. Heat Transfer 126(5), 708-712 (Nov 16, 2004) (5 pages) doi:10.1115/1.1795791 History: Received September 11, 2002; Revised November 25, 2003; Online November 16, 2004
Copyright © 2004 by ASME
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References

Kocamustafaogullari,  G., and Chen,  I. Y., 1988, “Falling Film Heat Transfer Analysis on a Bank of Horizontal Tube Evaporator,” AIChE J., 34(9), pp. 1539–1549.
Wang, C. Q., Lu, Z., Li, D. Q., Yu-CHI, B., and Sun, Y. G., 1995, “Heat and Mass Transfer in Falling Film Generator of LiBr Absorption Refrigeration Machine,” Proceeding of 19th International Congress of Refrigeration, Vol. IIIa, pp. 209–214.
Kim,  D. K., and Kim,  M. H., 1999, “Heat Transfer Enhancement Characteristics for Falling Film Evaporation on Horizontal Enhanced Tubes With Aqueous LiBr Solution,” J. Enhanced Heat Transfer, 16(1), pp. 66–69.
Jani,  S., Saidi,  M. H., Mozafari,  A., and Heydari,  A., 2004, “Modeling of Heat and Mass Transfer in Falling Film Absorption Generators,” Scientia Iranica, 11(1&2), 81–91.
Bejan, A., 1995, Entropy Generation Minimization, CRC Press, p. 47.
Hirschfelder, J. O., Curtiss, F. C., and Bird, R. B., 1954, Molecular Theory of Gases and Liquids, Wiley, New York, p. 700.
Heydari, A., Babadi, F., Jani, S., and Bafkar, R., 2000, “Second Law Based Thermodynamics Analysis of a Lithium Bromide Absorption Chiller,” Proceeding of 4th International and 8th Annual Conference of Iranian Society of Mechanical Engineers, 3 , pp. 403–408.
Heydari, A., and Jani, S., 2001, “Entropy-Minimized Optimization of an Automotive Air Conditioning and HVAC System,” SAE Technical Paper Series, 2001-01-0592.
San,  J. Y., Worek,  W. M., and Lavan,  Z., 1987, “Entropy Generation in Combined Heat and Mass Transfer,” Int. J. Heat Mass Transfer, 30(7), pp. 1359–1369.
Chandra,  P. G., and Sharma,  C. P., “Entropy Values of Lithium Bromide-Water Solution and Their Vapors,” ASHRAE Trans., 2404, pp. 35–46.
Vanderplaats, G. N., 1987, Numerical Optimization Techniques for Engineering Design, McGraw-Hill, p. 140.
Marsden, J. E., and Tromba A. J., 1996, Vector Calculus, Freeman Company.

Figures

Grahic Jump Location
Falling film thermal hydraulic parameters and geometry
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Comparison of numerical and correlated average Nusselt number over a horizontal tube 4
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Comparison of numerical and correlated average evaporation factor over a horizontal tube 4
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Local entropy generation components at film cross section
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Comparison of total entropy generation component as a function of film Reynolds number
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Minimum entropy generation as a function of tube diameter
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Variation of optimum thermal hydraulic parameters as a function of free surface evaporation heat transfer

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