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TECHNICAL PAPERS

Combined Heat and Mass Transfer Under Different Inlet Subcooling Modes During NH3-H2O Falling Film Absorption Process

[+] Author and Article Information
Y. T. Kang

School of Mechanical and Industrial Systems Engineering, Industrial Liaison Research Institute, Kyung Hee University, Kyung-Gi 449-701, Koreae-mail:ytkang@khu.ac.kr

Y. Fujita, T. Kashiwagi

Department of Mechanical Systems Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan

J. Energy Resour. Technol 123(3), 242-249 (Mar 08, 2001) (8 pages) doi:10.1115/1.1377895 History: Received October 01, 2000; Revised March 08, 2001
Copyright © 2001 by ASME
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References

Perez-Blanco,  H. A., 1988, “A Model of an Ammonia-Water Falling Film Absorber,” ASHRAE Trans., 94(1), pp. 467–483.
Arman, B., and Panchal, C. B., “Absorption Analysis of Ammonia in an Aqueous Solution,” 28th IECE Conference Proc. 1 , pp. 873–878.
Kang, Y. T., and Christensen, R. N., 1994, “Development of a Counter-Current Model for a Vertical Fluted Tube GAX Absorber,” Proc. International Absorption Heat Pump Conference, ASME, AES-Vol. 31, pp. 7–16.
Lu, D. C., and Lee, C. C., 1994, “Investigation of Condensation Heat Transfer of Nonazeotropic Refrigerant Mixtures in a Horizontal Tube,” Proc., 10th International Heat Transfer Conference, Brighton, UK, 3 , pp. 353–358.
Kang,  Y. T., Chen,  W., and Christensen,  R. N., 1997, “A Generalized Design Model by Combined Heat and mass Transfer Analysis in NH3-H2O Absorption Heat Pump Systems,” ASHRAE Trans., 103(1), pp. 444–453.
Hoffmann, L., and Ziegler, F., 1996, “Experimental Investigation of Heat and Mass Transfer With Aqueous Ammonia,” Proc., International Absorption Heat Pump Conference, 1 , Montreal, Canada, September 17–20, pp. 383–392.
Rivera, W., Best, R., and Velez, V., 1996, “Experimental Heat Transfer Coefficients in Two Phase Flow for the Ammonia-Water and Ammonia-Lithium Nitrate Mixtures,” Proc., International Absorption Heat Pump Conference, Montreal, Canada, September 17–20, 1 , pp. 327–334.
Kang,  Y. T., Fujita,  Y., Akisawa,  A., and Kashiwagi,  T., 1998, “Effects of Vapor Flow Characteristics on NH3-H2O Falling Film Absorption Rate,” Trans. J. Japanese Association Refrigeration, 15(4), pp. 381–389.
Kang,  Y. T., Akisawa,  A., and Kashiwagi,  T., 1999, “Experimental correlation of Combined Heat and Mass Transfer for NH3-H2O Falling Film Absorption,” Int. J. Refrig., 22, pp. 250–262.
Ziegler,  B., and Trepp,  Ch., 1984, “Equation of State of Ammonia-Water Mixtures,” Int. J. Refrig., 7(2), pp. 101–106.
Kays, W. M., and London, A. L., 1984, Compact Heat Exchanger, Ch. 10, 3rd Edition, McGraw-Hill Book Company, New York, NY.
Garimella,  S., and Christensen,  R. N., 1995, “Heat Transfer and Pressure Drop Characteristics of Spirally Fluted Annuli: Part II—Heat Transfer,” ASME J. Heat Transfer, 117, pp. 61–68.
Chen,  W., and Christensen,  R. N., 2000, “Inlet Subcooling Effect on Heat and Mass Transfer Characteristics in a Laminar Film Flow,” Int. J. Heat Mass Transf., 43, pp. 167–177.
Kang,  Y. T., Akisawa,  A., and Kashiwagi,  T., 2000, “Analytical Investigation of Two Different Absorption Modes: Falling Film and Bubble Types,” Int. J. Refrig., 23, pp. 430–443.
Herbine,  G. S., and Perez-Blanco,  H., 1995, “Model of an Ammonia-Water Bubble Absorber,” ASHRAE Trans., 101(1), pp. 956–967.
Kang, Y. T., Kazuno, H., Ono, K., Akisawa, A., and Kashiwagi, T., 1999, “Visualization of Ammonia-Water Absorption Process Using Holographic Interferometer,” Proc., 2nd Pacific Symposium on Flow Visualization and Image Processing, Paper No. PF 150.
Kang,  Y. T., Stout,  R., and Christensen,  R. N., 1997, “Experimental Investigation on Flooding in a Fluted Tube With and Without a Twisted Insert,” J. Enhanced Heat Transfer, 4(2), pp. 111–129.

Figures

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Liquid and vapor temperature profiles (a) at the test section for Case A, (b) at the test section for Case C
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Representative temperature and concentration profiles for rectification and absorption processes—(a) rectification process, (b) absorption process
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The effect of inlet subcooling of liquid flow on heat transfer coefficient
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The effect of inlet concentration difference on heat transfer coefficient
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Control volume for the test section
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Schemetic diagram of the rectangular fin and OSF—(a) rectangular plain fin, (b) offset strip fin
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Schematic diagram and geometric details of the test section (all units are in mm)
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Schematic diagram of the experimental apparatus
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The effect of falling film Reynolds number on Nusselt number
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The effect of vapor Reynolds number on Nusselt number

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