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TECHNICAL PAPERS

A Liquid Desiccant System for Solar Cooling and Dehumidification

[+] Author and Article Information
K. Gommed, G. Grossman

Faculty of Mechanical Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel

J. Sol. Energy Eng 126(3), 879-885 (Jul 19, 2004) (7 pages) doi:10.1115/1.1690284 History: Received May 01, 2003; Revised December 01, 2003; Online July 19, 2004
Copyright © 2004 by ASME
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References

Grossman,  G., and Johannsen,  A., 1981, “Solar Cooling and Air Conditioning,” Prog. Energy Combust. Sci., 7, pp. 185–228.
Grossman,  G., 2002, “Solar-powered Systems for Cooling, Dehumidification and Air-conditioning,” Sol. Energy, 72, pp. 53–62.
Ameel,  T. A., Gee,  K. G., and Wood,  B. D., 1995, “Performance Predictions of Alternative, Low Cost Absorbents for Open-Cycle Absorption Solar Cooling,” Sol. Energy, 54, pp. 65–73.
Nelson,  D. J., and Wood,  B. D., 1989, “Combined Heat and Mass Transfer Natural Convection Between Vertical Parallel Plates,” Int. J. Heat Mass Transfer, 32, pp. 1779–1787.
Nelson,  D. J., and Wood,  B. D., 1989, “Fully Developed Combined Heat and Mass Transfer Natural Convection Between Parallel Plates with Asymmetric Boundary,” Int. J. Heat Mass Transfer, 32, pp. 1789–1792.
Nelson,  D. J., and Wood,  B. D., 1989, “Evaporation Rate Model for a Natural Convection Glazed Collector/Regenerator,” ASME J. Sol. Energy Eng., 112, pp. 51–57.
Kessling, W., 1997, “Luftentfeuchtung und Energiespeicherung mit Salzlösungen in offenen Systemen,” Fortschritt-Bericht 509, VDI Verlag, Düsseldorf, Germany.
Kakabaev,  A., Khandurdyev,  A., Klyshchaeva,  O., and Kurbanov,  N., 1976, “A Large Scale Solar Air-Conditioning Pilot Plant and its Test Results,” Int. Chem. Eng., 16, pp. 60–64.
Kakabaev,  A., Klyshchaeva,  O., Khandurdyev,  A., and Kurbanov,  N., 1977, “Experience in Operation a Solar Absorption Cooling Plant with Open Solution Regenerator,” Geliotekhika, 13, pp. 73–76.
Kakabaev,  A., Kurbanov,  N., Klyshchaeva,  O., and Redzhepov,  G., 1981, “Storage of Cold in an Open-cycle Solar Absorption Cooling System,” Geliotekhika, 17, pp. 64–66.
Collier,  R. K., 1979, “The Analysis and Simulation of an Open Cycle Absorption Refrigeration System,” Sol. Energy, 23, pp. 357–366.
Haim,  I., Grossman,  G., and Shavit,  A., 1992, “Simulation and Analysis of Open Cycle Absorption Systems for Solar Cooling,” Sol. Energy, 49, pp. 515–534.
Gandihdasan,  P., and Al-Farayedhi,  A., 1995, “Thermal Performance Analysis of a Partly Closed-Open Solar Regenerator,” ASME J. Sol. Energy Eng., 117, pp. 151–153.
Gommed, K., Grossman, G., and Ziegler, F., 2002, “Experimental Investigation of a LiCl-Water Open Absorption System for Cooling and Dehumidification,” Proceedings, the 7th International Sorption Heat Pump Conference, Shanghai, China, September 24–27, pp. 391–396. Also ASME Journal of Solar Energy Engineering, May 2004 (In Press).
Grossman,  G., and Wilk,  M., 1994, “Advanced Modular Simulation of Absorption Systems,” Int. J. Refrig., 17, pp. 231–244.
Grossman,  G., and Zaltash,  A., 2001, “ABSIM—Modular Simulation of Advanced Absorption Systems,” Int. J. Refrig., 24, pp. 531–543.
Uemura, T., 1967, “Studies on the LiCl-Water Absorption Refrigeration Machine,” Technology Reports of the Kansai University, Osaka, Japan, 9 , pp. 71–88.
Gommed, K., and Grossman, G., 2004, “Experimental Study of a Liquid Desiccant System for Solar Cooling and Dehumidification,” Presented at EuroSun 2004, Freiburg, Germany, June 22–25.

Figures

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Schematic description of the open-cycle desiccant system
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Humidity ratio of supply air as function of inlet conditions of ambient air to dehumidifier
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Effect of heating water temperature on strong solution concentration at regenerator outlet
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Humidity ratio of supply air as a function of heating and cooling water conditions
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Effect of desiccant solution flow rate in the regenerator on supply air humidity, solution concentration at regenerator outlet and regenerator heat duty
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Humidity ratio of supply air as a function of solution flow rate in the dehumidifier and split ratio in the regenerator
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Coefficient of performance (COP) as a function of heating water temperature for three different cooling water temperatures (ref=29.5°C, per Table 1)

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