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TECHNICAL PAPERS

Study of the Effects of Mass and Heat Recovery on the Performances of Activated Carbon/Ammonia Adsorption Refrigeration Cycles

[+] Author and Article Information
T. F. Qu, W. Wang, R. Z. Wang

Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200030 P.R. China

J. Sol. Energy Eng 124(3), 283-290 (Aug 01, 2002) (8 pages) doi:10.1115/1.1487883 History: Received May 01, 2000; Revised July 01, 2001; Online August 01, 2002
Copyright © 2002 by ASME
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References

Pons,  M., Meunier,  F., and Cacciola,  G., , 1999, “Thermodynamic Based Comparison of Sorption Systems for Cooling and Heat Pumping,” Int. J. Refrig., 22, pp. 5–17.
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Wang,  R. Z., Wu,  J. Y., Xu,  Y. X., and Wang,  W., 2001, “Performance Researches and Improvements on Heat Regenerative Adsorption Recovery and Heat Pump,” Energy Convers. Manage., 42(2), pp. 233–249.
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van Benthem,  G. H. W., Cacciola,  G., and Restaccia,  G., 1995, “Regenerative Adsorption Heat Pumps: Optimization of the Design,” Heat Recovery Syst. CHP, 15, pp. 531–544.
Shelton,  S. V., Wepfer,  W. J., and Miles,  D. J., 1990, “Ramp Wave Analysis of the Solid/Vapor Heat Pump,” ASME J. Energy Resour. Technol., 112, pp. 69–78.
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Turner, L., 1992, “Improvement of Activated Charcoal-Ammonia Adsorption Heat Pumping/Refrigeration Cycles,” Ph.D. thesis, Warwick Univ.
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Figures

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P-T-X diagram of the intermittent and heat recovery cycle
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Schematic system for basic cycle; the dashed line represents thermal fluid flow
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Schematic system of heat recovery cycle; the dashed line represents thermal fluid flow
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Diagram of mass recovery process and combined cycle with heat and mass recovery
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Schematic system of mass recovery/heat and mass recovery cycle; the dashed line represents thermal fluid flow. The solid line and valve between the adsorbers processes mass recovery, and the dashed line between adsorbers processes heat recovery.
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COPs of different cycles: – heat and mass recovery cycle; —▪— basic cycle; —▾— heat recovery cycle; —×— mass recovery cycle
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Photograph of the prototype machine
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Augmentation of cooling capacity of mass recovery cycle with different heat capacity ratio: Rm —▪— 8; —▴—5.8; —×— 0
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Relative cop of mass recovery cycle with different heat capacity ratio: Rm —▪— 8; —▴— 5.8; —×— 0
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Proportion of enlarged cooling capacity of mass recovery cycle with various condensing temperature: Tc/°C —▪— 30; – 35; —▴— 40
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P-T-x diagram of activated carbon/ammonia adsorption
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(a) Percentage of enlarged cooling capacity of mass recovery cycle with various evaporating temperature: Te/°C —▪— 10; —•— 5; —▴— 0—; —×— −5; – −10. (b) Percentage of enlarged cooling capacity of mass recovery cycle with various evaporating temperature: Te/°C —▪— 10; —•— 5; —▴— 0; —×— −5; – −10
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COP ratio of mass recovery cycle to basic cycle with various condensing temperature: Tc/°C —▪— 30; – 35; —▴— 40
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COP ratio of mass recovery cycle to basic cycle with various evaporating temperature: Te/°C —▪— 10; —•— 5; —▴—0; —×— −5; – −10

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