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Performance analysis of an adsorption heat pump: SWS-1L composite adsorbent/water as the working pair
|關鍵字:||adsorption heat pump;吸附式熱泵;COP;specific cooling capacity;adsorption heat;exergy;second law of thermodynamics;冷卻性能係數;冷卻能力;吸附熱;Exergy;熱力學第二定律效率||出版社:||機械工程學系所||引用:||1. F. Meunier, “Solid sorption heat powered cycles for cooling and heat pumping applications”, Applied Thermal Engineering, Vol. 18, pp. 715-729, 1998. 2. N.C. Srivastava, I.W. Eames, “A review of adsorbents and adsorbates in solid-vapour adsorption heat pump systems”, Applied Thermal Engineering, Vol. 18, pp. 707-714, 1998. 3. S.G. Wang, R.Z. Wang, X.R. Li, “Research and development of consolidated adsorbent for adsorption systems”, Renewable Energy, Vol. 30, pp. 1425-1441, 2005. 4. L. Yong, K. Sumathy, “Review of mathematical investigation on the closed adsorption heat and cooling systems”, Renewable and Sustainable Energy Reviews, Vol. 6, pp. 305-337, 2002. 5. G. Cacciola, G. Restuccia, “Reversible adsorption heat pump: a thermodynamic model”, International Journal of Refrigeration, Vol. 18, pp.100-106, 1995. 6. G. 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Beyene, “Thermo-economic analysis of solar powered adsorption heat pump”, Applied Thermal Engineering, Vol. 27, pp. 1593-1611, 2007. 35. 吳良箴，雙塔式活性碳吸附系統對甲苯吸附性能之模擬分析，碩士論文，中興大學機械系，1996. 36. K. J. Sladek, E. R. Gilliland, R. F. Baddour, “Diffusion on surface. II.Correlation of diffusivities of physically and chemically adsorbed species”, Industrial and Engineering Chemistry Fundamentals, Vol. 13, pp. 100-105, 1974. 37. 林瑋旻，吸附配對之特性對熱泵性能之影響，碩士論文，中興大學機械所，2006. 38. D. M. Ruthven, Principles of Adsorption, Chapter 3, Wiley, 1984. 39. J. M. Smith, H. C. Van Ness, M. M. Abbott, Chemical Engineering Thermodynamics (sixth edition), Chapter 4, McGraw-Hill, 2001. 40. J. Y. San, Exergy Analysis of Desiccant Cooling System, doctoral dissertation, University of Illinois-Chicago, 1985.||摘要:||
Two work deals with the computer analysis of the COP and specific cooling capacity (QE) of a muti-bed adsorption heat pump, which was a composite adsorbent in adsorbing water. A second-law analysis was also conducted to analyze the exergy loss in the heat pump. The computer analysis adopted a solid-side mass-diffusion resistance model. A composite adsorbent (KSK silica gel impregnated with CaCl2) and water were selected as the adsorption pair. The temperature of cooling/heating fluid is a function of location and time and the adsorption heat is a function of adsorbent temperature (Tb), and refrigerant content (W). In the analysis, the effect of cycle time (4τ) and regeneration temperature (TG) on the COP and QE were investigated. The result reveals that, at the maximum QE, using the composite adsorbent can effectively upgrade the COP up to 51% and the QE up to 38.4%. The moving heating source is expressed as exergy input to the adsorber. At the TG of 100℃ and τ of 360 seconds, the result shows that the second-law efficiency of the heat pump is 20.4%. The exergy loss is mainly induced in the preheating process and precooling process. The former results in a 28.96% of the total loss and the latter is 41.55%.
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