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Tecnologia/Technology Sotomonte et al. Organic Rankine Cycle Associated ... 1) Toluene, 2) Ethylbenzene, 3) Propylbenzene, 4) MDM, 5) MD2M, 6) MD3M, e 7) D6 Figure 8. Exergy destruction by component. CONCLUSIONS The aim of the exergy analysis for a cogeneration power plant is usually to identify and quantify the sites of exergy destruction. Once used, it makes the irreversibility determination easier, identifying the components that cause more exergy destruction in the plant; allowing for the evaluation of the efficiency in each equipment. This information may be used to improve the performance of the system in order to have an effective use of the energy resources and to decide about improvement measures. In general, the values of irreversibilities and exergy efficiencies depend on the working fluid that is being used. The results show that alkylbenzenes, even without heat regenerator, have the highest cycle exergy efficiency and the lowest exergy destruction. Although, those fluids show up more efficiency, they have a higher toxicity and flammability levels. For that reason, it is important to research thoroughly the use of those fluids in this type of energy systems. ACKNOWLEDGEMENTS The authors want to thank to the Coordination of Improvement of Higher Education (CAPES), National Counsel of Technological and Scientific Development (CNPq), and Foundation for Research Support of Minas Gerais State (FAPEMIG) for their [O-Si-(CH3)2]6, Fluid Phase Equilibria, Vol. 263, pp. 115–130. Colonna, P., Nannana, N.R. and Guardone A., Lemmon, E.W., 2006, Multiparameter equations of state for selected siloxanes, Fluid Phase Equilibria, Vol. 244, pp. 193–211. Drescher, U. and Brüggemann, D., 2007, Fluid selection for the Organic Rankine Cycle (ORC) in biomass power and heat plants, Applied Thermal Engineering, Vol. 27, pp. 223 – 228. Duvia, A., Bini, R., Spanring, H. and Portenkirchner, K., 2007, Application of ORC units in the MDF and particleboard sector - general considerations and overview of the experiences of the first ORC in this industry installed at MDF Hallein, in: 15th European Biomass Congress and Exhibition, Berlin, Germany. Kotas, T. J., 1985, The Exergy Method of Thermal Plant Analysis, Departament of Mechanical Enginnering, Queen Mary College, University of London Butterwonths. Poling, B. E., Prausnitz, J. M. and O’connell, J. P., 2004, The properties of gases and liquids, McGraw-Hill, fifth edition. New York, United States, 768 p. Proust, P. and Vera, J. H., 1989, PRSV: The Stryjek-V era Modification of the Peng-Robinson Equation of State. Parameters for Other Pure Compounds of Industrial Interest, The Canadian Journal of Chemical Engineering, Vol. 67, pp. 170- 173. Quoilin, S. and Lemort, V., 2009, Technological and Economical Survey of Organic Rankine Cycle Systems, in: 5th European Conference: Economics and Management of Energy in Industry, Algarve, Portugal. Rentizelas, A., Karellas, S. and Kakaras, E., Tatsiopoulos, I., 2009, Comparative techno-economic analysis of ORC and gasification for bioenergy applications, Energy Conversion and Management, Vol, 50, pp. 674–681. Smith, R., 2005, Chemical process design and Integration, Ed Wiley, second edition. University of Manchester, England, 712 p. Stryjek, R. and Vera, J. H., 1986, PRSV: An Improved Peng- Robinson Equation of State for Pure Compounds and Mixtures, The Canadian Journal of Chemical Engineering, Vol. 64, pp. 323-333. Szargut J., Morris D. R. and Steward F.R., 1988, Exergy Analysis of Thermal Chemical, and Metallurgical Processes, Taylor & Francis Inc. Tsatsaronis, G., 1993, Thermoeconomic Analysis and Optimization of Energy Systems, Progress in Energy and Combustion Systems, Vol 19, pp. 227-257. Zaleta, A. A., Correas, U. L., Kubiak, S.J. and Sierra, E.F.Z., 2007, Concept on Thermoeconomic Evaluation of Steam Turbines, Applied Thermal Engineering, Vol. 27, pp. 457–466. collaboration and financial support development of this work. REFERENCES in the Angelino, Multicomponent working fluids for organic Rankine cycle (ORCs), Energy, Vol. 23, pp. 449-463. Colonna, P., Nannana, N. R. and Guardone A., 2008, Multiparameter equations of state for siloxanes: [(CH3)3-Si-O1/2]2-[O-Si-(CH3)2]i=1,...,3, and G. and Colonna, P ., 1998, 22 Engenharia Térmica (Thermal Engineering), Vol. 10 • No. 01 - 02 • June and December 2011 • p. 15-22PDF Image | ORGANIC RANKINE CYCLE ASSOCIATED WITH AN ABSORPTION CHILLER FOR BIOMASS APPLICATIONS
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