Abstract
A new approach to exergy analysis is proposed for examing the consumption of energy as the minimum driving force and of exergy consumption that is avoidable, and for the development of a method to predict the alternatives in system improvement by exploring possible reduction in the avoidable exergy consumption. Also suggested in this study is a dimensionless parameter γAVO, which is the ratio of avoidable exergy consumption over total fuel energy input to the system. Detailed analyses, including the calculation of exergy consumption, exergy loss and avoidable exergy consumption, were conducted for each component in the syngas cooling system in the Integrated coal Gasification Combined Cycle (IGCC) plant, to prove the effective application of the proposed method. The analysis showed that the rank of avoidable exergy consumption was different from that of total energy consumption, and hence it confirmed that an energy analysis by conventional methods misled the focus of improvement in system design. The methodology developed in this study offers a new approach for system designers to analyze and to improve the performance of a complex energy system such as an IGCC plant.
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References
ABB Lummus, “Heat Transfer Corp”, APEX manual. Hague, Netherland (1993).
Bechtel, “Power Corporation. IGCC Process Evaluation for KEPRI”, Gaithersberg, USA (1995).
De Ruyck, J. and Bram, S., “Exergy Analysis Tools for Aspen Applied to Evaporative Cycle Design”,Energy Conversion and Management,38, 15 (1997).
Feng, X., Zhu, X. and Zheng, J., “Practical Exergy Method for System Analysis”, 31th IECEC, 2068 (1996).
Johnson, M. S., “The Effects of Gas Turbine Characteristics on Integrated Gasification Combined-cycle Power Plant Performance”, Ph.D. Dissertation, Stanford University. California (1989).
Kim, J. J., Park, M. H., Ahn, D. H., Kim, N. H., Song, K. S. and Kim, C. Y., “Thermalperformance Analysis of the Combined Cycle using Coal Gas”,Energy Engineering Journal,5(1), 8 (1996).
Kim, J. J., Park, M. H., Kim, H. S. and Kim, C. Y., “The Effect of IGCC Performance of Coal Compositions using Aspen Plus. Theories and Application of Chemical Engineering”,Korean J. Chem. Eng.,2, 581 (1996).
Kim, J. J., Park, M. H., Song, K. S., Cho, S. K., Seo, S. B. and Kim, C. Y., “Shell IGCC Performance Analysis”,Energy Engineering Journal,6(1), 104 (1997).
Lobachyov, K. and Richter, H. J., “Combined Cycle Gas Turbine Power Plant with Coal Gasification and Solid Oxide Fuel Cell”,ASME AES,35, 231 (1995).
Lozza, G., Chiesa, P. and Devita, D., “Combined Cycle Power Stations using “Clean-coal Technologies”: Thermodynamics Analysis of Full Gasification Versus Fluidized Bed Combustion with Partial Gasification”,J. of Engineering for Gas Turbines and Power,118, 737 (1996).
Rosen, M. A., “The Development and Application of a Process Analysis Methodology and Code Based on Energy, Cost, Energy and Mass”, Ph.D. Thesis, University of Toronto, 37 (1986).
Rosen, M. A., “The Enhancement of a Process Simulator for Complete Energy-exergy Analysis”,ASME AES,1, 71 (1985).
Stone, K. R., “ASPEN Simulation of Fludized-bed and Entrained-flow Integrated Gasification Combined-Cycle Power Plants, Technical Notes”, U.S. Department of energy, Morgantown Energy Technology Center, Morgantown West Virginia, METC,85, 4027 (1985).
Szargut, J., Morris, D. R. and Steward, F. R., “Energy Analysis of Thermal, Chemical, and Metallurgical Process”, Hemisphere, 41 (1988).
Tawfik, T., Tsatsaronis, G. and Price, D. W., “Performance Comparisons of IGCC Power Plants”,American Power Conference, 1772 (1993).
Tsatsaronis, G., Lin, L. and Pisa, J., “Optimization of an IGCC Power Plant: Part 2-Methodology and Parametric Studies”, ASME AES,27, 56 (1992).
Tsatsaronis, G., Tawfik, T., Lin, L. and Pisa, J., “Optimization of an IGCC Power Plant; Part 1-Optimized Cases”,ASME AES,27, 37 (1992).
Woudstra, T. and Woudstra, N., “Energy Analysis of Hot Gas Cleanup in IGCC Systems”,J. of the Institute of Energy,68, 157 (1995).
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Kim, JJ., Park, MH. & Kim, C. Performance improvement of integrated coal gasification combined cycle by a new approach in exergy analysis. Korean J. Chem. Eng. 18, 94–100 (2001). https://doi.org/10.1007/BF02707204
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DOI: https://doi.org/10.1007/BF02707204