Performance Improvement of Integrated Coal Gasification Combined Cycle by a New Approach in Exergy Analysis

Jong-Jin Kim; Myoung-Ho Park; Chul Kim

Korean Journal of Chemical Engineering, Vol.18, No.1, 94-100, January, 2001

DOI10.1007/BF02707204 Export Citation

Performance Improvement of Integrated Coal Gasification Combined Cycle by a New Approach in Exergy Analysis

Jong-Jin Kim, Myoung-Ho Park¹, and Chul Kim^{1, †}

Power Generation Laboratory, Korean Electric Power Institute, Taejon 305-380, Korea
¹Department of Energy Studies, Ajou University, Suwon 442-749, Korea

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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 gamma (AVO), 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.

Keywords:Energy;Exergy;Aspen Plus;Avoidable Exergy Consumption;Integrated Coal Gasification Combined Cycle

[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, Bram S, Energy Conv. Manag., 38, 15 (1997)
Feng X, Zhu X, Zheng J, "Practical Exergy Method for System Analysis," 31th IECEC, 2068 (1996)
Johnson MS, "The Effects of Gas Turbine Characteristics on Integrated Gasification Combined-cycle Power Plant Performance," Ph.D. Dissertation, Stanford University. California (1989)
Kim JJ, Park MH, Ahn DH, Kim NH, Song KS, Kim CY, Energy Eng. J., 5(1), 8 (1996)
Kim JJ, Park MH, Kim HS, Kim CY, Theor. Appl. Chem. Eng., 2(1), 581 (1996)
Kim JJ, Park MH, Song KS, Cho SK, Seo SB, Kim CY, Energy Eng. J., 6(1), 104 (1997)
Lobachyov K, Richter HJ, ASMEAES, 35, 231 (1995)
Lozza G, Chiesa P, Devita D, J. Eng. Gas Turbines Power, 118, 737 (1996)
Rosen MA, "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 MA, ASME AES, 1, 71 (1985)
Stone KR, "ASPEN Simulation of Fludized-bed Entrained-flow Integrated Gasification Combined-Cycle Power Plants, Technical Notes," U.S. Department of energy, Morgantown Energy Technology Center, Mogantown West Virginia, METC, 85, 4027 (1985)
Szargut J, Morris DR, Steward FR, "Energy Analysis of Thermal, Chemical, and Metallurgical Process," Hemisphere, 41 (1988)
Tawfik T, Tsatsaronis G, Price DW, Am. Power Conference, 1772 (1993)
Tsatsaronis G, Lin L, Pisa J, ASME AES, 27, 56 (1992)
Tsatsaronis G, Tawfik T, Lin L, Pisa J, ASME AES, 27, 37 (1992)
Woudstra T, Woudstra N, J. Inst. Energy, 68(476), 157 (1995)

[Referenced By]

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[1] ABB Lummus, "Heat Transfer Corp," APEX manual. Hague, Netherland (1993)

[2] Bechtel, "Power Corporation. IGCC Process Evaluation for KEPRI," Gaithersberg, USA (1995)

[3] De Ruyck J, Bram S, Energy Conv. Manag., 38, 15 (1997)

[4] Feng X, Zhu X, Zheng J, "Practical Exergy Method for System Analysis," 31th IECEC, 2068 (1996)

[5] Johnson MS, "The Effects of Gas Turbine Characteristics on Integrated Gasification Combined-cycle Power Plant Performance," Ph.D. Dissertation, Stanford University. California (1989)

[6] Kim JJ, Park MH, Ahn DH, Kim NH, Song KS, Kim CY, Energy Eng. J., 5(1), 8 (1996)

[7] Kim JJ, Park MH, Kim HS, Kim CY, Theor. Appl. Chem. Eng., 2(1), 581 (1996)

[8] Kim JJ, Park MH, Song KS, Cho SK, Seo SB, Kim CY, Energy Eng. J., 6(1), 104 (1997)

[9] Lobachyov K, Richter HJ, ASMEAES, 35, 231 (1995)

[10] Lozza G, Chiesa P, Devita D, J. Eng. Gas Turbines Power, 118, 737 (1996)

[11] Rosen MA, "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)

[12] Rosen MA, ASME AES, 1, 71 (1985)

[13] Stone KR, "ASPEN Simulation of Fludized-bed Entrained-flow Integrated Gasification Combined-Cycle Power Plants, Technical Notes," U.S. Department of energy, Morgantown Energy Technology Center, Mogantown West Virginia, METC, 85, 4027 (1985)

[14] Szargut J, Morris DR, Steward FR, "Energy Analysis of Thermal, Chemical, and Metallurgical Process," Hemisphere, 41 (1988)

[15] Tawfik T, Tsatsaronis G, Price DW, Am. Power Conference, 1772 (1993)

[16] Tsatsaronis G, Lin L, Pisa J, ASME AES, 27, 56 (1992)

[17] Tsatsaronis G, Tawfik T, Lin L, Pisa J, ASME AES, 27, 37 (1992)

[18] Woudstra T, Woudstra N, J. Inst. Energy, 68(476), 157 (1995)