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Research Papers

Thermal Performance Prediction of a Biomass Based Integrated Gasification Combined Cycle Plant

[+] Author and Article Information
T. Srinivas1 n2

Energy Division, School of Mechanical and Building Sciences,  VIT University, Vellore 632 014, Indiasrinivastpalli@yahoo.co.in

B. V. Reddy

Faculty of Engineering and Applied Sciences,  University of Ontario Institute of Technology, Oshawa, ON, L1H 7K4, Canada

A. V. S. S. K. S. Gupta

Department of Mechanical Engineering,  JNTU College of Engineering, Kukatpally, Hyderabad 500 080, India

1

Corresponding author.

2

Present address: Faculty of Engineering and Applied Sciences, University of Ontario Institute of Technology, Oshawa, ON, L1H 7K4, Canada.

J. Energy Resour. Technol 134(2), 021002 (Mar 19, 2012) (9 pages) doi:10.1115/1.4006042 History: Received July 06, 2010; Revised January 30, 2012; Published March 19, 2012; Online March 19, 2012

The performance characteristics of a rice husk based integrated gasification combined cycle (IGCC) plant has been developed at the variable operating conditions of gasifier. A thermo-chemical model developed by the authors has been applied for wet fuel (fuel with moisture) for predicting the gas composition, gas generation per kg of fuel, plant efficiency and power generation capacity, and NOx and CO2 emissions. The effect of the relative air fuel ratio (RAFR), steam fuel ratio (SFR), and gasifier pressure has been examined on the plant electrical efficiency, power output, and NOx and CO2 emissions of the plant with and without supplementary firing (SF) between gas turbine (GT) outlet and heat recovery steam generator (HRSG). The optimum working conditions for efficient running of the IGCC plant are 0.25 RAFR, 0.5 SFR, and 11 bar gasifier pressure at the GT inlet temperature of 1200 °C. The optimum operational conditions of the gasifier for maximum efficiency condition are different compared to maximum power condition. The current IGCC plant results 264.5 MW of electric power with the compressor air flow rate of 375 kg/s at the existed conventional combined cycle plant conditions (Srinivas , 2011, “Parametric Simulation of Combined Cycle Power Plant: A Case Study,” Int. J. Thermodyn. 14 (1), pp. 29–36). The optimum compressor pressure ratio increases with increase in GT inlet temperature and decreases with addition of SF.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic flow diagram of a biomass based IGCC plant

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Figure 2

Performance characteristics of rice husk based IGCC plant with variants of RAFR and SFR (a) without SF and (b) with SF

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Figure 3

Performance characteristics of rice husk based IGCC plant with variants of RAFR and gasifier pressure (a) without SF and (b) with SF

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Figure 4

Performance characteristics of rice husk based IGCC plant with variants of gas turbine inlet temperature and compressor pressure ratio (a) without SF and (b) with SF

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Figure 5

Effect of RAFR and SFR on NOX and CO2 emissions of rice husk based IGCC plant (a) without SF and (b) with SF

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Figure 6

Effect of RAFR and gasifier pressure on NOX and CO2 emissions of rice husk based IGCC plant (a) without SF and (b) with SF

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