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Technical Briefs

Thermodynamic Performance Assessment of Gas Turbine Trigeneration System for Combined Heat Cold and Power Production

[+] Author and Article Information
Abdul Khaliq1

Department of Mechanical Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia, New Delhi 110025, Indiaabḏkhaliq2001@yahoo.co.in

Rajesh Kumar

Mechanical and Automation Engineering Department, Amity School of Engineering and Technology, GGSIPU, New Delhi 110061, India

1

Corresponding author.

J. Eng. Gas Turbines Power 130(2), 024501 (Feb 29, 2008) (4 pages) doi:10.1115/1.2771565 History: Received December 04, 2006; Revised May 21, 2007; Published February 29, 2008

The thermodynamic performance of the combustion gas turbine trigeneration system has been studied based on first law as well as second law analysis. The effects of overall pressure ratio and process heat pressure on fuel utilization efficiency, electrical to thermal energy ratio, second law efficiency, and exergy destruction in each component are examined. Results for gas turbine cycle, cogeneration cycle, and trigeneration cycle are compared. Thermodynamic analysis indicates that maximum exergy is destroyed during the combustion and steam generation process, which represents over 80% of the total exergy destruction in the overall system. The first law efficiency, electrical to thermal energy ratio, and second law efficiency of trigeneration system, cogeneration system, and gas turbine cycle significantly varies with the change in overall pressure ratio but the change in process heat pressure shows small variations in these parameters. Results clearly show that performance evaluation of the trigeneration system based on first law analysis alone is not adequate and hence more meaningful evaluation must include second law analysis.

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Copyright © 2008 by American Society of Mechanical Engineers
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Grahic Jump Location
Figure 1

Schematic diagram of the gas turbine trigeneration system for combined heat cold and power production

Grahic Jump Location
Figure 2

Effect of variation of pressure ratio on first law efficiency, second law efficiency, and electrical to thermal energy ratio

Grahic Jump Location
Figure 3

Effect of variation of process heat pressure on first law efficiency, second law efficiency, and electrical to thermal energy ratio

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