Analysis of gas turbine integrated cogeneration plant: Process integration approach

Cogeneration is defined as generation of two forms of energy viz. heat and work using single primary fuel. Cogeneration or combined heat and power (CHP) is important in improving energy efficiency of the overall plant and in reducing environmental pollution. A methodology, based on pinch analysis, i...

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Bibliographic Details
Published in:Applied thermal engineering 2015-03, Vol.78, p.118-128
Main Authors: Bade, Mukund H., Bandyopadhyay, Santanu
Format: Article
Language:English
Subjects:
Cogeneration
Energy conservation
Energy use
Energy utilization
Fuels
Gas turbine integration
Gas turbines
Pinch analysis
Power plants
Process integration
Shape
Thermodynamic analysis
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Summary:Cogeneration is defined as generation of two forms of energy viz. heat and work using single primary fuel. Cogeneration or combined heat and power (CHP) is important in improving energy efficiency of the overall plant and in reducing environmental pollution. A methodology, based on pinch analysis, is proposed in this paper to integrate gas turbine and regenerator with a process plant to minimize fuel consumption. Thermodynamic analysis of gas turbine integrated CHP plant is presented on gas turbine pressure ratio versus power to heat ratio diagram. On this novel diagram, limits of integration are identified and various regions of integration are represented. Additionally, contour plots of energy utilization factors and fuel energy saving ratios are represented on this diagram for optimal integration of gas turbine with a process plant. It is interesting to note that though the contour plots of energy utilization factors and fuel energy saving ratios differ significantly, loci of the maximal energy utilization factor and the maximal fuel energy saving ratio are identical. Optimum sizing of gas turbine integrated cogeneration plant for grassroots design and retrofitting are performed based on these diagrams. •Methodology for direct integration of gas turbine, regenerator, and process plant.•Integrated system analysis plotted on turbine pressure ratio vs. power to heat ratio.•Regions of integration are identified on this new diagram.•Variations of energy utilization factor and fuel energy saving ratio are indicated.•Optimal sizing of integrated gas turbine for retrofitting and grassroots design.
ISSN:1359-4311
DOI:10.1016/j.applthermaleng.2014.12.024