Thermodynamic performance evaluation of combustion gas turbine cogeneration system with reheat

2004 ◽  
Vol 24 (13) ◽  
pp. 1785-1795 ◽  
Author(s):  
A Khaliq ◽  
S.C Kaushik
Keyword(s):  
Performance Evaluation ◽  
Gas Turbine ◽  
Combustion Gas ◽  
Thermodynamic Performance ◽  
Cogeneration System

Performance Evaluation of Selected Combustion Gas Turbine Cogeneration Systems Based on First and Second-Law Analysis

1990 ◽  
Vol 112 (1) ◽  
pp. 117-121 ◽  
Author(s):  
F. F. Huang
Keyword(s):  
Performance Evaluation ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Decision Makers ◽  
Utilization Efficiency ◽  
Second Law ◽  
Pinch Point ◽  
Combustion Gas ◽  
Second Law Analysis ◽  
Industrial Gas Turbines

The thermodynamic performance of selected combustion gas turbine cogeneration systems has been studied based on first-law as well as second-law analysis. The effects of the pinch point used in the design of the heat recovery steam generator, and pressure of process steam on fuel-utilization efficiency (first-law efficiency), power-to-heat ratio, and second-law efficiency, are examined. Results for three systems using state-of-the-art industrial gas turbines show clearly that performance evaluation based on first-law efficiency alone is inadequate. Decision makers should find the methodology contained in this paper useful in the comparison and selection of cogeneration systems.

scholarly journals The Effect of Thermal Matching on the Thermodynamic Performance of Gas Turbine and IC Engine Cogeneration Systems

1985 ◽  
Author(s):  
J. W. Baughn ◽  
N. Bagheri
Keyword(s):  
Gas Turbine ◽  
Combustion Engine ◽  
Full Range ◽  
Operating Conditions ◽  
Hot Water ◽  
Ic Engine ◽  
Thermal Output ◽  
Savings Rate ◽  
Thermodynamic Performance ◽  
Cogeneration System

Computer models have been used to analyze the thermodynamic performance of a gas turbine (GT) cogeneration system and an internal combustion engine (IC) cogeneration system. The purpose of this study was to determine the effect of thermal matching of the load (i.e., required thermal energy) and the output steam fraction (fraction of the thermal output, steam and hot water, which is steam) on the thermodynamic performance of typical cogeneration systems at both full and partial output. The thermodynamic parameters considered were; the net heat rate (NHR), the power to heat ratio (PHR), and the fuel savings rate (FSR). With direct use (the steam fractions being different); the NHR of these two systems is similar at full output, the NHR of the IC systems is lower at partial output, and the PHR and the FSR of the GT systems is lower than the IC systems over the full range of operating conditions. With thermal matching (to produce a given steam fraction) the most favorable NHR, PHR, and FSR depends on the method of matching the load to the thermal output.

A Comparison of the Predicted and Measured Thermodynamic Performance of a Gas Turbine Cogeneration System

1987 ◽  
Vol 109 (1) ◽  
pp. 32-38 ◽  
Author(s):  
J. W. Baughn ◽  
R. A. Kerwin
Keyword(s):  
Electric Power ◽  
Gas Turbine ◽  
Computer Model ◽  
Measurement Techniques ◽  
Actual Performance ◽  
Fuel Flow ◽  
Savings Rate ◽  
Thermodynamic Performance ◽  
Cogeneration System ◽  
Steam Production

The thermodynamic performance of a gas turbine cogeneration system is predicted using a computer model. The predicted performance is compared to the actual performance, determined by measurements, in terms of various thermodynamic performance parameters which are defined and discussed in this paper. These parameters include the electric power output, fuel flow rate, steam production, electrical efficiency, steam efficiency, and total plant efficiency. Other derived parameters are the net heat rate, the power-to-heat ratio, and the fuel savings rate. This paper describes the cogeneration plant, the computer model, and the measurement techniques used to determine each of the necessary measurands. The predicted and the measured electric power compare well. The predicted fuel flow and steam production are less than measured. The results demonstrate that this type of comparison is needed if computer models are to be used successfully in the design and selection of cogeneration systems.

The Effect of Thermal Matching on the Thermodynamic Performance of Gas Turbine and IC Engine Cogeneration Systems

1987 ◽  
Vol 109 (1) ◽  
pp. 39-45 ◽  
Author(s):  
J. W. Baughn ◽  
N. Bagheri
Keyword(s):  
Gas Turbine ◽  
Combustion Engine ◽  
Full Range ◽  
Operating Conditions ◽  
Hot Water ◽  
Ic Engine ◽  
Thermal Output ◽  
Savings Rate ◽  
Thermodynamic Performance ◽  
Cogeneration System

Computer models have been used to analyze the thermodynamic performance of a gas turbine (GT) cogeneration system and an internal combustion engine (IC) cogeneration system. The purpose of this study was to determine the effect of thermal matching of the load (i.e., required thermal energy) and the output steam fraction (fraction of the thermal output, steam and hot water, which is steam) on the thermodynamic performance of typical cogeneration systems at both full and partial output. The thermodynamic parameters considered were: the net heat rate (NHR), the power-to-heat ratio (PHR), and the fuel savings rate (FSR). With direct use (the steam fractions being different), the NHR of these two systems is similar at full output, the NHR of the IC systems is lower at partial output, and the PHR and the FSR of the GT systems are lower than those of the IC systems over the full range of operating conditions. With thermal matching (to produce a given steam fraction) the most favorable NHR, PHR, and FSR depend on the method of matching the load to the thermal output.

Performance Characteristics of Indirect-Fired Gas Turbine/Cogeneration Cycles

1982 ◽  
Author(s):  
J. C. Lee
Keyword(s):  
Gas Turbine ◽  
Pressure Ratio ◽  
Inlet Temperature ◽  
Closed Cycle ◽  
Design Point ◽  
Partial Load ◽  
Thermodynamic Performance ◽  
Cogeneration System ◽  
Open Cycle ◽  
Cogeneration Cycle

General characteristics equations for cogeneration cycle thermodynamic performance were derived and expressed as functions of the power-to-heat ratio. Based on these equations, design point performance of indirect-fired open-cycle and closed-cycle gas turbine/cogeneration systems were analyzed and compared with those of steam turbine/cogeneration system. Effects of gas turbine pressure ratio and inlet temperature on design point performance were evaluated. Off-design partial load performances of the three cogeneration systems using various control modes were also investigated. Results indicated significant efficiency advantage of the closed-cycle gas turbine/cogeneration system over the others for both design and off-design operations.

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