Authors: Sunday O. Oyedepo; Richard O. Fagbenle; Samuel S. Adefila; Mahbub Md. Alam; Israel S. Dunmade
Addresses: Department of Mechanical Engineering, Covenant University, Nigeria ' Department of Mechanical Engineering, University of Ibadan, Nigeria ' Department of Chemical Engineering, Covenant University, Nigeria ' Institute for Turbulence-Noise-Vibration Interaction and Control, Harbin Institute of Technology, Shenzhen, China ' Faculty of Science & Technology, Mount Royal University, Calgary, AB T3K 0C3, Canada
Abstract: This study aims at thermo-economic and environmental assessment of selected gas turbine power plants in Nigeria using exergy concept. Thermodynamic, economic and environmental analyses were conducted using operating data collected from the selected power plants to determine the exergy destruction of each major component of the gas turbine in each plant and CO2 emissions with cost rate of environmental impacts. The results of the study show that the combustion chamber is the most exergy destructive component compared to other cycle components. Thermo-economic analysis shows that the cost of exergy destruction is high in the combustion chamber, and an increase in the GTIT effectively decreases this cost. Environomic analysis shows that the CO2 emissions varied between 100.18 to 408.78 kgCO2/MWh while cost rate of environmental impact varies from 40.18 $/h (N6, 388.62/h) to 276.97 $/h (N44, 038. 23/h). The results further show that CO2 emissions and cost of environmental impact decrease with increasing GTIT.
Keywords: exergy analysis; economic analysis; environmental impact; CO2 emissions; sustainability index.
Progress in Industrial Ecology, An International Journal, 2018 Vol.12 No.4, pp.361 - 384
Received: 23 Sep 2017
Accepted: 22 Aug 2018
Published online: 02 Jan 2019 *