Exergoenvironomic modelling and performance assessment of selected gas turbine power plants

Oyedepo, Sunday Olayinka and Fagbenle, R. O. and Adefila, S. S, and Alam, Md. M (2016) Exergoenvironomic modelling and performance assessment of selected gas turbine power plants. World Journal of Engineering, 13 (2). pp. 149-162. ISSN 1708-5284

PDF Download (66Kb)

Abstract

Purpose This study aims to use an environomics method to assess the environmental impacts of selected gas turbine power plants in Nigeria. Design/methodology/approach In this study, exergoenvironomic analysis has been carried out to investigate the environmental impact of selected gas turbine power plants in Nigeria from an exergetic point of view. Findings The exergy analysis reveals that the combustion chamber is the most exergy destructive component compared to other cycle components. The exergy destruction of this component can be reduced by increasing gas turbine inlet temperature (GTIT). The results of the study show that thermodynamic inefficiency is responsible for the environmental impact associated with gas turbine components. The study further shows that CO2 emissions and cost of environmental impact decrease with increasing GTIT. Originality/value The exergo-environomic parameters computed in this study are CO2 emission in kg per MWh of electricity generated, depletion number, sustainability index, cost flow rate of environmental impacts (Ċenv) in $/h and total cost rates of products (ĊTot) in $/hr. For the period considered, the CO2emissions for the selected plants vary from 100.18 to 408.78 kgCO2/MWhm, while cost flow rate of environmental impacts varies from $40.18 /h to $276.97 /h and the total cost rates of products vary from $2935.69/h to $12,232.84/h. The depletion number and sustainability index vary from 0.69 to 0.84 and 1.20 to 1.44, respectively.

Item Type:	Article
Uncontrolled Keywords:	Exergy, Exergo-environomic analysis, Sustainability index, GTIT, Carbon dioxide emissions
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	25 Oct 2018 11:31
Last Modified:	25 Oct 2018 11:31
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/12025

Actions (login required)

View Item