Energy and Exergy-Based Efficiency, Sustainability and Economic Assessment towards Improved Energy Management of a Thermal Power Plant: A Case Study

Md Hasan Maruf, Sameya Afrin July, Mamun Rabbani, Shafrida Sahrani, Molla Shahadat Hossain Lipu (), Mahidur R. Sarker (), Ratil H. Ashique, Md. Shahrial Kabir and A. S. M. Shihavuddin
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Md Hasan Maruf: Department of Electrical and Electronic Engineering, Green University of Bangladesh, Dhaka 1207, Bangladesh
Sameya Afrin July: Department of Electrical and Electronic Engineering, Green University of Bangladesh, Dhaka 1207, Bangladesh
Mamun Rabbani: Department of Biomedical Physics and Technology, University of Dhaka, Dhaka 1000, Bangladesh
Shafrida Sahrani: Institute of IR 4.0, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
Molla Shahadat Hossain Lipu: Department of Electrical and Electronic Engineering, Green University of Bangladesh, Dhaka 1207, Bangladesh
Mahidur R. Sarker: Institute of IR 4.0, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
Ratil H. Ashique: Department of Electrical and Electronic Engineering, Green University of Bangladesh, Dhaka 1207, Bangladesh
Md. Shahrial Kabir: Department of Electrical and Electronic Engineering, Green University of Bangladesh, Dhaka 1207, Bangladesh
A. S. M. Shihavuddin: Department of Electrical and Electronic Engineering, Green University of Bangladesh, Dhaka 1207, Bangladesh

Sustainability, 2023, vol. 15, issue 6, 1-16

Abstract: This paper explores the energy management of a natural gas-based thermal power plant, with a focus on improving its efficiency, sustainability, and economic feasibility. The study uses the Ashuganj Power Station Company Limited (APSCL) in Bangladesh as a case study. To evaluate the efficiency of the APSCL, both energy and exergy perspectives are considered, and sustainability is assessed through exergetic parameters. The plant’s economic feasibility is analyzed based on its fuel costs and operational losses. The results of the study indicate that the energy and exergy efficiencies of the APSCL vary from 32.97% to 33.21% and from 32.63% to 32.87%, respectively, for steam turbines and from 39.77% to 56.98% and from 39.36% to 56.40%, respectively, for combined cycle power plants (CCPP) during 2016–2021. The slightly lower efficiency in exergy calculations accounts for the system loss incurred over time, which is often omitted in efficiency calculations using energy parameters. To measure the sustainability of the APSCL, eight key indicators are used: the depletion number, exergy sustainable index, cumulative exergy loss, relative irreversibility, lack of production, the wasted exergy ratio, environmental effect factor, and improvement potential. The results indicate that APSCL still has opportunities for improvement in terms of sustainability, with 50% of the fuel being depleted in the plant, contributing to a sustainable index of 2.00 and cumulative exergy loss varying between 48.59 and 21.17. Regarding financial costs and losses, APSCL has experienced an increasing trend in the price of electricity generated. However, by implementing intelligent maintenance practices and upgrading equipment in a timely manner, it is possible to minimize costs and increase exergy output, reducing the per-unit fuel requirement for electricity production and the global carbon footprint significantly.

Keywords: exergy; sustainability; efficiency; economic performance; Bangladesh (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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