4E analysis and evaluation of a steam power plant full repowering in various operations

ABSTRACT

In this paper, full repowering of a 320 MW steam power plant was investigated in Bandar Abbas. Due to unavailability of natural gas in the winter, LNG, Diesel, and Heavy fuel were examined as alternative fuels. The energetic, exergetic, exergoeconomic, and exergoenvironmental (4E) analyses were performed for old and repowered cases. The exergoenvironmental analyses were done based on the Life Cycle Assessment in SimaPro software. The net power, fuel consumption, costs, and environmental impacts were calculated by considering different fuels for each season. To better demonstrate the plant performance, the exergy destruction level (EDL) and the exergy cost destruction level (ECDL) were defined and applied as EDL/ECDL. To perform this analysis, a computer program was developed that could predict the base cycle and repowered cycle behaviors for different operating conditions with relative errors of less than 1.85%. Results demonstrated a 16% increase in the overall cycle efficiency, a 12% decrease in the methane consumption, and a 3% elevation in the net power using the LNG fuel.

KEYWORDS:

• Repowering
• exergy
• exergoeconomic
• exergoenvironmental
• LNG energy recovery
• steam Power Plant

Nomenclature

Table

Data Availability

Some other related data, models, and sample codes generated during this study are available from the corresponding author upon request.

Additional information

Notes on contributors

Saeed Kabiri

Saeed Kabiri is a MSc student of of Energy Systems Engineering from the  K.N. Toosi University of Technology. He is also a member of the Process & Energy Integration Research Lab of K. N. Toosi University of Technology. He is also member of  Energy, Environment, and Biologic Research lab (EEBRlab) at the University of Qom.

Mohammad Hasan Khoshgoftar Manesh

Mohammad Hasan Khoshgoftar Manesh is an assistant professor at the University of Qom, Faculty of Technology& Engineering, Department of Mechanical Engineering, Division of Thermal Sciences & Energy Systems. He is the director of CER (Center of Environmental Research) at the University of Qom. He is also head of Energy, Environment and Biologic Research lab (EEBRlab). His research interests include applied thermodynamics, optimization of energy systems, pinch technology, renewable energy, optimal design and advanced analysis of cogeneration and polygeneration systems.

Majid Amidpour

Majid Amidpour is Professor of Mechanical Engineering at K.N. Toosi University of Technology, Iran, Director of the Iranian Fuel Cell Society and Visiting Professor, Simon Fraser University (Canada) Politecnico di Milano (Italy). Amidpour is interested in developing fossil and renewable integration systems using cogeneration approaches. He is also Member of Energy center of excellency, Mechanical Engineering, University of Tehran. He is also director of Energy & Environment Research Center at Niroo Research Institute (NRI).