Exergoeconomic and Optimization Analyses of Cogeneration Steam Power Plants based on the Thermoeconomic Approach

Malik F. Elmzughi*, Elhadi I. Dekam**, Elham M. Radwan***, Mawadda A. Bahoor****
*-**** Department of Mechanical and Industrial Engineering, Faculty of Engineering, University of Tripoli, Tripoli, Libya.
Periodicity:November - January'2021
DOI : https://doi.org/10.26634/jfet.16.2.17706

Abstract

This paper concerns the thermoeconomic analyses of a cogeneration steam power plant cycle with a total capacity of 350 MW. The exergy destruction and improvement potential of each component is calculated. Moreover, exergoeconomic factors, total cost, and exergy related costs were calculated to determine the influence of each component and to find the best way of decreasing generation costs. The methodology is based on the Theory of Exegetic cost. Thermodynamic properties of the inlet and outlet points of each component in the steam plant have been specified via the Thermax program, and economic analyses by employing both Excel and Matlab software packages. Under the considered status, the analysis shows that the maximum amount of exergy destruction and potential improvement occurs in the boiler, with 75% and 81%, respectively, and the exergetic efficiency has been 66.21% for the whole power plant cycle. The exergoeconomic factors and the total costs are calculated individually and for the whole plant cycle. The unit cost of steam, work, and cooling water for the plant are found. The unit cost of steam, work, and cooling water for the plant, in which they are found to be 0.030, 0.014, and 0.45$/kWh, respectively. Referring to the comparison with the simple power cycle under the same conditions, the steam unit cost remains mostly the same for both power cycles, while the work unit is widely different.

Keywords

Energy, Exergy, Exergy Destruction, Energetic Efficiency, Exergoeconomic Factor, Total Cost.

How to Cite this Article?

Elmzughi, M. F., Dekam, E. I., Radwan, E. M., and Bahoor, M. A. (2021). Exergoeconomic and Optimization Analyses of Cogeneration Steam Power Plants based on the Thermoeconomic Approach. i-manager's Journal on Future Engineering and Technology, 16(2), 22-31. https://doi.org/10.26634/jfet.16.2.17706

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