Advanced Energy, Exergy, and Environmental (3E) Analyses and Optimization of a Coal-Fired 400 MW Thermal Power Plant

2020 ◽  
Vol 143 (8) ◽  
Author(s):  
Siamak Hoseinzadeh ◽  
P. Stephan Heyns
Keyword(s):  
Energy Consumption ◽  
Power Plant ◽  
Environmental Analysis ◽  
Thermal Power Plant ◽  
Co2 Emission ◽  
Environmental Temperature ◽  
Thermal Power ◽  
Energy Losses ◽  
Exergy Destruction ◽  
Exergetic Efficiency

Abstract In this article, energy, exergy, and environmental (3E) analysis of a 400 MW thermal power plant is investigated. First, the components of the power plant are examined in terms of energy consumption, and subsequently the energy losses, exergy destruction, and exergetic efficiency are obtained. It is shown that the highest energy losses are in the closed feedwater heaters Nos. 1 and 5 and the boiler with amounts of 7.6 × 10 J/s and 6.5 × 107 J/s, respectively. The highest exergy destruction occurs in the boiler and amounts to 4.13 × 108 J/s. The highest exergetic efficiency is 0.98 and is associated with the closed feedwater heaters Nos. 4 and 8. It is observed that the exergetic efficiency and exergy destruction in the boiler are the primarily affected by changes in the environmental temperature. Furthermore, by increasing the main pressure in the turbine, the load on the power plant is increased, and increasing the condenser pressure reduces the load on the power plant. In an environmental analysis, the production of pollutants such as SO2 production and CO2 emission has been investigated.

scholarly journals Application of exergoeconomic analysis for power plants

2018 ◽  
Vol 22 (6 Part A) ◽  
pp. 2653-2666
Author(s):  
Fatih Unal ◽  
Derya Ozkan
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Energy Resources ◽  
Exergy Destruction ◽  
Energy And Exergy ◽  
Exergoeconomic Analysis ◽  
Effective Use ◽  
Exergy Losses

Currently, energy resources are rapidly consumed. Therefore, scientists and engi?neers study the effective use of energy. In the present study, a thermodynamic and exergoeconomic analysis was performed in a thermal power plant in Turkey. The study involved determining the thermodynamic properties of 27 node points in a thermal power plant unit, and this was followed by calculating energy and exergy values of every node. Mean exergy costs were calculated by establishing energy and exergy balances of the equipment with respect to the calculated results. Subsequently, lost and damaged energies and exergies were calculated, and exergoeconomic factors were determined. The equipments were compared with each other on a graph based on the obtained results. The maximum rate of exergy loss and cost of exergy destruction corresponded to 79.5% and 886,66 $/h, respectively. The maximum exergy losses in a thermal power plant occurred in the boiler, turbine groups, condenser, heating group, pumps, and auxiliary groups. The highest and second highest law efficiencies of the studied thermal power plant corresponded to 32.3% and 28.5%, respectively. The study also involved presenting suggestions for improvement. Additionally, exergoeconomic analyses were conducted while considering the power plants? investment and equipment maintenance costs. It is expected that the calculation method and the obtained results can be applied to other thermal power plants.

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