Exergoeconomic analysis and optimization of single and double flash cycles for Sabalan geothermal power plant

Saeid Mohammadzadeh Bina, Saeid Jalilinasrabady, Hikari Fujii

研究成果: ジャーナルへの寄稿記事

5 引用 (Scopus)

抄録

In this study single and double flash systems were designed to utilize the Sabalan geothermal fluid as a heat source. An Exergoeconomic model was applied on plant’ equipment in order to calculate the thermodynamic and economic performances of the cycles. Parametric analysis was done to examine the effect of important key parameters including flash pressures and steam quality at turbine outlet on plant performance. Optimization process for maximum net power output was carried out on the plant using direct searching method in EES (Engineering Equation Solver). This process aimed to find the optimum flashing pressures corresponding to the maximum potential power output as an objective function. Additionally, the major exergy destruction locations were shown graphically and side by side for both systems to observe the effect of secondary flash process on exergy destruction at each component. Afterward, an environmental study was done in order to calculate the amount of fossil fuel saving and pollutants emission reduction compared to conventional fossil fuel power plants. The result showed that in double flash energy and exergy efficiency were increased from 16.26% and 40.06% to 17.73% and 50.89%, respectively. Moreover, double flash resulted in higher net power output compared to that of single flash (28,838 kW vs. 36,055 kW) while both cycles were using the same geofluid. Optimization results revealed that thermodynamically optimum cycle could not result the best and lower energy production cost and vice versa. Therefore, the single flash generates electricity within lower price compared to double flash system. Moreover, double flash considerably reduces the required fossil fuel and various pollutants emission more than single flash if they were replaced by fossil fuel power plants with same amount of production.

元の言語英語
ページ(範囲)74-82
ページ数9
ジャーナルGeothermics
72
DOI
出版物ステータス出版済み - 3 1 2018

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Geothermal power plants
geothermal power
Exergy
Fossil fuel power plants
exergy
fossil fuel
power plant
Fossil fuels
Turbines
Steam
production cost
Electricity
heat source
Thermodynamics
turbine
electricity
Economics
Fluids
thermodynamics
engineering

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Geotechnical Engineering and Engineering Geology
  • Geology

これを引用

Exergoeconomic analysis and optimization of single and double flash cycles for Sabalan geothermal power plant. / Mohammadzadeh Bina, Saeid; Jalilinasrabady, Saeid; Fujii, Hikari.

:: Geothermics, 巻 72, 01.03.2018, p. 74-82.

研究成果: ジャーナルへの寄稿記事

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abstract = "In this study single and double flash systems were designed to utilize the Sabalan geothermal fluid as a heat source. An Exergoeconomic model was applied on plant’ equipment in order to calculate the thermodynamic and economic performances of the cycles. Parametric analysis was done to examine the effect of important key parameters including flash pressures and steam quality at turbine outlet on plant performance. Optimization process for maximum net power output was carried out on the plant using direct searching method in EES (Engineering Equation Solver). This process aimed to find the optimum flashing pressures corresponding to the maximum potential power output as an objective function. Additionally, the major exergy destruction locations were shown graphically and side by side for both systems to observe the effect of secondary flash process on exergy destruction at each component. Afterward, an environmental study was done in order to calculate the amount of fossil fuel saving and pollutants emission reduction compared to conventional fossil fuel power plants. The result showed that in double flash energy and exergy efficiency were increased from 16.26{\%} and 40.06{\%} to 17.73{\%} and 50.89{\%}, respectively. Moreover, double flash resulted in higher net power output compared to that of single flash (28,838 kW vs. 36,055 kW) while both cycles were using the same geofluid. Optimization results revealed that thermodynamically optimum cycle could not result the best and lower energy production cost and vice versa. Therefore, the single flash generates electricity within lower price compared to double flash system. Moreover, double flash considerably reduces the required fossil fuel and various pollutants emission more than single flash if they were replaced by fossil fuel power plants with same amount of production.",
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