A novel mathematical approach for the optical efficiency optimization of solar tower power plant technology

2021 ◽  
Author(s):  
Fathia Eddhibi ◽  
Abdessalem Ben Haj Ali ◽  
Mahmoud Ben Amara ◽  
Moncef Balghouthi ◽  
Amen Allah Guizani
Keyword(s):  
Power Plant ◽  
Mathematical Approach ◽  
Optical Efficiency ◽  
Efficiency Optimization

Exergy Analysis and Exergoeconomic Optimization with Multiobjective Method of Unit 4 Kamojang Geothermal Power Plant

2016 ◽  
Vol 819 ◽  
pp. 523-529 ◽  
Author(s):  
Nasruddin ◽  
Septian Khairul Masdi ◽  
Arief Surachman
Keyword(s):  
Power Plant ◽  
Exergy Analysis ◽  
Exergy Efficiency ◽  
Economic Optimization ◽  
Efficiency Optimization ◽  
Geothermal Power Plant ◽  
System Cost ◽  
Wellhead Pressure ◽  
Geothermal Power ◽  
Valve Pressure

This study presents four analysis at unit 4 Kamojang geothermal power plant are exergy analysis at current condition, exergy efficiency optimization, economic optimization, and exergoeconomic optimization with wellhead valve pressure as a variable. Calculations are conducted by using the MATLAB. Thermodynamics characteristic of geothermal fluid assumed as water characteristic which get from REFPROP. Wellhead pressure operational condition 10 bar has exergy efficiency 31.91%. Exergy efficiency optimization has wellhead valve pressure 5.06 bar, exergy efficiency 47.3%, and system cost US$ 3,957,100. Economic optimization has well pressure 11 bar, exergy efficiency 22.13%, and system cost US$ 2,242,200. Exergoeconomic optimization has 15 optimum condition. Exergoeconomic optimization aims to analyze the optimum wellhead valve pressure for maximum exergy efficiency and minimum cost of power plant system.

Energy, Financial, and Environmental Investigation of a Direct Steam Production Power Plant Driven by Linear Fresnel Solar Reflectors

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Mokhtar Ghodbane ◽  
Evangelos Bellos ◽  
Zafar Said ◽  
Boussad Boumeddane ◽  
Abderrahmane Khechekhouche ◽  
...  
Keyword(s):  
Power Plant ◽  
Net Present Value ◽  
Solar Power ◽  
Solar Power Plant ◽  
Present Value ◽  
Optical Efficiency ◽  
Levelized Cost Of Electricity ◽  
Water Steam ◽  
Produce Water ◽  
The Mean

Abstract The objective of this paper is the investigation of the annual performance of a solar power plant with linear Fresnel reflectors in the El-Oued region at Algeria. The solar collectors produce water steam that feeds a turbine to produce electricity. The System Advisor Model (sam) tool is used for simulation. The mean net daily electricity production rate from 8:30 am to 5:30 pm is 48 MWe, and the respective annual production is 210,336 MWh/year. The mean daily optical efficiency of the solar field was close to 52%, while the mean thermal efficiency was about 39%. The net daily cycle efficiency is found to be 24%. The net capital cost of the examined system is $393 million, and the developer net present value is $47 million; the investor net present value is $15 million, the entire period of capital recovery is 11 years, and the levelized cost of electricity is 0.0382 $/kWh. The solar power plant leads to the yearly avoidance of 420,672 tons carbon dioxide emissions (operational cost savings of $6.1 million). Based on the obtained results, linear Fresnel reflectors can be used to achieve satisfying, energetic, financial, and environmental performance that can lead to sustainability.

Thermal Efficiency Optimization of a Modular High Temperature Gas-Cooled Reactor Plant by Extraction Steam Distribution

2020 ◽  
Author(s):  
Di Jiang ◽  
Zhe Dong
Keyword(s):  
High Temperature ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Thermal Efficiency ◽  
Nuclear Power ◽  
Normal Operation ◽  
Efficiency Optimization ◽  
Load Following ◽  
Fluid Network ◽  
High Temperature Gas

Abstract Modular high temperature gas-cooled reactor (MHTGR) is a small modular reactor (SMR) with inherent safety, which is suitable for load following to improve economic competitiveness. The heat regenerative system for MHTGR nuclear power plant, is crucial for the improvement of thermal efficiency. Traditionally, the enthalpy drop distribution method (EDM) is used to study the relationships between thermal efficiency and distribution of extraction steam. However, this strategy is mainly used for off-line design of steam turbine under rated conditions. For load following operation, it is hard to guarantee the extraction steam distribution of EDM due to the highly nonlinear “flowrate-pressure-temperature” coupling of the fluid network. Thus, in this paper, the thermal efficiency is derived analytically based on the steady state model of fluid network. Then the thermal efficiency optimization is cast into a nonlinear programming problem, in which physical constraints can be considered explicitly. The proposed method for extraction steam distribution is of significance for improving the thermal efficiency of normal operation of nuclear power plant.

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