scholarly journals Optimization of Dispatching Electricity Market with Consideration of a Solar-Assisted Coal-Fired Power Generation System

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1284
Author(s):  
Rongrong Zhai ◽  
Lingjie Feng ◽  
Hai Yu ◽  
Chao Li ◽  
Yongping Yang
Keyword(s):  
Power Generation ◽  
Electricity Market ◽  
Nox Emissions ◽  
Generation System ◽  
Coal Consumption ◽  
Power Generators ◽  
Multi Objective ◽  
Purchase Cost ◽  
Power Generation System ◽  
The Cost

This study investigates the multi-objective optimization of load dispatch of a solar-assisted coal-fired power generation system. The improved environmental/economic load dispatch model considers coal consumption, NOx emissions, and power purchase cost. The singular weighted method is utilized to solve this multi-objective and multi-constraint optimization problem. A power system that includes five power generators, one of which is retrofitted to a solar-assisted coal-fired unit, is also analyzed. It can be concluded that the loads of solar-assisted coal-fired units are higher than the original coal-fired unit, and with the increase of solar radiation, the gap between the loads of two units also increases. In addition, after retrofitting, the coal consumption, the NOx emission, and power costs of units reduce by about 2.05%, 0.45%, and 0.14%, respectively. From the study on the on-grid power tariff, where the tariff drops from 16.29 cents/kWh to 3.26 cents/kWh, NOx emissions drop from 12.31 t to 11.28 t per day, a reduction of about 8.38%. The cost of purchasing electricity decreases from $ 2,982,161.8 to $ 2,020,505.0 per day, a decrease of 32.25%. Therefore, when both coal-fired units and solar-assisted coal-fired units exist in a region, the use of solar-assisted coal-fired power generation units should be prioritized.

scholarly journals Multi-objective optimization of solar thermal photovoltaic hybrid power generation system based on NSGA-II algorithm

2021 ◽  
Vol 336 ◽  
pp. 02022
Author(s):  
Liang Meng ◽  
Wen Zhou ◽  
Yang Li ◽  
Zhibin Liu ◽  
Yajing Liu
Keyword(s):  
Power Generation ◽  
Optimization Problems ◽  
Optimal Solution ◽  
Solar Thermal ◽  
Multi Objective Optimization ◽  
Generation System ◽  
Nsga Ii ◽  
Multi Objective ◽  
Hybrid Power ◽  
Power Generation System

In this paper, NSGA-Ⅱ is used to realize the dual-objective optimization and three-objective optimization of the solar-thermal photovoltaic hybrid power generation system; Compared with the optimal solution set of three-objective optimization, optimization based on technical and economic evaluation indicators belongs to the category of multi-objective optimization. It can be considered that NSGA-Ⅱ is very suitable for multi-objective optimization of solar-thermal photovoltaic hybrid power generation system and other similar multi-objective optimization problems.

scholarly journals Sensitivity Analysis and Optimization of Operating Parameters of an Oxyfuel Combustion Power Generation System Based on Single-Factor and Orthogonal Design Methods

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 998
Author(s):  
Zhiyu Zhang ◽  
Rongrong Zhai ◽  
Xinwei Wang ◽  
Yongping Yang
Keyword(s):  
Power Generation ◽  
Flue Gas ◽  
Consumption Rate ◽  
Orthogonal Design ◽  
Excess Oxygen ◽  
Operating Parameters ◽  
Generation System ◽  
Coal Consumption ◽  
Oxygen Coefficient ◽  
Power Generation System

The main purpose of this paper is to quantitatively analyze the sensitivity of operating parameters of the system to the thermodynamic performance of an oxyfuel combustion (OC) power generation system. Therefore, the thermodynamic model of a 600 MW subcritical OC power generation system with semi-dry flue gas recirculation was established. Two energy consumption indexes of the system were selected, process simulation was adopted, and orthogonal design, range analysis, and variance analysis were used for the first time on the basis of single-factor analysis to conduct a comprehensive sensitivity analysis and optimization research on the changes of four operating parameters. The results show that with increasing oxygen purity, the net standard coal consumption rate first decreases and then increases. With decreasing oxygen concentration, the recirculation rate of dry flue gas in boiler flue gas ( χ 1 ) and an increasing excess oxygen coefficient, the net standard coal consumption rate increases. The net electrical efficiency was just the opposite. The sensitivity order of two factors for four indexes is obtained: the excess oxygen coefficient was the main factor that affects the net standard coal consumption rate and the net electrical efficiency. The influence of oxygen concentration and oxygen purity was lower than that of excess oxygen coefficient, and χ 1 has almost no effect.

Multi-Objective Optimal Mechanical Power for Turbine of River Current Power Generation Using Fuzzy Dominant Directed-Graph Method

2013 ◽  
Vol 284-287 ◽  
pp. 839-843
Author(s):  
Jian Long Kuo ◽  
Kai Lun Chao
Keyword(s):  
Power Generation ◽  
Taguchi Method ◽  
Output Power ◽  
Directed Graph ◽  
Optimal Solution ◽  
Generation System ◽  
Multi Objective ◽  
Optimal Output ◽  
Power Generation System ◽  
River Current

Abstract. The fuzzy dominant directed graph (fuzzy DDG) method is proposed in this paper to solve the multi-objective optimal mechanical turbine power of river current (RC) power generation system. Recently, there is great potential for the RC power generation system in renewable energy. The experimental Taguchi method is used to find the optimal solution for the power generation system. The optimization problem for the AC generator in RC power generation system is studied. The optimal output power with respect to three selected control factors is studied. By using Taguchi method, five cases are discussed. The testing case is the optimal output power problem. It is convinced that this method is applicable and easy to find the optimal solution quickly.

Synergetic Utilization of Coal and Industrial Waste Heat in Power Generation System

2013 ◽  
Vol 724-725 ◽  
pp. 990-998
Author(s):  
Zhen Chen ◽  
Wei Dou Ni
Keyword(s):  
Power Generation ◽  
Industrial Waste ◽  
Waste Heat ◽  
Generation System ◽  
Coal Consumption ◽  
Power Generation System ◽  
Industrial Waste Heat ◽  
Synergetic System ◽  
Power Generation Systems ◽  
Heating Mode

Coal and industrial waste heat synergetic utilization power generation system (the synergetic system) is proposed according to the energy cascade utilization principle. The industrial waste heat is used for feedwater heating of coal-fired power generation system to substitute steam extraction from steam turbine. The thermal performance of stand-alone waste heat power generation, stand-alone coal-fired power generation, and synergetic systems were studied, to compare the power generation capability of each system using heat balance method. The results show that the power generation capability of synergetic power generation system is larger than that of the two stand-alone systems. The equivalent and same grade waste heat synergized with higher-parameter, larger-capacity coal-fired power generation systems can generate more electricity than with the low-parameter ones; the high-parameter waste heat synergized with the higher-parameter and larger-capacity power generation systems can reach larger power generation capability. The multi-energy synergetic heating mode can greatly improve the comprehensive energy efficiency and reduce the coal consumption compared with the stand-alone energy heating mode.

Exergoeconomic Evaluation of a Solid-Oxide Fuel-Cell-Based Combined Heat and Power Generation System

2013 ◽  
Author(s):  
Young Duk Lee ◽  
Kook Young Ahn ◽  
T. Morosuk ◽  
G. Tsatsaronis
Keyword(s):  
Power Generation ◽  
Generation System ◽  
Real Cost ◽  
System A ◽  
Energy And Exergy ◽  
Power Generation System ◽  
Exergetic Analysis ◽  
Catalytic Combustor ◽  
Exergoeconomic Analysis ◽  
The Cost

An exergoeconomic evaluation has been conducted for a 100kW-class SOFC power generation system, in order to evaluate the cost effectiveness of the system. The exergoeconomic analysis is an appropriate combination of an exergy analysis and an economic analysis. Through an exergoeconomic analysis, we obtain the real cost associated with each stream and component in a system. We also can calculate the portion of the cost that is associated with the exergy destruction within each component. The analyzed system, a 100kW SOFC power generation system, consists of SOFC stack, reformer, catalytic combustor, heat exchangers, pumps, blowers, inverter, and HRSG for heat recovery. As a first step, mass, energy, and exergy balances were formulated. Then a conventional exergetic analysis (based on the concept of exergy of fuel/exergy of product) was performed. Next, a levelized cost for each component was calculated based on the purchased equipment costs using the Total Revenue Requirement (TRR) method with appropriate economic assumptions. Finally, the cost structure of the SOFC was figured out through an exergoeconomic evaluation. Finally suggestions have been made for reducing the cost associated with the product of the system.

scholarly journals Desain Sistem Pembangkit Listrik Tenaga Hybrid Diesel Generator-PV Menggunakan Software HOMER (Studi Kasus: KM Barcelona 1 di Pelabuhan Manado)

Jurnal MIPA ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 63
Author(s):  
Olive Ang Jaya ◽  
Hesky Stevy Kolibu ◽  
Verna Albert Suoth
Keyword(s):  
Power Generation ◽  
Electrical Load ◽  
Solar Panels ◽  
Diesel Generator ◽  
Generation System ◽  
Hybrid Power ◽  
Cost Of Energy ◽  
Power Generation System ◽  
The Cost ◽  
Simulated Scenario

Telah dilakukan penelitian untuk merancang sistem pembangkit listrik hybrid menggunakan software HOMER. Data beban listrik yang digunakan pada penelitian ini diambil dari kapal motor Barcelona 1 dengan rute perjalanan Manado-Tahuna dan data radiasi matahari diambil dari website NASA yang diakses melalui software HOMER. Data-data itu dimasukkan pada software HOMER untuk disimulasikan. Skenario 1 dibuat sesuai dengan kondisi sebenarnya di kapal dan skenario 2 merupakan desain sistem pembangkit listrik hybrid yang menggunakan photovoltaic. Berdasarkan simulasi yang telah dilakukan, desain pembangkit listrik pada skenario 2 lebih optimal  dengan nilai NPC (Net Present Cost) yaitu US$833.174 dan nilai Cost of Energy (COE) yaitu US$0,406. Skenario tersebut terdiri dari generator berkapasitas 10 kW dan panel surya 58,6 kWResearch has been conducted to design a hybrid power generation system using HOMER software. The electrical load data used in this study was taken from the Barcelona 1 motorship with the Manado-Tahuna travel route and solar radiation data taken from the NASA website accessed via the HOMER software. The data was entered into the HOMER software to be simulated. Scenario 1 is made according to the actual conditions on the ship and scenario 2 is a design of a hybrid power generation system that uses photovoltaic. Based on the simulation that has been done, the design of the power plant in scenario 2 is more optimal with the value of NPC (Net Present Cost) which is US$833,174 and the Cost of Energy (COE) value is US$0.406. The scenario consists of generators with a capacity of 10 kW and solar panels 58.6 kW

scholarly journals Molten Carbonate Fuel Cell Power Generation Technology and its Challenges

2020 ◽  
Author(s):  
Hao Li ◽  
Ruiyun Zhang ◽  
Chengzhuang Lu ◽  
Jian Cheng ◽  
Shisen Xu ◽  
...  
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Generation System ◽  
Power Generation Technology ◽  
Power Generation System ◽  
The Cost ◽  
Carbonate Fuel Cell ◽  
Generation Technology

Abstract As a clean and efficient power generation device, molten carbonate fuel cell(MCFC)can directly convert chemical energy into electrical energy at the operating temperature of 650 degrees, avoiding the heat loss caused by the Carnot cycle, and effectively reducing the emission of CO2 and other pollutants. This paper introduces the background, basic principle, system design and current situation of fused carbonate fuel cell at home and abroad, and explains the technical problems that molten carbonate power generation technology is facing. At the same time, the cost of the molten carbonate power generation system is analyzed, and the present cost and the cost after industrialization are compared and evaluated to provide a reference for the economy of the molten carbonate fuel cell power generation system.

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