Energy Efficiency Measurement in Coal-Fired Power Plant Using DEA and PCA

2014 ◽  
Vol 1070-1072 ◽  
pp. 1739-1742
Author(s):  
Xiao Liang Wang ◽  
Chao Yang Qu ◽  
Hai Yan Liu
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Power Plants ◽  
Efficiency Measurement ◽  
Production Parameters

For the efficiency measurement of coal-fired power plant has drawn attention widely, and then this article analyzed five power plants in China with a combination of PCA and DEA. Adjust of production parameters and strategies according to the method to improve the efficiency of power plants. This article proved that the method can make a breakthrough in evaluating performance of the power plants.

scholarly journals Using adsorption chillers for utilising waste heat from power plants

2019 ◽  
Vol 23 (Suppl. 4) ◽  
pp. 1143-1151 ◽  
Author(s):  
Karol Sztekler ◽  
Wojciech Kalawa ◽  
Sebastian Stefanski ◽  
Jaroslaw Krzywanski ◽  
Karolina Grabowska ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Efficiency ◽  
Power Plant ◽  
Power Plants ◽  
Waste Heat ◽  
Primary Energy ◽  
Simulation Software ◽  
Coefficient Of Performance ◽  
Low Grade ◽  
Adsorption Chiller

At present, energy efficiency is a very important issue and it is power generation facilities, among others, that have to confront this challenge. The simultaneous production of electricity, heat and cooling, the so-called trigeneration, allows for substantial savings in the chemical energy of fuels. More efficient use of the primary energy contained in fuels translates into tangible earnings for power plants while reductions in the amounts of fuel burned, and of non-renewable resources in particular, certainly have a favorable impact on the natural environment. The main aim of the paper was to investigate the contribution of the use of adsorption chillers to improve the energy efficiency of a conventional power plant through the utilization of combined heat and power waste heat, involving the use of adsorption chillers. An adsorption chiller is an item of industrial equipment that is driven by low grade heat and intended to produce chilled water and desalinated water. Nowadays, adsorption chillers exhibit a low coefficient of performance. This type of plant is designed to increase the efficiency of the primary energy use. This objective as well as the conservation of non-renewable energy resources is becoming an increasingly important aspect of the operation of power generation facilities. As part of their project, the authors have modelled the cycle of a conventional heat power plant integrated with an adsorption chiller-based plant. Multi-variant simulation calculations were performed using IPSEpro simulation software.

scholarly journals Improving Flexibility and Energy Efficiency of Post-Combustion CO2 Capture Plants Using Economic Model Predictive Control

Processes ◽  
2018 ◽  
Vol 6 (9) ◽  
pp. 135 ◽  
Author(s):  
Benjamin Decardi-Nelson ◽  
Su Liu ◽  
Jinfeng Liu
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Model Predictive Control ◽  
Predictive Control ◽  
Economic Performance ◽  
Economic Model ◽  
Power Plants ◽  
Gas Flow ◽  
Renewable Energy Sources ◽  
Economic Model Predictive Control

To reduce CO 2 emissions from power plants, electricity companies have diversified their generation sources. Fossil fuels, however, still remain an integral energy generation source as they are more reliable compared to the renewable energy sources. This diversification as well as changing electricity demand could hinder effective economical operation of an amine-based post-combustion CO 2 capture (PCC) plant attached to the power plant to reduce CO 2 emissions. This is as a result of large fluctuations in the flue gas flow rate and unavailability of steam from the power plant. To tackle this problem, efficient control algorithms are necessary. In this work, tracking and economic model predictive controllers are applied to a PCC plant and their economic performance is compared under different scenarios. The results show that economic model predictive control has a potential to improve the economic performance and energy efficiency of the amine-based PCC process up to 6% and 7%, respectively, over conventional model predictive control.

scholarly journals Analysis of the evaporative towers cooling system of a coal-fired power plant

2012 ◽  
Vol 16 (suppl. 2) ◽  
pp. 375-385 ◽  
Author(s):  
Mirjana Lakovic ◽  
Slobodan Lakovic ◽  
Milos Banjac
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Theoretical Analysis ◽  
Power Plants ◽  
Cooling Tower ◽  
Cooling System ◽  
Low Cost ◽  
Cooling Water ◽  
Energy Efficiency Improvement ◽  
Condensing Pressure

The paper presents a theoretical analysis of the cooling system of a 110 MW coal-fired power plant located in central Serbia, where eight evaporative towers cool down the plant. An updated research on the evaporative tower cooling system has been carried out to show the theoretical analysis of the tower heat and mass balance, taking into account the sensible and latent heat exchanged during the processes which occur inside these towers. Power plants which are using wet cooling towers for cooling condenser cooling water have higher design temperature of cooling water, thus the designed condensing pressure is higher compared to plants with a once-through cooling system. Daily and seasonal changes further deteriorate energy efficiency of these plants, so it can be concluded that these plants have up to 5% less efficiency compared to systems with once-through cooling. The whole analysis permitted to evaluate the optimal conditions, as far as the operation of the towers is concerned, and to suggest an improvement of the plant. Since plant energy efficiency improvement has become a quite common issue today, the evaluation of the cooling system operation was conducted under the hypothesis of an increase in the plant overall energy efficiency due to low cost improvement in cooling tower system.

scholarly journals COMPARATIVE INVESTIGATION OF FIXED AND TRACKING PV SOLAR POWER PLANTS ENERGY EFFICIENCY

2019 ◽  
Vol 10 (2) ◽  
Author(s):  
Dragoljub Mirjanić ◽  
Tomislav Pavlović ◽  
Ivana Radonjić ◽  
Darko Divnić
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Monitoring System ◽  
Power Plants ◽  
Solar Power ◽  
Comparative Investigation ◽  
Solar Power Plant ◽  
Basic Information ◽  
Solar Power Plants

The paper provides basic information on fixed (stationary), one-axis tracking and dual-axis tracking PV solar power plants. In this regard, a schematic overview of the PV solar power plant and basic information on its components (solar modules, inverters, monitoring system, etc.) are given. The following is a description of the fixed, one-tracking and dual-tracking PV solar power plant and their energy efficiency. Finally, measured results of power and temperature of fixed and dual-axis tracking solar modules of 50 W are presented.

scholarly journals Improving the energy efficiency of a solar power plant

2020 ◽  
pp. 132-143
Author(s):  
I. R. Vashchyshak ◽  
V. S Tsykh
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Power Plants ◽  
Solar Power ◽  
Solar Power Plant ◽  
Solar Panels ◽  
The South ◽  
Inclination Angles ◽  
Fixed Power ◽  
Solar Power Plants

The urgency of the work is due to the feasibility of increasing the energy efficiency of solar power plants through the use of solar energy concentrators. Ways to improve the energy efficiency of solar panels using a sys-tem of directional mirrors, flat Fresnel lenses, spherical concentrators and trackers have been investigated. It is established that the most optimal way to improve the energy efficiency of solar panels is to use inexpensive track-ers with a simple design. The analysis of known types of solar panels, which differ in materials from which their elements are made, and the coefficients of efficiency – dependence of energy produced by a photocell on the intensity of solar radiation per unit of its surface has been carried out, and the type of solar panels by the criterion “price-quality” has been selected. A tracker design has been developed to track the angle of inclination of solar panels to increase efficiency. The electricity generated by the proposed solar power plant was calculated using an online calculator. It is projected to reduce losses when generating electricity for a given power plant due to the use of a tracker compared to a fixed power system, with the same number of solar panels. In order to reduce the cost of the tracker, it is suggested to orientate it to the south at once, and to change the inclination angles twice a year (in early April and late August). The energy efficiency of the power plant is calculated in two stages. At the first stage the amount of electricity from solar panels per year when adjusting only the angle of inclination of the panels to the south is calculated. At the second stage energy efficiency of the power plant is calculated taking into account the increase of energy efficiency of the solar power plant when using the tracker system. The calculated electricity generation of the proposed solar power plant with tracker confirmed the efficiency and feasibility of using the designed tracker system. The application of the designed tracker system allows to increase the energy efficiency of solar panels by an average of 25%.

scholarly journals Investigation of the energy efficiency of PV solar power plant installed at the Faculty of Sciences and Mathematics, University of Nis

2015 ◽  
Vol 13 (3) ◽  
pp. 141-152 ◽  
Author(s):  
Dragana Milosavljevic ◽  
Tomislav Pavlovic
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Ambient Temperature ◽  
Power Plants ◽  
Solar Power ◽  
Solar Power Plant ◽  
Climate Conditions ◽  
Calculated Energy ◽  
Solar Power Plants ◽  
And Mathematics

The paper provides basic information on the 2 kWp PV solar power plant with monocrystalline silicon solar modules installed on the roof of the Faculty of Sciences and Mathematics (FSM), University of Nis, and the equipment for the investigation of its energy efficiency depending on the real climate conditions. Furthermore, results of the simulation and experimental determination of the energy efficiency of the PV solar power plant at FSM in Nis, in the period from July 1, 2013 to January 1, 2014, are given. It was found that in this time period the average values of the experimental and simulation calculated energy efficiencies of the PV solar power plant were 9.52% and 8.44%, respectively. The increase in the ambient temperature caused a decrease in the PV solar power plant energy efficiency; with an increase in ambient temperature by 1 ?C, the experimental energy efficiency decreased by 0.22%, and the simulation calculated energy efficiency decreased by 0.07%. The obtained data could be used for the planning and application of PV solar power plants in places with a similar climate.

South-east Asian electricity gaps need finance remedy

2016 ◽  
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
East Asia ◽  
Power Plants ◽  
East Asian ◽  
Land Rights ◽  
South East Asia ◽  
Medium Term ◽  
Content Type ◽  
Government Power

Subject Electrification in South-east Asia. Significance Indonesia's president has ordered a review of a government power-plant-building scheme, the energy minister said on May 13, amid concerns that construction and land-rights-related delays will cause the 2019 implementation schedule to be missed. Indonesia's example highlights the broader challenges facing South-east Asia in meeting medium-term electrification goals. Impacts Uneven regional electrification will hinder some ASEAN states' industrialisation; raising productivity will be hard. Power plants and factories will need energy efficiency upgrades. Regional electrification could increase greenhouse gases, and see some social backlash.

scholarly journals Impact of the cold end operating conditions on energy efficiency of the steam power plants

2010 ◽  
Vol 14 (suppl.) ◽  
pp. 53-66 ◽  
Author(s):  
Mirjana Lakovic ◽  
Mladen Stojiljkovic ◽  
Slobodan Lakovic ◽  
Velimir Stefanovic ◽  
Dejan Mitrovic
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Water Temperature ◽  
Flow Rate ◽  
Power Plants ◽  
Cooling Water ◽  
Operating Conditions ◽  
Steam Boiler ◽  
Steam Power ◽  
Cooling Water Temperature

The conventional steam power plant working under the Rankine Cycle and the steam condenser as a heat sink and the steam boiler as a heat source have the same importance for the power plant operating process. Energy efficiency of the coal fired power plant strongly depends on its turbine-condenser system operation mode. For the given thermal power plant configuration, cooling water temperature or/and flow rate change generate alterations in the condenser pressure. Those changes have great influence on the energy efficiency of the plant. This paper focuses on the influence of the cooling water temperature and flow rate on the condenser performance, and thus on the specific heat rate of the coal fired plant and its energy efficiency. Reference plant is working under turbine-follow mode with an open cycle cooling system. Analysis is done using thermodynamic theory, in order to define heat load dependence on the cooling water temperature and flow rate. Having these correlations, for given cooling water temperature it is possible to determine optimal flow rate of the cooling water in order to achieve an optimal condensing pressure, and thus, optimal energy efficiency of the plant. Obtained results could be used as useful guidelines in improving existing power plants performances and also in design of the new power plants. <br><br><font color="red"><b> This article has been corrected. Link to the correction <u><a href="http://dx.doi.org/10.2298/TSCI151102198E">10.2298/TSCI151102198E</a><u></b></font>

scholarly journals Management Index Systems and Energy Efficiency Diagnosis Model for Power Plant: Cases in China

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Jing-Min Wang ◽  
XiaoJie Ge ◽  
LiLi Zhang ◽  
Hang Zhang
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Cloud Model ◽  
Thermal Power ◽  
Diagnostic Model ◽  
Data Envelopment ◽  
Qualitative And Quantitative ◽  
Diagnosis Model

In recent years, the energy efficiency of thermal power plant largely contributes to that of the industry. A thorough understanding of influencing factors, as well as the establishment of scientific and comprehensive diagnosis model, plays a key role in the operational efficiency and competitiveness for the thermal power plant. Referring to domestic and abroad researches towards energy efficiency management, based on Cloud model and data envelopment analysis (DEA) model, a qualitative and quantitative index system and a comprehensive diagnostic model (CDM) are construed. To testify rationality and usability of CDM, case studies of large-scaled Chinese thermal power plants have been conducted. In this case, CDM excavates such qualitative factors as technology, management, and so forth. The results shows that, compared with conventional model, which only considered production running parameters, the CDM bears better adaption to reality. It can provide entities with efficient instruments for energy efficiency diagnosis.

scholarly journals CONCEPTUAL MODEL FOR ENERGY-EFFICIENCY MANAGEMENT IN STEAM-POWER PLANTS

2017 ◽  
Vol 22 (2) ◽  
Author(s):  
OGNYAN DINOLOV
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Electric Power ◽  
Conceptual Model ◽  
Power Plants ◽  
Power Demand ◽  
Steam Power ◽  
Steam Power Plants ◽  
Efficiency Measures ◽  
Qualitative Characteristics

An aggregate algorithmized conceptual model for controlling the energy efficiency in the steam-power plants, with taking into account the deviations in the qualitative characteristics of the used fuel, is proposed and justified. The model is applied for a coal-fired power plant, at two of its stages, through simulations in MATLAB Simulink and analyzing some of the data with the program Statistica. The development creates preconditions to algorithmize (to model) comprehensive energy efficiency measures in the operating plants, and to design and build new systems for monitoring and controlling the auxiliary electric power demand.

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