Related Papers
THERMODYNAMIC ANALYSIS OF AN INTEGRATED GASIFICATION COMBINED CYCLE POWER PLANT
mustafa zeki yilmazoglu
Integrated gasification combined cycle (IGCC) power plants have become more attractive after the emission regulations of the thermal power plants. IGCC power plants enable to control emissions which cause global warming. Low grade lignites, biomass and wastes can be utilized by this technology. This study deals with the thermodynamic analysis of an IGCC power plant. Energy and exergy analysis are carried out for a Texaco type gasifier, one stage, oxygen blown and slurry fed. Cold gas cleaning (fuel gas treatment) system is considered for the simulations, performed in THERMOFLEX software. A parametric study is also carried out to show the effects of the O2 purity, fuel supply temperature, gasifier temperature and H2O content of the slurry to the IGCC performance. Net power and net electric efficiency are calculated to be 389.669 MW and 43.53% respectively. Exergy efficiency of the simulated IGCC is found to be 40.36% and the highest exergy destruction is observed in gasifier and the combustion chamber of the gas turbine.
International Journal of Engineering Research and Technology (IJERT)
IJERT-Exergy Analysis Of Thermal Power Plant; A Review
2013 •
IJERT Journal
https://www.ijert.org/exergy-analysis-of-thermal-power-plant-a-review https://www.ijert.org/research/exergy-analysis-of-thermal-power-plant-a-review-IJERTV2IS70048.pdf Power generation industry plays a key role in the economic growth of the country. The energy supply to demand narrowing down day by day around the world, the growing demand of power has made the power plants of scientific interest, but most of the power plants are designed by the energy performance criteria based on first law of thermodynamics only. The real useful energy loss cannot be justified by the fist law of thermodynamics, because it does not differentiate between the quality and quantity of energy. The present study deals with the exergy analyses of thermal power plants stimulated by coal and provide a detailed review of different studies on thermal power plants over the years. This review will identify major sources of losses and exergy destruction in the power plant. It will provide ways and means to improve the system performance and reduce environment impact.
International Journal of Engineering Research and Technology (IJERT)
IJERT-Energy and Exergy Analysis of Coal Fired Cogeneration Power Plant
2014 •
IJERT Journal
https://www.ijert.org/energy-and-exergy-analysis-of-coal-fired-cogeneration-power-plant https://www.ijert.org/research/energy-and-exergy-analysis-of-coal-fired-cogeneration-power-plant-IJERTV3IS20737.pdf In this paper an energy and exergy analysis of cogeneration power plant is presented. Most of the power plants are designed by an energetic performance criteria based on first law of thermodynamics only it gives an amount of energy inlet and outlet but it does not specify the quantity of energy losses in an environment. Real use of energy can justified by second law of thermodynamics which gives quality and quantity of energy at inlet and outlet. In this study an energy and exergy analysis of different components of coal based power plant is carried out and found out that and energy and exergy efficiency of boiler is 84.38% and 58.50% respectively.
International Journal of …
Exergy-based Comparative Assessment of Zero CO2 Emission Coal Gasification Processes Feeding H2Fueled Power Plants
2010 •
enrico sciubba
Prospect of Coal Based IGCC to Meet the Clean Energy Challenge
2014 •
subir Hazra
The development of a country is nearly proportional to the average per person energy consumption rate, which is very low in our country. However, the rate of average energy consumption is increasing day by day throughout the world. With increasing the production of energy, the problem of environment pollution from the power generation sources and energy efficiency becomes more imperative. Coal is the major source of primary energy of the world, however, the energy efficiency of coal based power plant is low, and also it significantly polluted the environment. Therefore, to improve the energy efficiency and reduce the pollution from coal based power plant is an important issue to discuss. In this paper, the primary reserves of energy throughout the world are discussed. Integrated gasification combined cycle (IGCC) is a latest technology used to improve the performance of coal based power plant. The process of IGCC and the present condition of IGCC throughout the world is discussed. F...
Fuel and Energy Abstracts
Biomass integrated gasification combined cycle power generation with supplementary biomass firing: Energy and exergy based performance analysis
2011 •
Bireswar Paul
A thermodynamic analysis of a Biomass Integrated Gasification Combined Cycle (BIGCC) plant has been performed based on energy and exergy balances in a proposed configuration. Combustion of supplementary biomass fuel is considered using the oxygen available in the gas turbine (GT) exhaust. The effects of pressure and temperature ratios of the GT system and the amount of fuel burned in the supplementary firing chamber on the thermal and exergetic efficiencies of the plant have been investigated. The plant efficiencies increase with the increase in both pressure and temperature ratios; however, the latter has a stronger influence than the former. Supplementary firing of biomass increases the plant efficiencies of a BIGCC plant till an optimum level of degree of firing. The other technical issues related to supplementary firing, like ash fusion in the furnace and exhaust heat loss maintaining a minimum pinch point temperature difference are accounted and finally a set of optimum plant operating parameters have been identified. The performance of a 50 MWe plant has been analyzed with the optimum operating parameters to find out equipment rating and biomass feed rates. Exergetic efficiencies of different plant equipments are evaluated to localize the major thermodynamic irreversibilities in the plant.► A thermodynamic analysis of a Biomass Integrated Gasification Combined Cycle (BIGCC) plant has been performed based on energy and exergy balances across various plant components in a proposed configuration in order to optimize the operating parameters. ► The effect of supplementary biomass firing in the BIGCC plant has been analyzed in detail to find out the optimum degree of firing for the best plant performance. ► The equipment ratings and fuel feed rates are evaluated and the technical feasibility of the plant configuration has been analyzed. ► Exergetic efficiencies of different plant equipments are evaluated to localize the major thermodynamic irreversibilities in the plant.
Exergy Analysis of Coal-Fired Power Plants in Ultra Supercritical Technology versus Integrated Gasification Combined Cycle
2020 •
Dwi Mustafida
This study evaluates and compared the performance of coal-fired power plants in ultrasupercritical (USC) versus integrated gasification combined cycle (IGCC). System execution in terms of net control created, exergy examination was performed to coordinate the vitality loss dispersion of this system. Base on the exergy adjust condition. The IGCC system is modeled and simulated with post-combustion capture and both used sub-bituminous coal from the Indramayu PLTU. The result display that with the same amount of raw materials (20 ton/h coal) the IGCC generated great net power than USC. IGCC produced net power of 42 MW and USC of 22 MW. The highest exergy loss in the gasifier, H2S Removal and Carbon Capture for IGCC and in Boiler, Steam Turbine system, and condenser for USC. The total exergy efficiency for IGCC was 41.51% and 33.71% in USC.
Conceptual model and evaluation of generated power and emissions in an IGCC plant
健 中西
This work develops a design and operation support tool for an Integrated Gasification Combined Cycle (IGCC) power plant, which allows the efficiency and environmental issues of alternative process designs and feedstock to be assessed. The study is based on a conceptual model of an IGCC plant, validated with data from the ELCOGAS power plant in Spain. The layout of the model includes an Air Separation Unit (ASU), a Pressurized Entrained Flow (PRENFLO) gasifier, a series of purification gas units (venturi scrubber, sour water steam stripper, COS hydrolysis reactor, MDEA absorber columns and a sulphur recovery Claus plant), a Heat Recovery Steam Generator (HRSG) and a Combined Cycle (CC) system. It comprises steady state models. One of the purposes of this work is to analyze the feasibility of coal co-gasification using waste materials; specifically petco*ke and olive pomace (orujillo) are considered here. The model has been developed in Aspen Hysys. It uses electrolyte models that have been implemented in Aspen Plus which are connected to Aspen Hysys by means of Artificial Neural Networks (ANNs) models. Results of the model's, gas composition and generated power, are in agreement with the industrial data.
International Conference on Thermal Engineering ( ICTE 2014 ) Energy and exergy analysis of a coal based thermal power plant
2014 •
Farhana Alam
This paper addresses the energetic and exergetic efficiencies and losses in different components and the overall system of a 250 MW coal based thermal power plant. The plant is operated under Bangladesh Power Development Board (BPDB), which is located at Barapukuria, Bangladesh and consists of 2 units (2 x 125 MW). The analyses have been carried out by considering design data for different designed and loading conditions of the plant. The overall energy efficiencies of the plant are 35.48%, 56.77%, 70.96% and 75.67% and the overall exergy efficiencies were 44.25%, 33.31%, 30.78 % and 30.21% for 50%, 80%, 100% and 106% loading conditions respectively for the design data. However, the overall energy and exergy efficiencies of the power plant during operation are 39.2%, 46.6% and 27.9 %, 27.2% for 57% and 67% loading conditions respectively, which are lower than the design value. The distribution of the exergy losses in power plant components has been assessed to locate the process irr...
6th BSME International Conference on Thermal Engineering (ICTE 2014)
Energy and exergy analysis of a coal based thermal power plant
2014 •
AKM Nazrul Islam, Farhana Alam
This paper addresses the energetic and exergetic efficiencies and losses in different components and the overall system of a 250 MW coal based thermal power plant. The plant is operated under Bangladesh Power Development Board (BPDB), which is located at Barapukuria, Bangladesh and consists of 2 units (2 x 125 MW). The analyses have been carried out by considering design data for different designed and loading conditions of the plant. The overall energy efficiencies of the plant are 35.48%, 56.77%, 70.96% and 75.67% and the overall exergy efficiencies were 44.25%, 33.31%, 30.78 % and 30.21% for 50%, 80%, 100% and 106% loading conditions respectively for the design data. However, the overall energy and exergy efficiencies of the power plant during operation are 39.2%, 46.6% and 27.9 %, 27.2% for 57% and 67% loading conditions respectively, which are lower than the design value. The distribution of the exergy losses in power plant components has been assessed to locate the process irreversibility. The comparison between the energy losses and the exergy losses of the individual components of the plant shows that the maximum energy losses (~49.92%) occur in the condenser, whereas the maximum exergy losses (~68.27%) occur in the boiler. Exergy analysis can be particularly effective in identifying ways to optimize the performance of existing operations and designing the plant while energy balance gives heat transfer between the system and its surrounding.
