gas cogeneration Articles
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In view of sustainable future energetic–exergetic and economic analysis of a natural gas cogeneration plant
Thermodynamics plays an important role in performing energy and exergy analyses of industrial processes. The first law is widely used in engineering practice, and is the basis of the heat–balance method of analysis that is commonly used in energy systems performance analysis. However, the second law involves the reversibility or irreversibility of processes, and is a very important aspect ...
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Sensitivity analysis of component efficiencies on performance of a gas turbine cogeneration system
The performance of a 1000 kW gas-turbine cogeneration system was evaluated in terms of performance measures, such as net power, exergy efficiency of the system, and the unit costs of electricity and steam. The efficiencies of some components that have a significant affect on the performance were taken as physical variables. Sensitivity was evaluated by introducing parameters, defined as the ratio ...
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An appraisal method of exergy cost minimisation for co-generation systems
This study introduces an exergy cost-minimisation appraisal method for a simple gas turbine co-generation system. Optimisation of a gas turbine co-generation system of the electric output class of 17 MW is examined for a variety of turbine inlet temperatures of 950–1,300°C. An optimum value of the turbine inlet temperature exists for exergy cost minimisation and is estimated to be 1,200°C since ...
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Thermodynamic evaluation of gas turbines for cogeneration applications
In this paper, the first and second laws of thermodynamics have been utilised to evaluate the performance of intercooled reheat regenerative gas turbine cogeneration plant. The effects of overall pressure ratio, cycle temperature ratio, pressure losses, and process steam pressure on energetic and exergetic efficiencies have been investigated. The results indicate that most of the exergy ...
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Climate Change-Driven Market Opportunities for Combined-Cycle Gas Turbines
Combined-cycle gas turbine cogeneration technology is currently enjoying wide popularity due to a variety of technological, environmental, and financial performance advantages relative to other technologies, specifically boilers. While the environmental performance advantages of this technology have focused on emissions of regulated air pollutants, such as sulfur oxides and nitrogen oxides, ...
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`Climate Change-Driven Market Opportunities for Combined-Cycle Gas Turbines,` presented at the AWMA 2001 Conference & Exhibition
Abstract Combined-cycle gas turbine cogeneration technology is currently enjoying wide popularity due to a variety of technological, environmental, and financial performance advantages relative to other technologies, specifically boilers. While the environmental performance advantages of this technology have focused on emissions of regulated air pollutants, such as sulfur oxides and nitrogen ...
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Sydney Water – 5 x sewage gas cogeneration sites - Case Study
Clarke Energy have been contracted by Worley Parsons on behalf of Sydney Water to design, supply and commission the GE Jenbacher cogeneration engine package, with exhaust gas heat recovery. The engines use the sewage gas produced by the on-site digesters to produce renewable power. In turn the heat generated by the engines through the combustion will go back to the digesters, increasing gas ...
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A Structured Approach to Steam System Improvement through Utility System Design and Optimisation
Optimal operation of site utility systems is becoming an increasingly important part of any successful business strategy as environmental, legislative and commercial pressures grow. A reliable steam model allows a clear understanding of the system and of any operational constraints. It can also be used to determine the true cost of improvement projects, relating any changes in steam demand back ...
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The effect of elevated inlet air temperature and relative humidity on Gas Turbine cogeneration system: exergy assessment
This research aims to quantify the exergy destructions of Gas Turbine (GT) cogeneration system under different inlet air temperatures and humidity. Three different cogeneration schemes were examined in this research: conventional GT, GT-Single Pressure HRSG and GT-Dual Pressure HRSG. A parametric study was carried out in terms of exergy destruction and second-law efficiency. The exergy ...
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12MWe combined heat and power plant plant renovation - Case Study
OWNER Societe De Cogeneration Picardie Socopic OPERATOR Dalkia Groupe EDF LOCATION Amiens, France PRODUCT Mars 100 Gas Turbine CUSTOMER VALUE Improved Energy Efficiency Quick Pay Back on Investment Societe De Cogeneration Picardie Socopic (SO.COPIC) is a producer and distributor of steam and air conditioning. SO.COPIC was searching for the right solution to renovating their old and oversized ...
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Capturing biogas from landfills – Case Study
Each day, millions of tons of municipal solid wastes are disposed of in sanitary landfills and dump sites around the world. Over 1,200 landfills worldwide collect landfill gas, which reduces greenhouse gas emissions and accrues emissions credits to meet the Environmental Protection Agency’s (EPA) reporting standards. Many also use this captured biogas as a clean energy source in the ...
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Mitigating CO2 emissions by adjusting the power generation mix in Taiwan
In this paper, we employ a multi-objective programming model to estimate the power generation mix trade-off between generation costs and CO2 emissions in Taiwan. Eight policy scenarios are simulated and compared to the reference and base cases. The empirical results show that, for the electricity sector, CO2 emissions in 2010 could be set at 120% of the 1990 level, by way of promoting ...
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Exergy analysis of a syngas fuelled cogeneration cycle for combined production of power and refrigeration
This communication presents a biomass fuelled cogeneration cycle for the combined production of power and refrigeration. The system is an integration of combined gas–steam cycle and absorption refrigeration cycle. A thermodynamic analysis through energy and exergy is employed, to investigate the effects of cycle pressure ratio, gas turbine inlet temperature and evaporator temperature on first–law ...
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VIYELLATEX improves factory efficiency thanks to cogeneration with gas engines
VIYELLATEX Limited is the composite knit apparel and textile manufacturing business unit of VIYELLATEX group. It started its operations in 1996. The company is comprised of design and product development, sample, knitting, washing, cutting, sewing and finishing sections. The Textile Testing Corporation (Testing Lab) is also a part of VIYELLATEX. It caters to major buyers such as Puma, S.Oliver, ...
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Biogas Plant in Verneuil, Dairy Cooperative - Case Study
In 2014, the dairy cooperative of Lochoise region, has awarded Clarke Energy the installation of a cogeneration module on its anaerobic digestion site, located at Verneuil-sur-Indre in Indre et Loire. The biogas plant which was established in 2014, consumes discharges from milk production, the wastewater treatment plant in the town, as well as several agricultural sites in the region. The main ...
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10 MWe Renewable Energy Solution - Landfill Gas to Energy Project - Case Study
OWNER PEI Power Corporation PROJECT ENGINEERING Concord Engineering Group PRODUCT Two Mercury 50 Gas Turbine Generator Sets CUSTOMER VALUE Environmentally Friendly Renewable Energy Source When PEI learned that Solar Turbines had recently modified their Mercury™ 50 gas turbine to burn landfill gas, the company contacted SolarTurbines. Intrigued with theturbine's high simple cycle ...
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The effect of precooling inlet air on CHP efficiency in natural gas pressure reduction stations
Almost all pressure reduction stations in Iran use expansion valves to reduce the natural gas pressure, which leads to wasting large amount of exergy. In this paper, a system is proposed which includes the modification of a conventional pressure reduction station with the addition of a turbo expander and a gas turbine for power recovery and generation. The next step is investigating the effect of ...
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Technical and economic analyses of a hydrogen-fed gas turbine with steam injection and co-generation
Enel has been working on a hydrogen programme dealing with both hydrogen production and uses. The first phase deals with a hydrogen-fed, gas turbine-based co-generative cycle, in which steam injection in the gas turbine itself is adopted in order to couple high process efficiencies with very low nitrous oxide emissions. This paper presents the main results of the co-generative cycle thermodynamic ...
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Energy conservation and electricity sector liberalisation in the Netherlands and the UK: case studies on the development of cogeneration of heat and power, wind energy and demand-side management as energy conservation options
In this article, the development of combined heat and power, wind energy and demand-side management in the UK and the Netherlands are compared. It is examined to what extent these developments are determined by liberalisation of the electricity sector in both countries. The analysis suggests that unbundling of generation and distribution, rather than privatisation or introduction of competition ...
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Harnessing biogas for energy savings
For Santa Cruz Wastewater Treatment Facility (WWTF), dependability matters. Since 1989, this state-of-the-art WWTF, nestled in a shallow canyon in the coastal city of Santa Cruz, Calif., has been leading the way for renewable energy programs and environmental protection in the West. Santa Cruz WWTF generates its own electric power by using internal combustion engines that burn a mixture of ...
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