Cogeneration Articles

  • Equal to Removing 1 Million Cars from the Road Case Study

    Powerphase commissioned a grid level analysis to assess how Turbophase technology could increase existing natural gas combined cycle gas turbine (GT) efficiencies in Florida, displacing baseload coal-fired generation and inefficient peaking plants to reduce electricity costs and pollution. Today’s electricity prices in Florida are higher than the national average, and while most of this ...


    By Powerphase

  • Natural Gas Overlooked in Obama's Clean Power Plan

    NatGas: The Unnoticed Bridge to Achieving Obama's Clean Power Initiative Los Angeles, CA – (September 18, 2015) – It is now apparent that the Obama Administration’s Clean Power Plan aims to significantly reduce the amount of power generated by coal. It’s a game changer for utilities, mining companies and equipment suppliers. And, it’s ...

  • Eilstorfer Bioenergie case study

    In 2011, Eilstorfer Bioenergie built a biogas plant fed on sustainable materials. It is a community installation shared by several farmers cooperating in a joint energy project. Aside from the digester, the plant comprises of three Dreyer & Bosse CHP units. One CHP unit is located at the biogas plant to ensure the supply of heat required for the digester and adjacent pig rearing ...


    By Wolf Power Systems GmbH

  • Renovation of Dalkia’s Cogeneration Plant at Bron - Case Study

    In 2009 Dalkia France informed Clarke Energy that it was going to replace their cogeneration plant at the Bron Parilly site, of which they are the operator. This was the first time Clarke Energy renovated a cogeneration plant on site. Three GE’s Jenbacher JMS616 GS-NL gas fuelled power plants were renovated at site for this ...


    By Clarke Energy

  • 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 ...


    By Inderscience Publishers

  • Exergy analysis of a cogeneration system through Artificial Neural Network (ANN) method

    The main objective of this study is to apply the Artificial Neural Network (ANN) method to a cogeneration system, located in Izmir, Turkey, for exergetic evaluation purposes. The data used are based on the actual operational conditions and the results obtained from this system, which was exergetically analysed by the authors. It consists of three turbines with a total capacity of 13 MW, six spray ...


    By Inderscience Publishers

  • An exergy-based method for allocating carbon dioxide emissions from cogeneration systems

    Many companies, government agencies and researchers have sought means to allocate emissions for cogeneration systems. Some work has been carried out in this area, but the results obtained thus far are not universally accepted, and often are inconsistent, overly complex and difficult to use, and not based on sound reasoning. In this paper, an exergy-based method for allocating emissions for ...


    By Inderscience Publishers

  • Exergy optimisation of a Brayton cycle-based cogeneration plant

    An endoreversible Brayton cycle-based cogeneration plant has been optimised based on the dimensionless total exergy output rate criterion with a constraint on power-to-heat ratio. An optimal pressure ratio parameter and the maximum dimensionless total exergy output rate have been numerically determined. The optimisation results have been compared with those based on the total useful energy rate ...


    By Inderscience Publishers

  • Effect of exergy optimisation on a cogeneration system's CO2 emissions according to different demand patterns

    The objective of this work is to verify how different operational strategies affect the CO2 emissions of a cogeneration system according to different demand patterns. The operation strategies studied were focused in running cost and exergetic efficiency. The results show that the optimal exergetic efficiency strategy generated the highest emissions reduction. The operation with the highest ...


    By Inderscience Publishers

  • Exergy analysis of a natural gas fired combined cycle power generation unit

    Combined cycle power generation units are becoming popular due to their higher energy conversion efficiency and reduced pollutants and greenhouse gas emissions. In the present work, exergy analysis of a natural gas fired combined cycle power generation unit is performed to investigate the effect of gas turbine inlet temperature and pressure ratio on exergetic efficiency for the plant and exergy ...


    By Inderscience Publishers

  • Thermodynamic and thermoeconomic comparison of combined cycle cogeneration systems

    In this paper, several configurations of combined cycle cogeneration systems are investigated by energy, exergy and thermoeconomic analyses. In each of these configurations, varying steam demand is considered rather than fixed steam demand. Among the different approaches for thermoeconomic analysis in the literature, the specific exergy costing method is applied. Since the systems have more than ...


    By Inderscience Publishers

  • Thermal exergy optimisation for an irreversible cogeneration power plant

    The optimal design model, based on exergy analysis, of an irreversible cogeneration cycle has been presented using finite-time thermodynamics. The external irreversibility is due to the thermal resistance between the system and the heat reservoirs while the internal irreversibility is due to the non-isentropic compression and expansion process within the system. The internal irreversibility of ...


    By Inderscience Publishers

  • Exergoeconomic optimisation of a Kalina cycle for power generation

    It is shown that the use of an ammonia-water Kalina absorption power cycle as a bottoming cycle for a cogeneration plant may result in an economic advantage. This cycle was optimised using as a goal function the exergoeconomic unitary cost of the electricity produced by both the cogeneration plant and the absorption cycle. The Zoutendijk method of feasible directions was used for this ...


    By Inderscience Publishers

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