Cogeneration Articles

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 ...

Nov. 29, 2018

By Powerphase

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 ...

Sep. 22, 2015

By Industrial Motor Power Corporation

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 ...

Jan. 15, 2015

By Wolf Power Systems GmbH

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 ...

Jul. 22, 2014

By Clarke Energy

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 ...

Mar. 11, 2013

By Inderscience Publishers

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 ...

Jan. 26, 2010

By Inderscience Publishers

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 ...

Feb. 19, 2009

By Inderscience Publishers

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 ...

Feb. 19, 2009

By Inderscience Publishers

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 ...

May 5, 2008

By Inderscience Publishers

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 ...

Jan. 16, 2007

By Inderscience Publishers

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 ...

May 14, 2006

By Inderscience Publishers

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 ...

Jun. 27, 2005

By Inderscience Publishers

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 ...

Nov. 14, 2004

By Inderscience Publishers