Repowering combined cycle power plants by a modified STIG configuration

Carapellucci, Roberto; Milazzo, Adriano

doi:10.1016/j.enconman.2006.11.024

Cited by 42 publications

(21 citation statements)

References 5 publications

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“…is modelled by means of mass and energy balances. A detailed analysis has thus been carried out, simulating the proposed repowering scheme with real data from present day power generating plants [19].…”

Section: Discussion Of Repowering Performancementioning

confidence: 99%

“…The scheme described above has been numerically studied using a modular simulation code [19], based on fundamental thermodynamic relations. In this simulation code each power plant component (gas and steam turbines, condensers, heat exchangers etc.)…”

Section: Discussion Of Repowering Performancementioning

confidence: 99%

“…The major drawback of this configuration is water consumption related to the flow entering the new HRSG, which is inevitably lost at the stack. This can limit the applicability of the present scheme to sites with large fresh water availability, though the specific water requirements are fairly low, as shown in [19].…”

Section: Description Of the Repowering Schemementioning

confidence: 99%

“…As discussed in [19], it is based on the addition of a gas turbine and a heat recovery steam generator to an existing combined cycle. The integration of new components into the baseline combined cycle is achieved by injecting the steam generated by the additional HRSG into the combustion chamber of the existing combined cycle.…”

Section: Description Of the Repowering Schemementioning

confidence: 99%

See 3 more Smart Citations

The Recovery of Exhaust Heat from Gas Turbines

Carapellucci¹,

Giordano²

2012

Efficiency, Performance and Robustness of Gas Turbines

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Section: Discussion Of Repowering Performancementioning

confidence: 99%

Section: Discussion Of Repowering Performancementioning

confidence: 99%

Section: Description Of the Repowering Schemementioning

confidence: 99%

Section: Description Of the Repowering Schemementioning

confidence: 99%

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The Recovery of Exhaust Heat from Gas Turbines

Carapellucci¹,

Giordano²

2012

Efficiency, Performance and Robustness of Gas Turbines

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“…This means that increased steam flow has to be managed by the low pressure section of the original steam turbine, requiring either extensive modification of the steam turbine or impairing the repowered plant performance. The other option, boiler repowering, entails major steam generator redesign [2]. Energy systems involve a large number and various types of interactions with the world outside their physical boundaries.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Repowering in a Gas Fired Steam Power Plant Based on Exergy and Exergoeconomic Analysis

Baghestani

Ziabasharhagh

Maneshr

2011

Linköping Electronic Conference Proceedings

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Increased competition among power generating companies, changes in generating system load requirements, lower allowable plant emissions, and changes in fuel availability and cost accentuate the need to closely assess the economics and performance of older electric generating units. Generally, decisions must be made as to whether these units should be retired and replaced with new generation capacity, whether capacity should be purchased from other generation companies, or if these existing units should be repowered. These decisions usually require the evaluation of many factors. The analysis is usually complicated due to the interaction of all the factors involved. In this paper, evaluation of a 156MW steam power plant and proposed repowered scenario has been performed. The exergy and exergoeconomic analysis method was applied in order to evaluate the proposed repowered plant. Simulation of each case has been performed in Thermoflow software. Also, computer code has been developed for exergy and exergoeconomic analysis. It is anticipated that the results provide insights useful to designers into the relations between the thermodynamic losses and capital costs, it also helps to demonstrate the merits of second law analysis over the more conventional first law analysis techniques.

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Combined cycle power plant performance evaluation using exergy and energy analysis

Pattanayak¹,

Sahu

Mohanty

2017

Env Prog and Sustain Energy

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Performance evaluation of a combined cycle power plant (CCPP) is generally attempted using first law of thermodynamics based on energy and mass balance methodology. For detailed component wise performance analysis, exergy‐based evaluation based on second law of thermodynamics is gaining increasing importance. In this study, a CCPP consisting of triple pressure steam cycle with reheat is analyzed using both energy and exergy. Effect of ambient temperature, inlet and exhaust pressure loss, CCPP load, excess air percentage, cooling water temperature, and condenser vacuum has been investigated. Energy and exergy‐based performances are compared and presented. The simulation results show that efficiency of CCPP decreases with increase in the inlet and exhaust pressure loss and with increase in inlet air temperature to compressor. The total power output of CCPP decreases at higher inlet air temperature with increase of steam flow rate in bottoming cycle and increase in compressor power consumption. The exergy efficiency of combustion chamber, heat recovery steam generator, and condenser are found to be 77.48%, 87.20%, and 29%, respectively; and the overall exergy and energy efficiency of the unit at 100% design and operating condition is found to be 54.09%, 58.26% and 53.92%, 57.10%, respectively. The overall exergetic efficiency of the CCPP can be improved by reducing the losses in bottoming cycle. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1180–1186, 2017

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Repowering combined cycle power plants by a modified STIG configuration

Cited by 42 publications

References 5 publications

The Recovery of Exhaust Heat from Gas Turbines

The Recovery of Exhaust Heat from Gas Turbines

Evaluation of Repowering in a Gas Fired Steam Power Plant Based on Exergy and Exergoeconomic Analysis

Combined cycle power plant performance evaluation using exergy and energy analysis

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