Parametric study of HRSG in case of repowered industrial CHP plant

Liszka, M.; Manfrida, Giampaolo; Ziębik, A.

doi:10.1016/s0196-8904(02)00107-3

Cited by 15 publications

(6 citation statements)

References 1 publication

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“…The optimization of the HRSG operating parameters can increase the performance of the plant. Also, the pinch analysis can maximize the CCPP efficiency [12].…”

Section: Exergy Lossmentioning

confidence: 99%

Exergy analysis of a 420 MW combined cycle power plant

Ameri¹,

Ahmadi²,

Khanmohammadi³

2008

Int. J. Energy Res.

225

106

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SUMMARYCombined cycle power plants (CCPPs) have an important role in power generation. The objective of this paper is to evaluate irreversibility of each part of Neka CCPP using the exergy analysis. The results show that the combustion chamber, gas turbine, duct burner and heat recovery steam generator (HRSG) are the main sources of irreversibility representing more than 83% of the overall exergy losses. The results show that the greatest exergy loss in the gas turbine occurs in the combustion chamber due to its high irreversibility. As the second major exergy loss is in HRSG, the optimization of HRSG has an important role in reducing the exergy loss of total combined cycle. In this case, LP-SH has the worst heat transfer process.The first law efficiency and the exergy efficiency of CCPP are calculated. Thermal and exergy efficiencies of Neka CCPP are 47 and 45.5% without duct burner, respectively. The results show that if the duct burner is added to HRSG, these efficiencies are reduced to 46 and 44%. Nevertheless, the results show that the CCPP output power increases by 7.38% when the duct burner is used.

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“…The optimization of the HRSG operating parameters can increase the performance of the plant. Also, the pinch analysis can maximize the CCPP efficiency [12].…”

Section: Exergy Lossmentioning

confidence: 99%

Exergy analysis of a 420 MW combined cycle power plant

Ameri¹,

Ahmadi²,

Khanmohammadi³

2008

Int. J. Energy Res.

225

106

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“…In the work [25], the results are reported of the energy and exergy analyses of three Moreover, there are no such analyses in the literature. The available sources focus mainly on the advantages related to the increase of efficiency, reduction of specific emission of pollutants or increase of power [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Some sources also describe cogeneration systems with gas turbine [18,19] and trigeneration system with gas turbine [20][21][22].…”

Section: Figurementioning

confidence: 99%

Power and Frequency Control in the National Power System of the 370 MW Coal Fired Unit Superstructured with a Gas Turbine

et al. 2020

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A very important task of power units with high power capacity is their participation in the control of the national power system. One of the most important questions posed at work is whether a 370 MW power unit superstructured with a gas turbine in parallel and a heat recovery steam generator be able to take part in the national power system control and if such an upgrade will be economically effective. The analysis was carried out using a proprietary and novel mathematical model. The model takes into account, among others, the influence of the ambient temperature on the parameters of the gas turbine and the changes in thermal steam parameters at its steam extractions as a result of load changes. The results of the analyses showed that it is possible for the modernized unit to participate in the power system control. It can be done only by using a gas turbine with a variable power and a shut off option. The presented results of economic calculations show that at price and cost levels assumed for calculations, the turbine gas superstructure is at the threshold of viability and the investment carries a high degree of risk.

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“…HRSG is among the devices of the greatest exergetic losses. With the selection of the right distribution of heating surfaces in the HRSG using several simulation tools and a pinch analysis can maximize the efficiency (Liszka et al, 2003). In addition, optimization of the HRSG operating parameters increases the performance of the plant.…”

Section: Energy-exergy Analysis Of a Combined-cycle Power Plantmentioning

confidence: 99%

Energy-exergy analysis and modernization suggestions for a combined-cycle power plant

Cihan

Hacıhafızogˇlu

Kahveci

2006

Int. J. Energy Res.

122

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SUMMARYEnergy and exergy analysis were carried out for a combined-cycle power plant by using the data taken from its units in operation to analyse a complex energy system more thoroughly and to identify the potential for improving efficiency of the system. In this context, energy and exergy fluxes at the inlet and the exit of the devices in one of the power plant main units as well as the energy and exergy losses were determined. The results show that combustion chambers, gas turbines and heat recovery steam generators (HRSG) are the main sources of irreversibilities representing more than 85% of the overall exergy losses. Some constructive and thermal suggestions for these devices have been made to improve the efficiency of the system.

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Parametric study of HRSG in case of repowered industrial CHP plant

Cited by 15 publications

References 1 publication

Exergy analysis of a 420 MW combined cycle power plant

Exergy analysis of a 420 MW combined cycle power plant

Power and Frequency Control in the National Power System of the 370 MW Coal Fired Unit Superstructured with a Gas Turbine

Energy-exergy analysis and modernization suggestions for a combined-cycle power plant

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