Efficiency of steam reheating in heat recovery steam generator at thermal power plant with gas turbine topping

Romashova, Olga Yurievna; Минор, Александр Александрович; Martyshev, Vladimir; Tubolev, Aleksandr A.; Katalevskaya, Aleksandra Vladimirovna

doi:10.1051/matecconf/201711001054

Cited by 2 publications

(4 citation statements)

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“…But these substances are destroyed at temperatures above 400 С. Therefore, a CCGT of a trinary type was proposed on the basis of three cycles: higher -Brighton gas turbine cycle, average -Rankine cycle steam turbine and lower -ОRC [2][3][4][5][6]. The use of low-boiling substances (LBS) in ORC makes it possible to reliably remove heat in the AC at the temperature below 0 С [7], allows downsizing and installation costs of the turbine and condenser, and also makes it possible to significantly reduce water consumption for technological purposes.…”

Section: Matec Web Of Conferencesmentioning

confidence: 99%

Decision working medium for lower cycle CCGT trinary type

et al. 2017

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Abstract. The object of the study are low-boiling substances, which can be used as working fluid in the Organic Rankine cycle (ORC) combine cycle gas turbine (CCGT) trinary type. Purpose of research is search for substances with the best thermodynamic, thermophysical and ecological properties. The calculation algorithm represents a mathematical calculation of CCGT in which the lower cycle, operating on low-boiling fluid and utilizes low-potential heat, as an air-cooling device On the basis of available scientific and practical facts on the use of working fluids the organic Rankine cycle for analysis were selected ozone-safe refrigerant: butane, pentane, R236ea, R236fa, R123, R245ca, R245fа, R365mfc, RC318. For these substances were found and tabulated critical pressure and temperature, condensation pressure, density and dynamic viscosity at a given condensation temperature. Studies have shown that the highest thermal net efficiency is achieved when using natural Freon pentane and synthetic R365mfc. Net efficiency CCGT strongly depends on the condensation temperature of the substance. For example, when using pentane when the condensation temperature decreases on 10 С net efficiency increases about 0.71 %.

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Section: Matec Web Of Conferencesmentioning

confidence: 99%

Decision working medium for lower cycle CCGT trinary type

et al. 2017

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“…Advantages in the economics of such a solution for condensing units in comparison with displacement of regeneration are shown in [1]. At the same time, maximum efficiency of CCGT is reached at RH temperature equal to the nominal value.…”

Section: Introductionmentioning

confidence: 97%

“…There are various possibilities for reconstruction and extension of steam power stations durability, some of which are discussed in [1][2][3][4][5][6]. One of them involves gas turbine (GT) topping to increase efficiency and capacity.…”

Section: Introductionmentioning

confidence: 99%

“…Analysis of CCGT operation with K-300, T-250 steam turbine units shows that displacement of regeneration has significant disadvantages [1,2]: 1) efficiency of the steam cycle is reduced as a result of heat loss increase in condenser; 2) capacity of steam turbine decreases due to limitation of the maximum steam flow through the last stage of the turbine.…”

Section: Introductionmentioning

confidence: 99%

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