Working fluid selection in steam cycle with heat recovery steam generator (CROSBI ID 577247)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Čehil, Mislav ; Bogdan, Željko ; Lončar, Dražen ; Katulić, Stjepko
engleski
Working fluid selection in steam cycle with heat recovery steam generator
In heat recovery steam generators (HRSGs) the temperature differences between an inlet flue gases temperature and a steam turbine inlet temperature are significantly lower in relation to those differences in conventional steam generators. So a pinch point phenomenon limits a working fluid mass flow and consequently the flue gases in HRSG can not be sufficiently cooled. To avoid a high HRSG flue gases outlet temperature a multi pressure HRSGs are used with a water as working fluid. To obtain a high thermodynamic efficiency of a steam cycle with HRSG the water as working fluid must have a high pressure. So to find out an influence of the working fluid selection on thermodynamic efficiency a thermodynamic model of a single pressure HRSG is made. Analysis is made for water and for various organic working fluid. The thermodynamic efficiency of the cycle as well as pinch point phenomenon are taken into consideration. Thermal efficiencies of a plant are presented in dependance of a steam turbine inlet pressure and temperature. The data presented in this paper can be used to determine the optimal working fluid with respect to the HRSG flue gases inlet temperature as well as to select the optimal steam turbine inlet pressure and temperature of the working fluid in order to maximize the power plant thermodynamic efficiency.
Heat recovery steam generator; waste heat utilization; pinch point; thermodynamic efficiency; organic Rankine cycle; working fluids
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Podaci o prilogu
2011.
objavljeno
Podaci o matičnoj publikaciji
CD proceedings of 6th Conference on Sustainable Development of Energy, Water and Environment Systems – SDEWES Conference. Dubrovnik, Croatia, 2011.
Podaci o skupu
6th Dubrovnik Conference on Sustainable Development of Energy, Water and Environment Systems
predavanje
25.11.2011-29.11.2011
Dubrovnik, Hrvatska