By Ryszard Bartnik
The potential for repowering the present condensing strength stations through gasoline turbogenerators bargains an immense chance to significantly development in their strength potency. The Modernization power of gasoline generators within the Coal-Fired strength offers the method, calculation approaches and instruments used to aid company making plans for adapting strength stations to dual-fuel gas-steam combined-cycle applied sciences. either the conceptual and sensible elements of the conversion of current coal-fired strength crops is roofed. Discussions of the feasibility, merits and downsides and attainable equipment are supported through chapters providing equations of strength potency for the stipulations of repowering an influence unit via fitting a fuel turbogenerator in a parallel approach and the result of technical calculations concerning the choice heating constructions of warmth restoration steam turbines. a technique for reading thermodynamic and monetary effectiveness for the choice of a constitution of the warmth restoration steam generator for the repowered strength unit can also be defined. The Modernization capability of gasoline generators within the Coal-Fired energy is an informative monograph written for researchers, postgraduate scholars and coverage makers in energy engineering.
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Extra resources for The Modernization Potential of Gas Turbines in the Coal-Fired Power Industry: Thermal and Economic Effectiveness
1 Results of Thermodynamic Calculations 51 where: eel zq ? dserv specific sales price of electric energy (per energy unit), annual rate of investment service and remaining fixed cost relative to capital expenditure [1, 3, 4], sA time of annual operation of the power plant. This can ensure that the improvement of the thermodynamic parameters of the modernized power unit as a result of installing greater number of pressure stages in a heat recovery steam generator is cost-effective. References 1.
20): 6 Selection of the Structure of the Heat 600 (0; 578) 550 (0; 540) 500 (67,01; 464,5) 450 2 1 400 (124,4; 366,6) o Temperatute [ C] 47 350 (67,01; 356,6) 3 (124,4; 356,6) 300 (171,57; 286,1) (183,7; 265,9) 4 (171,57; 255,9) 250 5 (183,7; 255,9) (209,31; 221,6) 6 200 (209,31; 186,5) 150 (209,31; 157,3) (286,42; 90) 100 7 50 (286,42; 47) 0 0 25 50 75 100 125 150 175 200 225 250 275 300 Stream of heat Q transferred from the exhaust gas into a water and steam [MW] Fig. 2 Composition curves in a dual-pressure heat recovery steam generator.
Annually the time for such operation is limited to around 600 h/a. The maximum admissible pressure in the condenser is equal to 17–18 kPa, despite the fact that the calculated (reference) pressure in it can reach as much as 25 kPa. For this value the protection equipment brings about shut-down of the turbine (then we have to do with the idle work of the boiler). However, problems start to occur from exceeding the pressure of around 18 kPa, which is often possible during the summer season. 2 MPa.