The coal-fired, closed-cycle gas turbine (CCGT) heat engine cycle is being developed for the cogeneration of process heat and power. The coal burning heater that provides the heat input to the gas turbine cycle is one of the more costly and technically challenging components of such systems. This paper discusses the interrelationships between the technical and economic feasibility of the heater and the CCGT cycle parameters, i.e., temperature, pressure ratio, working fluid, pressure level, etc. A mathematical relationship between the cycle parameters and the heaters’ working fluid side heat transfer coefficient is presented. Conclusions are presented regarding the zones of applicability of the available heater concepts to the spectrum of possible CCGT cycle parameters.

Volume Subject Area:
Cycle Innovations
Topics:
Combined heat and power, Cycles, Coal, Heat, Closed-cycle gas turbines, Combustion, Fluid pressure, Fluids, Gas turbines, Heat engines, Heat transfer coefficients, Pressure, Temperature
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