Fuel controller for gas turbine

Abstract

Abstract PURPOSE:To prevent the variation of output for an arbitrary mixing ratio by controlling a flow rate adjusting valve on the basis of the calorific power, specific gravity of each fuel, and the mixing ratio of the both fuels, in the use of two kinds of fuels having different calorific power. CONSTITUTION:After two kinds of fuels A and B having different calorific power are mixed in a prescribed mixing ratio in a mixing valve 3, and the flow rate of the mixed fuel is supplied into a conbustor by the control by a flow rate adjusting valve 4. The mixing valve 3 performs feedback control so that the measured mixing ratio RM calculated from the fuel flow rate QAM and QBM measured by the flow rate meters 1 and 2 becomes a prescribed mixing ratio Rs. The flow rate adjusting valve 4 performs feedback control so that the measured flow rate QM becomes a set flow rate Qs. The set flow rate Qs is obtained through the calculation from the volume heat generation coefficients XA and XB of the fuels A and B which are calculated from the low rank calorific power and specific gravity of each fuel A, B, mixing ratio Rs. and the fuel energy signal Es.

Inventors

• 👤 Yasumasa Nishijima
• 👤 Arata Kida

Bibliographic Details