GAS TURBINE POWER GENERATING APPARATUS AND METHOD OF STARTING THE SAME

摘要

To provide a gas turbine power generating apparatus which is capable of igniting and starting while stably keeping the pressure balance of an entire system even if the capacity of the apparatus is increased by increasing the difference in outer diameter (outer diameter of turbine wheel > outer diameter of compressor impeller) between a compressor impeller (1) and a turbine wheel (6). In order to attain the purpose, the gas turbine power generating apparatus in which the structure of the combination of a centrifugal compressor and a radial-flow turbine is used is characterized in that the ratio of the outer diameter of the turbine wheel to the outer diameter of the compressor impeller is 1.15 or larger for the purpose of increasing the power generating output.