| 摘要 |
PROBLEM TO BE SOLVED: To depress the expansion of a facility scale, the reinforcement of piping and device material, and an increase in the usage of a heating medium such as auxiliary steam relative to a variation in required heating rate caused by a flactuation in the pressure and temperature of a fuel gas supplied to a gas turbine and by a flactuation in fuel consumption and to supply fuel gas at an appropriate temperature. SOLUTION: This fuel gas pressure reduction and heating equipment has: a heater 1 placed at a fuel gas supply system for a gas turbine and used for heating a fuel gas; a bypass pipe conduit 3 for bypassing part of the fuel gas passing through the heater 1; a flow rate adjusting valve provided on the pipe conduit; and a pressure reduction device 2 placed at the downstream side of the heater 1 and used for pressure-reducing the gas heated by the heater 1. Fuel gas temperature at the outlet of the pressure reduction device is controlled by controlling the flow rate adjusting valve. The heating medium supply system of the heater is provided with a heating medium shut-off valve 7 for shutting off the flow of the heating medium. When the supplied fuel gas is not required for heating, the heating medium shut-off valve 7 shuts off the heating medium.
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