초록 ▼

A fuel supply method for a gas turbine combustor having first and second stage combustion chambers. The method comprises supplying the fuel from only first stage fuel supply from the start of the gas turbine until its low output range so as to operate only the first stage combustion chamber, supplyi

A fuel supply method for a gas turbine combustor having first and second stage combustion chambers. The method comprises supplying the fuel from only first stage fuel supply from the start of the gas turbine until its low output range so as to operate only the first stage combustion chamber, supplying the fuel from both first and second stage fuel supply in a high output range of the gas turbine including its maximum output so as to operate both first and second stage combustion chambers. The method makes it possible to reduce NOx without deteriorating the combustion performance by step-wise supplying a predetermined flow rate of the fuel when the second stage fuel is to be supplied and at the same time, step-wise reducing the same quantity of the fuel that is being supplied from the first stage fuel supply.

대표청구항 ▼

A method for supplying a fuel for a gas turbine combustor of the type which introduces high pressure air and a fuel thereinto and combusts the fuel and air to generate a high temperature turbine operating gas, and which includes a first stage combustion chamber having a first stage fuel supply means

A method for supplying a fuel for a gas turbine combustor of the type which introduces high pressure air and a fuel thereinto and combusts the fuel and air to generate a high temperature turbine operating gas, and which includes a first stage combustion chamber having a first stage fuel supply means and an air supply means each disposed upstream of said combustor, and a second stage combustion chamber having a second stage fuel supply means and an air supply means each disposed downstream of said first stage fuel supply means, the method comprising the steps of supplying the fuel only from said first stage fuel supply means to only operate said first stage combustion chamber from the start of operation of said gas turbine until the gas turbine combustor is in a low output range; and supplying in a step change such that a fuel flow rate changes more rapidly than in normal load control the fuel from said second stage fuel supply means to be at a predetermined flow rate and at the same time, decreasing in the step change substantially the same quantity of the fuel, that is being supplied from said first fuel supply means, when the second stage fuel is to be supplied and wherein the second stage fuel to be supplied in a step change into the second combustion chamber is excessively charged above a predetermined value for a short period of time and, at the same time, the first stage fuel to be decreased in the step change is excessively reduced below a predetermined value.