How does CCGT work?
A CCGT Power station is currently the most efficient form of large power generation with an efficiency of over 55%. This compares to coal-fired power stations, which have an efficiency of around 32%. Power is produced in two phases which are designed to maximise operational efficiency and minimise emissions: Stage 1 – Gas turbine At the start of the power generation process, gas is burnt to power gas turbines that rotate at high speed. This rotation is used to drive an electric generator that produces electricity supply, which is fed into the National Grid. Stage 2 – Heat Recovery Steam Generators (HRSG) In the second phase, heat contained in the gas turbine exhaust is fed back into the process via a closed-loop water system (similar in principle to the way in which a car’s water system captures engine heat which can then be used by the vehicle’s heater). The hot gases produced as a result of combustion in the turbines are captured by a heat recovery steam generator (HRSG), which produ
