COMBINED CYCLE PLANT UTILIZING SOLAR HEAT

摘要

A combined cycle plant equipped with: a gas turbine (2) driven by combustion gas obtained from a combustion chamber (3), which mixes and burns a gas turbine fuel (81) and combustion-use air obtained from a compressor (1); an exhaust heat recovery boiler (5) that generates steam using the exhaust gas (82) from the gas turbine (2) as a heat source; and a steam turbine (8), which is connected to the gas turbine (2) on one axis and is driven by steam obtained by the exhaust heat recovery boiler (5); wherein hot water is generated from replenishment water by a heat collector (21) using solar heat energy and is transmitted to a heat accumulator (19) and a spraying device (20). At the spraying device (20) hot water from the heat collector (21) is sprayed into air supplied to the compressor (1), and at the heat accumulator (19) the hot water is stored, and cooling steam is generated and supplied to the steam turbine (8). Thus it is possible to provide a combined cycle plant that uses solar heat and is able to start up quickly without increasing the amount of CO2 emissions, and that is able to operate with high efficiency even in an operating environment in which the atmospheric temperature varies.