Abstract: A boiler plant includes a boiler which is configured to heat water by a heating fluid to generate steam, a steam utilization device which is configured to use the steam from the boiler, and a heating device which is configured to heat steam using at least energy excluding thermal energy of the heating fluid. The boiler has one or more evaporators which heat water or steam. A first evaporator having a highest internal pressure from among one or more evaporators is configured to heat water or steam having a temperature lower than a constant pressure specific heat maximum temperature, at which constant pressure specific heat in a pressure in the first evaporator is maximum, to be equal to or higher than the constant pressure specific heat maximum temperature. The heating device is configured to heat the steam having a temperature lower than the constant pressure specific heat maximum temperature to be equal to or higher than the constant pressure specific heat maximum temperature.

Abstract: Provided is a plant that includes: a boiler (30); a device connected to the boiler (30); a water supply source (41) that is configured to pool water; a water supply line (44) that supplies water from the water supply source (41) to the boiler (30); a cooler (50, 60g, 60s, 70g, 70s, 80) that transfers heat from a medium to be cooled to supply-water (W), which is the water flowing along the water supply line (44); a thermometer (59, 69, 79, 89) that determines a temperature of the medium to be cooled or the supply-water; and a temperature regulator (53, 62, 72, 82) that is configured to regulate the temperature of the medium to be cooled on the basis of the temperature determined by the thermometer (59, 69, 79, 89).

Abstract: A boiler includes one or more evaporators configured to heat water which has flowed therein to a specific heat maximum temperature at constant pressure or more in which a specific heat at constant pressure is maximized using a heated fluid and one or more reheaters configured to heat the steam which has come from the boiler using the heated fluid. All the reheaters configured to supply steam to a low-pressure steam turbine are disposed only at a downstream side of the high-pressure evaporator. All the reheaters heat reheating steam (FRHS) containing steam which has passed through a high-pressure steam turbine configured to receive steam supplied from the high-pressure evaporator and having a temperature lower than a specific heat maximum temperature at constant pressure in the high-pressure evaporator to less than the specific heat maximum temperature at constant pressure.

Abstract: A boiler including one or more evaporators, an economizer, and a low-temperature heat exchanger. The economizer is located on a downstream side of the most downstream evaporator which is an evaporator at the most downstream side among the one or more evaporators. The low-temperature heat exchanger is located on the downstream side of the economizer, has an inlet for receiving water from the outside, and is configured to heat the water introduced from the inlet and sent to the economizer with the combustion gas.

Abstract: An intake air cooling device includes a water supply line and a heat pump device. The water supply line sends water to a waste heat recovery boiler which generates steam using heat of an exhaust gas from a gas turbine. The heat pump device transfers heat of air suctioned by the gas turbine to water flowing through the water supply line and thereby cools the air while heating the water.

Abstract: A boiler includes one or more evaporators configured to heat water which has flowed therein to a specific heat maximum temperature at constant pressure or more in which a specific heat at constant pressure is maximized using a heated fluid and one or more reheaters configured to heat the steam which has come from the boiler using the heated fluid. All the reheaters configured to supply steam to a low-pressure steam turbine are disposed only at a downstream side of the high-pressure evaporator. All the reheaters heat reheating steam (FRHS) containing steam which has passed through a high-pressure steam turbine configured to receive steam supplied from the high-pressure evaporator and having a temperature lower than a specific heat maximum temperature at constant pressure in the high-pressure evaporator to less than the specific heat maximum temperature at constant pressure.

Abstract: A gas turbine including: a compressor that compresses air; a combustor that combusts fuel in the compressed air so as to generate combustion gas; and a turbine that is driven using the combustion gas. A plurality of cooling air coolers bleed the air from a plurality of places having different pressures in the compressor and cool the air bled from the respective places, thereby generating cooling air is provided. A waste heat recovery device that recovers waste heat from the at least two cooling air coolers among the plurality of cooling air coolers is provided.

Abstract: A waste heat recovery device includes: a low-boiling-point medium Rankine cycle in which a low-boiling-point medium circulates while the low-boiling-point medium is repeatedly condensed and evaporated; a heated water line that guides liquid water, which is heated here, to the low-boiling-point medium Rankine cycle from a waste heat recovery boiler; and a water recovery line that returns the water, which has passed through the low-boiling-point medium Rankine cycle, to the waste heat recovery boiler. The low-boiling-point medium Rankine cycle includes a heater that heats the low-boiling-point medium by exchanging heat between the low-boiling-point medium, which is a liquid, and liquid water, which has passed through the heated water line.

Abstract: In a turbine vane and a gas turbine, an outer shroud is fixed to one end of a vane body formed in a hollow shape, an inner shroud is fixed to the other end thereof, and a partition plate is fixed to the inner portions of the vane body, the outer shroud, and the inner shroud, so that a cavity is formed so as to be continuous between the partition plate and the group of the vane body, the outer shroud, and the inner shroud. Then, the vane body, the outer shroud, and the inner shroud are provided with a plurality of cooling holes, and the partition plate is provided with a plurality of penetration holes. Accordingly, since the vane structure or the end wall structure is evenly cooled, a deformation or damage may be suppressed.

Abstract: In a turbine vane and a gas turbine, an outer shroud is fixed to one end of a vane body formed in a hollow shape, an inner shroud is fixed to the other end thereof, and a partition plate is fixed to the inner portions of the vane body, the outer shroud, and the inner shroud, so that a cavity is formed so as to be continuous between the partition plate and the group of the vane body, the outer shroud, and the inner shroud. Then, the vane body, the outer shroud, and the inner shroud are provided with a plurality of cooling holes, and the partition plate is provided with a plurality of penetration holes. Accordingly, since the vane structure or the end wall structure is evenly cooled, a deformation or damage may be suppressed.