Power generation facility
A power generation facility in an embodiment includes: a boiler; a high-pressure turbine to which steam generated in the boiler is introduced; a low-pressure turbine provided downstream of the high-pressure turbine; and a condenser that condenses steam discharged from the low-pressure turbine. The power generation facility further includes: a feed pipe that leads feedwater in the condenser to the boiler; a heat storage and steam generation device that has a heat storage function that uses surplus energy generated in an own system to store heat, and a steam generation function that has part of feedwater led by the feed pipe introduced thereinto and turns the feedwater into steam by the stored heat; and a steam supply pipe that supplies steam generated in the heat storage and steam generation device to an own system.
1 . A power generation facility comprising:
a boiler that generates steam;
a first steam turbine into which the steam generated in the boiler is introduced;
a second steam turbine provided downstream of the first steam turbine in a flow direction of steam flow;
a condenser that condenses steam discharged from the second steam turbine;
a feed pipe that leads condensed water condensed in the condenser to the boiler as feedwater;
a heat storage and steam generation device having a heat storage function that uses surplus energy to store heat, and a steam generation function that has part of the feedwater led by the feed pipe introduced thereinto and turns the feedwater into a second steam by the stored heat; and
a first steam supply pipe that supplies the second steam generated in the heat storage and steam generation device to a component included in the power generation facility,
wherein the surplus energy is surplus electric power, and the heat storage and steam generation device includes a thermoelectric converter that generates the heat by the surplus electric power, and the heat storage and steam generation device uses the surplus electric power to store the heat generated by the thermoelectric converter, and
wherein the heat storage and steam generation device includes:
a container filled with a chemical heat storage material;
a heat exchange pipe arranged between the chemical heat storage materials inside the container;
the thermoelectric converter that is arranged between the chemical heat storage material inside the container and uses the surplus electric power, which is the surplus energy, to generate the heat;
a water supply pipe that supplies water or water vapor to the chemical heat storage material; and
a drain pipe that discharges water or water vapor generated by the chemical heat storage material,
when the heat is stored in the heat storage and steam generation device,
the surplus electric power is supplied to the thermoelectric converter, and
the water or water vapor generated by the chemical heat storage material is discharged through the drain pipe, and
when the second steam is generated in the heat storage and steam generation device,
the water or water vapor is supplied from the water supply pipe to the chemical heat storage material,
the feedwater is supplied from the feed pipe to the heat exchange pipe, and
steam generated in the heat exchange pipe is supplied to the first steam supply pipe.
2 . The power generation facility according to claim 1 , further comprising:
a third steam turbine provided between the first steam turbine and the second steam turbine in the flow direction of the steam flow;
a reheat boiler that reheats steam discharged from the first steam turbine; and
a high-temperature reheat steam pipe that introduces reheated steam reheated in the reheat boiler into the third steam turbine.
3 . A power generation facility, comprising:
a boiler that generates steam;
a first steam turbine into which the steam generated in the boiler is introduced;
a second steam turbine provided downstream of the first steam turbine in a flow direction of steam flow;
a third steam turbine provided between the first steam turbine and the second steam turbine in the flow direction of the steam flow;
a reheat boiler that reheats steam discharged from the first steam turbine; and
a high-temperature reheat steam pipe that introduces reheated steam reheated in the reheat boiler into the third steam turbine;
a condenser that condenses steam discharged from the second steam turbine;
a feed pipe that leads condensed water condensed in the condenser to the boiler as feedwater;
a heat storage and steam generation device having a heat storage function that uses surplus energy to store heat, and a steam generation function that has part of the feedwater led by the feed pipe introduced thereinto and turns the feedwater into a second steam by the stored heat; and
a first steam supply pipe that supplies the second steam generated in the heat storage and steam generation device to a component included in the power generation facility, wherein
the surplus energy is surplus electric power, and
the heat storage and steam generation device includes a thermoelectric converter that generates the heat by the surplus electric power, and the heat storage and steam generation device uses the surplus electric power to store the heat generated by the thermoelectric converter, and
the component included in the power generation facility to which the second steam is supplied by the first steam supply pipe is the second steam turbine.