Abstract: Electric power obtained by wind power generation is used effectively. A power generation system in an embodiment includes: a wind power generation apparatus; a solar thermal power generation apparatus; and an electrothermal converting unit. The solar thermal power generation apparatus includes: a heater heating a heating medium by solar heat; and a heat exchanger exchanging heat of the heating medium heated by the heater and heat of a working fluid to operate a drive mechanism of a power generator. The electrothermal converting unit converts part of electric power generated by the wind power generation apparatus into heat to heat the heating medium.

Abstract: In one embodiment, an exhaust heat collecting system of collecting exhaust heat in a fluid treatment system. The fluid treatment system includes a fluid path to convey at least an operating fluid or a cooled fluid among first and second heat source fluids, the operating fluid and the cooled fluid. The fluid treatment system further includes a fluid treatment module including an expansion module, a power generator and a condenser for the operating fluid, or including a heat absorbing module and a heat releasing module for the cooled fluid. The exhaust heat collecting system includes a water path to heat water by using the condenser or the heat releasing module, and a heater to heat the water from the water path by using the first or second heat source fluid or the operating fluid to produce the water to be used as hot water or to produce steam.

Abstract: In one embodiment, a solar heat collecting system includes a heat collector configured to heat a heat medium by a sunray, a heating device configured to heat a heat utilizing fluid by heat of the heat medium, and a heat medium flow path configured to circulate the heat medium between the heat collector and the heating device. The system further includes a controller configured to control circulation of the heat medium in the heat collector in accordance with an amount of solar radiation of the sunray, or in accordance with a temperature difference between a first temperature of the heat medium at a first position and a second temperature of the heat medium at a second position located downstream of the first position with respect to the heat medium.

Abstract: A power generating system includes a flow dividing structure, a first detector, a flow dividing adjusting valve, a heat accumulator, a heat exchanger and a turbine. The flow dividing structure divides a first heat medium into a first flow path and a second flow path. The first detector detects a flow rate of the first heat medium. The flow dividing adjusting valve opens the second flow path when the flow rate of the first heat medium exceeds a predetermined value. The heat accumulator accumulates the first heat medium via the second flow path and delivers the first heat medium at a temporally leveled flow rate. The heat exchanger transfers heat from the first heat medium to a second heat medium having a lower boiling point than the first heat medium. The turbine rotationally moves by the second heat medium with heat having been transferred by the heat exchanging unit.

Abstract: Electric power obtained by wind power generation is used effectively. A power generation system in an embodiment includes: a wind power generation apparatus; a solar thermal power generation apparatus; and an electrothermal converting unit. The solar thermal power generation apparatus includes: a heater heating a heating medium by solar heat; and a heat exchanger exchanging heat of the heating medium heated by the heater and heat of a working fluid to operate a drive mechanism of a power generator. The electrothermal converting unit converts part of electric power generated by the wind power generation apparatus into heat to heat the heating medium.

Abstract: The object of the present invention is to carry out a highly efficient power generation or to efficiently use an exhaust heat of a low temperature. A steam turbine plant includes a steam turbine 1 and a heating unit configured to heat a working fluid to be supplied to the steam turbine 1. The heating unit includes a first heat source 14 using a fossil fuel or a second heat source 8 using an extracted steam from the steam turbine 1, and a third heat source 44 not using a fossil fuel but using a waste exhaust combustion gas.

Abstract: In one embodiment, a power generating system includes; a flow dividing unit configured to divide a first heat medium supplied thereto to a first flow path and a second flow path; and a heat accumulating unit configured to accumulate the first heat medium sent thereto via the second flow path and deliver the first heat medium at a temporally leveled flow rate. The system further includes: a heat exchanging unit configured to transfer heat from the first heat medium sent thereto via the first flow path and the first heat medium delivered thereto from the heat accumulating unit, to a second heat medium that is lower in boiling point than the first heat medium; and a turbine configured to rotationally move with the second heat medium to which heat has been transferred by the heat exchanging unit.