Mitsubishi Hitachi Power Systems, Ltd.

Kohei Shinozaki

Takahiro Marumoto

Tetsuo Shikata

Satoshi Tadakuma

Kazuhito Koyama

Jun Kashima

The time for steam generated in a low temperature heating device to reach a saturated steam temperature is reduced a low temperature heating device configured to heat supplied water by using heat of sunlight to generate steam; a steam separation device configured to separate two-phase water-steam fluid generated in the low temperature heating device into water and steam; and a high temperature heating device configured to heat the steam separated in the steam separation device by using heat of sunlight reflected by a plurality of heliostats to generate superheated steam.

Solar heat collection system and operation method thereof

Provided are a heliostat calibration, device and a heliostat calibration method that can suppress time-change-dependent control error increases and can reduce calibration frequency. The present invention is provided with: an initial position information acquisition unit that acquires initial position information for a heliostat; a theoretical value calculating unit that calculates from the heliostat initial position information and sun position information a theoretical value that is related to the orientation of the heliostat; a deviation calculation unit that, using as input an actual measured value for the orientation of the heliostat, calculates the deviation between the theoretical value and the actual measured value at least two times a day; and a coordinate calibration unit that, when the deviation exceeds a threshold value, calibrates the coordinates of the heliostat such that the deviation is at or below the threshold value.

Heliostat calibration device and heliostat calibration method

The inventive solar heat collection system reduces the risk of damage to heat transfer pipes of a high-temperature heat collection device. The low-temperature heat collection device () heats water by sunlight heat to generate steam. The steam-water separation device () separates a water-steam two-phase fluid generated in the low-temperature heat collection device into water and steam. The high-temperature heat collection device () heats the steam separated by the steam-water separation device by use of heat of sunlight reflected by a plurality of heliostats (), thereby generating superheated steam. The heliostat control device () controls angles of the plurality of heliostats so that metal temperature of the high-temperature heat collection device is maintained not to be higher than a threshold temperature set to prevent overshoot of steam temperature at an outlet of the high-temperature heat collection device.

Solar heat collection system

Provided is an inexpensive and simple solar power system. A solar power system according to the present invention includes: a heat collection apparatus (); a steam turbine (), a power generator (); a superheated steam supply line which supplies the steam turbine with superheated steam generated by the heat collection apparatus; a water supply line which condenses the steam expelled from the steam turbine into water and supplies the condensed water to the heat collection apparatus; a heat storage device () which has a heat storage medium; a first line which branches from the superheated steam supply line and which supplies the heat storage device with the superheated steam flowing through the superheated steam supply line; a second line which branches from the water supply line and which supplies the heat storage device with the water flowing through the water supply line; and a third line which supplies the steam turbine with superheated steam generated by the heat storage device. The heat storage device stores the heat of the superheated steam which has flowed through the first line in the heat storage medium, and heats the water which has flowed through the second line with the heat storage medium to thereby generate the superheated steam.

Growing community of inventors

Yokohama, Japan

Kohei Shinozaki