Method and apparatus for operating a solar thermal power plant
AssigneeSiemens Aktiengesellschaft
InventorsJan Brückner, Frank Thomas
Life of this patent
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Abstract
A solar thermal power plant, wherein, in an intermediate superheater in the water-steam circuit, steam is heated to a settable setpoint temperature value at the outlet by a heat carrier medium which has been heated solar-thermally, wherein, for the heating of the steam to a set setpoint temperature value, a mass flow of the heat carrier medium entering the intermediate superheater is controlled as a function of a determined enthalpy difference of the heat carrier medium between the entry and exit thereof into and out of the intermediate superheater and as a function of a determined enthalpy difference of the steam between the exit and entry thereof out of and into the intermediate superheater is provided.
Claims15
A method for operating a solar thermal power plant in which steam is heated in an intermediate superheater in a water/steam circuit by a solar-thermally heated heat transfer medium to an adjustable setpoint temperature value at an exit, comprising:
- in order to heat the steam to an adjusted setpoint temperature value, regulating a mass flow of the solar-thermally heated heat transfer medium entering the intermediate superheater as a function of an ascertained enthalpy difference of the solar-thermally heated heat transfer medium between its entry and exit into and out of the intermediate superheater and an ascertained enthalpy difference of the steam between its exit and entry out of and into the intermediate superheater.
An apparatus for operating a solar thermal power plant in which steam is heated in an intermediate superheater in a water/steam circuit by a solar-thermally heated heat transfer medium to an adjustable setpoint temperature value at an exit, comprising:
- a regulating device for a mass flow of the solar-thermally heated heat transfer medium entering the intermediate superheater;
- a mass flow setpoint value control device for controlling the regulating device as a function of an ascertained enthalpy difference of the solar-thermally heated heat transfer medium between its entry and exit into and out of the intermediate superheater and an ascertained enthalpy difference of the steam between its exit and entry out of and into the intermediate superheater;
- and
- a first module and a second module for ascertaining the enthalpy of the solar-thermally heated heat transfer medium at an entry and the exit, and a third module and a fourth module for ascertaining the enthalpy of the steam at the entry and the exit.
Dependencies are inferred from the claim text.