The present invention provides a steam generator capable of greatly improving energy efficiency, and an energy supply system that uses the steam generator. The steam generator of the present invention includes a high-temperature chamber to which heat of 250° C. to 800° C. is supplied; a low-temperature chamber arranged adjacent to the high-temperature chamber and configured to produce low-temperature steam of 50° C. to 185° C. from water using the heat of the high-temperature chamber; and at least one thermoelectric element arranged between the high-temperature chamber and the low-temperature chamber.

A hybrid steam power plant is disclosed using the steam generator as a sub-construction for a solar receiver.

A solar pumping system and a method for operating solar pumping system, the system comprises plurality of solar modules, at least one VFD comprising at least one convertor, at least one switching device connected to the solar module and the VFD and at least one AC motor connected to the output supply of the VFD. The switching device controls the supply of DC power transmitted to the VFD based on the input received from a controller of the VFD by varying the output voltage in accordance with the load requirement of the AC motor. The method comprising the steps of controlling the supply of voltage output of solar modules through the switching device as to provide adequate power to the solar pump based on the requirement of the motor in order to avoid tripping by increasing or decreasing the voltage output of the solar modules to a predetermined fraction of voltage for a predetermined fraction of time.

A thermal energy storage and retrieval device includes at least one working fluid and a plurality of thermodynamic circuits. Each thermodynamic circuit has a first process exchanging heat with a first material in a first temperature range common for all of the thermodynamic circuits. Each thermodynamic circuit also has a second process exchanging heat with a second material in a second temperature range. The second material comprises a heat storage material or a working fluid in another circuit or another device. Each thermodynamic circuit includes a gas pressure changing device and a liquid pressure changing device.

Supply assembly for a turbine of a solar thermodynamic system provided with plural multiple parabolic mirrors for heating a first thermal carrier fluid contained in a tank to a first temperature, comprising a column structure provided at the upper part with an exit. The column structure comprises: a lower portion provided with two inlets connected to the tank to be supplied with the first thermal carrier fluid, the lower portion comprising first and second heat exchangers supplied with a second thermal carrier fluid respectively to an overheated temperature and re-overheating temperature; an upper portion fluidically connected with the lower portion, the upper portion comprising a boiler to bring the second fluid from a pre-heating temperature to a boiling temperature, and a cylindrical body arranged on the boiler; a pre-heating and supplying structure for heating the second thermal carrier fluid to the pre-heating temperature and supply it to the column structure.

Supply assembly for a turbine of a solar thermodynamic system provided with plural multiple parabolic mirrors for heating a first thermal carrier fluid contained in a tank to a first temperature, comprising a column structure provided at the upper part with an exit. The column structure comprises: a lower portion provided with two inlets connected to the tank to be supplied with the first thermal carrier fluid, the lower portion comprising first and second heat exchangers supplied with a second thermal carrier fluid respectively to an overheated temperature and re-overheating temperature; an upper portion fluidically connected with the lower portion, the upper portion comprising a boiler to bring the second fluid from a pre-heating temperature to a boiling temperature, and a cylindrical body arranged on the boiler; a pre-heating and supplying structure for heating the second thermal carrier fluid to the pre-heating temperature and supply it to the column structure.

A solar aided coal-fired power generation system participating in primary frequency regulation and a control method thereof propose a system configuration with two regulation schemes by coupling medium-low-temperature solar collectors and a coal-fired generation unit. The two regulation schemes are a high-pressure feedwater bypass scheme and a low-pressure condensate bypass scheme. The present invention formulates a primary frequency regulation control logic, so as to efficiently and accurately participate in the primary frequency regulation, thereby keeping the power grid frequency rapidly stable. The present invention also formulates a working fluid outlet temperature control logic for the solar aided coal-fired thermal system, which adjusts a heat exchange working fluid flow of the solar collectors to ensure that the temperature in each section is stable during the primary frequency regulation. The present invention uses operation matching of the turbine system and the solar collectors to improve effectiveness of the primary frequency regulation.

A method for modifying a solar thermal power plant operating on conventional oil based technology into a hybrid solar thermal power plant includes: providing an oil-based solar thermal power plant, which includes a solar collection system with at least one radiation absorber tube containing a heat transfer oil to be heated by the solar collection system; providing a molten salts solar thermal power plant, which includes a solar collection system to heat a molten salts mixture; and coupling the respective plants such that the hybrid solar thermal power plant is configured to heat medium temperature steam generated by the oil based solar power plant by the molten salts mixture thereby producing high temperature steam and subsequently supplying it to a steam turbine to generate electricity.

A solar power system includes a solar energy collector that has at least one solar receiver that is operable to carry a working fluid and at least one solar reflector that is operable to direct solar energy towards the at least one solar receiver to heat the working fluid. The working fluid has a maximum predefined operational temperature up to which it can be heated. A first storage unit is connected to receive the working fluid from the at least one solar receiver, and a second storage unit is connected to provide the working fluid to the at least one solar receiver. A power block generates electricity using heat from the heated working fluid. A heater is operable to heat the working fluid to approximately the maximum predefined operational temperature.

A solar hybrid power plant comprises a combustion turbine generator, a steam power system, a solar thermal system, and an energy storage system. Heat from the solar thermal system, from the energy storage system, or from the solar thermal system and the energy storage system is used to generate steam in the steam power system. Heat from the combustion turbine generator exhaust gas may be used primarily for single phase heating of water or steam in the steam power system. Alternatively, heat from the combustion turbine generator exhaust gas may be used in parallel with the energy storage system and/or the solar thermal system to generate steam, and additionally to super heat steam. Both the combustion turbine generator and the steam power system may generate electricity.