Coupled chemical-thermal solar power system and method
A power generation system and solar energy technology, applied in a coupled chemical-thermal solar power generation system and its fields, can solve the problems of low operating temperature, low conversion efficiency of solar power cycle conversion efficiency, etc.
Inactive Publication Date: 2015-09-02
ABENGOA SOLAR
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Problems solved by technology
Heat-to-electricity conversion systems are very similar to fossil fuel systems at comparable temperatures, however, due to the lower operating temperatures, the conversion efficiencies of solar power cycles are generally much smaller than those of combined cycle gas plants
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[0021] Unless otherwise indicated, all numbers expressing amounts of ingredients, dimensions, reaction conditions, etc. used in the specification and claims are to be understood as being modifiable in all instances by the term "about".
[0022] In this specification and claims, the use of the singular includes the plural unless stated otherwise. Additionally, the use of "or" means "and / or" unless stated otherwise. Furthermore, the use of the term "comprising" as well as other forms such as "comprises" and "comprises" is not limiting. Furthermore, terms such as "element" or "component" include both elements and components comprising one unit and elements and components comprising more than one unit, unless specifically stated otherwise.
[0023] As noted above, known CSP systems typically operate at significantly lower overall efficiencies when compared to combined cycle gas-fired power plants. The reduced efficiency of the CSP system is mainly due to the lower operating temp...
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A CSP system is disclosed which couples a thermal and a chemical energy pathway. The thermal pathway utilizes a heat transfer fluid to collect concentrated sunlight as thermal energy at medium temperature and transfer this energy to a thermal-to-electric power cycle. In parallel, the chemical pathway uses a redox material which undergoes direct photoreduction in the receiver to store the solar energy as chemical potential. This redox material is then oxidized at very high temperatures in the power cycle in series with the thermal pathway heat exchanger. This coupling allows the receiver to perform at the high efficiencies typical of state of the art thermal power towers while simultaneously achieving the power cycle efficiencies typical of natural gas combustion plants and achieving a very high overall solar-to-electric conversion efficiency.
Description
technical field [0001] Embodiments disclosed herein include systems and methods in the field of concentrated solar power ("CSP") (also known as solar thermal power). The disclosed systems and methods generally utilize two parallel coupled energy paths, a thermal path and a chemical path, to efficiently convert solar energy into electrical energy. Specifically, the disclosed embodiments include a solar receiver in communication with separate chemical energy storage materials and a heat transfer fluid flowing or conveying in separate pathways. Chemical energy storage materials undergo low-temperature photoreduction at the receiver. Additionally, heat transfer fluid ("HTF") is heated to operating temperature at the solar receiver. Chemical energy storage materials and HTF are used to drive power cycles that work at relatively high temperatures, because the chemical energy storage material is oxidized and exothermic while the HTF is cooling, or the HTF is cooled and the chemical...
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IPC IPC(8): F24J2/04F24J1/00F24S20/20F24S23/70F24S90/00F24V30/00
CPCF24J2/07F24J2/42F24J1/00F28D20/003F28D2020/0047Y02E10/44Y02E10/46Y02E70/30F24S90/00F24V30/00F24S20/20F24S10/20F24S80/20F24S60/20Y02E60/14F03G6/06F24S23/70Y02E10/40
Inventor 卢克·埃里克森拉塞尔·穆伦
Owner ABENGOA SOLAR