WO2012120016A1 - Receiver for a beam down power plant, system with the receiver and use of the system - Google Patents

Receiver for a beam down power plant, system with the receiver and use of the system Download PDF

Info

Publication number
WO2012120016A1
WO2012120016A1 PCT/EP2012/053840 EP2012053840W WO2012120016A1 WO 2012120016 A1 WO2012120016 A1 WO 2012120016A1 EP 2012053840 W EP2012053840 W EP 2012053840W WO 2012120016 A1 WO2012120016 A1 WO 2012120016A1
Authority
WO
WIPO (PCT)
Prior art keywords
receiver
fluidized bed
power plant
beam down
down power
Prior art date
Application number
PCT/EP2012/053840
Other languages
French (fr)
Inventor
Dan Sagie
Original Assignee
Siemens Concentrated Solar Power Ltd.
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Concentrated Solar Power Ltd., Siemens Aktiengesellschaft filed Critical Siemens Concentrated Solar Power Ltd.
Publication of WO2012120016A1 publication Critical patent/WO2012120016A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/79—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with spaced and opposed interacting reflective surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S80/20—Working fluids specially adapted for solar heat collectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D13/00—Heat-exchange apparatus using a fluidised bed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Definitions

  • the invention is in the field of the concentrated solar power generation and relates to the tower technique, particularly its beam-down variation.
  • Concentrated solar power systems use optics, for example lenses or mirrors, to concentrate a large area of sunlight, or solar thermal energy, onto a small area. Electrical power is produced when the concentrated light is converted to heat which drives a heat engine, typically a steam turbine, connected to an electrical power generator.
  • the beam-down arrangement of optics was proposed in Ari Rabl, Tower Reflector for solar plant, Solar energy 1976; 18: 269-271.
  • electrical power can be generated by concentrating sun rays with a heliostat or reflector field and directing them towards a beam-down reflector held by a tower and then towards a solar energy-to-heat transducer (receiver) , which may be positioned in a focus of the beam-down mirror and on the ground level.
  • the receiver assembly and a power block e.g. the heat engine with the electrical power generator, can be readily installed and maintained on the ground level.
  • the beam-down scheme can be considered as a variation of the ordinary tower scheme in which the tower holds not the mirror, but the receiver.
  • a suitable beam-down mirror has to be provided for the beam-down scheme.
  • a portion of solar energy is lost on the beam-down mirror.
  • the receivers in the tower solar power generation are typically volumetric.
  • the receivers may contain molten salt.
  • a receiver for a beam down power plant comprising at least one fluidized bed.
  • the fluidized bed comprises at least one holding vessel with a quantity of solid particles.
  • the present invention provides a novel system and method for solar power generation.
  • the main idea of the invention is to utilize as a receiver a fluidized bed.
  • a fluidized bed is formed when a quantity of a solid particulate substance (usually present in a holding vessel) is placed under appropriate conditions to cause the solid/ fluid mixture to behave as a fluid. This is usually achieved by the introduction of pressurized fluid through the particulate medium. This results in the medium then having many properties and characteristics of normal fluids; such as the ability to free-flow under gravity, or to be pumped using fluid type technologies. The resulting phenomenon is called fluidization .
  • the contact of the solid particles with the fluidization medium (a gas or a liquid) is greatly enhanced when compared to packed beds .
  • a system with at least one such receiver is provided as well as a use of the system in a beam down power plant.
  • a receiver for a beam down power plant comprising at least one fluidized bed.
  • the fluidized bed comprises at least one holding vessel with a quantity of solid particles.
  • the fluidized bed comprises additional thermal isolation on an upper part of the fluidized bed.
  • the fluidized bed is located in a focus of a beam down reflector of a beam down power plant.
  • at least one additional optical concentrator is arranged between the beam down reflector and the fluidized bed.
  • the figure shows a heliostat field.
  • DETAILED DESCRIPTION OF THE INVENTION a system for solar power generation.
  • This system is schematically shown on Fig. 1.
  • the system (10) includes a heliostat field (2), a tower (4a), a beam-down reflector (4b) held by the tower, and a fluidized bed (6) with an optical window (8) on its upper side.
  • the heliostats are configured and positioned to concentrate sun radiation and direct it towards the beam-down reflector.
  • the latter reflector is configured to concentrate the rays and to direct them in the direction of the ground to the optical window of the fluidized bed.
  • the fluidized bed may be located in a focus of the beam-down reflector.
  • the reflector may be a mirror; in particular, a mirror with a hyperboloidal surface.
  • the system may include one or more additional optical components
  • the bed includes a movable cover adapted to provide additional thermal isolation to the bed on its upper side when the cover covers the optical window. The cover thus may be employed to protect the bed from losing the heat when the sun radiation is low and does not compensate for the heat loss.
  • the fluidizing fluid in the bed is air.
  • the fluid is steam. More generally, the fluid is of the type that allows the particles suspension effect along the desired temperature range. While heat storage is inherent to such arrangement, temperature limitations arise from the building materials.
  • fluidized bed particles directly absorb the solar radiation. In some embodiments, the absorption by the particles exceeds the absorption by the walls of the fluidized bed.
  • the system may include a circuit for the fluidizing fluid.
  • the circuit may be closed.
  • the system may include a heat transfer fluid circuit for a heat transfer fluid.
  • the fluid can be air, steam, C02, or another fluid used in a power or thermodynamic cycle.
  • the circuit may be closed.
  • the fluidizing fluid and the heat transfer fluid can be the same fluid. Further, they may utilize the same fluid circuit.
  • the holding vessel of the fluidized bed may substantially form a pipe.
  • the pipe is oriented vertically. In some embodiments the pipe is oriented horizontally.
  • the bed may include a heat exchanger facilitating the heating of the heat transfer fluid.
  • the system may include not one, but a cluster of the fluidized beds receiving radiation from the same beam-down reflector.
  • the system may include a heat exchanger located in a cluster area but external to the beds .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

A receiver for a beam down power plant is provided, wherein the receiver comprises at least one fluidized bed. The fluidized bed comprises at least one holding vessel with a quantity of solid particles. Additionally a system with the receiver is provided as well as a use of the system in a beam down power plant.

Description

Description
RECE IVER FOR A BEAM DOWN POWER PLANT , SYSTEM WI TH THE RECE IVER AND USE OF THE SYSTEM
BACKGROUND OF THE INVENTION
1. Field of the invention
The invention is in the field of the concentrated solar power generation and relates to the tower technique, particularly its beam-down variation.
2. Description of the related art
Concentrated solar power systems use optics, for example lenses or mirrors, to concentrate a large area of sunlight, or solar thermal energy, onto a small area. Electrical power is produced when the concentrated light is converted to heat which drives a heat engine, typically a steam turbine, connected to an electrical power generator. The beam-down arrangement of optics was proposed in Ari Rabl, Tower Reflector for solar plant, Solar energy 1976; 18: 269-271. Within the beam-down concept, electrical power can be generated by concentrating sun rays with a heliostat or reflector field and directing them towards a beam-down reflector held by a tower and then towards a solar energy-to-heat transducer (receiver) , which may be positioned in a focus of the beam-down mirror and on the ground level. The receiver assembly and a power block, e.g. the heat engine with the electrical power generator, can be readily installed and maintained on the ground level.
The beam-down scheme can be considered as a variation of the ordinary tower scheme in which the tower holds not the mirror, but the receiver. However, a suitable beam-down mirror has to be provided for the beam-down scheme. Also, a portion of solar energy is lost on the beam-down mirror. The receivers in the tower solar power generation are typically volumetric. The receivers may contain molten salt.
SUMMARY OF THE INVENTION
There is a need in the art for an efficient solar power generator. As well, there is a need in the art for a convenient in installation and use solar power generator. A receiver for a beam down power plant is provided, wherein the receiver comprises at least one fluidized bed. The fluidized bed comprises at least one holding vessel with a quantity of solid particles.
The present invention provides a novel system and method for solar power generation. The main idea of the invention is to utilize as a receiver a fluidized bed. A fluidized bed is formed when a quantity of a solid particulate substance (usually present in a holding vessel) is placed under appropriate conditions to cause the solid/ fluid mixture to behave as a fluid. This is usually achieved by the introduction of pressurized fluid through the particulate medium. This results in the medium then having many properties and characteristics of normal fluids; such as the ability to free-flow under gravity, or to be pumped using fluid type technologies. The resulting phenomenon is called fluidization . In fluidized beds, the contact of the solid particles with the fluidization medium (a gas or a liquid) is greatly enhanced when compared to packed beds . Additionally a system with at least one such receiver is provided as well as a use of the system in a beam down power plant.
The invention can be summarized as follows: A receiver for a beam down power plant is provided, wherein the receiver comprises at least one fluidized bed. Preferably the fluidized bed comprises at least one holding vessel with a quantity of solid particles. In an embodiment the fluidized bed comprises additional thermal isolation on an upper part of the fluidized bed. In a further embodiment the fluidized bed is located in a focus of a beam down reflector of a beam down power plant. In a further embodiment at least one additional optical concentrator is arranged between the beam down reflector and the fluidized bed. BIEF DESCRIPTION OF THE DRAWING
Further features and advantages of the invention are produced from the description of an exemplary embodiment with reference to the drawing. The drawings are schematic.
The figure shows a heliostat field. DETAILED DESCRIPTION OF THE INVENTION Hence, in a one broad aspect of the invention there is provided a system for solar power generation. This system is schematically shown on Fig. 1. The system (10) includes a heliostat field (2), a tower (4a), a beam-down reflector (4b) held by the tower, and a fluidized bed (6) with an optical window (8) on its upper side. The heliostats are configured and positioned to concentrate sun radiation and direct it towards the beam-down reflector. The latter reflector is configured to concentrate the rays and to direct them in the direction of the ground to the optical window of the fluidized bed. The fluidized bed may be located in a focus of the beam-down reflector. The reflector may be a mirror; in particular, a mirror with a hyperboloidal surface.
The system may include one or more additional optical
concentrators, arranged in the optical path between the beam-down reflector and the fluidized bed. In some embodiments, the bed includes a movable cover adapted to provide additional thermal isolation to the bed on its upper side when the cover covers the optical window. The cover thus may be employed to protect the bed from losing the heat when the sun radiation is low and does not compensate for the heat loss. In some embodiments, the fluidizing fluid in the bed is air. In some embodiments the fluid is steam. More generally, the fluid is of the type that allows the particles suspension effect along the desired temperature range. While heat storage is inherent to such arrangement, temperature limitations arise from the building materials.
In some embodiments, fluidized bed particles directly absorb the solar radiation. In some embodiments, the absorption by the particles exceeds the absorption by the walls of the fluidized bed.
The system may include a circuit for the fluidizing fluid. The circuit may be closed. The system may include a heat transfer fluid circuit for a heat transfer fluid. The fluid can be air, steam, C02, or another fluid used in a power or thermodynamic cycle. The circuit may be closed. In some embodiments, the fluidizing fluid and the heat transfer fluid can be the same fluid. Further, they may utilize the same fluid circuit.
The holding vessel of the fluidized bed may substantially form a pipe. In some embodiments the pipe is oriented vertically. In some embodiments the pipe is oriented horizontally.
The bed may include a heat exchanger facilitating the heating of the heat transfer fluid.
The system may include not one, but a cluster of the fluidized beds receiving radiation from the same beam-down reflector. The system may include a heat exchanger located in a cluster area but external to the beds .

Claims

Patent claims
1. Receiver for a beam down power plant, wherein the receiver comprises at least one fluidized bed.
2. Receiver according to claim 1, wherein the fluidized bed comprises at least one holding vessel with a quantity of solid particles .
3. Receiver according to claim 1 or claim 2, wherein the fluidized bed comprises at least one additional thermal isolation on an upper part of the fluidized bed.
4. System with at least one receiver according to claim 1, wherein the fluidized bed is located in a focus of a beam down reflector of a beam down power plant.
5. System according to claim 4, wherein at least one additional optical concentrator is arranged between the beam down reflector and the fluidized bed.
6. Use of the system according to claim 4 or 5 in a beam down power plant .
PCT/EP2012/053840 2011-03-07 2012-03-07 Receiver for a beam down power plant, system with the receiver and use of the system WO2012120016A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161449788P 2011-03-07 2011-03-07
US61/449,788 2011-03-07

Publications (1)

Publication Number Publication Date
WO2012120016A1 true WO2012120016A1 (en) 2012-09-13

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WO (1) WO2012120016A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20150365A1 (en) * 2015-04-21 2016-10-21 Balderrie Energies Gmbh Solar energy collection device by means of a concentrator of the non-imaging type.
ES2648148A1 (en) * 2017-03-09 2017-12-28 Universidad Carlos Iii De Madrid Solar linear downlink optical system (Machine-translation by Google Translate, not legally binding)
JP2020514658A (en) * 2017-02-01 2020-05-21 マガルディ パワー ソシエタ ペル アチオニ Energy efficient apparatus, system and method for using solar-derived thermal energy
WO2022038487A1 (en) * 2020-08-19 2022-02-24 King Abdullah University Of Science And Technology A solar-powered, temperature cascading system for electricity generation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015161921A1 (en) * 2014-04-21 2015-10-29 Jon Otegui Van Leeuw Thermal solar power generation system
CN108036522A (en) * 2017-11-08 2018-05-15 哈尔滨理工大学 A kind of internal-circulation type fluid bed-solar energy particle receiver

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US4038557A (en) * 1975-02-12 1977-07-26 Gildersleeve Jr Oliver Dep Particulate energy absorber
GB2073869A (en) * 1980-04-15 1981-10-21 Us Energy Solar heated gasification apparatus
US4455153A (en) * 1978-05-05 1984-06-19 Jakahi Douglas Y Apparatus for storing solar energy in synthetic fuels
US20080011290A1 (en) * 2006-05-11 2008-01-17 Brightsource Energy, Inc. High temperature solar receiver
CN101122422B (en) * 2007-05-10 2010-12-08 中国科学院电工研究所 Fluid bed high temperature heat absorber for solar energy tower type thermal generation and its heat absorbing-heat storage double fluid bed system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038557A (en) * 1975-02-12 1977-07-26 Gildersleeve Jr Oliver Dep Particulate energy absorber
US4455153A (en) * 1978-05-05 1984-06-19 Jakahi Douglas Y Apparatus for storing solar energy in synthetic fuels
GB2073869A (en) * 1980-04-15 1981-10-21 Us Energy Solar heated gasification apparatus
US20080011290A1 (en) * 2006-05-11 2008-01-17 Brightsource Energy, Inc. High temperature solar receiver
CN101122422B (en) * 2007-05-10 2010-12-08 中国科学院电工研究所 Fluid bed high temperature heat absorber for solar energy tower type thermal generation and its heat absorbing-heat storage double fluid bed system

Non-Patent Citations (1)

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Title
ARI RABL: "Tower Reflector for solar plant", SOLAR ENERGY, vol. 18, 1976, pages 269 - 271

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20150365A1 (en) * 2015-04-21 2016-10-21 Balderrie Energies Gmbh Solar energy collection device by means of a concentrator of the non-imaging type.
WO2016170485A1 (en) * 2015-04-21 2016-10-27 Balderrie Energies Gmbh Device for collecting solar energy by means of a concentrator of the nonimaging type
JP2020514658A (en) * 2017-02-01 2020-05-21 マガルディ パワー ソシエタ ペル アチオニ Energy efficient apparatus, system and method for using solar-derived thermal energy
US11143435B2 (en) * 2017-02-01 2021-10-12 Magaldi Power S.P.A. High energy-efficient device, system and method for the use of thermal energy of solar origin
JP7008712B2 (en) 2017-02-01 2022-01-25 マガルディ パワー ソシエタ ペル アチオニ High energy efficiency devices, systems and methods for using solar-origin thermal energy
AU2018215597B2 (en) * 2017-02-01 2023-04-13 Magaldi Power S.P.A. High energy-efficient device, system and method for the use of thermal energy of solar origin
ES2648148A1 (en) * 2017-03-09 2017-12-28 Universidad Carlos Iii De Madrid Solar linear downlink optical system (Machine-translation by Google Translate, not legally binding)
WO2022038487A1 (en) * 2020-08-19 2022-02-24 King Abdullah University Of Science And Technology A solar-powered, temperature cascading system for electricity generation
US12071938B2 (en) 2020-08-19 2024-08-27 King Abdullah University Of Science And Technology Solar-powered, temperature cascading system for electricity generation

Also Published As

Publication number Publication date
CN202757307U (en) 2013-02-27
CN102679588A (en) 2012-09-19

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