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WO2011101485A1 - Tube capteur de chaleur solaire pour génération directe de vapeur, réflecteur cylindro-parabolique muni du tube capteur de chaleur solaire et utilisation du réflecteur cylindro-parabolique - Google Patents

Tube capteur de chaleur solaire pour génération directe de vapeur, réflecteur cylindro-parabolique muni du tube capteur de chaleur solaire et utilisation du réflecteur cylindro-parabolique Download PDF

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Publication number
WO2011101485A1
WO2011101485A1 PCT/EP2011/052586 EP2011052586W WO2011101485A1 WO 2011101485 A1 WO2011101485 A1 WO 2011101485A1 EP 2011052586 W EP2011052586 W EP 2011052586W WO 2011101485 A1 WO2011101485 A1 WO 2011101485A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
heat receiver
solar heat
space
internal
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2011/052586
Other languages
English (en)
Inventor
Avraham Brenmiller
Rami Ezer
Eli Lipman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Concentrated Solar Power Ltd
Siemens Corp
Original Assignee
Siemens AG
Siemens Concentrated Solar Power Ltd
Siemens Corp
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 AG, Siemens Concentrated Solar Power Ltd, Siemens Corp filed Critical Siemens AG
Publication of WO2011101485A1 publication Critical patent/WO2011101485A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • 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
    • F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
    • 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
    • Y02E10/44—Heat exchange systems

Definitions

  • parabolic trough collector with the solar heat receiver tube and use of the parabolic trough collector
  • This invention relates a solar receiver tube for direct steam generation, a parabolic trough collector with the solar heat receiver tube and a use of the parabolic trough collector.
  • a sun energy collecting unit of a sun field power plant based on the concentrated solar power technique comprises for instance a parabolic trough collector with at least one parabolic mirror and at least one solar heat receiver tube.
  • the solar heat receiver tube is arranged in a focal line of the mirror.
  • a heat transfer fluid e.g. a thermo-oil.
  • the energy of the sunlight is coupled into the heat transfer fluid. Solar energy is converted to thermal energy .
  • the heat transfer fluid with the absorbed thermal energy is piped to a heat exchanger. Water that passes through the heat exchanger becomes steam. The steam runs into a turbine. The turbine is coupled to a generator which produces electricity. Replacing the thermo-oil as the heat transfer fluid by steam (direct steam generation) is an important target. By that operating costs can be reduced. Moreover an efficiency of steam generation is increased by eliminating the step of heat transfer from the thermo-oil to the water.
  • a further object of the invention is to provide a use of the parabolic trough collector.
  • a solar heat receiver tube for direct steam generation comprising at least one outer absorber tube with an internal absorber tube space and at least one inner water tube with an internal water tube space for carrying water.
  • the inner water tube is arranged in the internal absorber tube space.
  • the outer absorber tube and the inner water tube are formed and arranged such that solar energy can be
  • a parabolic trough collector comprising at least one parabolic mirror having a sunlight reflecting surface for concentrating sunlight in a focal line of the parabolic mirror and at least one solar heat receiver tube which is arranged in the focal line of the parabolic mirror .
  • the outer absorber tube is coated by a selective solar coating.
  • solar energy can be absorbed and can be coupled into the inner water tube for the steam generation.
  • a solar energy absorptive coating selective solar coating
  • Such an absorptive coating can provide a high solar absorbance (low solar reflectivity) for wavelengths of solar spectrum (absorption radiation) and a low emissivity (high reflectivity) for infrared radiation.
  • the solar heat receiver tube comprises different partial surfaces.
  • the solar heat receiver tube comprises a first partial heat receiver tube surface and a second partial heat receiver tube surface.
  • the first partial heat receiver tube surface is formed by a selective solar (absorptive) coating.
  • the second partial heat receiver tube surface is formed by an emission radiation inhibiting coating for inhibiting an emissivity for infrared radiation.
  • an emission inhibiting coating is a Copper coating.
  • a solar heat receiver tube with such coatings is arranged in the focal line of a parabolic mirror such that the first partial surface with the selective absorptive coating is opposite to the sunlight reflecting surface of the parabolic mirror.
  • emission inhibiting coating is averted to the sunlight reflecting surface of the parabolic mirror.
  • the inner water tube can be symmetrically located inside the outer absorber tube.
  • the outer absorber tube and the inner water tube are concentrically arranged to each other
  • the outer absorber tube and the inner water tube are not arranged concentrically to each other.
  • the inner water tube is arranged asymmetrically concerning a space diameter of the outer absorber tube. This is advantageous with respect to asymmetrically distributed sunlight radiation and flux distribution around the outer absorber tube.
  • the inner water tube is fixed in the internal absorber tube space by at least one fixing element.
  • the fixing element is arranged in the internal space of the outer absorber tube.
  • the fixing element is a fixing tube with an inner fixing tube space.
  • Both the inner water tube and the fixing tube are arranged inside the outer absorber tube.
  • the inner water tube and the fixing tube are preferably formed and attached to each other that the water tube is asymmetrically fixed inside the outer absorber tube.
  • the internal absorber tube space and/or the internal fixing tube space comprise at least one filler material which is selected from the group consisting of a heat transfer material and a heat storage material (heat storage medium) .
  • the filler material comprises high thermal conductivity and/or high thermal capacity. This has the advantage, that thermal energy can be transferred efficiently from the outer absorber tube to the inner water tube.
  • the heat transfer material comprises preferably graphite.
  • suitable inorganic materials like Alumina (Aluminium Oxide, AI 2 O 3 ) are possible, too.
  • the heat storage material is for instance a Nitrate salt of a mixture of different Nitrate salts. Additionally, mixtures of different kinds of heat transfer materials and/or mixtures of different heat storage materials can be used. In order to improve the physical and chemical stability and the thermal characteristics of the solar heat receiver tube and in order to maximize the efficiency of the heat transfer some other measures are additionally implemented. Such measures concern for instance the used materials, e.g.
  • the solar heat receiver tube comprises at least one jacket tube for enveloping at least partially the outer absorber tube.
  • the jacket tube comprises at least one transparent jacket tube wall, which is at least partially transparent for absorption radiation of the
  • the absorption radiation is that sunlight which is absorbed by the outer absorber tube. At least partially transparent is given in the case that a transmission for the absorption radiations is more than 80% and preferably more than 90%.
  • the jacket tube is preferably a glass tube and the jacket tube wall is a glass tube wall. Between the outer absorber tube and the jacket tube wall there is a gap. This gap is evacuated. This means that a gas pressure in the gap is less than 10 ⁇ 2 mbar and preferably less than 10 ⁇ 3 mbar. This has the advantage that a thermal heat transfer away from the absorber tube by convection is reduced. The thermal energy doesn't dissipate and is substantially completely available for the direct steam generation in the water tube.
  • At least one gas elimination device for eliminating gas form a vapor phase of the outer absorber space is provided.
  • the device is a pump, located at the ends of the outer absorber tube.
  • the device comprises a membrane.
  • the membrane can be used as one way valve allowing a draining of the gas.
  • the gas elimination device is formed in order to eliminate hydrogen (3 ⁇ 4) .
  • One problem by the using of solar heat receiver tubes is the hydrogen permeation from the absorber tube into the evacuated jacket annulus between the absorber tube and the jacket tube wall. In comparison to the conventional thermo-oil technique the problem of the hydrogen permeation is increased by the direct steam generation.
  • the gas elimination device can be a getter for Hydrogen.
  • the getter is located within the absorber tube space.
  • each of the tubes can be optimized (materials, size, etc.) based on their specific requirements (inner water tube: hydraulic
  • outer absorber tube optical purposes
  • relatively thin tubes with low tube weights are possible. For instance: By using relatively small diameters for the inner water tube a wall thickness can be reduced. Small wall thicknesses lead to a low weight of the water tube and reduce the costs for the water tube.
  • a stable and high efficiency in a wide range of radiation levels can be reached by using optimized water tube and absorber tube diameters. This is advantageous due the impact of different solar radiation through different seasons and different hours of the day.
  • the whole system comprises an inherent thermal inertia.
  • Figure 1 shows a cross section of a solar heat receiver tube.
  • Figure 2 shows a cross section of parabolic through collector with the solar heat receiver tube.
  • the solar heat receiver tube (DSG receiver) 1 comprises an inner water tube 11 for steam generation and an outer
  • the absorber tube 10 Within the internal water tube space 111 the steam generation can occur.
  • the inner water tube 11 is located in the internal space 101 of the outer absorber tube 11.
  • the outer absorber tube is coated by a selective solar coating (not shown) .
  • the outer absorber tube 10 and the inner water tube 11 are formed and arranged such that solar energy (solar radiation) can be absorbed by the outer absorber tube 10 and absorbed solar (thermal) energy can be transferred from the outer absorber tube 10 to the inner water tube 11 for the steam generation within the internal water tube space 101.
  • solar energy solar radiation
  • thermal energy solar energy
  • the internal absorber tube space 101 and the internal fixing tube spaces 121 are filled with graphite and/or other heat transfer materials 13.
  • at least one of the spaces are filled with a heat storage material like a mixture of different Nitrate salts.
  • the internal absorber tube space 101 and the fixing tube spaces 121 are filled with both, a heat transfer material and a heat storage material.
  • the solar heat receiver tube 1 is enveloped by a glass tube (jacket tube) 14 with a glass tube wall 141.
  • the glass tube wall 141 is transparent for the absorption radiations with a transmission of more than 90%.
  • a gas pressure of the jacket annulus is about 10 ⁇ 3 mbar.
  • the heat solar receiver tube 1 is part of a parabolic trough collector 100.
  • the parabolic trough collector 100 comprises at least one parabolic mirror 2 with a sunlight reflective surface 21. By the reflective surface 21 sunlight is

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention concerne un tube capteur de chaleur solaire pour génération directe de vapeur, comportant au moins un tube absorbeur extérieur doté d'un espace interne de tube absorbeur et au moins un tube intérieur à eau doté d'un espace interne de tube à eau servant à transporter de l'eau. Le tube intérieur à eau est placé dans l'espace interne de tube absorbeur. Le tube absorbeur extérieur et le tube intérieur à eau sont formés et placés de telle sorte que de l'énergie solaire puisse être absorbée par le tube absorbeur extérieur et que l'énergie solaire absorbée puisse être transférée du tube absorbeur extérieur au tube intérieur à eau afin de générer de la vapeur dans l'espace interne de tube à eau. À l'intérieur du tube à eau, de l'eau liquide peut être transformée en eau vaporisée. L'invention concerne également un réflecteur cylindro-parabolique muni d'au moins un tube capteur de chaleur solaire placé sur une ligne focale d'un miroir parabolique. Le réflecteur cylindro-parabolique est utilisé dans une centrale à énergie solaire pour convertir de l'énergie solaire en énergie électrique.
PCT/EP2011/052586 2010-02-22 2011-02-22 Tube capteur de chaleur solaire pour génération directe de vapeur, réflecteur cylindro-parabolique muni du tube capteur de chaleur solaire et utilisation du réflecteur cylindro-parabolique Ceased WO2011101485A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30669110P 2010-02-22 2010-02-22
US61/306,691 2010-02-22

Publications (1)

Publication Number Publication Date
WO2011101485A1 true WO2011101485A1 (fr) 2011-08-25

Family

ID=44072356

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/052586 Ceased WO2011101485A1 (fr) 2010-02-22 2011-02-22 Tube capteur de chaleur solaire pour génération directe de vapeur, réflecteur cylindro-parabolique muni du tube capteur de chaleur solaire et utilisation du réflecteur cylindro-parabolique

Country Status (1)

Country Link
WO (1) WO2011101485A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103090551A (zh) * 2011-10-31 2013-05-08 杭州三花研究院有限公司 一种太阳能接收器
ITMI20120809A1 (it) * 2012-05-11 2013-11-12 Eni Spa Impianto termodinamico a concentrazione solare
WO2015069201A1 (fr) * 2013-11-11 2015-05-14 Hse Hitit Solar Enerji Anonim Sirketi Tube de collecteur de chaleur
CN107606593A (zh) * 2017-08-11 2018-01-19 桂林电子科技大学 一种基于表面局域光热转换的蒸汽发生装置
WO2022096963A1 (fr) * 2021-08-06 2022-05-12 Abdul Jabbar Abdulla Ali Gargash Collecteur d'énergie solaire

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331784A1 (de) * 1993-09-18 1995-03-23 Deutsche Forsch Luft Raumfahrt Rinnenkollektor
GB2282442A (en) * 1993-10-04 1995-04-05 Dyck Frans Seraphina Joseph Va Solar water heater
US20080053094A1 (en) * 2006-09-06 2008-03-06 Harris Corporation System for providing continuous electric power from solar energy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331784A1 (de) * 1993-09-18 1995-03-23 Deutsche Forsch Luft Raumfahrt Rinnenkollektor
GB2282442A (en) * 1993-10-04 1995-04-05 Dyck Frans Seraphina Joseph Va Solar water heater
US20080053094A1 (en) * 2006-09-06 2008-03-06 Harris Corporation System for providing continuous electric power from solar energy

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103090551A (zh) * 2011-10-31 2013-05-08 杭州三花研究院有限公司 一种太阳能接收器
CN103090551B (zh) * 2011-10-31 2016-08-24 杭州三花研究院有限公司 一种太阳能接收器
ITMI20120809A1 (it) * 2012-05-11 2013-11-12 Eni Spa Impianto termodinamico a concentrazione solare
WO2013168074A1 (fr) * 2012-05-11 2013-11-14 Eni S.P.A. Installation thermodynamique solaire à concentration
WO2015069201A1 (fr) * 2013-11-11 2015-05-14 Hse Hitit Solar Enerji Anonim Sirketi Tube de collecteur de chaleur
CN107606593A (zh) * 2017-08-11 2018-01-19 桂林电子科技大学 一种基于表面局域光热转换的蒸汽发生装置
WO2022096963A1 (fr) * 2021-08-06 2022-05-12 Abdul Jabbar Abdulla Ali Gargash Collecteur d'énergie solaire

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