EP2745059A1 - Solar receiver tube assembly with suited receiver tube per working temperature and use of the receiver tube assembly - Google Patents

Solar receiver tube assembly with suited receiver tube per working temperature and use of the receiver tube assembly

Info

Publication number
EP2745059A1
EP2745059A1 EP12772932.5A EP12772932A EP2745059A1 EP 2745059 A1 EP2745059 A1 EP 2745059A1 EP 12772932 A EP12772932 A EP 12772932A EP 2745059 A1 EP2745059 A1 EP 2745059A1
Authority
EP
European Patent Office
Prior art keywords
receiver tube
tube assembly
solar
solar receiver
loop
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
EP12772932.5A
Other languages
German (de)
French (fr)
Inventor
Hagai Aran
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 Concentrated Solar Power Ltd
Original Assignee
Siemens Concentrated Solar Power Ltd
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 filed Critical Siemens Concentrated Solar Power Ltd
Priority to EP12772932.5A priority Critical patent/EP2745059A1/en
Publication of EP2745059A1 publication Critical patent/EP2745059A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
    • 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
    • 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

Definitions

  • This invention relates to a solar receiver tube assembly and a use of the receiver tube assembly.
  • a solar field comprises loops with receiver tubes for absorb ⁇ ing solar energy and transferring absorbed energy to a heat transfer fluid which is located in the receiver tubes.
  • One loop or more than one loop is a solar receiver tube assembly.
  • a receiver tube comprises a selective absorptive coating.
  • the selective coating set point is a tradeoff between maximum ab ⁇ sorption and minimal radiation. It is the nature of the se ⁇ lective coating that enlarging the absorption percentage (designated by a) will increase the radiation (designated by ⁇ ) . It is also in the nature of the selective coating that while the absorption is indifferent with the working tempera ⁇ ture, the emissivity is higher as the temperature is higher. In the current state of the art all the receivers along the loop have the same design.
  • a solar receiver tube assembly is provided with at least one first solar receiver tube with a first selective absorptive coating; at least one second solar receiver tube with a sec ⁇ ond selective absorptive coating, wherein values of at least one optical characteristic of the first selective coating and the second selective coating differs from each other while an operating the solar receiver tube assembly.
  • the optical char- acteristics are preferably a and ⁇ . The idea is to improve the effectiveness of the receiver tubes along the receiver assembly .
  • the advantage is by gaining more energy from the loop and the solar field as a whole especially at the area where the tem ⁇ perature is low and the threshold between absorption and sup ⁇ pression can be shifted to higher wave length and gain more energy. This will become more effective when working in higher temperature HTF for example molten salt or DSG.
  • the first receiver tube and the second receiver tube are components of a single loop of the solar receiver tube assembly.
  • different solar receiver tubes are used.
  • same kinds of receiver tubes with same selective absorptive coatings are used, whereas while the operating the complete system the values of the optical characteristics are different.
  • the first receiver tube is a component of a first loop of the solar receiver tube assem ⁇ bly and the second receiver tube is a component of a second loop of the solar receiver tube assembly and the first loop and the second loop are different from each other. There are at least two loops.
  • the solar receiver tube assembly is used in a power plant for converting solar energy into electrical energy.
  • FIG. 1 and figure 2 show partial views of different solar receiver tube assemblies. DETAILED DESCRIPTION OF THE INVENTION
  • More than one type of solar receiver tubes with different set point are installed on different locations along one single loop 100 of the solar receiver tube assembly 1 (figure 1) .
  • Values of at least one optical characteristic of the first selective coating and the second selective coating differ from each other while an operating the solar receiver tube assembly.
  • the set point for lower temperature associated with the beginning of the loop might have higher a and higher ⁇ and the receiver associated with the end of the loop and higher temperature will be design with lower ⁇ and lower a .
  • example 1 The result concerning example 1 is possible with different loops 200 and 300 for different temperature. For instance, this is suggested for direct steam generation (DSG) . In this case different loops will be equipped with different solar receiver tubes.
  • DSG direct steam generation

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)
  • Photovoltaic Devices (AREA)
  • Greenhouses (AREA)

Abstract

A solar receiver tube assembly (1) is provided with at least one first solar receiver tube (101) with a first selective absorptive coating; at least one second solar receiver tube (102) with a second selective absorptive coating, wherein values of at least one optical characteristic of the first selective coating and the second selective coating differs from each other while an operating the solar receiver tube assembly. The optical characteristics are preferably alpha and epsilon.

Description

Description
SOLAR RECEIVER TUBE ASSEMBLY WITH SUITED RECEIVER TUBE PER WORKING TEMPERATURE AND USE OF THE RECEIVER TUBE ASSEMBLY
BACKGROUND OF THE INVENTION
1. Field of the Invention This invention relates to a solar receiver tube assembly and a use of the receiver tube assembly.
2. Description of the Related Art A solar field comprises loops with receiver tubes for absorb¬ ing solar energy and transferring absorbed energy to a heat transfer fluid which is located in the receiver tubes. One loop or more than one loop is a solar receiver tube assembly. A receiver tube comprises a selective absorptive coating. The selective coating set point is a tradeoff between maximum ab¬ sorption and minimal radiation. It is the nature of the se¬ lective coating that enlarging the absorption percentage (designated by a) will increase the radiation (designated by ε) . It is also in the nature of the selective coating that while the absorption is indifferent with the working tempera¬ ture, the emissivity is higher as the temperature is higher. In the current state of the art all the receivers along the loop have the same design.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an optimized so¬ lar receiver tube assembly. A further object of the invention is a use of the solar re¬ ceiver tube assembly. These objects are achieved by the invention specified in the claims .
A solar receiver tube assembly is provided with at least one first solar receiver tube with a first selective absorptive coating; at least one second solar receiver tube with a sec¬ ond selective absorptive coating, wherein values of at least one optical characteristic of the first selective coating and the second selective coating differs from each other while an operating the solar receiver tube assembly. The optical char- acteristics are preferably a and ε . The idea is to improve the effectiveness of the receiver tubes along the receiver assembly .
The advantage is by gaining more energy from the loop and the solar field as a whole especially at the area where the tem¬ perature is low and the threshold between absorption and sup¬ pression can be shifted to higher wave length and gain more energy. This will become more effective when working in higher temperature HTF for example molten salt or DSG.
In a preferred embodiment the first receiver tube and the second receiver tube are components of a single loop of the solar receiver tube assembly. By this, within a loop different solar receiver tubes are used. Alternatively, same kinds of receiver tubes with same selective absorptive coatings are used, whereas while the operating the complete system the values of the optical characteristics are different. Concerning a different embodiment the first receiver tube is a component of a first loop of the solar receiver tube assem¬ bly and the second receiver tube is a component of a second loop of the solar receiver tube assembly and the first loop and the second loop are different from each other. There are at least two loops.
Finally the solar receiver tube assembly is used in a power plant for converting solar energy into electrical energy.
BIEF DESCRIPTION OF THE DRAWINGS
Further features and advantages of the invention are produced from the description of an exemplary embodiment with refer- ence to the drawings. The drawings are schematic.
Figure 1 and figure 2 show partial views of different solar receiver tube assemblies. DETAILED DESCRIPTION OF THE INVENTION
Example 1 :
More than one type of solar receiver tubes with different set point are installed on different locations along one single loop 100 of the solar receiver tube assembly 1 (figure 1) . There are at least one first solar receiver tube 101 with a first selective absorptive coating and at least one second solar receiver tube 102 with a second selective absorptive coating.
Values of at least one optical characteristic of the first selective coating and the second selective coating differ from each other while an operating the solar receiver tube assembly. The set point for lower temperature associated with the beginning of the loop might have higher a and higher ε and the receiver associated with the end of the loop and higher temperature will be design with lower ε and lower a .
Example 2 :
The result concerning example 1 is possible with different loops 200 and 300 for different temperature. For instance, this is suggested for direct steam generation (DSG) . In this case different loops will be equipped with different solar receiver tubes.
In view of the invention there are at least two possibilities to gain the different values of the optical characteristics:
- Using solar receiver tubes with different solar absorptive coatings . - Development of a special coating, using thermal sensitive layers, that is changing it's optical characteristic accord¬ ing it's temperature. In this case the entire loop or the en¬ tire field will be equipped with the same receiver tubes but the optic behaviour of the selective coatings will be effect by the temperature of the receiver tubes.

Claims

Patent claims
1. Solar receiver tube assembly (1) with
- at least one first solar receiver tube (101) with a first selective absorptive coating;
- at least one second solar receiver tube (102) with a second selective absorptive coating, wherein
- values of at least one optical characteristic of the first selective coating and the second selective coating differs from each other while an operating the solar receiver tube assembly ( 1 ) .
2. Solar receiver tube assembly according to claim 1, wherein the first receiver tube and the second receiver tube are com- ponents of a single loop (100) of the solar receiver tube as¬ sembly ( 1 ) .
3. Solar receiver tube assembly according to claim 1, wherein the first receiver tube is a component of a first loop (200) of the solar receiver tube assembly (1) and the second re¬ ceiver tube is a component of a second loop of the solar re¬ ceiver tube assembly (1) and the first loop (200) and the second loop (300) are different from each other.
4. Use of the solar receiver tube assembly (1) according to one of the claims 1 to 3 in a power plant for converting so¬ lar energy into electrical energy.
EP12772932.5A 2011-10-21 2012-10-12 Solar receiver tube assembly with suited receiver tube per working temperature and use of the receiver tube assembly Ceased EP2745059A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12772932.5A EP2745059A1 (en) 2011-10-21 2012-10-12 Solar receiver tube assembly with suited receiver tube per working temperature and use of the receiver tube assembly

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11186183 2011-10-21
EP12772932.5A EP2745059A1 (en) 2011-10-21 2012-10-12 Solar receiver tube assembly with suited receiver tube per working temperature and use of the receiver tube assembly
PCT/EP2012/070242 WO2013057043A1 (en) 2011-10-21 2012-10-12 Solar receiver tube assembly with suited receiver tube per working temperature and use of the receiver tube assembly

Publications (1)

Publication Number Publication Date
EP2745059A1 true EP2745059A1 (en) 2014-06-25

Family

ID=47022668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12772932.5A Ceased EP2745059A1 (en) 2011-10-21 2012-10-12 Solar receiver tube assembly with suited receiver tube per working temperature and use of the receiver tube assembly

Country Status (10)

Country Link
US (1) US20140360489A1 (en)
EP (1) EP2745059A1 (en)
JP (1) JP2014531012A (en)
CN (2) CN103062945A (en)
AU (1) AU2012325054B2 (en)
BR (1) BR112014009105A2 (en)
CL (1) CL2014000966A1 (en)
IL (1) IL231897A0 (en)
WO (1) WO2013057043A1 (en)
ZA (1) ZA201402168B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9692036B2 (en) 2012-08-29 2017-06-27 Gyrus Acmi, Inc. Destructive battery closure
JP5855797B2 (en) 2012-08-29 2016-02-09 ジャイラス・エーシーエムアイ・インコーポレーテッド Destructive battery closure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021895A (en) * 1973-06-18 1977-05-10 Commonwealth Scientific And Industrial Research Organization Solar heating

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4282857A (en) * 1980-03-06 1981-08-11 Owens-Illinois, Inc. Solar energy collector assembly
AU7442081A (en) * 1980-09-11 1982-03-18 Owens-Illinois Inc. Solar energy collector
AUPN364195A0 (en) * 1995-06-19 1995-07-13 University Of Sydney, The Solar selective surface coating
JP3830439B2 (en) * 2002-09-30 2006-10-04 京セラ株式会社 Solar heat collecting tube and water heater using the same
US20100326424A1 (en) * 2004-04-30 2010-12-30 The Regents Of The University Of California Residential solar thermal power plant
DE102004038233A1 (en) * 2004-08-05 2006-03-16 Schott Ag solar absorber
EP2217865A4 (en) * 2007-10-18 2014-03-05 Alliance Sustainable Energy High temperature solar selective coatings
BRPI0921123A2 (en) * 2008-11-05 2016-02-16 Siemens Concentrated Solar Power Ltd solar thermal power plant and dual purpose pipe for use with the same
US8333185B1 (en) * 2008-12-01 2012-12-18 S.P.U.D. Ltd. Solar fluid heater and applications for the same
CN101769648A (en) * 2008-12-30 2010-07-07 深圳市鹏桑普太阳能股份有限公司 Selective coating for absorbing solar light and heat
JP2010181045A (en) * 2009-02-03 2010-08-19 Mitaka Koki Co Ltd Light receiving pipe for solar light collecting device
JP5465952B2 (en) * 2009-08-26 2014-04-09 スタンレー電気株式会社 Solar heat collecting plate, manufacturing method thereof and solar power generation system
CN102713456B (en) * 2009-10-07 2015-05-27 阿海珐太阳能公司 Multi-tube solar thermal receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021895A (en) * 1973-06-18 1977-05-10 Commonwealth Scientific And Industrial Research Organization Solar heating

Also Published As

Publication number Publication date
JP2014531012A (en) 2014-11-20
AU2012325054A1 (en) 2014-04-03
IL231897A0 (en) 2014-05-28
AU2012325054B2 (en) 2016-12-08
CN203310150U (en) 2013-11-27
CL2014000966A1 (en) 2014-06-20
WO2013057043A1 (en) 2013-04-25
CN103062945A (en) 2013-04-24
BR112014009105A2 (en) 2017-04-18
US20140360489A1 (en) 2014-12-11
ZA201402168B (en) 2014-11-26

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