WO2014068755A1 - Tuyau collecteur de chaleur de lumière solaire et collecteur de chaleur de lumière solaire utilisant celui-ci - Google Patents

Tuyau collecteur de chaleur de lumière solaire et collecteur de chaleur de lumière solaire utilisant celui-ci Download PDF

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Publication number
WO2014068755A1
WO2014068755A1 PCT/JP2012/078360 JP2012078360W WO2014068755A1 WO 2014068755 A1 WO2014068755 A1 WO 2014068755A1 JP 2012078360 W JP2012078360 W JP 2012078360W WO 2014068755 A1 WO2014068755 A1 WO 2014068755A1
Authority
WO
WIPO (PCT)
Prior art keywords
collecting tube
heat collecting
solar heat
solar
solar light
Prior art date
Application number
PCT/JP2012/078360
Other languages
English (en)
Japanese (ja)
Inventor
佐志　一道
貴彦 大重
西山　直樹
坂本　義仁
Original Assignee
Ｊｆｅスチール株式会社
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 Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to PCT/JP2012/078360 priority Critical patent/WO2014068755A1/fr
Publication of WO2014068755A1 publication Critical patent/WO2014068755A1/fr

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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
    • F24S70/00—Details of absorbing elements
    • F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
    • F24S70/225—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption for spectrally selective absorption
    • 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
    • F24S80/60—Thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • F24S70/60—Details of absorbing elements characterised by the structure or construction
    • F24S2070/62—Heat traps
    • 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

Definitions

  • the present invention relates to a solar heat collecting tube and a solar heat collector using the same.
  • a vacuum glass tube has been used as a solar heat collecting tube because it can suppress heat loss due to air convection (for example, see Patent Document 1).
  • Patent Document 1 the inside of the tube exposed to high temperatures must be kept in a vacuum for a long time, and there are problems such as fatigue of the glass material due to thermal expansion and contraction during the day and night, and reduction in heat collection efficiency due to reflection of the glass surface. It was.
  • an object of the present invention is to provide a solar heat collecting tube with high heat collection efficiency and a solar heat collector using the same.
  • the present inventor has shown that the use of a cylindrical heat collecting tube provided with a slit-like opening improves the heat collecting efficiency without using a vacuum glass tube.
  • the headline and the present invention were completed. That is, the present invention provides the following (1) to (6).
  • a solar heat collecting tube that collects sunlight and heats a heat medium
  • the shape of the solar heat collecting tube is a partially cut-out cylindrical shape having slit-like openings throughout the major axis direction
  • a solar heat collecting tube in which the ratio of the area of the inner wall surface to the area of the opening (opening / inner wall) is 2.5 to 30.0%.
  • the solar heat collecting tube according to the above (1) which has a selective absorption film that transmits visible light and near infrared rays of the sunlight and reflects far infrared rays radiated from the heat medium on the inner wall surface.
  • a solar collector having a solar collector tube and a condensing reflector The solar heat collecting tube is the solar heat collecting tube according to any one of the above (1) to (5), The solar collector which the said solar heat collecting tube is provided in the focus of the said condensing reflector.
  • a solar heat collecting tube with high heat collection efficiency and a solar heat collector using the same can be provided.
  • the solar heat collecting tube of the present invention can be formed using a metal base material such as stainless steel, heat-resistant steel, etc., it is superior in long-term reliability than a vacuum glass tube and is easy to manufacture, Very useful.
  • the solar heat collecting tube of the present invention is a solar heat collecting tube that collects sunlight and heats a heat medium, and the shape of the solar heat collecting tube has slit-like openings throughout the major axis.
  • the solar heat collecting tube has a partially cut-out cylindrical shape, and the ratio of the area of the inner wall surface to the area of the opening (opening / inner wall) is 2.5 to 30.0%.
  • the solar heat collecting tube 10 of the present invention is a heat collecting tube provided in the solar heat collector 1 of the present invention, condenses the sunlight reflected by the condensing reflector 2, and heats it. A heat collecting tube for heating the medium.
  • the shape of the solar heat collecting tube 10 of this invention is a cylinder shape provided with the slit-shaped opening part 11, and specifically, it shows to FIG. 2 (A). As shown in FIGS. 2 (B) and 2 (C), it may be a circular cylinder (including an ellipse).
  • the ratio of the area of the inner wall surface of the solar heat collecting tube to the area of the opening (opening / inner wall) is 2.5 to 30.0%.
  • the inner wall surface of the solar heat collecting tube refers to the light receiving surface of sunlight (reflected light)
  • the area refers to the area of the inner surface of the solar heat collecting tube not including the area of the opening.
  • the opening part of a solar heat collecting tube means the taking-in port of sunlight (reflected light)
  • the area is short of an opening part, for example, when the cross-sectional shape of a solar heat collecting tube is uniform. It is a value calculated from the product of the side and the long side (that is, the length of the solar heat collecting tube in the long axis direction).
  • the length of the shortest side is said.
  • the ratio is in the range of 2.5 to 30.0%, the heat collecting efficiency of the solar heat collecting tube is increased. This is because sunlight (reflected light) incident from the opening is confined in the cylindrical shape of the solar heat collecting tube and repeatedly reflected on the inner wall of the solar heat collecting tube as shown in FIG. it is conceivable that.
  • the ratio is preferably 5 to 25%, more preferably 10 to 20%, because the heat collection efficiency of the solar heat collecting tube becomes higher.
  • the base material of the solar heat collecting tube of the present invention is not particularly limited, and a heat-resistant metal base material such as an iron-based material (for example, stainless steel, heat-resistant steel, alloy steel, carbon steel, etc.) or an aluminum-based material is used. be able to. Among these, it is preferable to use stainless steel or heat-resistant steel in consideration of the use environment, for example, considering that the solar heat collecting tube is heated to about 500 ° C. and that a heat medium such as a molten salt can be used. .
  • the material of the stainless steel is not particularly limited, and examples thereof include a material containing 5 to 40% of Cr and 5% or less of Mo, and 5% of an arbitrary component such as Ti, Nb, and Cu.
  • the heat-resistant steel is not particularly limited, and examples thereof include materials containing Ni, Co, W, Mo, Nb, and other alloy elements in addition to several percent or more of Cr, and the structure thereof is martensitic or ferrite. , Austenite type and precipitation hardening type.
  • the solar heat collecting tube 10 of the present invention preferably has a selective absorption film 12 on the inner wall surface because the heat collecting efficiency of the solar heat collecting tube becomes higher.
  • the selective absorption film is a film that transmits visible light and near infrared rays of sunlight and reflects far infrared rays radiated from the heat medium.
  • the selective absorption film is, for example, a film that absorbs at a wavelength of 0.5 ⁇ m, which is an approximate intensity peak of sunlight (air mass 1), of 60% or more, preferably 80% or more, and black body radiation of 600K.
  • films having an absorption of 70% or less, preferably 50% or less (reflection is less than 50%) at a wavelength of 5 ⁇ m, which is an approximate intensity peak specifically, for example, black chrome plating film, black nickel plating A film, an electroless nickel blackening film, a triiron tetroxide film, or the like can be suitably used.
  • the solar heat collecting tube 10 of the present invention has a heat insulating layer 13 or a selective absorption film (not shown) similar to the above on the outer wall surface because the heat collecting efficiency of the solar heat collecting tube becomes higher.
  • the heat insulating layer for example, it is preferable to use an inorganic heat-resistant heat insulating material, and specifically, glass wool, slag wool, ceramic fiber, inorganic foaming material, or the like can be suitably used.
  • the thickness of the said heat insulation layer is not specifically limited, The thing to about 10 cm is applicable.
  • the solar collector of the present invention is a solar collector having the above-described solar collector tube of the present invention and a condensing reflector, and the solar collector tube is at the focal point of the concentrator reflector. It is a solar collector provided. Next, the structure of the solar heat collector of this invention is demonstrated using drawing.
  • the solar heat collector 1 of the present invention includes the above-described solar heat collecting tube 10 of the present invention and the condensing reflector 2.
  • the condensing reflection plate 2 is mounted on the support base 4 together with the tracking mechanism 3, and the solar heat collecting tube 10 is a support member so as to be positioned at the focal point (condensing portion) of the condensing reflection plate 2. 5 is supported and fixed to the condenser reflector 2.
  • the solar heat collecting tube 10 is preferably fixed so that the center of the opening 11 is the focal point (condenser) of the condensing reflector 2.
  • the surface of the condensing reflector 2 facing the solar heat collecting tube 10 is a curved trough-type mirror surface, and the sunlight incident on the condensing reflecting plate 2 is reflected to the solar heat collecting tube 10. Condensed.
  • the said condensing reflecting plate is rolled, it will not specifically limit, As a material, a steel plate, an aluminum plate, a plastic plate etc. are mentioned, for example.
  • the steel plate is not particularly limited as long as it is a normal steel plate. However, from the viewpoint of light resistance, weather resistance, and economy, a cold-rolled steel plate and a stainless steel plate are preferable, and a surface-treated steel plate and stainless steel are preferable because they have excellent corrosion resistance on the back surface. A steel plate is more preferable.
  • the thickness of the light collecting and reflecting plate is not particularly limited, but it is preferably thinner from the viewpoint of facilitating the bending process, specifically 0.5 mm or less, more preferably 0.15 mm or less.
  • the said condensing reflecting plate has a reflecting film on the surface.
  • the reflective film is preferably a metal-containing film, and as the metal, silver (Ag) and aluminum (Al) having high reflectivity are preferably used, and aluminum is preferable from an economical viewpoint. .
  • the said condensing reflecting plate has a protective film on the surface (The surface of the said reflecting film when it has the said reflecting film.).
  • the protective film is a transparent conventional well-known protective film for withstanding outdoor erosion.
  • the protective film is mainly composed of silicon oxide (SiO, SiO 2 ), and is mainly composed of aluminum oxide (Al 2 O 3 ). And a protective film.
  • a heat medium (for example, oil, molten salt, water, etc.) 14 flows in the solar collector tube 10.
  • the heat medium is circulated by a pump (not shown).
  • the solar heat collecting tube 10 is heated by the sunlight reflected by the said condensing reflector, the heat medium 14 which flows into the inside of the solar heat collecting tube 10 is also heated, and the heated heat medium 14 becomes a steam turbine. Power is generated by being sent to (not shown) to evaporate water and turning this steam turbine.
  • the heat medium 14 is not limited to a mode of flowing inside the solar heat collecting tube 10.
  • the heat medium pipe 15 provided near the inner wall of the solar heat collecting tube 10. It may be a mode that flows in the inside, and as shown in FIG. 4B, in a mode that flows in the heat medium pipe 15 provided between the inner wall and the outer wall of the solar heat collecting tube 10 (double wall structure). There may be.
  • a vacuum glass tube (manufactured by Terada Iron Works) is used as a solar heat collecting tube, and an aluminum metal film is formed by vacuum deposition on a curved stainless steel plate (SUS430, plate thickness: 0.1 mm, manufactured by JFE Steel) as a condensing reflector.
  • a solar collector using a trough-type substrate having a film formed thereon was fabricated.
  • a selective absorption film is provided on the inner wall surface for a hollow stainless steel having a ratio of openings (hereinafter referred to as “opening ratio”) shown in Table 1 below, and a heat insulating layer is formed on the outer wall surface.
  • opening ratio a ratio of openings
  • a solar heat collector was produced in the same manner as in the reference example except that. Specifically, first, stainless steel (SUS447J1, plate thickness: 3.0 mm) is curved using a U press, an O press, or the like to obtain a desired opening ratio, and is indicated by reference numeral 10a shown in FIG. A part to be manufactured was prepared.
  • stainless steel SUS447J1, plate thickness: 3.0 mm
  • a portion indicated by reference numeral 10b shown in FIG. 5 was produced.
  • Each of these portions was welded at a portion denoted by reference numeral 10c shown in FIG. 5 to produce a substantially cylindrical base material partially lacking.
  • black chromium plating was applied to the inner wall surface of the base material by electroplating to form a selective absorption film (film thickness: 1 ⁇ m).
  • ceramic foam was sprayed on the surface of the outer wall of the base material to form a heat insulating layer.
  • Example 12 A solar heat collector was produced in the same manner as in Example 7 except that heat-resistant steel (SUH660, plate thickness: 3.0 mm) was used instead of stainless steel.
  • heat-resistant steel SAH660, plate thickness: 3.0 mm

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  • 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)
  • Spectroscopy & Molecular Physics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'objet de la présente invention est de réaliser un tuyau collecteur de chaleur de lumière solaire ayant une efficacité élevée de recueil de chaleur, et un collecteur de chaleur de lumière solaire utilisant le tuyau collecteur de chaleur de lumière solaire. Ce tuyau collecteur de chaleur de lumière solaire qui chauffe un milieu thermique en recueillant la lumière solaire a une forme cylindrique partiellement découpée, qui a une ouverture de type fente dans la région entière dans la direction de l'axe long, et qui a un rapport (l'ouverture/paroi interne) de 2,5 à 30,0 % entre l'aire d'une surface de paroi interne et l'aire de l'ouverture.
PCT/JP2012/078360 2012-11-01 2012-11-01 Tuyau collecteur de chaleur de lumière solaire et collecteur de chaleur de lumière solaire utilisant celui-ci WO2014068755A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/078360 WO2014068755A1 (fr) 2012-11-01 2012-11-01 Tuyau collecteur de chaleur de lumière solaire et collecteur de chaleur de lumière solaire utilisant celui-ci

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/078360 WO2014068755A1 (fr) 2012-11-01 2012-11-01 Tuyau collecteur de chaleur de lumière solaire et collecteur de chaleur de lumière solaire utilisant celui-ci

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WO2014068755A1 true WO2014068755A1 (fr) 2014-05-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107713751A (zh) * 2017-12-08 2018-02-23 曾融 一种户外太阳能烧水壶
ES2844976A1 (es) * 2020-01-22 2021-07-23 Univ Malaga Receptor de doble cavidad para colectores solares de foco lineal
ES2844999A1 (es) * 2020-01-22 2021-07-23 Univ Malaga Colector solar de foco lineal con receptor abierto en forma de herradura
CN114357711A (zh) * 2021-12-03 2022-04-15 中广核太阳能开发有限公司 基于截断率计算的集热管弯曲处理方法和装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50139440A (fr) * 1974-04-24 1975-11-07
JPS5592842A (en) * 1978-12-28 1980-07-14 Sharp Corp Solar heat collector
JPS5697752A (en) * 1979-12-29 1981-08-06 Matsushita Electric Works Ltd Heat-collecting pipe for solar-heat water heater
JPS5795548A (en) * 1980-12-05 1982-06-14 Taiyo Sanso Kk Solar heat collector device
JPS57129348A (en) * 1981-02-02 1982-08-11 Taiyo Sanso Kk Solar heat collector
JPS5846056U (ja) * 1981-09-24 1983-03-28 株式会社富士電機総合研究所 太陽熱集熱器の集熱板
JPH10306946A (ja) * 1997-05-06 1998-11-17 Pado:Kk 太陽熱利用熱媒加熱装置
JP2008215740A (ja) * 2007-03-06 2008-09-18 Matsushita Electric Ind Co Ltd 集熱器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50139440A (fr) * 1974-04-24 1975-11-07
JPS5592842A (en) * 1978-12-28 1980-07-14 Sharp Corp Solar heat collector
JPS5697752A (en) * 1979-12-29 1981-08-06 Matsushita Electric Works Ltd Heat-collecting pipe for solar-heat water heater
JPS5795548A (en) * 1980-12-05 1982-06-14 Taiyo Sanso Kk Solar heat collector device
JPS57129348A (en) * 1981-02-02 1982-08-11 Taiyo Sanso Kk Solar heat collector
JPS5846056U (ja) * 1981-09-24 1983-03-28 株式会社富士電機総合研究所 太陽熱集熱器の集熱板
JPH10306946A (ja) * 1997-05-06 1998-11-17 Pado:Kk 太陽熱利用熱媒加熱装置
JP2008215740A (ja) * 2007-03-06 2008-09-18 Matsushita Electric Ind Co Ltd 集熱器

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107713751A (zh) * 2017-12-08 2018-02-23 曾融 一种户外太阳能烧水壶
CN107713751B (zh) * 2017-12-08 2023-08-15 江门市新会区沃浩进出口有限公司 一种户外太阳能烧水壶
ES2844976A1 (es) * 2020-01-22 2021-07-23 Univ Malaga Receptor de doble cavidad para colectores solares de foco lineal
ES2844999A1 (es) * 2020-01-22 2021-07-23 Univ Malaga Colector solar de foco lineal con receptor abierto en forma de herradura
WO2021148703A1 (fr) * 2020-01-22 2021-07-29 Universidad De Málaga Récepteur à double cavité pour collecteurs solaires à foyer linéaire
WO2021148701A1 (fr) * 2020-01-22 2021-07-29 Universidad De Málaga Collecteur solaire à foyer linéaire avec récepteur ouvert en forme de fer à cheval
CN114357711A (zh) * 2021-12-03 2022-04-15 中广核太阳能开发有限公司 基于截断率计算的集热管弯曲处理方法和装置

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