GB2231080A - Thermally efficient roof - Google Patents

Thermally efficient roof Download PDF

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Publication number
GB2231080A
GB2231080A GB8904836A GB8904836A GB2231080A GB 2231080 A GB2231080 A GB 2231080A GB 8904836 A GB8904836 A GB 8904836A GB 8904836 A GB8904836 A GB 8904836A GB 2231080 A GB2231080 A GB 2231080A
Authority
GB
United Kingdom
Prior art keywords
roof
building
reflective
double sided
panels
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.)
Withdrawn
Application number
GB8904836A
Other versions
GB8904836D0 (en
Inventor
John Barrie Timmons
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB8904836A priority Critical patent/GB2231080A/en
Publication of GB8904836D0 publication Critical patent/GB8904836D0/en
Publication of GB2231080A publication Critical patent/GB2231080A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14—Greenhouses
    • A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E04B7/12—Roofs; Roof construction with regard to insulation formed in bays, e.g. sawtooth roofs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/24—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like
    • E04D3/28—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of glass or other translucent material
    • 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
    • F24S20/60—Solar heat collectors integrated in fixed constructions, e.g. in buildings
    • F24S20/67—Solar heat collectors integrated in fixed constructions, e.g. in buildings in the form of roof constructions
    • 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
    • F24S23/77—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with flat reflective plates
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Energy (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Development (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Electromagnetism (AREA)
  • Materials Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Abstract

The roof of a building or greenhouse has a sawtooth configuration and double sided reflective panels to direct sunlight 2 through the transparent portion 4 and down into the building. The reflective panels can be moveable to close over the transparent portion 4 of the roof for nighttime use. The double sided reflective panels can be of glass quilt having aluminium foil overlaid with glass on both sides. <IMAGE>

Description

TIIERMAI,LY EFFlC [ ENT ROOF This invention relates to a thermally efficiellt roof of a greenhouse or building.
Converltiollal building and greenhouse roofs present an inefficient way of trapping direct solar energy. Single glazing, Thck of orientation, and roof angles to suit the construction rather than the latitude are common method; however, using orientated reflective panels in the roof construction, not only can the ability to trap direct sunlight be improved, but the ability to retain this and any supplimentary heat be increased. The panels are reflective on both sides and the therma efficiency can be increased by inserting insulation between these reflective surfaces.
The thermal efficiency of the roof can be further increased by using moveable reflective panels which close over the transparent south facing portion during the night when outside temperatures are the lowest.
Because in this condition the entire roof is highly reflective any supplimentary light and heat is effectively contained.
A specific embediment of the invention will now be described by way of example, with. referance to the accompanying drawings in which : Figure 1 is a section of the roof looking west to east and shows sunlight being collected with shutters in the day time position; Figure 2 shows a section of the roof (looking east to west) with shutters in the nightime position; Figure 3 shows in section one example of how the double sided reflective panels can be constructed.
Referring to Llle drawings, tlie roof is of Llie "sawtooLh" design in which the transparent portion 4 faces a southerly direction and the reflective portion 3, northerly. In the soulllern hemisl)llere tiie directions would be reversed. The angles at which tlle roof sections are built are determined by the latitude of the building. in tlle UriLish Isles tlie panels 3 angLed at 30 to the horizontel would trap all sunlight upto the maximum of 60' that the sun rises to on midsummers day.
Figure 1 shows the roof trapping sunlight 2 at this maximum angle of 6r) The sunlight either strikes the transparent portion 4 direct or strikes the panels 3, is reflected off and then enters through the transparent portion. This light then strikes the underside of the panel 3 and is reflected in a downward direction inside the building.
Figure 2A shows the roof with the moveable reflective shutters 5 in the daytime position. Figure 2B shows the nightime situation with the shutters over the transparent portion, increasing the thermal efficiency making Lhe entire roof reflective, and maximising the effect of any supplimentary heat and light used in the building.
Figure 3 shows how the panel 3 can be constructed where 1 is the insulation material (glass quilt for example) sandwiched between the reflective surfaces 12 ( aluminium foil for example). The insulation and reflective material is in turn sandwiched between sheets of transparent material 8 (glass for example) for support and protection. The reflective surfaces reduce heat loss by radiation and the insulation reduces heat loss by conduction making the panels highly efficient at retaining heat and light.

Claims (5)

1 A building or greenhouse roof using reflective double sided panels in a multiple sawtooth configuration as a method of directing solar energy into said building.
2 A building or greenhouse roof using reflective double sided panels in a multiple sawtooth configuration which are moveable in such a way as to cover the transparent/translucent porti#on of the roof during the night or adverse weather conditions.
3 A panel, highly reflective on both sides, as a method of directing and containing solar energy.
4 A panel as in claim 3 with thermal insulation between the reflective surfaces.
5 A building or greenhouse roof substantially as described herein with reference to Figures 1 - 3 of the accompanying drawing.
GB8904836A 1989-03-03 1989-03-03 Thermally efficient roof Withdrawn GB2231080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8904836A GB2231080A (en) 1989-03-03 1989-03-03 Thermally efficient roof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8904836A GB2231080A (en) 1989-03-03 1989-03-03 Thermally efficient roof

Publications (2)

Publication Number Publication Date
GB8904836D0 GB8904836D0 (en) 1989-04-12
GB2231080A true GB2231080A (en) 1990-11-07

Family

ID=10652637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8904836A Withdrawn GB2231080A (en) 1989-03-03 1989-03-03 Thermally efficient roof

Country Status (1)

Country Link
GB (1) GB2231080A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677691A1 (en) * 1991-06-14 1992-12-18 Cipriano Villoslada Martin Improvements to the metal frameworks of roof coverings for buildings
US5261184A (en) * 1991-06-12 1993-11-16 Minnesota Mining And Manufacturing Company Greenhouse construction and improved method of growing plants
CN106034826A (en) * 2016-06-13 2016-10-26 西北农林科技大学 Sunlight green house with self-reflection sliding back slope roof board

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1148677A (en) * 1965-07-16 1969-04-16 Talium A G Apparatus for controlling the distribution of incident light into a room

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1148677A (en) * 1965-07-16 1969-04-16 Talium A G Apparatus for controlling the distribution of incident light into a room

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261184A (en) * 1991-06-12 1993-11-16 Minnesota Mining And Manufacturing Company Greenhouse construction and improved method of growing plants
FR2677691A1 (en) * 1991-06-14 1992-12-18 Cipriano Villoslada Martin Improvements to the metal frameworks of roof coverings for buildings
CN106034826A (en) * 2016-06-13 2016-10-26 西北农林科技大学 Sunlight green house with self-reflection sliding back slope roof board

Also Published As

Publication number Publication date
GB8904836D0 (en) 1989-04-12

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)