WO2008087676A1 - A hyperbolical concentration sun mirror device - Google Patents
A hyperbolical concentration sun mirror device Download PDFInfo
- Publication number
- WO2008087676A1 WO2008087676A1 PCT/IT2007/000200 IT2007000200W WO2008087676A1 WO 2008087676 A1 WO2008087676 A1 WO 2008087676A1 IT 2007000200 W IT2007000200 W IT 2007000200W WO 2008087676 A1 WO2008087676 A1 WO 2008087676A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sun
- absorber
- fluid
- hyperbolic
- reservoir
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with solar energy
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0019—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors)
- G02B19/0023—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors) at least one surface having optical power
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0038—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light
- G02B19/0042—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light for use with direct solar radiation
-
- 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
- F24S2023/83—Other shapes
- F24S2023/836—Other shapes spiral
-
- 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
- F24S2023/83—Other shapes
- F24S2023/837—Other shapes hyperbolic
-
- 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
Definitions
- the present invention concerns a new hyperbolical concentration sun mirror device.
- Curves and spirals are known, more complex than the parabolic ones, in particular logarithmic curves based on the Fibonacci sequence, and hyperbolic curves.
- a plane sun mirror according to said spiral allows to intercept, without pursuit, the sun radiation at whatever height the sun may be, and to concentrate it onto the end part of said spiral so as to reduce dispersion to a minimum, and heat up - at any hour of the day - a linear absorber placed in the focus thereof.
- Figure 1 shows an axonometric view of a hyperbolic concentration sun mirror device, according to the present invention.
- Figure 2 shows a lateral scheme of the functioning of the device according to the present invention.
- Figure 3 shows the scheme of a possible primary circuit.
- sun rays R, incident onto plane plate 1, are reflected - according to the first Snell Rule - at an angle equal to the incident angle and concentrated onto an absorber 2 placed in the focus F of the hyperbolic structure, in which a heat- leading fluid will be thus heated.
- the device according to the present invention is realized with a mirror plate calendered according to the hyperbolic ' curve and stiffened by reinforcing structures 3 at its edges.
- a fluid flows for accumulating the thermic energy concentrated on said absorber 2, from sun mirror 1, while said circuit comprises: a reservoir 4 for the accumulation of said fluid; a pump 5 for the circulation of said fluid, controlled by a thermic probe 6 place on said reservoir 4, in turn being connected to a consensus thermic probe 7, place at the outlet of said absorber 2; a safety thermostat 8 place on said absorber 2, determining the operating of a means for blocking the radiation of said absorber in case of damage or bad working; a hydropneumatic accumulator 9, placed on said accumulation reservoir 4, for maintaining the pressure of the fluid, balancing possible volumetric variations caused by temperature variations; a secondary circuit, connected to said reservoir 4, for a plurality of devices for the exploitation of the accumulated thermic energy.
- Possible applications of the hyperbolic concentration sun mirror device according to the present invention allow: the production of sanitary warm water; the production of warm water for heating systems; the production of electric energy; the realization of solar cooling systems; the realization of desalinization systems; the realization of saunas etc.
Abstract
The hyperbolic concentration sun mirror device (1) according to the present invention, allows to intercept, without pursuit, the sun radiation at whatever height the sun may be, and to concentrate it onto the end part of said spiral so as to reduce dispersion to a minimum, and heat up - at any hour of the day - a linear absorber (2) placed in the focus (F) thereof.
Description
A HYPERBOLICAL CONCENTRATION SUN MIRROR DEVICE
The present invention concerns a new hyperbolical concentration sun mirror device.
At present, many devices are known making use of solar energy for high temperature heat, like tower systems with a central receiver and linear or punctual parabolic concentration systems.
The main negativity and the relative limit of above mentioned devices concerns the need of pursuing the sun by using parabolic mirrors rotating around an axis.
It is the aim of the present invention to avoid all structural complications bound to pursuing' sun radiation, together with a relative rationalizing of the systems.
Curves and spirals are known, more complex than the parabolic ones, in particular logarithmic curves based on the Fibonacci sequence, and hyperbolic curves.
The aim set forth is reached by means of a plane mirror device with a hyperbolic spiral or reciprocal spiral section, which is a transcendent curve, inverse to the Archimedes spiral, and whose polar coordinates expression is
rθ = a wherein "a" is a positive number.
By applying the following transformation to the formula in polar coordinates: x = r cos θ y = r sin θ, the parametric representation in Cartesian coordinates is obtained: x = a cos t/t y = a sin t/t, wherein "t" is the equivalent to the polar coordinates θ.
The spiral has an asymptote y = a; for t tending to 0, the ordinate tends to a, while the abscissa tends to infinity.
The realization of a plane sun mirror according to said spiral allows to intercept, without pursuit, the sun radiation at whatever height the sun may be, and to concentrate it onto the end part of said spiral so as to reduce dispersion to a minimum, and heat up - at any hour of the day - a linear absorber placed in the focus thereof.
The advantages of the device according to the present invention are evident.
The present invention will be described more in detail hereinbelow relating to the enclosed drawings in which an embodiment is shown.
Figure 1 shows an axonometric view of a hyperbolic concentration sun mirror device, according to the present invention.
Figure 2 shows a lateral scheme of the functioning of the device according to the present invention.
Figure 3 shows the scheme of a possible primary circuit.
According to the present invention sun rays R, incident onto plane plate 1, are reflected - according to the first Snell Rule - at an angle equal to the incident angle and concentrated onto an absorber 2 placed in the focus F of the hyperbolic structure, in which a heat- leading fluid will be thus heated.
According to a possible exemplification, the device according to the present invention is realized with a mirror plate calendered according to the hyperbolic' curve and stiffened by reinforcing structures 3 at its edges.
It is evident that in each practical realization, the inclination is calculated according to the height of the sun at the installation latitude, and to the optical "run" of the incident rays at the different sun hours is shown in figure 2.
Inside the circuit according to figure 3 a fluid flows for accumulating the thermic energy concentrated on said absorber 2, from sun mirror 1, while said circuit comprises: a reservoir 4 for the accumulation of said fluid;
a pump 5 for the circulation of said fluid, controlled by a thermic probe 6 place on said reservoir 4, in turn being connected to a consensus thermic probe 7, place at the outlet of said absorber 2; a safety thermostat 8 place on said absorber 2, determining the operating of a means for blocking the radiation of said absorber in case of damage or bad working; a hydropneumatic accumulator 9, placed on said accumulation reservoir 4, for maintaining the pressure of the fluid, balancing possible volumetric variations caused by temperature variations; a secondary circuit, connected to said reservoir 4, for a plurality of devices for the exploitation of the accumulated thermic energy.
Possible applications of the hyperbolic concentration sun mirror device according to the present invention allow: the production of sanitary warm water; the production of warm water for heating systems; the production of electric energy; the realization of solar cooling systems; the realization of desalinization systems; the realization of saunas etc.
Claims
1. A hyperbolic concentration sun mirror device for intercepting the sun radiation without pursuing it, at whatever height of the sun, and for concentrate it onto the end part of the spiral so as to reduce dispersion to a minimum, characterized in a plane mirror plate (1) with a hyperbolic spiral or reciprocal spiral section, on which incident sun rays (R) are reflected - according to the first Snell Rule - at an angle equal to the incident angle and concentrated onto an absorber (2) placed in the focus (F) of the hyperbolic structure, in which a heat-leading fluid will be thus heated.
2. A device according to claim 1, characterized in a mirror plate calendered according to the hyperbolic curve and stiffened by reinforcement structures (3) at the edges thereof.
3. A device according to claim 1, characterized in a realization inclination calculated according to the height of the sun at the installation latitude.
4. A device according to claim 1, comprising a circuit for the flow of said fluid for the accumulation of the thermic energy concentrated onto said absorber (2) from said sun mirror (1), characterized in: a reservoir (4) for the accumulation of said fluid; a pump (5) for the circulation of said fluid, controlled by a thermic probe (6) place on said reservoir (4), in turn being connected to a consensus thermic probe (7), place at the outlet of said absorber (2); a safety thermostat (8) place on said absorber (2), determining the operating of a means for blocking the radiation of said absorber in case of damage or bad working; a hydropneumatic accumulator (9), placed on said accumulation reservoir (4), for maintaining the pressure of the fluid, balancing possible volumetric variations caused by temperature variations; a secondary circuit, connected to said reservoir (4), for a plurality of devices for the exploitation of the accumulated thermic energy.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRM2007A000020 | 2007-01-17 | ||
IT000020A ITRM20070020A1 (en) | 2007-01-17 | 2007-01-17 | SOLAR MIRROR DEVICE WITH HYPERBOLIC CONCENTRATION |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008087676A1 true WO2008087676A1 (en) | 2008-07-24 |
Family
ID=38456511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT2007/000200 WO2008087676A1 (en) | 2007-01-17 | 2007-03-20 | A hyperbolical concentration sun mirror device |
Country Status (2)
Country | Link |
---|---|
IT (1) | ITRM20070020A1 (en) |
WO (1) | WO2008087676A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150128929A1 (en) * | 2013-11-14 | 2015-05-14 | Eduardo Saucedo | Spiral Concentrating Collector with Moving Receiver |
CN106382665A (en) * | 2016-08-31 | 2017-02-08 | 北京建筑大学 | Circulation heating device and flowing path control method for heat collecting liquid |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3974824A (en) * | 1974-08-09 | 1976-08-17 | Solergy, Inc. | Solar heating device |
GB1508950A (en) * | 1976-12-16 | 1978-04-26 | Lightfoot D | Solar heat collector module |
US4287880A (en) * | 1979-11-13 | 1981-09-08 | Geppert John M | Solar collector |
DE3036310A1 (en) * | 1980-09-26 | 1982-04-15 | Poly-Verbund Element Gmbh, 6120 Erbach | Solar collector panel mounted on roof or outside wall - has horizontal reflector and associated energy absorbing element screened from direct radiation |
-
2007
- 2007-01-17 IT IT000020A patent/ITRM20070020A1/en unknown
- 2007-03-20 WO PCT/IT2007/000200 patent/WO2008087676A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3974824A (en) * | 1974-08-09 | 1976-08-17 | Solergy, Inc. | Solar heating device |
GB1508950A (en) * | 1976-12-16 | 1978-04-26 | Lightfoot D | Solar heat collector module |
US4287880A (en) * | 1979-11-13 | 1981-09-08 | Geppert John M | Solar collector |
DE3036310A1 (en) * | 1980-09-26 | 1982-04-15 | Poly-Verbund Element Gmbh, 6120 Erbach | Solar collector panel mounted on roof or outside wall - has horizontal reflector and associated energy absorbing element screened from direct radiation |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150128929A1 (en) * | 2013-11-14 | 2015-05-14 | Eduardo Saucedo | Spiral Concentrating Collector with Moving Receiver |
US9383122B2 (en) * | 2013-11-14 | 2016-07-05 | Eduardo Saucedo | Spiral concentrating collector with moving receiver |
CN106382665A (en) * | 2016-08-31 | 2017-02-08 | 北京建筑大学 | Circulation heating device and flowing path control method for heat collecting liquid |
Also Published As
Publication number | Publication date |
---|---|
ITRM20070020A1 (en) | 2008-07-18 |
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