WO2008087676A1 - A hyperbolical concentration sun mirror device - Google Patents

A hyperbolical concentration sun mirror device

Info

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
Grant status
Application
Patent type
Prior art keywords
sun
according
device
mirror
absorber
Prior art date
Application number
PCT/IT2007/000200
Other languages
French (fr)
Inventor
Adolfo Altieri
Pascale Fabrizio De
Francesco Giammatteo
Maurizio Macori
Original Assignee
Adolfo Altieri
Pascale Fabrizio De
Francesco Giammatteo
Maurizio Macori
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

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B19/00Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00Central heating systems using heat accumulated in storage masses
    • F24D11/002Central heating systems using heat accumulated in storage masses water heating system
    • F24D11/003Central heating systems using heat accumulated in storage masses water heating system combined with solar energy
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B19/00Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0019Condensers, 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)
    • G02B19/0023Condensers, 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B19/00Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0038Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light
    • G02B19/0042Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light for use with direct solar radiation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/83Other shapes
    • F24S2023/836Other shapes spiral
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/83Other shapes
    • F24S2023/837Other shapes hyperbolic
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/20Solar thermal
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy

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.
PCT/IT2007/000200 2007-01-17 2007-03-20 A hyperbolical concentration sun mirror device WO2008087676A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITRM20070020 2007-01-17
ITRM2007A000020 2007-01-17

Publications (1)

Publication Number Publication Date
WO2008087676A1 true 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 (1)

Country Link
WO (1) WO2008087676A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150128929A1 (en) * 2013-11-14 2015-05-14 Eduardo Saucedo Spiral Concentrating Collector with Moving Receiver

Citations (4)

* Cited by examiner, † Cited by third party
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 Solar collector panel mounted on roof or outside wall - has horizontal reflector and associated energy absorbing element screened from direct radiation

Patent Citations (4)

* Cited by examiner, † Cited by third party
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 Solar collector panel mounted on roof or outside wall - has horizontal reflector and associated energy absorbing element screened from direct radiation

Cited By (2)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
US4003366A (en) Solar heat collector module
US4194949A (en) Solar distillation apparatus
US4043315A (en) Solar heat collector
US7340899B1 (en) Solar power generation system
Qu et al. A solar thermal cooling and heating system for a building: Experimental and model based performance analysis and design
US6895145B2 (en) Apparatus and method for collecting light
US4238246A (en) Solar energy system with composite concentrating lenses
Kalogirou Parabolic trough collector system for low temperature steam generation: design and performance characteristics
US4505260A (en) Radiant energy device
US4059094A (en) Solar energy collector apparatus
Abdel-Rehim et al. Experimental and theoretical study of a solar desalination system located in Cairo, Egypt
US4296737A (en) Parabolic trough concentrating solar collector
US20090217921A1 (en) Method and control system for operating a solar power tower system
Zhai et al. Experimental investigation and analysis on a concentrating solar collector using linear Fresnel lens
US20080164135A1 (en) Solar Desalination Apparatus
US20090065045A1 (en) Solar electricity generation system
US20100191378A1 (en) Distributed power towers with differentiated functionalities
US3915148A (en) Thermostatically controlled non-tracking type solar energy concentrator
US4156420A (en) Solar heat collector
US4326502A (en) Solar energy collecting system
Struckmann Analysis of a flat-plate solar collector
US20060016448A1 (en) Apparatus and method for collecting energy
Romero et al. Concentrating solar thermal power
US4341204A (en) Solar energy collector
US20090314280A1 (en) Apparatus and A Method for Solar Tracking and Concentration af Incident Solar Radiation for Power Generation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07736704

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase in:

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07736704

Country of ref document: EP

Kind code of ref document: A1