WO2016092580A2

WO2016092580A2 - Method for capturing thermal and specific radiative spectrum visible, and device for implementing said method

Info

Publication number: WO2016092580A2
Application number: PCT/IT2015/000300
Authority: WO
Inventors: Vito Lavanga; Stefano FARNE'
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-12-09
Filing date: 2015-12-09
Publication date: 2016-06-16
Anticipated expiration: 2017-06-09
Also published as: WO2016092580A3

Abstract

This invention relates to a method and to a device for the implementation of said method, for selectively picking up some frequencies of a radiative spectrum, for a first use and, at the same time, to use the residual frequencies for thermal purposes. The method is characterized in that it includes the following steps: • to pick up said electromagnetic radiation; • to induce the reflection of said one or more frequencies using a reflector coloured by colours corresponding to said one or more frequencies; • to receive said one or more frequencies reflected by said coloured reflector; • to convey said one or more received frequencies towards a user device; • to use said residual frequencies for increasing the temperature of said coloured reflector; • to take the thermal energy produced by said coloured reflector. The device (A) is characterized in that it includes: - first means (3), fitted to reflect said one or more frequencies and to absorb said residual frequencies, in such a way to produce thermal energy, said first means (3) being coloured by one or more colours corresponding to said frequencies to be reflected; • second means (5), fitted to receive said one or more frequencies reflected by said first means (3) and to transmit them to a user device.

Description

METHOD FOR CAPTURING THERMAL AND SPECIFIC RADIATIVE SPECTRUM VISIBLE, AND DEVICE FOR IMPLEMENTING SAID METHOD

DESCRIPTION

This invention refers to a method and to a device for the implementation of said method, for selectively picking up some frequencies of a radiation spectrum, for a first use and, at the same time, to use the residual frequencies for thermal purposes.

It is strongly felt the need to have effective systems for recovery of thermal energy, to feed heating systems and processes in general. This need is particularly felt in the low enthalpy systems, by the ever more widespread use of heat pumps, to exploit environmental resources (Renewable Energy Sources). The efficiency of thermal solar panels is compromised by the insulating structures used to draw from environmental resources, and are mainly aimed at picking up the portion of energy deriving from the only irradiation. Even for the not glazed panels, they were not developed specific strategies to exploit the natural dynamics of the convective motions that are generated to the heat taking in front of the vertical or anyhow inclined surfaces. Another need, strongly felt, is the possibility to have specific components of the visible spectrum, selected and in appropriate assortment for specific processes (for example for biological ones).

In summary, in the current state it is not possible to selectively pick up some frequencies of the radiation spectrum and, at the same time, to use the residual frequencies for thermal uses. Moreover, it is not optimized the taking of the environmental energy simultaneously with the one of the radiant energy.

In particular, it is not possible, by a single device, to pick up some specific frequencies for a purpose and to use the residual frequencies to produce thermal energy for another purpose.

The object of this invention is to propose a method and a device to implement said method, respectively conform to claims 1 and 2, to selectively pick up one or more frequencies of an electromagnetic radiation, at least in part visible and to use the residual frequencies to produce thermal energy. The method is characterized in that it includes the following steps:

• to pick up said electromagnetic radiation;

• to induce the reflection of said one or more frequencies using a reflector coloured by colours corresponding to said one or more frequencies;

• to receive said one or more frequencies reflected by said coloured reflector;

• to convey said one or more received frequencies towards a user device.

According to a preferred embodiment, the method is further characterized in that:

• to use the not reflected part of said electromagnetic radiation to increase the temperature of said coloured reflector;

· to take the thermal energy produced by said coloured reflector.

The device is characterized in that it includes:

• first means (3), fitted to reflect said one or more frequencies and to absorb said residual frequencies, in such a way to produce thermal energy, said first means (3) being coloured by one or more colours corresponding to said frequencies to be reflected;

• second means (5), fitted to receive said one or more frequencies reflected by said first means (3) and to transmit them to a user device. Other characteristics, such as for example the possibility to pick up the environmental energy, will be the subject of the dependent claims.

The use of a device according to the invention allows, for example, to pick up the frequencies that are useful for the growing of certain crops and, simultaneously, to heat the environment in which said crops are carried out.

The invention will now be described for illustrative and not limitative purpose, according to a preferred embodiment and with reference to the attached figure 1 , which shows the device according to the invention.

With reference to Fig. 1 , with (A) is indicated a device, according to the invention, able to pick up, for example: the frequencies concerning the colours red and blue and to use the residual frequencies to produce heat. Said device (A) includes:

• a first reflector (3), hit by the solar radiation, whose surface is painted in red and blue, so that it reflects only the wavelengths relevant to these two colours, said first reflector (3) being fitted to heat up due to the effect of the not reflected radiation;

• a second reflector (6), fastened on a rod (6a), which it is fastened itself on a support (7), said second reflector (6), capturing the light, red and blue, reflected by said first reflector (3);

• a receiver (5) fitted to receive the red and blue light reflected by said second reflector (6), said receiver (5) being connected with an optical fiber (5a) fitted to transmit towards a user device (not shown) said red and blue light;

· means (8, 9), placed in a heat exchange relationship with said first reflector (3) and fitted to pick up the heat produced by said first reflector (3) due to the effect of the absorbed radiation.

According to a preferred embodiment, said means fitted to pick up the heat produced by said first reflector (3), include a coil having an end (8) and (9) through which a thermal fluid flows.

The described device (A) uses a Cassegrain dynamic, that provides for the use of said second reflector (6) positioned in correspondence with the focus of said first reflector (3), which has the shape of a paraboloid. According to said Cassegrain dynamic, the second reflector (6) focuses the reflected rays on said receiver (5) located in correspondence with the vertex of the paraboloid which constitutes the first reflector (3). Alternatively, the reflector (5) can be positioned in correspondence of the focus of the paraboloid.

According to a preferred embodiment, shown in Fig. 1 , there are provided means fitted to pick up the environmental energy and to transfer it to said coil (8, 9). Said environmental energy can be, for example, the heat content of the air or of another medium such as, for example, of water taken from a source or of steam waste taken from a plant.

Said means fitted to pick up the environmental energy act by driving the laminar flows of fluids (gaseous or liquid) to lap the coil (8, 9). According to a preferred embodiment, said means include suitably oriented blades, for example, of stretched sheets (1 , 2), fitted to create specific convective motions.

Said means (1), (3), (8, 9) allow a significant energy exchange in their basic configuration, that will be increased when, slaved to heat pumps, being able to take advantage of larger gradients and therefore of greater energy volumes. Particular attitudes of the blades in stretched nets, in the state of energy taking from the environment (conveying towards the inside), involve the progressive cooling of the contiguous materials, that for a greater density will generate descendants convective laminar motions, favouring the inflow towards the means (1), (3) and (8, 9) designed to pick up the thermal energy. The fins of the stretchched sheet will have to assume a symmetrically reverse configuration in the event of the transfer of energy to the adjacent materials.

Said coil (8, 9) may be advantageously shaped so as to ensure a uniform exchange (roundtrip, according to a square, circular, elliptical or other spiral).

According to a further embodiment, the first reflector (3) and the coil (8, 9) comprise a single element of the type called roll bond, which is shaped according to the surface of a paraboloid, whose concave side act as the reflector (3).

Said means (1), (3), (8, 9), replaced by panels "roll-bond" make the device more economical, the novelty is in their coupling with the function of the first reflector (3) and subsequent means to capture and to convey one or more frequencies of a electromagnetic spectrum towards the user device. The "roll bond" are composed by a sandwich of two sheets of aluminum (metals or equivalent alloys) between which it derives a pipe run by heat transfer fluids (gas or liquids such as refrigerating gas or aqueous liquids). The invention finds applications in various sectors:

β algal crops, in which serves both the radiative spectrum and the thermal energy;

β (b) vegetable cultivations in greenhouse, to punctually convey specific radiative spectrum and thermal energy in other points more functional to the developments of the foliar and radical apparatuses;

e to convey only some frequencies useful to the effects of specific processes (e.g. photovoltaic ones) and in regimes concentrated with simultaneous recovery of residual frequencies to thermal purposes

(together with the thermal energy from the environmental condition); • vegetable crops in pits or cellars in schemes for hydroponic and aeroponic cultivation in urban structures;

⁹ (e) to allow the vegetation of meadows in natural grass sports centers or in general in tensile pressostatic structures.

The invention has been described for illustrative and not limitative purpose, according to some preferred embodiments. The person skilled in the art could find many other embodiments, all included within the scope of protection of the enclosed claims.

Claims

1. Method to selectively pick up one or more frequencies of an electromagnetic radiation, characterized in that it includes the following steps:

• to pick up said electromagnetic radiation;

• to convey said one or more received frequencies towards a user device.

2. Method to selectively pick up one or more frequencies of an electromagnetic radiation, according to claim 1 , characterized in that it further includes:

• the use of the not reflected part of said electromagnetic radiation to increase the temperature of said coloured reflector;

• the pick up of the thermal energy produced by said coloured reflector.

3. Device (A) fitted to selectively pick up one or more frequencies of an electromagnetic radiation, characterized in that it includes:

• the first means (3), fitted to reflect said one or more frequencies and to absorb said residual frequencies, so as to produce heat energy, said first means (3) being coloured with one or more colours corresponding to said frequencies to be reflected;

• second means (5), fitted to receive said one or more frequencies reflected by said first means (3) and to transmit them to a user device.

4. Device (A), according to claim 3, characterized in that said first means (3), fitted to reflect said one or more frequencies, include a surface shake in such a way fitted to focus the reflected rays of said one or more frequencies in a circular zone.

5. Device (A), according to claims 3 and 4, characterized in that said second means (5), fitted to receive said one or more frequencies reflected by said first means (3) and to transmit them to a user device, are positioned in correspondence of said circular or linear shaped area.

6. Device (A), according to claims 3 and 4, characterised in that it includes third means (6), fitted to receive said one or more frequencies reflected by said first means (3) and to reflect them on said second means (5), fitted to receive said one or more frequencies reflected by said first means (3) and to transmit them to said user.

7. Device (A), according to claim 6, characterized in that said first means (3), third means (6) and second means (5) are arranged according to a dynamic of Cassegrain.

8. Device (A), according to at least one of the claims from 3 to 7, characterized in that said second means (5), fitted to receive said one or more frequencies reflected by said first means (3) and to transmit them to said user, include an optic fitted to concentrate in an optical fiber (5a) the reflected rays of said one or more frequencies.

9. Device (A), according to at least one of the claims from 3 to 7, characterized in that said first means (3), fitted to reflect said one or more frequencies and to absorb said residual frequencies, so as to produce thermal energy, are in heat exchange relationship with a coil (8, 9) inside which a heat transfer fluid flows.

10. Device (A), according to at least one of the claims from 3 to 8, characterized in that it includes fourth means fitted to pick up the environmental energy and to transfer it to said coil (8, 9).

1 1. Device (A), according to claim 10, characterized in that said fourth means, fitted to pick up the environmental energy and to transfer it to said coil (8, 9), are fitted to direct the laminar flows of the concerned fluids (gaseous or liquid) so as to lap the said coil (8, 9).

12. Device (A), according to claim 11 , characterized in that said fourth means, fitted to direct the laminar flows of the concerned fluids (gaseous or liquid) so as to lap the said coil (8, 9), include some blades oriented in such a way as to create specific convective motions.

13. Device (A), according to claim 12, characterized in that said fourth means, fitted to direct the laminar flows of the concerned fluids (gaseous or liquid) so as to lap the said coil (8, 9) include said blades that are oriented in such a way as to create specific convective motions, include some stretched sheets (1 , 2).

14. Device (A), according to at least one of the claims from 3 to 13, characterized in that said first reflector (3) and said coil (8, 9) are integrated in a single element of the type called "roll-bond", said element roll-bond being shaped according to the surface of a paraboloid, whose concave side assumes the role of the said reflector (3).