JPS648257B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar energy collector for concentrating and storing solar energy.

Conventionally commonly used solar energy collectors irradiate the circulation pipe with sunlight through a smooth glass surface or condensing lens, heat the water in the circulation pipe, and accumulate sunlight energy. There is.

However, with a collector that uses only water circulation pipes, light energy in the long wavelength range of sunlight can be collected relatively efficiently, but light energy in the short wavelength range is not collected very efficiently, and there is a limited amount of heat. It has become a collector of efficiency.

In consideration of the above facts, the present invention aims to obtain a solar energy collector capable of collecting light energy in the entire wavelength range of sunlight.

The solar energy collector according to the present invention is provided with a water circulation pipe in the condensing part of the long wavelength light bent by the condensing and spectroscopy means, and a light absorption and heat dissipation main material circulation pipe in the condensing part of the short wavelength light, and the long wavelength light is In water, short-wavelength light is absorbed and heat-radiated by its main material, which collects the energy of each light.

Embodiments of the present invention will be described below with reference to the drawings.

In the solar energy collector 10 shown in FIG. 1, a fixed frame 12 is installed and fixed on the roof of a building 14 or the like.

A rotating frame 18 is pivotally supported on a vertical shaft 16 of the fixed frame 12, and is rotatable around the vertical shaft 16. A pair of arms erected from this rotating frame 18 are rotatably supported by a rotating frame 22 via a horizontal shaft 20, and are rotatable around the horizontal axis 22.

As shown in FIG. 2, the rotating frame 22 is a box with an open top end, and a Fresnel prism 24 made of synthetic resin such as acrylic, which serves as a light focusing and spectroscopy means, is fixed to the open top end of the box. . The outer surface of this Fresnel prism 24 is a smooth surface,
Three chevron-shaped protrusions are formed corresponding to the three sets of light condensing parts 26. In this way, Fresnel prism 24
Since the outer surface is smooth, cleaning work is easy when the outer surface becomes contaminated.

The inner surface of the Fresnel prism 24 is engraved with a plurality of irregularities to generate a Fresnel effect.
Although the lens 4 is thin, it has the same role as a large condenser lens. This Fresnel prism 24 acts as a condensing and spectroscopy means, and as shown in Figure 3, sunlight is refracted twice at the entrance and exit, and since the refractive index of sunlight differs depending on the wavelength of the light component, this is used. This enables efficient light collection.

That is, sunlight passes through a Fresnel prism and is refracted before being split into a spectrum, so the water circulation pipe 28 and the main circulation pipe 30, which are photoreceptors that match the wavelength range, are placed above the band-shaped part of this split spectrum. There is. In this embodiment, a main circulation pipe 30 that receives short wavelength light is located in the center of the light condensing section 26.
A pair of water circulation pipes 28 are arranged on both sides of this main material circulation pipe 30. As a result, the water circulation pipe 28 receives long-wavelength light that is not refracted to a relatively large extent by the Fresnel prism 24, and the main material circulation pipe 30 receives short-wavelength light that is refracted to a relatively large extent.

The water circulation pipe 28 is made of copper, and water as a heat medium flows therein. Furthermore, a glass tube 3 is concentrically arranged outside the water circulation pipe 28.
2 is arranged to create a vacuum between the water circulation pipe 28 and improve thermal efficiency.

One end of the water circulation pipe 28 is connected to a water supply source (not shown), and the other end is connected to the lower end of a hot water tank 38 via a pipe 34 and a pump 36, as shown in FIG. A hot water supply pipe 40 is connected to the upper end of the hot water storage tank 38 to feed hot water from the hot water storage tank 38 to a heater or the like.

As shown in FIG. 3, the main circulation pipe 30 is a flat transparent body with a large light-receiving surface facing toward the Fresnel prism 24 in order to efficiently absorb the short wavelength light refracted by the Fresnel prism 24. Inside, a light-absorbing and heat-radiating main material circulates.

In this embodiment, norbornadiene (hereinafter referred to as N-type) shown in FIG. 5 is used as the light-absorbing and heat-radiating main material. This N-isomer has fluidity at room temperature, and when irradiated with short-wavelength light in the ultraviolet region, it undergoes a photoreaction as shown in Figure 5 (hereinafter referred to as Q).
When this Q-form passes through a catalyst (such as a cobalt tetraphenyl polyphylline complex or a cobalt phthalocyanine complex), a catalytic thermal reaction occurs and it returns to the N-form. At this time, 22Kcal/Mol=240cal/g
Accompanied by some degree of heat generation. Therefore, it is possible to mainly accumulate short wavelength light of sunlight and release it as thermal energy as necessary.

Main material circulation pipe 3 where this light absorbing and heat dissipating main material circulates
As shown in FIG. 4, one end of the Q-body storage container 44 is connected to a Q-body storage container 44 via a pipe 42, and the Q-body storage container 44 is connected to a catalyst container 50 ( In this example a cobalt phthalocyanine complex is used). Therefore, the Q form sent through the pipe 46 changes into the N form within this catalyst container 50.

The catalyst container 50 is connected to an N-body storage container 54 through a pipe 52, and this N-body storage container 54 is connected to a pipe 52.
6 and a pump 58 to the other end of the main material circulation pipe 30.

In addition, as shown in FIG. 1, the rotating frame 18,
22 are respectively provided with drive devices 60 and 62, and the Fresnel prism 2 is rotated so that the rotating frame 22 always faces sunlight in response to a command from a sunlight sensor 64 or a storage device that stores the movement trajectory of sunlight in advance.
4 has come to receive sunlight efficiently.
Further, the specific irregularities of the Fresnel prism 24 can be shaped efficiently using a computer.

Next, the operation of this embodiment will be explained.

Since the rotating frame 22 constantly tracks the sun by driving the drive devices 60 and 62, the Fresnel prism 24 can be efficiently faced to the sunlight.

As shown in FIG. 3, sunlight is refracted at the entrance and exit of the Fresnel prism 24, and sunlight in the long wavelength range has a relatively small refractive index, so the main circulation pipe 3
The water circulation pipe 28 is irradiated through the glass tubes 32 provided on both sides of the water circulation pipe 28. As a result, the water in the water circulation pipe 28 is heated and sent to the hot water storage tank 38.

On the other hand, the light energy in the short wavelength range that causes relatively large refraction by the Fresnel prism 24 passes through the main material circulation pipe 30 provided approximately at the center of the condensing section 26 and irradiates the light-absorbing and heat-radiating main material inside. As a result, the main light-absorbing and heat-radiating material changes from N-body to Q-body, and this Q
The body is sent to the Q body storage container 44.

By driving the pump 48 as necessary, the Q body in the Q body storage container 44 is sent to the catalyst container 50 in the hot water storage tank 38 and returns to the N body, and generates heat to raise the temperature of the water in the hot water tank 38. raise.

The light-absorbing and heat-radiating main material that has returned to the Q-form in the catalyst container 50 is stored in the N-form storage container 54, and is sent to the main material circulation pipe 30 in the collector again by the operation of the pump 58 as needed.

In this embodiment, the long wavelength range of solar energy is collected by the water circulation pipe 28 and the short wavelength range is collected by the main material circulation pipe 30, so that the energy consumed in a relatively short period of time is collected from the water circulation pipe 28. In hot water supply, energy consumption after a long period of time (from several months to several years) can be obtained by subjecting the light-absorbing and heat-radiating main material from the main material circulation pipe 30 to a thermal reaction in the presence of a catalyst when necessary. It is possible to use it properly for long term and short term. In addition, a high temperature can be obtained by further heating the hot water obtained in the water circulation pipe 28 by a catalytic thermal reaction of the light-absorbing and heat-radiating main material, and the range of temperature selection is widened. In addition, in this embodiment, the water circulation pipe 28 and the main circulation pipe 30 are simply arranged in parallel, so manufacturing is extremely simple.If the main circulation pipe 30 is separated from the water circulation pipe 28, Material circulation pipe 3
The temperature of the light-absorbing and heat-radiating main material within 0 will not rise unnecessarily.

Although norbornadiene was used as the light-absorbing and heat-radiating main material in the above embodiment, the present invention can be applied to any fluid light-absorbing and heat-radiating material that can repeatedly absorb light energy and release thermal energy through a reversible isomerization reaction. Yes, other absorbing and heat dissipating base materials such as azepine can also be used. When this azepine receives short wavelength light, it changes into dichlorobutenodihydrovirol, and in the presence of a catalyst, the state changes back to azepine, accompanied by heat generation. In addition, in the present invention, the light-absorbing and heat-radiating main material can also be used in the form of a slurry.
Any state that has fluidity is applicable.

Further, although the above embodiment shows a structure in which the rotating frame 22 moves by tracking sunlight, it goes without saying that the present invention is also applicable to a fixed collector. Further, in the above embodiments, a Fresnel prism was used as the condensing and spectroscopy means, but any member having a condensing and spectroscopy function can be used, and a Fresnel prism may also be used.

As explained above, the solar energy collector according to the present invention is equipped with a water circulation pipe in the long wavelength light condensing section that is refracted by the condensing and spectroscopic means, and a light absorption and heat dissipation main material circulation pipe in the short wavelength light condensing section. It has the excellent effect of concentrating the long-wavelength light that has been collected in the same way as it is, and that it can also collect the short-wavelength light with a simple structure.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the solar energy collector according to the present invention, and FIG. 2 is a rotating frame 22.
3 is a partial sectional view of the revolving frame, FIG. 4 is a system diagram showing the hot water storage tank and surrounding piping, and FIG. 5 is a chemical reaction formula of the light-absorbing and heat-radiating main material used in this example. be. DESCRIPTION OF SYMBOLS 10...Solar energy collector, 24...Fresnel prism, 26...Light condensing part, 28...Water circulation pipe,
30...Main material circulation pipe.

Claims (1)

[Scope of Claims] 1. A light condensing spectrometer that transmits sunlight with a refractive index that differs depending on the wavelength; a water circulation pipe provided in a long wavelength light concentrating section of the condensing spectrometer; A solar energy collector comprising: a light absorbing and heat dissipating main material circulation pipe provided in a short wavelength light condensing section of the means. 2. The solar energy collector according to claim 1, wherein the light condensing and spectroscopy means is a Fresnel prism. 3. The solar energy collector according to claim 2, wherein the outer surface of the Fresnel prism is a smooth surface. 4. Any one of claims 1 to 3, wherein a plurality of the water circulation pipes are provided around the light-absorbing and heat-radiating main material circulation pipe.
Solar energy collectors as described in Section.