JPH0718598B2 - Method and device for collecting solar energy by using fluorescent type light collector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a solar energy concentrating heat collecting method and a device using a fluorescent type light collector.

BACKGROUND OF THE INVENTION There is a solar heat collector (collector) as a technique for converting solar energy into heat energy, and recently, techniques for improving the heat conversion efficiency of solar energy have been actively developed. The technology that can obtain the above has hardly been developed, and it is the current situation that it has not yet reached a satisfactory stage.

As is well known, there are various types of solar heat collectors, and not only the manufacturing cost, the shape, the appearance, etc. are different, but the heat conversion efficiency is also different. Is getting the most attention.

As a technology for comprehensive utilization of solar energy, Japanese Patent Laid-Open No. 59-477
The solar energy conversion device shown in No. 77 is known. This technology can obtain thermal energy and electrical energy, but not hot water. In addition, Japanese Utility Model Publication Nos. 53-36672, 43-21759, and U.S. Pat.
It is not possible to obtain a high-temperature heat medium (water pipe) even with the flat plate collector described in No.

[Object of the Invention] The present invention provides a method and device for concentrating and collecting solar energy using a fluorescent heat collecting plate, which can convert solar energy into heat energy comprehensively and efficiently to obtain a high-temperature heat medium. The purpose is to provide.

[Structure of the Invention] The present inventor has conducted earnest research to achieve the above object, and has completed the present invention.

A solar energy collecting and collecting method using a fluorescent type light collecting plate according to the present invention includes a first heat collector disposed at one end of the fluorescent type light collecting plate and a solar light incident surface of the fluorescent type light collecting plate. The second heat collector, which is a flat plate type solar heat collector composed of a heat collecting pipe with a selective absorption surface and a heat collecting plate with a selective absorption surface, is arranged at the opposite position, and a second heat medium is collected between both heat collectors. The heat medium passing from the heat collector side to the first heat collector side is connected, and the heat medium passing through the second heat collector is heated by using the sunlight rays passing through the fluorescent light collector as a heat source, and then, The heated heat medium is guided to the first heat collector through the heat medium passage to heat the sunlight rays captured by the fluorescent dye of the fluorescent light collector as a heat source. The heater is a vacuum glass tube type solar heat collector having a heat medium passage, and the present invention A solar energy collecting and collecting device using the fluorescent type light collecting plate is a fluorescent type light collecting plate, a first heat collector arranged at one end of the fluorescent type light collecting plate, and a sunlight incident surface of the fluorescent light collecting plate. And a second heat collector arranged at a position opposite to each other, wherein the first heat collector converts fluorescence and reflected light emitted by the fluorescent dye of the fluorescent type light collector into heat energy, The second heat collector is for converting sunlight rays that have passed through the fluorescent light collector into heat energy, and is a flat plate type including a heat collecting pipe with a selective absorption surface and a heat collecting plate with a selective absorption surface. It is a solar heat collector, and is connected to both heat collectors through a heat medium passage in which a heat medium flows from the second heat collector side to the first heat collector side. The heated heat medium is sent to the first heat collector and further heated, in the above, the first heat collector is It is a vacuum glass tube type solar collector with a medium passage, respectively, characterized.

[Operation of the Invention] According to the present invention, the first heat collector is arranged at the side end of the fluorescent light collector, and the heat collecting pipe with the selective absorption surface is selected at the position opposite to the sunlight incident surface of the fluorescent light collector. A second heat collector, which is a flat-plate solar heat collector composed of a heat collecting plate with an absorption surface, is arranged, a heat medium passage is connected between both heat collectors, and the heat medium flows from the second heat collector to the first heat collector. Since it is configured to flow to the heat collector side, first, the second ray is generated by the sunlight rays passing through the fluorescent type light collector.
The heat medium of the heat collector is heated, and at this time, unlike the case of the conventional flat plate collector of the upper and lower two-stage type, light is reflected upward from the lower collector and the fluorescent collector of the upper It is not necessary to return the light to the light plate, the heat medium thus heated by the second heat collector is sent to the first heat collector, and the fluorescence emitted from the fluorescent dye of the fluorescence type light collector is emitted. Will result in further heating.

Luminescent Solar used in the present invention
Concentrator) is a transparent glass or plastic sheet with a fluorescent dye added, and when it is exposed to sunlight, it absorbs light in a certain wavelength band in addition to reflected light, and emits light in different wavelength bands. Is emitted (the wavelength band of the light to be absorbed / emitted differs depending on the fluorescent dye).

Examples of fluorescent dyes include synthetic resin solid solutions of daylight fluorescent dyes and pigment dyes. As the fluorescent dye, for example, CI49005, CI46040, CI45170, CI45350, C.
I.45380 and the like, and examples of the resin include polymethacrylic acid ester resin, urea formalin resin, melamine resin, vinyl chloride, vinyl chloride vinyl chloride copolymer, alkyd resin and modified resins thereof. To be done.

As the fluorescent dye binder of the fluorescent type light collecting plate, these resins, a translucent resin (preferably an acrylic resin) having good compatibility with these resins, glass or the like is preferably used.

The case where red and orange are used as the fluorescent dyes will be described as an example. As shown in FIG. 3, the yellow-red part of the incident sunlight (white light) is reflected [reflection component (1)] and then absorbed. Since the incident energy from ultraviolet to blue-violet is converted into emission of yellow-red and emitted or reflected [fluorescent component (2)], the components of yellow-red [(3) = (1) + (2 )].

In the fluorescent type light collecting plate of the present invention, the light (total component (3) of reflected light (1) and fluorescence) emitted or reflected from the fluorescent dye is totally reflected as shown in FIGS. 1 and 2. Are focused on the end face. In this way, light of a certain wavelength is condensed on the end face of the fluorescence type light condensing plate without using a special optical system (lens or reflecting mirror). The wavelength selection (wavelength band shifted to the long wavelength side) can be determined depending on the fluorescent dye used.

The collector used in the present invention may be of any type. The heat collector facing the end face of the fluorescent light collector is preferably a vacuum glass tube type solar heat collector with a selective absorption surface having a heat medium passage in the center, while the heat collector used below or below the fluorescent light collector is A flat plate type solar heat collector with a selective absorption surface having one or more heat medium passages is preferable.

In addition to this point, for the heat collector preferably used in the present invention, the descriptions in the publications and specifications cited in the background of the invention can be referred to.

FIGS. 1 and 2 show a preferred embodiment of the device of the present invention, in which 1 is a fluorescent type light collecting plate containing a fluorescent dye 2 and 3 is sunlight incident on the fluorescent type light collecting plate 1. A protective film provided on the surface (upper surface) as needed, 4 is a first heat collector provided on one end surface of the fluorescent light collector 1, and 5 is provided on the lower surface or below the fluorescent light collector 1. This is the second heat collector.
Reference numeral 6 is a reflection film provided on the other end surface, both side surfaces, etc. of the fluorescent type light collector 1.

That is, in the case of this embodiment, as shown in FIG. 1 and FIG.
The fluorescent type light collector 1 is installed in place of the surface glass or surface resin sheet of the flat plate collector, and the solar energy transmitted through this is collected into the flat plate collector 5 (the heat collecting plate 5A with the selective absorption surface, It is composed of a heat collecting pipe 5B with a selective absorption surface that is thermally conductively connected to the heat collecting plate 5A, and the inside of the pipe 5B serves as a medium passage 5C). A vacuum tube type heat collector 4 (a glass pipe 4A with a selective permeation film) in which a heated medium (fluid such as water, oil or air) is installed on the end face of the fluorescent type light collector, and a selective absorption surface through a vacuum unit. The auxiliary heat collecting pipe 4B is passed through, and the inside of the pipe 4A is a medium passage 4C), and the solar energy collected by the fluorescent type light collecting plate 1 is further heated to raise the temperature.

Thus, high-temperature heat energy can be obtained from solar energy without using a special lens or reflecting mirror.

Reference numeral 7 in the drawing is a communication passage that connects the heat medium passages 5C and 4C. Furthermore, the sunlight incident on the fluorescent type light collector of the present invention may be direct sunlight, scattered light, or convergent light.

Further, in the present invention, it is preferable to apply a technique (for example, clear overlay) for improving the durability (weather resistance) of the fluorescent dye to the protective film 3 and the like.

Furthermore, the devices of the present invention are arranged side by side on the basis of one heat collector 4 (shown by chain lines in the embodiments of FIGS. 1 and 2), and Japanese Patent Publication No. 59-47777. As shown in FIG. 3, a large number of devices of the present invention may be arranged side by side, and
No. -10380, “Fluorescent collector plate of the present invention (in this case, it is better to use a fluorescent collector plate curved upwards) as a canopy member in the“ mediator and device for selectively transmitting radiant energy ”. ) Is preferred.

The details of the fluorescent type light collecting plate used in the present invention are described in
No. 58-32476 and the like, and the description of the publication can be referred to.

EFFECTS OF THE INVENTION According to the present invention, the second heat collector, which is a flat-plate type solar heat collector configured by a heat collecting pipe with a selective absorption surface and a heat collecting plate with a selective absorption surface, by the sun rays passing through the fluorescent type light collecting plate. The heat medium of the container is heated, and the heated heat medium is sent to the first heat collector arranged at the side end of the fluorescent light collector, and the sun captured by the fluorescent dye of the fluorescent light collector is heated. Since the heat medium is further heated by the light beam, it is compared with the conventional solar heat collecting method that heats the heat medium using only the fluorescent type light collector,
It is possible to obtain extremely high light-heat energy conversion efficiency and obtain high-temperature (about 150 to 200 ° C.) heat energy.

[Brief description of drawings]

1 and 2 are principle explanatory views showing an embodiment of the device of the present invention, in which FIG. 1 is an oblique view and FIG. 2 is II-II.
It is a line sectional view. FIG. 3 is a graph showing the wavelength and reflectance when red and orange are used as fluorescent dyes. 1: Fluorescent light collector 2: Fluorescent dye 3: Protective film 4: First heat collector 5: Second heat collector 6: Reflective film

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takuo Shimizu 4-7 Chiyoda, Sakado City, Saitama Wakanadai (56) Reference JP-A-53-5441 (JP, A) Actual development Shou-54-174038 (JP, U) ) Actual development Sho 51-159945 (JP, U)

Claims (4)

[Claims] 1. A first heat collector is arranged at one end of a fluorescent type light collecting plate, and a heat collecting pipe with a selective absorbing surface and a selective absorbing surface are provided at a position facing the sunlight incident surface of the fluorescent type light collecting plate. A heat medium passage in which a second heat collector, which is a flat-plate type solar heat collector composed of heat collecting plates, is arranged, and a heat medium flows between the two heat collectors from the second heat collector side to the first heat collector side. And heats the heat medium passing through the second heat collector by using the sunlight rays that have passed through the fluorescent light collector as a heat source, and then heats the heated heat medium through the heat medium passage to the first heat medium passage. 1. A solar energy concentrating heat collecting method using a fluorescent light condensing plate, characterized in that the solar light is guided to a heat collector and heated by using the solar rays captured by the fluorescent dye of the fluorescent light condensing plate as a heat source. 2. The solar energy collector using the fluorescent light collector according to claim 1, wherein the first heat collector is a vacuum glass tube type solar heat collector having a heat medium passage. Heat collection method. 3. A fluorescent light collecting plate, a first heat collector arranged at one end of the fluorescent light collecting plate, and a second heat collector arranged at a position facing the sunlight incident surface of the fluorescent light collecting plate. And the first heat collector converts fluorescence and reflected light emitted by the fluorescent dye of the fluorescence type light collector into heat energy, and the second light collector has the fluorescence type light collector. It is a flat-plate solar heat collector that consists of a heat collecting pipe with a selective absorption surface and a heat collecting plate with a selective absorption surface that converts the sunlight rays that have passed through the optical device into heat energy. The medium is connected by a heat medium passage that flows from the second heat collector side to the first heat collector side, and the heat medium heated by the second heat collector is the first heat collector.
A solar energy collecting and collecting device characterized by being sent to a heat collector and further heated. 4. A solar energy concentrating heat collecting device according to claim 4, wherein the first heat collector is a vacuum glass tube type solar heat collector having a heat medium passage.