KR102618308B1 - Heat saving device using fresnel lens - Google Patents

Abstract

The present invention includes a heating tube for storing water or a heat medium, a Fresnel lens located on the upper part of the heating tube, and a Fresnel lens and heating tube to focus the Fresnel lens on the upper surface of the heating tube to collect light. In the solar thermal storage device consisting of a gap maintenance member to maintain the gap with the upper surface, the inside of the heating tube extends from the ceiling of the heating tube heated by condensing light, and the lower part is immersed in water or a heat medium to transfer heat. The purpose of the present invention is to provide a solar heat storage device using a Fresnel lens composed of a heat diffusion member. The effect of the present invention is to directly heat the heating tube by the Fresnel lens, but to provide a heat diffusion means inside the heating tube to enable rapid heat transfer. In addition, the collector and the heating tube are formed as one body, but the water or heat medium can be heated more quickly by the heat transfer member and heat dissipation member extending from the collector. Additionally, during the condensing process, the water or heat medium inside the heating tube can be heated. If the heating medium is too heated, the blocking means can be spread over the Fresnel lens to block sunlight and prevent damage to the heating tube, explosion, or fire risk, and the joint driving means and the hemispherical concave groove of the collector can be used to block the sunlight. It is a very useful invention that allows efficient heat storage by maximizing the concentrating effect of sunlight while adjusting the inclination angle of the lens.

Description

Heat saving device using fresnel lens}

The present invention relates to a solar thermal storage device using a Fresnel lens. More specifically, the present invention relates to a solar heat storage device using a Fresnel lens to collect sunlight, but also to efficiently collect and store heat, as well as to stably manage stored high-temperature water. It relates to optical heat storage devices.

Generally, devices using solar energy are divided into power generation devices using solar energy and heat storage devices using solar energy.

In particular, solar light concentrating means for thermal storage devices using solar energy can be divided into lens type and reflector type, and in the case of lens type, Fresnel lens, which is capable of two-dimensional light collection, is usually used. The Fresnel lens refers to a Fresnel band-shaped planar lens, and is a lens structured by arranging a number of small lenses in a circular ring shape to shorten the focal length.

In this way, when the Fresnel lens concentrates sunlight and focuses it, the sunlight is concentrated at the focus and high heat is generated in the relevant area. The high heat obtained in this way is used to heat water or a heat medium and then stored in a heat storage tank and used as necessary. When using high-temperature water.

The prior art related to solar heat storage device using existing Fresnel lens is disclosed in Korean Patent Publication No. 10-1499357, “Solar heat storage device using Fresnel lens and heat pipe” (registration date: 2015.02.27). Likewise, a concave reflector to reflect sunlight and focus on the upper part, a Fresnel lens installed on the top of the concave reflector to focus on the lower part, and a concave reflector and a Fresnel lens installed between the concave reflector and the Fresnel lens. A heat collector located at the focus of the lens, a heat pipe on one side inserted into the side of the collector and inclined upward as it moves away from the collector, a heat sink installed on the other side of the heat pipe to dissipate heat, and , a heat exchange unit of a sealed structure for transferring heat generated from the heat sink to the heat transfer medium, a heat storage tank for storing the heat transfer medium heated from the heat exchange unit, and connecting the heat exchange unit and the heat storage tank to circulate the heat transfer medium. It is composed of a circulation pipe for

Another prior art related to the existing Fresnel lens is as disclosed in Korean Patent Publication No. 10-2013-0081774 “Solar energy utilization device using Fresnel lens” (publication date: 2013.07.18), from front to back. A cylindrical lens housing whose aperture gets smaller as it goes down; A Fresnel lens installed at the front end of the lens housing to collect sunlight and irradiate it to the rear inside the lens housing; A power generation load housing coupled to and installed at the rear end of the lens housing and having a rectangular cylinder shape; A parallel light conversion lens installed outside the focal distance of the Fresnel lens inside the rear end of the lens housing and converting sunlight collected by the Fresnel lens into parallel light parallel to the power generation unit housing; A solar power generation unit installed at the inner rear end of the power generation unit housing and generating power using solar energy; It is installed obliquely in front of the solar power generation unit inside the power generation unit housing, and reflects light in the long-wavelength region of sunlight toward one side wall of the lens housing and transmits light in the short-wavelength region toward the solar power generation unit. Beam splitting unit; Among the side walls of the power generation unit housing, one side wall in the direction in which light in the long-wavelength range emitted by the beam splitting unit is irradiated is opened and installed, and includes a solar energy utilization unit that heats the heat medium by light in the long-wavelength range.

However, when condensing light using a conventional Fresnel lens, extremely high temperature heat is generated during the condensing process, and no means have been devised to effectively manage the heated water or heat medium, which poses a risk of damage to the device, explosion, or fire. It has the disadvantage of existing risks.

[Prior art literature]

1. Korean Patent Publication No. 10-1499357

The purpose of the present invention is to effectively manage the heat generated in the light concentrating process and the water or heat medium heated by the heat using a Fresnel lens so that it can be used for heating or power generation, and for this purpose, to enable efficient heat storage by solar energy. It is in doing.

A solar heat storage device using a Fresnel lens according to an embodiment of the present invention to achieve the above-described object includes a heating passage for storing water or a heat medium, a Fresnel lens located on an upper part of the heating passage, and A spacer for maintaining the gap between the Fresnel lens and the upper surface of the heating tank so that the Fresnel lens can focus and collect light on the upper surface of the heating tank, and a heating tank ceiling that is heated by condensing light inside the heating tank. It extends from and the lower part is composed of a heat diffusion member for transferring heat by being immersed in water or a heat medium.

According to an embodiment of the present invention, a heat collecting member formed integrally with the heating tube is exposed at the center of the upper surface of the heating tube, a heat transfer member extending from the heat collecting port, and a plurality of heat dissipating members extending from the heat transfer member. It is characterized by being composed of.

According to an embodiment of the present invention, the upper surface of the collector is characterized by a hemispherical concave groove formed to facilitate focusing when the Fresnel lens is inclined.

According to an embodiment of the present invention, a blocking film means for blocking sunlight is configured to open and close on the upper part of the Fresnel lens.

According to an embodiment of the present invention, the barrier means includes a motor formed on one side of the Fresnel lens, a shaft rotated by the motor, a tow line wound around the shaft, and one end connected to the tow line and the other end to a coil spring. It is characterized by being composed of a screen wound on a roll that acts on elasticity.

According to an embodiment of the present invention, the space maintaining device is provided with joints so that it can be folded or unfolded, and is characterized in that it is configured to adjust the inclination angle of the Fresnel lens by forming a joint driving means between the joints.

The effect of the present invention as described above is that the heating tube is directly heated by the Fresnel lens, but a heat diffusion means is formed inside the heating tube to enable rapid heat transfer.

In addition, the collector and the heating tube are formed as one body, but water or heat medium can be heated more quickly by the heat transfer member and heat dissipation member extending from the collector.

In addition, if the water or heat medium inside the heating tube is heated too much during the light concentrating process, a blocking film can be spread over the Fresnel lens to block sunlight and prevent damage to the heating tube, explosion, or risk of fire.

In addition, it is a very useful invention that can adjust the inclination angle of the Fresnel lens through the joint driving means and the hemispherical concave groove of the collector, while maximizing the concentrating effect of sunlight and enabling efficient heat storage.

Figure 1 is a perspective view of a solar heat storage device using a Fresnel lens according to an embodiment of the present invention.
Figure 2 is a longitudinal cross-sectional view of Figure 1.
Figure 3 is a cross-sectional view of Figure 1.
Figure 4 is a perspective view of a solar heat storage device using a Fresnel lens according to another embodiment of the present invention.
Figure 5 is a longitudinal cross-sectional view of Figure 4.
Figure 6 is a cross-sectional view of Figure 4.
Figure 7 is a reference diagram to show the operating state of the present invention. Figure (a) is to show the state of adjusting the height of the Fresnel lens, and Figure (b) is to show the state of concentrating sunlight by the Fresnel lens. .
Figure 8 is a drawing showing another embodiment of the present invention, and is a reference diagram showing a state in which a joint driving means is formed between the joint portion of the space maintaining device.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. The terminology used herein is only intended to refer to specific embodiments and is not intended to limit the invention. Also, as used herein, singular forms also include plural forms, unless phrases clearly indicate the contrary. As used in the specification, the meaning of "comprising" is to specify a specific characteristic, area, integer, step, operation, element and/or component, and to specify another specific property, area, integer, step, operation, element, component and/or group. It does not exclude the existence or addition of . Although not defined differently, all terms including technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries are further interpreted as having meanings consistent with the related technical literature and currently disclosed content, and are not interpreted as ideal or official meanings unless defined.

Embodiments of the present invention described with reference to the perspective view specifically represent ideal embodiments of the present invention. As a result, various variations in the illustrations, for example variations in manufacturing methods and/or specifications, are expected. Accordingly, the embodiments are not limited to the specific shape of the illustrated area and also include variations in shape due to manufacturing, for example. For example, areas shown or described as flat may generally have rough/rough and non-linear characteristics. Additionally, portions shown as having sharp angles may be rounded. Accordingly, the areas shown in the drawings are only approximate in nature, and their shapes are not intended to illustrate the exact shape of the areas, nor are they intended to narrow the scope of the present invention.

Hereinafter, preferred embodiments of the solar heat storage device using a Fresnel lens according to the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a perspective view of a solar heat storage device using a Fresnel lens according to an embodiment of the present invention, Figure 2 is a longitudinal cross-sectional view of Figure 1, Figure 3 is a cross-sectional view of Figure 1, and Figure 4 is another embodiment of the present invention. This is a perspective view of a solar heat storage device using a Fresnel lens according to an example, Figure 5 is a longitudinal cross-sectional view of Figure 4, Figure 6 is a cross-sectional view of Figure 4, and Figure 7 is a reference diagram showing the operating state of the present invention. Figure (a) is for showing the state of adjusting the height of the Fresnel lens, Figure (b) is for showing the state of concentrating sunlight by the Fresnel lens, and Figure 8 is a diagram showing another embodiment of the present invention. This is a reference diagram to show the state in which the joint driving means is formed between the joint part of the space maintaining device.

First of all, it should be noted that in the drawings, identical components or parts are indicated by the same reference numerals whenever possible. Additionally, in describing the present invention, detailed descriptions of related well-known functions or configurations will be omitted in order to make the gist of the present invention unambiguous.

The solar heat storage device 100 using the Fresnel lens of the present invention includes a heating tube 120 storing water or a heat medium (A), a heating tube 120 installed at the top of the heating tube 120, and A Fresnel lens 110 located at the top of the heating tube 120, and a heating tube ( 120) It consists of a gap maintenance member 140 to maintain the gap between the Fresnel lens 110 and the upper surface, and extends from the ceiling of the heating tube 120, which is heated by condensing light, inside the heating tube 120. And the lower part is composed of heat diffusion members 160 and 160a to transfer heat by being submerged in water or heat medium A.

At this time, the heating tube 120 is preferably made of a metal body, and the outside is preferably covered with an insulating material for insulation. In addition, the present invention can collect light by exposing the heat collecting port 130, which is integrated with the heating tube 120, to the upper surface of the heating tube 120.

In this way, the heat diffusion members 160 and 160a can directly transfer the heat collected by the upper part of the heating tube 120 or the collector 130 to water or the heat medium A, thereby maximizing thermal efficiency.

At this time, the heat diffusion member 160a may be formed in a round shape along the inner diameter of the heating tube 120 and may be made of a metal ring structure where the upper and lower ends are welded to the heating tube 120, or the heat diffusion member 160a may be formed in a round shape along the inner diameter of the heating tube 120. And it may be made of a heat transfer member 160 in the shape of a rod or plate extending from the collector 130. At this time, for more effective heat transfer, the heat transfer member 160 may be provided with a heat dissipation member 161 having a plurality of rods or plate shapes so that the heat dissipation member 161 is submerged in water or a heat medium (A).

It is preferable that the heat diffusion member uses a metal material that has good heat transfer and is not prone to corrosion.

In addition, the present invention is designed to prevent the heating tube 120 from being damaged or causing an explosion or fire when the water or heat medium in the heating tube 120 is heated too much by the Fresnel lens 110. A blocking means is installed to block the Nellens 110.

The barrier means may be configured to be rotatably opened and closed like a door by means of a hinge structure, but considering the efficiency of structure and operation, the most preferable barrier means is to form a motor 152 on one side of the Fresnel lens 110. A shaft 151 rotated by the motor 152, a tow line 153 wound around the shaft 151, one end of which is connected to the tow line 153 and the other end of which has the elasticity of a coil spring (not shown). It is composed of a screen 154 wound around a working roll. At this time, the coil spring, roll, and screen 154 are normally built into the case 154a, and the screen 154 controls the temperature measured by the water temperature sensor mounted inside the heating tank 120 by the control unit (not shown). ) has a structure that activates when it is determined that the temperature is higher than the set temperature.

Since the Fresnel lens 110 has a flat plate-like and thin structure, heat-resistant glass plates may be formed on both sides of the Fresnel lens 110 to support it to protect it.

At the lower part of the Fresnel lens 110, the gap maintenance member 140 for supporting the Fresnel lens 110 is provided with a joint part 141 that can maintain the bent state and can be manually folded or unfolded, but rather, the joint part 140 can be folded or unfolded. It is preferable to form a joint driving means 170 between (141) and the joint portion 141 so that the inclination angle of the Fresnel lens 110 can be adjusted. The joint driving means 170 is preferably configured to operate mechanically using various actuators. At this time, an actuator refers to a driving device that operates a machine using power, and it mainly consists of an electric motor or a piston or cylinder mechanism operated by hydraulic or pneumatic pressure. The actuator may be configured to track the sun by a control means (not shown). In this case, if the upper surface of the collector 130 for concentrating solar light is flat, it is difficult to converge light, so the hemispherical concave groove 131 is used. It is formed so that the Fresnel lens 110 can easily focus even if it is tilted toward the sun by driving the actuator, thereby ensuring good light collection.

In the present invention, the lower part of the gap maintainer 140 may be installed directly on the heating tube 120, but it is preferable to install it on the frame 121 installed to surround the heating tube 120, and the Fresnel lens 110 It may be configured to be coupled to the top of the gap maintainer 140, but this may cause damage to the Fresnel lens 110, so the Fresnel lens 110 is wrapped with a frame 111 and the frame 111 is used as a gap maintainer. (140) It is desirable to bind it to the top.

As described above, although the present invention has been described in terms of limited embodiments, the present invention is not limited thereto, and the technical idea of the present invention will be described below by a person skilled in the art to which the present invention pertains. Various modifications and variations are possible within the scope of equivalency of the patent claims.

100:Solar heat storage device
110: Fresnel lens
120: Heating tank
130: collector
140: Spacing maintenance device
A: Water or heat medium

Claims (6)

A heating tube for storing water or a heat medium, a Fresnel lens located at the top of the heating tube, a Fresnel lens and an upper surface of the heating tube to focus the Fresnel lens on the upper surface of the heating tube to collect light. A solar heat storage device comprising a gap maintenance member to maintain the gap between the heating tube and a heat diffusion member inside the heating tube, which extends from the ceiling of the heating tube heated by condensing light and whose lower part is immersed in water or a heat medium to transfer heat. In
The gap maintainer forms a joint driving means 170 between the joint portion 141 and the joint portion 141 to adjust the inclination angle of the Fresnel lens 110,
The upper end of the joint portion 141 is coupled to the edge of the Fresnel lens 110 or the frame 111 surrounding the Fresnel lens 110 to support the Fresnel lens 110,
A solar heat storage device using a Fresnel lens, characterized in that the lower end of the joint 141 is installed on the heating tube 120 or the frame 121.







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