TWI834069B - Solar energy storage system - Google Patents

Abstract

A solar energy storage system has a box arranged on a base, a heat collecting device is arranged in the box, at least one condenser lens is arranged on the top surface of the box, and a plurality of liquid level weight devices are respectively arranged on the box. Each corner position inside the box and at least one optical path mechanism are correspondingly arranged between at least one condensing lens and the heat collecting device to collect the light irradiating the at least one condensing lens in the heat collecting device, wherein The base has a universal adjustment member corresponding to the center of gravity of the box counterweight. By setting a liquid level weight device and a universal adjustment member in the box, the top surface of the box can be adjusted toward the sun. direction to achieve the effect of chasing the sun.

Description

Solar energy storage system

The invention relates to solar thermal power generation, in particular to a concentrated solar energy storage system that can improve the utilization rate of sunlight and reduce its size.

Concentrated solar power generation has been developed for decades, but it has never been widely used. One of the reasons is that the utilization rate of collecting and converting sunlight is not high. In addition to scattering between the reflector and the receiver, the collection of sunlight In addition to dissipation, there is also the loss of light energy caused by the reflection of the light energy received by the receiver during conversion or saturation, and the receiver exposed to the atmosphere will also have a very high convection heat loss, and among them, the high-temperature-resistant giant generator set It is also difficult to manufacture and expensive, which limits the use temperature and greatly affects the conversion efficiency. In addition, the installation environment also occupies a vast area. In case of fire, it cannot block light energy in time and is flame retardant. It is not suitable for use in urban areas and will increase transportation costs. Electricity costs and high temperature light damage harm birds and the environment.

Based on the above deficiencies, the purpose of the present invention is to provide a solar energy storage system, especially a concentrated solar energy storage system that can improve the utilization rate of sunlight and reduce the size.

Based on the above purpose, the present invention provides a solar energy storage system, which has a box arranged on a base, a heat collecting device arranged in the box, and at least one condenser lens arranged in the box. The top surface of the body, wherein the box is a hollow box, has a plurality of liquid level weight devices respectively arranged at each corner position inside the box.

Preferably, there is also at least one optical path mechanism, correspondingly disposed between the at least one condenser lens and the heat collecting device, for collecting the light irradiated on the at least one condenser lens, and the optical path mechanism is a light guide. lens group or a light pipe group.

Preferably, it also includes a universal adjustment member disposed on the base and corresponding to the center of gravity of the box.

Preferably, the optical path mechanism rotates with the box.

Preferably, the inside of the box is a vacuum chamber.

Preferably, a heat storage tank is disposed in the box and connected to a heat transfer device of the heat collecting device. The heat storage tank has an output pipe and an input pipe passing through one side of the box.

Preferably, the liquid level weight device has a liquid level adjustment controller for introducing liquid from an external water source into the liquid level weight device or discharging liquid discharged from the liquid level weight device into a liquid storage tank.

Preferably, there is a lifting roller blind arranged on the box body, the lifting roller blind is used to cover the top surface of the box body, and a cleaning device is arranged between the lifting roller blind and the box body.

Preferably, the aforementioned heat collecting device has a light absorbing body, and the light absorbing body is a hollow cavity.

10: Cabinet

12: condenser lens

15: base

151: Universal adjustment piece

21:Light guide

21a: Reflective layer

21b:Insulation layer

30:Heat collecting device

31,41:Light absorber

32:Heat storage tank

321:Output tube

322:Input tube

42:Heat transfer tank

43:Heat transfer device

44: Thermoelectric chip module

50: Lifting roller blind

51:Sprinkler

52:Roller brush

61:Focusing lens

62:Reflector

63: Focal length conversion lens

70: Liquid level counterweight device

72:External water source

74:Liquid reservoir

L:Light

Figure 1 is a schematic diagram of the first embodiment of the present invention.

Figure 2 is a light path diagram of the first embodiment of the present invention.

Figure 3 is a schematic diagram of the second embodiment of the present invention.

Figure 4 is a schematic diagram of the cleaning device according to the second embodiment of the present invention.

Figure 5 is a schematic diagram of the third embodiment of the present invention.

Figure 6 is a light path diagram of the third embodiment of the present invention.

Figure 7 is a schematic diagram of the fourth embodiment of the present invention.

Figure 8 is a schematic diagram of the fifth embodiment of the present invention.

Figure 9 is a schematic diagram of the sixth embodiment of the present invention.

In order to clearly illustrate the specific implementation, structure and achieved effects of the present invention, the description is as follows with reference to the drawings: Please refer to Figures 1 to 4, which illustrate a solar energy storage system with a box 10 disposed on a base 15 Above, the box 10 is a rectangular box. The solar energy storage system includes a heat collecting device 30 disposed in the box 10 and at least one condenser lens 12 disposed on the top surface of the box 10. The condenser lens 12 Preferably, it is a Fresnel lens. The light absorption rate of the condenser lens 12 is less than 5%, and at least one optical path mechanism is correspondingly disposed between the at least one condenser lens 12 and the heat collecting device 30 for focusing the irradiation. For the light L of the at least one condenser lens 12, the optical path mechanism is separated from the at least one condenser lens 12 by a distance. The interior of the box 10 is a vacuum cavity, which is used to reduce light loss and achieve heat insulation. The optical path mechanism rotates with the box 10 .

The heat collecting device 30 used in the first and second embodiments of the present invention includes a light absorber 31 connected to a heat storage tank 32, where the light absorber 31 is a hollow spherical cavity. The inner surface has a light-absorbing layer (not shown), which can achieve a light absorption rate of at least 95%. When light L enters the inside of the light-absorbing body 31, it will be continuously reflected and converted into heat energy in the light-absorbing body 31. The material of the light-absorbing layer may be, but is not limited to, graphite, tungsten carbide, carbon nanotubes or nanomaterials. In other embodiments, the heat collecting device 30 is not limited to the foregoing structure and can be any form of heat collecting device 30 .

Please refer to Figures 1 and 2 for a first embodiment of the present invention. In the first embodiment, a plurality of condenser lenses 12 are provided on the top surface of the box 10, and the optical path mechanism is a light pipe group. The light pipe group has a plurality of light pipes 21 spaced apart, and the part of the light pipe 21 close to the top surface of the box 10 is a plurality of tubes spaced apart, and one end of the light pipe group is connected to the heat collector. The other end of a light absorber 31 of the device 30 is spaced a distance from the condenser lens 12 . The distance is approximately equal to the focal length of the condenser lens 12 , thereby reducing the inner diameter of the light guide tube 21 .

In the first embodiment, a reflective layer 21a is disposed on the inner surface of the light pipe 21. The reflective layer 21a receives the light L reflected from the condenser lens 12, and an insulation layer 21b is disposed on the light pipe 21. The outer surface of the thermal insulation layer 21b has the characteristics of low thermal conductivity, low radiation dissipation and high temperature resistance. The material of the thermal insulation layer 21b can be but is not limited to zirconia, diatomaceous earth, ceramic wool, porous mixture or nanomaterials.

In actual use, the box 10 can be optionally installed on a base 15, and a heat collecting device 30 is installed in the box 10. The heat collecting device 30 has a light absorber 31 connected to a heat storage tank 32. The heat tank 32 has an output pipe 321 and an input pipe 322 running through one side of the box 10 . External liquid is input into the heat storage tank 32 through the input pipe 322 . When the heat storage tank 32 contacts the heat collecting device 30 When the light absorber 31 is removed, the temperature of the light absorber 31 is transferred to the heat storage tank 32, causing the liquid in the heat storage tank 32 to heat up and vaporize, and the gas flows out from the output pipe 321 to the power generation device (not shown in the figure). It uses fluid kinetic energy to drive the power generation device to generate electricity, or it can perform multiple tasks such as seawater desalination or steam reforming to produce hydrogen.

Please refer to FIG. 2 , which is a path diagram of light in the light guide 21 . In the first embodiment, the top surface of the box 10 is facing the position facing the sun, and the light L is refracted by the condenser lens 12 and focused on the guide. In the light pipe 21, and after multiple reflections by the reflective layer 21a, it enters the light absorber 31 of the heat collecting device 30; at this time, the light contacts the light absorber 31 of the light absorber 31, and the light L continues in the light absorber 31. In addition to several reflections, the light-absorbing layer will also convert the light L into heat energy. The light-absorbing body 31 conducts the heat energy to the heat storage tank 32, and then conducts the heat energy to external facilities through the output tube 321, such as conducting the heat energy to The water storage barrel heats the liquid in the water storage barrel and uses it as hot water. In this embodiment, the light absorber 31 is in direct contact with the heat storage tank 32, which can reduce the loss during heat energy transfer.

Please refer to Figures 3 and 4 for a second embodiment of the present invention. A lifting roller blind 50 is also installed on the top surface of the box 10. The lifting roller blind 50 is used to cover the top surface of the box. When used as a heat collecting device 30 When there is a malfunction or is temporarily not in use, the lifting roller blind 50 can be used to block sunlight and block heat sources; in addition, a cleaning device is also provided between the lifting roller blind 50 and the top surface of the box 10. The cleaning device can be a roller brush. 52 and/or sprinkler 51, when the heat collecting device 30 fails or is temporarily not in use, the lifting roller blind 50 can be pulled up to cover the top surface of the box 10, thereby blocking the sun's rays L from preventing the heat collecting device 30 In addition to burning, it can also prevent sand, dust, hail and other foreign objects from causing damage to the box 10. In addition, when the lifting roller shutter 50 is raised and lowered, it can also clean the surface of the box 10, and the rolling direction of the lifting roller shutter 50 when it is raised and lowered is in the direction of The bottom surface direction of the lifting roller blind 50 is rotated, so foreign objects on the lifting roller blind 50 can also be dropped due to gravity when the lifting roller blind 50 is rolled up, thereby achieving a self-cleaning effect.

Please refer to Figure 5 for a third embodiment of the present invention. In the third embodiment, a plurality of condenser lenses 12 are provided on the top surface of the box 10. The optical path mechanism is a light guide lens group, each of which condenses light. The optical path between the lens 12 and the heat collecting device 30 has at least one focal length conversion lens 63, at least one reflector 62 and at least one focusing lens 61 arranged in sequence, and the focal length conversion lens 63 is relatively close to The condenser lens 12 is disposed, the focus lens 61 is disposed relatively close to the heat collecting device 30, and the reflector 62 is disposed between the focal length conversion lens 63 and the focus lens 61. Therefore, between the light absorber 31, Three different temperature ranges of high, medium and low are formed between the optical path mechanism and the condenser lens 12, thereby enabling more efficient selection of light collecting materials to reduce costs.

Please refer to Figure 6 , which is a schematic diagram of the light path of the light L entering the heat collecting device through the optical path mechanism. When the light L is refracted by the condenser lens 12 and enters the box 10 , the light L is refracted to the reflector 62 through the focal length conversion lens 63 . It is reflected to the focusing lens 61 through the reflecting mirror 62 , and the light L enters the light absorber 31 through the focusing lens 61 , so that the light L is continuously reflected and absorbed in the heat collecting device 30 , thereby generating heat energy, and passing through the light absorber 31 The thermal energy is transferred to the heat storage tank 32, and then transferred to external facilities for application through the output pipe 321, for example, the thermal energy is transferred to a water storage tank, so that the liquid in the water storage tank is heated and used as hot water.

Please refer to Figures 7 and 8 for fourth and fifth embodiments of the present invention. The heat collecting device 30 used in the fourth and fifth embodiments of the present invention includes a light absorber 41 connected to a heat transfer groove 42, and a The heat transfer device 43 is disposed in the heat transfer slot 42. The heat transfer device 43 may be but is not limited to a heat transfer tube; and a thermoelectric chip module 44 is disposed between the heat transfer slot 42 and a heat transfer device 43, wherein The light absorber 41 is a hollow spherical cavity. The heat transfer groove 42 on the top of the light absorber 41 is filled with thermal conductive medium and is connected to the heating end of the thermoelectric chip module 44 or to the heat transfer device 43. When a thermoelectric When the chip module 44 is installed, the heat transfer device 43 is connected to the cold end of the thermoelectric chip module 44. When the light L is refracted by the condenser lens 12 and enters the box 10, the light L is continuously reflected in the light absorber 41 and is After absorption, thermal energy is generated, and the thermal energy is transferred to the thermoelectric chip module 44 or the heat transfer device 43 through the thermal conductive medium, and the heat transfer device 43 transfers the thermal energy to the heat storage tank 32 or external facilities. In this way, not only the thermoelectric chip module 44 can be effectively utilized for power generation, but also the waste heat energy of the thermoelectric chip module 44 can be transferred to the heat storage tank 32 or external facilities to improve energy efficiency. In other embodiments, the heat collecting device 30 is not limited to the foregoing structure and can be any form of heat collecting device.

Please refer to Figures 7 and 8 for fourth and fifth embodiments of the present invention. In the fourth and fifth embodiments, the box 10 is a rectangular box with a universal adjustment member 151 disposed on the base. on the base 15, and the setting position of the universal adjustment member 151 is set corresponding to the position of the center of gravity of the box 10 (that is, the center point position of the diagonal line of the box) to facilitate the adjustment of the box 10 Angle, and has four liquid level counterweight devices 70 arranged at the four corners of the interior of the box 10. The liquid level counterweight device 70 is a water tank. The sun rises from the east and sets from the west every day. In order to completely collect the sun Light, by setting the liquid level weight device 70 and using it with the universal adjustment member 151, can individually control the amount of liquid in each water tank according to the position of the sun, so that the tank 10 can present different installation angles, such as , when the sun's illumination angle is located on the right side of the box 10, the amount of liquid in the two water tanks on the right side of the box 10 is controlled to be greater than the amount of liquid in the two water tanks on the left side of the box 10, so that the box 10 tilts toward the right , in this way, the top surface of the box 10 can be directed towards the sun, and the sunlight can be completely collected to achieve the effect of chasing the sun. In other embodiments, the number of the liquid level weight devices 70 is two, and they are respectively disposed at the center points of the two long sides or the two short sides inside the box 10 , which can also achieve the aforementioned control box 10 . The effect of the position of the top surface facing the sun. In addition, the box 10 may also have other symmetrical geometric structures.

Please refer to FIG. 9 for a sixth embodiment of the present invention. In the sixth embodiment, the liquid level weight device 70 also has a liquid level adjustment controller. The liquid level weight device 70 is connected to an external water source 72 and an external water source 72 . Liquid storage tank 74, the liquid level adjustment controller is used to control the liquid in and out of the water tank, introduce the liquid from the external water source 72 into the water tank or discharge the liquid discharged from the water tank into the liquid storage tank 74 to facilitate resource reuse, to control The tilt angle of the box 10 achieves the effect of tracking the sun.

The water pressure and liquid level adjustment controller of the external water source 72 is used to control the liquid level of the water tank to change the tilt angle of the tank 10, so as to achieve the sun tracking function without using the power motor to save power. Energy consumption, in addition, the controller can be adjusted to drain part of the liquid in the water tank after sunset, so that the tilt angle of the tank 10 returns to the initial position in the morning.

The present invention controls the top of the box 10 by placing the box 10 on the base 15 with the universal adjustment member 151 and adjusting the liquid capacity in the liquid level weight device 70 through the liquid level adjustment controller. Facing the sun, it achieves the effect of chasing the sun, and is equipped with a heat collecting device with high light collection to achieve a compact and high sunlight utilization solar energy storage system.

10: Cabinet

32:Heat storage tank

41:Light absorber

50: Lifting roller blind

70: Liquid level counterweight device

Claims (9)

A solar energy storage system includes: a box disposed on a base, the box being a hollow box with a plurality of mutually independent liquid level weight devices respectively disposed at each corner position inside the box; A heat collecting device is disposed in the box; at least one condensing lens is disposed on the top surface of the box; and at least one optical path mechanism is correspondingly disposed between the at least one condensing lens and the heat collecting device for collecting Light irradiating the at least one condenser lens. The solar energy storage system as described in claim 1, wherein the light path mechanism is a light guide lens group or a light guide group. The solar energy storage system according to claim 1, further comprising a universal adjustment member disposed on the base and corresponding to the center of gravity of the box. The solar energy storage system as described in claim 1, wherein the inside of the box is a vacuum cavity. As for the solar energy storage system described in claim 1, a heat storage tank is installed in the box and connected to a heat transfer device of the heat collecting device. The heat storage tank has an output pipe and an input pipe passing through the box. one side of the body. The solar energy storage system of claim 1, wherein the liquid level weight device has a liquid level adjustment controller for introducing liquid from an external water source into the liquid level weight device or moving the liquid level weight device The discharged liquid is discharged into a liquid reservoir. The solar energy storage system as claimed in claim 1, further comprising a lifting roller blind disposed on the box. The lifting roller blind is used to cover the top surface of the box. The rolling direction of the lifting roller blind when it is raised and lowered is toward The bottom surface direction of the lifting roller blind rotates. The solar energy storage system as claimed in claim 7, further comprising a cleaning device disposed between the lifting roller shutter and the box. The solar energy storage system according to any one of claims 1 to 8, wherein the heat collecting device has a light absorber, and the light absorber is a hollow cavity.