CN216409357U - Medium-temperature heat collection and radiation refrigeration double-effect device adopting sliding rod type fixed light reflecting plate for light condensation - Google Patents
Medium-temperature heat collection and radiation refrigeration double-effect device adopting sliding rod type fixed light reflecting plate for light condensation Download PDFInfo
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- CN216409357U CN216409357U CN202122800402.8U CN202122800402U CN216409357U CN 216409357 U CN216409357 U CN 216409357U CN 202122800402 U CN202122800402 U CN 202122800402U CN 216409357 U CN216409357 U CN 216409357U
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Abstract
The utility model discloses a medium-temperature heat collection and radiation refrigeration double-effect device adopting a sliding rod type fixed light reflecting plate for light condensation, which comprises: the device comprises a radiation cooling reflecting plate, a sliding rod mechanism, a receiver module and a traction module; the radiation cooling reflector comprises an arc-shaped plate layer, the upper surface of the arc-shaped plate layer is covered with a spectrum selective coating, and the lower surface of the arc-shaped plate layer is embedded with a plurality of cooling pipelines horizontally arranged along the stretching direction of an arc line; the traction module is driven by a traction rope to move on an arc-shaped slide bar mechanism, and an adjustable base is arranged below the radiation cooling reflector. The solar energy medium-temperature heat collection and radiation refrigeration device can realize solar energy medium-temperature heat collection and radiation refrigeration at the same time, is high in unit area utilization rate and energy comprehensive utilization rate, high in stability, and has the advantages of light weight and low construction and maintenance cost.
Description
Technical Field
The utility model relates to a solar heat collection and radiation refrigeration integrated device, in particular to a medium-temperature heat collection and radiation refrigeration double-effect device adopting a sliding rod type fixed light reflecting plate for light condensation, and belongs to the technical field of new energy and energy conservation.
Background
Sky radiation refrigeration is a refrigeration mode which utilizes specific wavelength electromagnetic waves which can penetrate atmosphere partially to permanently release heat of objects into the universe in the form of infrared radiation. The technology provides a clean cold source without energy consumption for people, particularly, researches on optics and materials in recent years realize that objects can be cooled under direct sunlight in the daytime, and sky radiation refrigeration attracts wide attention of scientific researchers of countries in the world.
On the other hand, due to the similarity of the solar thermal collector and the radiation refrigeration device in structure and position, and the complementation of function and working period, researchers have proposed that the flat-plate solar thermal collector and the radiation refrigeration device organically combine the two physical processes on the same set of device through the design of spectral characteristics and structural parameters. The composite device can realize solar heat collection in daytime and radiation refrigeration at night, so that the device is multifunctional, all-weather and seasonal, the comprehensive energy utilization efficiency and the time utilization rate are improved, the investment recovery period is shortened, and the large-scale application of renewable energy sources is promoted.
However, the combination of the current solar heat collection and the radiation refrigeration is limited to a flat-plate solar heat collector and a radiation refrigeration device, the flat-plate solar heat collector is generally only suitable for heat collection below 80 ℃, meanwhile, because the solar radiation is required to be reflected as much as possible for better refrigeration in daytime and reduction of the influence of the solar radiation on the refrigeration, the heat collection and the refrigeration are difficult to realize at the same time with high efficiency, the reflector for concentrating and collecting the heat can reflect more than 95% of the solar radiation, and the medium-high temperature solar heat collection can be realized while the radiation refrigeration is carried out by combining with a selective coating suitable for an 'atmospheric window' waveband (8-13 mu m).
The solar light-gathering and heat-collecting modes adopting the reflectors comprise a line focusing mode (groove type, linear Fresnel type) and a point focusing mode (tower type and disc type), wherein the line focusing mode is popularized and applied more due to low cost and wide application range. Working media with higher temperature can be obtained through a light-gathering mode, and solar energy is converted into higher-grade heat energy. However, the above light-gathering manner is not well suited for combining with radiation refrigeration, mainly because: 1) when the reflector works, the reflector needs to rotate according to the position of the sun, so that a refrigeration pipeline is not convenient to arrange; 2) in order to avoid shielding between the reflectors, a larger distance exists between the reflectors, and the effective area of cold radiation is low; 3) the reflector is not directly facing the sky, and the radiation angle coefficient is small and fluctuates, thereby influencing the cold radiation refrigerating capacity. In addition, the current line focusing method has the following defects in heat collection: 1) the construction cost of the heat collecting device is high, for example, the cost of a groove type heat collecting device is about 5.2 yuan/W, the cost of a linear Fresnel type heat collecting device is about 4.5 yuan/W, and the advantages are not obvious compared with the traditional and other energy sources; 2) the maintenance cost is high, a large number of rotating parts exist, the structure is complex, and the failure rate is high; 3) the ground solar utilization rate of unit area is low, and the effective utilization rates of the occupied areas of the trough type heat collector and the linear Fresnel type heat collector are only about 55 percent and 65 percent; 4) the trough type heat collector has the defects of heavier device, poor wind resistance and the like, and the linear Fresnel type heat collector has the defects of lower light condensation efficiency, lower light condensation ratio and the like.
Disclosure of Invention
The technical problem is as follows: the utility model aims to overcome the defects of the existing linear focusing heat collecting device and radiation refrigeration combination mode, provides the efficient linear focusing device which can realize solar medium-temperature heat collection and radiation refrigeration simultaneously and has the advantages of low investment cost, high unit area utilization rate and energy comprehensive utilization rate, good wind resistance, high device stability, light weight and low construction and maintenance cost.
The technical scheme is as follows: in order to solve the above technical problem, the present application provides an intermediate temperature heat collecting and radiation refrigerating double-effect device adopting a sliding rod type fixed light reflecting plate for light condensing, which comprises:
the radiation cooling reflector comprises an arc-shaped plate layer, the upper surface of the arc-shaped plate layer is covered with a spectrum selective coating, the spectrum selective coating comprises a middle infrared high-emission material layer and a solar radiation high-reflection material layer, the arc-shaped plate layer is a groove formed by stretching an arc line, and the lower surface of the arc-shaped plate layer is embedded with a plurality of cooling pipelines horizontally arranged along the stretching direction of the arc line; the lower surfaces of the arc-shaped plate layer and the cooling pipeline are covered with heat-insulating layers.
The reflector adopting the heat collection mode has the following advantages of cold radiation: 1) the reflector is fixed, does not need to rotate, and is convenient for the flow of cooling media and the arrangement of pipelines; 2) the reflectors do not need to be arranged at intervals, and the effective cold radiation area of the unit floor area is high; 3) the reflector faces the sky in a horizontal upward mode, and the angular coefficient of radiation heat exchange is maximized; 4) compared with a single solar heat collecting device and a sky refrigeration radiation device, the device can simultaneously realize medium-temperature heat collection and radiation refrigeration by adopting the same floor area and approximate cost, has higher heat collection efficiency and refrigeration efficiency, and has heat collection power of about 300-700W/m2The refrigerating power is about 20-50W/m in the daytime2At night, about 60-100W/m2。
The slide bar mechanism is composed of 2 arc-shaped supporting rods which are vertically arranged, and the 2 arc-shaped supporting rods are symmetrically distributed on the east and west sides of the radiation cooling reflecting plate array.
The receiver module comprises a movable support and a straight-through vacuum heat collecting tube, wherein the movable support is movably arranged on the corresponding arc-shaped supporting rod, and the straight-through vacuum heat collecting tube is fixedly arranged on the movable support; under the promotion of external force, this receiver module can reciprocate along arc bracing piece.
And the traction modules comprise traction motors, and output shafts of the traction motors are connected to the movable support through traction ropes.
1. The incident light deviating from the axis of the parabola within a certain range (generally within +/-30 degrees) still has better focusing effect after being reflected; 2. the change range of the south-north height angle of the sunlight (the east-west axial mode of the heat collector, which is the angle of incident light) is small in one year (within the lighting period, about 90% of the time is less than +/-30 degrees). The utility model is mainly invented and created based on the two principles so as to solve the problems of the existing line focus heat collector.
The method has the advantages of few movable parts, low requirement on tracking precision and capability of reducing investment cost of movable equipment and control equipment; the solar energy utilization rate of the unit floor area is high (can reach 95 percent) so as to fully utilize the solar energy; the wind resistance and stability are good, the weight is light, and the construction and maintenance cost is low.
Furthermore, the radiation cooling reflecting plate adopts a reflector or a high reflecting aluminum plate to reduce the optical loss caused by reflection.
Further, the arc-shaped plate layer is made of copper, aluminum or glass. Has high heat transfer coefficient and certain hardness.
Furthermore, the middle infrared high-emission material layer is made of silicon dioxide materials or polyethylene glycol terephthalate materials, and has high spectral emissivity in a wave band of 8-13 mu m; the solar radiation high-reflection material layer is made of silver materials and has high reflectivity to solar radiation.
Furthermore, each arc-shaped supporting rod is provided with an arc-shaped outer side surface, a groove is arranged on each arc-shaped supporting rod, each groove is formed by radially and downwards sinking the outer side surface, each groove extends along the extending direction of each arc-shaped supporting rod, and each groove is used for the traction rope to walk. The design of the groove on the arc-shaped supporting rod is convenient for the traction rope to drive the receiver module to move smoothly and smoothly on the track through the rolling connection device; the rotating rod structure and the rotating mechanical equipment are omitted, and the device is simple in structure, light in weight and low in cost.
Further, a base is arranged below the radiation cooling reflector and comprises a rectangular frame, a reflector support rod, an adjusting screw rod and an adjusting nut; the rectangular frame is fixed subaerial, is equipped with a plurality of bolt holes on rectangular frame's the last horizontal pole, and adjusting screw passes the bolt hole, and the cover has 2 adjusting nut who is located horizontal pole top and below respectively on the adjusting screw, adjusting screw upper end fixed connection reflector panel bracing piece, reflector panel bracing piece fixed connection radiation cooling reflector panel. Utilize this adjustment mechanism, can carry out the meticulous regulation to height, radian and the angle of radiation cooling reflector panel in certain extent to make the radiation cooling reflector panel reach the settlement state in place, the base can be fixed through the mode of magnet absorption with the radiation cooling reflector panel, and is quick detachable.
Furthermore, the receiver module also comprises a CPC reflecting plate which is fixed on the movable support and positioned at the upper side of the straight-through type vacuum heat collecting tube, one part of sunlight reflected by the radiation cooling reflecting plate directly irradiates the straight-through type vacuum heat collecting tube, and the other part of sunlight irradiates the straight-through type vacuum heat collecting tube after being reflected by the CPC reflecting plate. The CPC reflector plate can further improve the light condensation ratio of the heat collecting device and reduce the requirement on tracking precision.
Further, the radial cross-section of the light reflecting surface of the arc-shaped plate layer is a part of a parabola and is asymmetrical relative to the symmetry axis of the parabola.
Furthermore, both ends of the cooling pipeline are provided with cooling main pipes.
Drawings
FIG. 1 is a schematic structural diagram of a medium-temperature heat collecting and radiation refrigerating double-effect device adopting a sliding rod type fixed light reflecting plate for light condensation.
Fig. 2 is a schematic view of a radiation cooled reflector panel.
Fig. 3 is a schematic structural view of the slide bar mechanism.
Fig. 4 is a schematic diagram of a receiver module.
Fig. 5 is a schematic structural view of the base.
Wherein: 1 is a radiation cooling reflector, 2 is a slide bar mechanism, 3 is a receiver module, 4 is a base, 5 is a traction device, 101 is an arc slab, 102 is a spectrum selective coating, 103 is a cooling pipeline, 104 is a cooling dry pipe, 105 is an insulating layer, 201 is an arc support bar, 202 is a groove, 203 is a connecting cross bar, 301 is a straight-through evacuated collector tube, 302 is a CPC reflector, 303 is a movable support, 401 is a rectangular frame, 402 is a reflector support bar, 403 is an adjusting screw, and 404 is an adjusting nut.
Detailed Description
Please refer to fig. 1-5.
The double-effect device for medium-temperature heat collection and radiation refrigeration by adopting the slide bar type fixed light reflecting plate for light condensation comprises:
the radiation cooling reflector 1 comprises an arc-shaped plate layer 101, the upper surface of the arc-shaped plate layer 101 is covered with a spectrum selective coating 102, the arc-shaped plate layer 101 is made of copper, the spectrum selective coating 102 comprises a middle infrared high-emission material layer and a solar radiation high-reflection material layer, the middle infrared high-emission material layer is made of silicon dioxide materials, and the solar radiation high-reflection material layer is made of silver materials; the arc-shaped plate layers 101 are grooves formed by arc stretching, and 9 cooling pipelines 103 horizontally arranged along the arc stretching direction are embedded on the lower surface of each arc-shaped plate layer 101; the lower surfaces of the arc-shaped plate layer 101 and the cooling pipeline 103 are covered with an insulating layer 105; the cooling pipe 104 is provided with cooling trunk pipes 104 at both ends.
A base 4 is arranged below the radiation cooling reflecting plate 1 and used for adjusting the position of the radiation cooling reflecting plate 1, and the base 4 comprises a rectangular frame 401, a reflecting plate supporting rod 402, an adjusting screw 403 and an adjusting nut 404; the rectangular frame 401 is fixed on the ground, 5 bolt holes are arranged on the upper cross rod of the rectangular frame 401, the adjusting screw 403 penetrates through the bolt holes, 2 adjusting nuts 404 respectively positioned above and below the upper cross rod are sleeved on the adjusting screw 403, the upper end of the adjusting screw 403 is fixedly connected with a reflector support rod 402, and the reflector support rod 402 is fixedly connected with the radiation cooling reflector 1.
The device comprises a slide bar mechanism 2, wherein the slide bar mechanism 2 consists of 2 arc-shaped supporting rods 201 which are vertically arranged, and the 2 arc-shaped supporting rods 201 are symmetrically distributed on the east and west sides of the radiation cooling reflecting plate 1; each arc-shaped support rod 201 is provided with an arc-shaped outer side surface, a groove 202 is arranged on each arc-shaped support rod 201, each groove 202 is formed by radially sinking the outer side surface downwards, each groove 202 extends along the extending direction of each arc-shaped support rod 201, and each groove 202 is used for the walking of a traction rope; the 2 arc-shaped supporting rods 201 are connected through a connecting cross rod 203.
The receiver module 3 comprises a movable support 303, a straight-through vacuum heat collecting tube 301 and a CPC (compound parabolic concentrator) reflector 302, wherein the movable support 303 is movably mounted on the corresponding arc-shaped support rod 201, and the CPC reflector 302 is positioned on the upper side of the straight-through vacuum heat collecting tube 301 and is fixedly mounted on the movable support 303 together with the straight-through vacuum heat collecting tube 301; under the pushing of an external force, the receiver module 3 can move up and down along the arc-shaped support rod 201. A part of sunlight reflected by the radiation cooling reflecting plate 1 directly irradiates the straight-through vacuum heat collecting tube 301, and a part of sunlight is reflected by the CPC reflecting plate 302 and then irradiates the straight-through vacuum heat collecting tube 301. The length of the straight-through vacuum heat collecting tube 301 is 2m, a metal tube in the straight-through vacuum heat collecting tube 301 is a DN16 stainless steel tube (the outer diameter is 22 mm), and the axial direction of the straight-through vacuum heat collecting tube 301 is the east-west direction.
A traction module 7, wherein the traction module 7 comprises 2 traction motors, and output shafts of the traction motors are connected to the rolling movable support 303 through traction ropes.
In this embodiment: the array consists of 12 medium-temperature heat collection and radiation refrigeration double-effect device units adopting rotating rod type fixed light reflection plates for light condensation, wherein each row comprises 2 units and 6 rows, and the axial direction of the straight-through type vacuum heat collection tube 301 is in the east-west direction. The effective cold radiation area rate of the unit floor area reaches 92 percent; the emissivity of the adopted silicon dioxide spectral coating in the middle infrared band reaches 93 percent. Each radiant cooling reflector 1 has an area of 0.85m 2mm =1.7m2The height of the device is about 1.7 m; the total lighting area of the array is 1.7 x 12=20.4 m2The rated heat collecting power is 15kW, the total manufacturing cost is about 5 ten thousand yuan, and the light condensing ratio is 848.67/22 = 38.6. Constant radiation refrigeration power: 0.6kW in the daytime and 1.8kW at night.
In this embodiment: 1. most of the light with the incident angle within +/-30 degrees from the axis of the parabola can theoretically irradiate the straight-through vacuum heat collecting tube 301 after being reflected; 2. in the period of lighting, the south-north elevation angle (angle of incident light) of the sunlight in one year is less than +/-30 degrees for about 90 percent. Furthermore, the device of the embodiment has a relatively ideal light-gathering effect in one-year operation under the condition that the reflector does not need to be rotated.
The system has the advantages that the effective utilization rate of the unit occupied area is high, and natural energy sources, namely solar heat collection and sky radiation refrigeration, can be fully utilized; the all-weather refrigeration and medium-temperature heat collection (100-300 ℃) can be realized, and the heat collection and refrigeration efficiency is high; meanwhile, the reflector does not need to rotate, the wind resistance is good, the stability of the device is high, and the weight is light; meanwhile, the device has the advantage of low construction and maintenance cost.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, which is defined by the claims.
Claims (8)
1. Adopt middle temperature thermal-arrest and radiation refrigeration economic benefits and social benefits device of slide bar formula fixed reflector panel spotlight, its characterized in that includes:
the radiation cooling reflector comprises an arc-shaped plate layer, the upper surface of the arc-shaped plate layer is covered with a spectrum selective coating, the spectrum selective coating comprises a middle infrared high-emission material layer and a solar radiation high-reflection material layer, the arc-shaped plate layer is a groove formed by stretching an arc line, and the lower surface of the arc-shaped plate layer is embedded with a plurality of cooling pipelines horizontally arranged along the stretching direction of the arc line; the lower surfaces of the arc-shaped plate layer and the cooling pipeline are covered with heat-insulating layers;
the slide bar mechanism consists of 2 arc-shaped support bars which are vertically arranged, and the 2 arc-shaped support bars are symmetrically distributed on the east and west sides of the radiation cooling reflecting plate;
the receiver module comprises a movable support and a straight-through vacuum heat collecting tube, wherein the movable support is movably arranged on the corresponding arc-shaped supporting rod, and the straight-through vacuum heat collecting tube is fixedly arranged on the movable support; under the pushing of an external force, the receiver module can move up and down along the arc-shaped supporting rod;
and the traction modules comprise traction motors, and output shafts of the traction motors are connected to the movable support through traction ropes.
2. The double-effect device for medium-temperature heat collection and radiation refrigeration for condensing light by adopting the sliding rod type fixed light reflecting plate as claimed in claim 1, wherein the arc-shaped plate layer is made of copper, aluminum or glass.
3. The dual-purpose device for medium-temperature heat collection and radiation refrigeration for condensing light by adopting the sliding rod type fixed light reflecting plate as claimed in claim 1, wherein the middle infrared high-emission material layer is made of a silicon dioxide material or a polyethylene terephthalate material, and the solar radiation high-reflection material layer is made of a silver material.
4. The dual-purpose device for medium-temperature heat collection and radiation refrigeration for condensing light by using the sliding-bar type fixed reflecting plate as claimed in claim 1, wherein each arc-shaped supporting rod has an arc-shaped outer side surface, a groove is formed on the arc-shaped supporting rod, the groove is formed by radially sinking the outer side surface, the groove extends along the extending direction of the arc-shaped supporting rod, and the groove is used for the walking of a traction rope; the 2 arc-shaped supporting rods are connected through a connecting cross rod.
5. The double-effect device for medium-temperature heat collection and radiation refrigeration for light condensation by adopting the sliding rod type fixed light reflecting plate as claimed in claim 1, is characterized in that a base is arranged below the radiation cooling light reflecting plate and used for adjusting the height, radian and angle of the radiation cooling light reflecting plate, and the base comprises a rectangular frame, a light reflecting plate supporting rod, an adjusting screw rod and an adjusting nut; the rectangular frame is fixed subaerial, is equipped with a plurality of bolt holes on rectangular frame's the last horizontal pole, and adjusting screw passes the bolt hole, and the cover has 2 adjusting nut who is located horizontal pole top and below respectively on the adjusting screw, adjusting screw upper end fixed connection reflector panel bracing piece, reflector panel bracing piece fixed connection radiation cooling reflector panel.
6. The dual-purpose device for medium-temperature heat collection and radiation refrigeration capable of condensing light by using the sliding-bar type fixed light reflecting plate as claimed in claim 1, wherein the receiver module further comprises a CPC light reflecting plate, the CPC light reflecting plate is fixed on the movable support and is positioned at the upper side of the straight-through type evacuated collector tube, a part of sunlight reflected by the radiation cooling light reflecting plate directly irradiates the straight-through type evacuated collector tube, and a part of sunlight reflected by the CPC light reflecting plate irradiates the straight-through type evacuated collector tube.
7. The dual purpose device for medium temperature heat collection and radiation refrigeration using sliding rod type fixed reflecting plate to concentrate light according to claim 1, wherein the radial section of the reflecting surface of the arc-shaped slab is a part of a parabola and is asymmetric with respect to the symmetry axis of the parabola.
8. The dual-purpose device for medium-temperature heat collection and radiation refrigeration for condensing light by adopting the sliding rod type fixed light reflecting plate as claimed in claim 1, wherein both ends of the cooling pipeline are provided with cooling main pipes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122800402.8U CN216409357U (en) | 2021-11-16 | 2021-11-16 | Medium-temperature heat collection and radiation refrigeration double-effect device adopting sliding rod type fixed light reflecting plate for light condensation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122800402.8U CN216409357U (en) | 2021-11-16 | 2021-11-16 | Medium-temperature heat collection and radiation refrigeration double-effect device adopting sliding rod type fixed light reflecting plate for light condensation |
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| CN216409357U true CN216409357U (en) | 2022-04-29 |
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| CN202122800402.8U Active CN216409357U (en) | 2021-11-16 | 2021-11-16 | Medium-temperature heat collection and radiation refrigeration double-effect device adopting sliding rod type fixed light reflecting plate for light condensation |
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2021
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