CN112413926A - Grating selective passive radiation refrigerating device - Google Patents
Grating selective passive radiation refrigerating device Download PDFInfo
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- CN112413926A CN112413926A CN202011230259.7A CN202011230259A CN112413926A CN 112413926 A CN112413926 A CN 112413926A CN 202011230259 A CN202011230259 A CN 202011230259A CN 112413926 A CN112413926 A CN 112413926A
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- radiator
- refrigerant channel
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- 230000005855 radiation Effects 0.000 title claims abstract description 28
- 239000003507 refrigerant Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 239000006261 foam material Substances 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 238000002310 reflectometry Methods 0.000 claims description 2
- 239000002210 silicon-based material Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000004378 air conditioning Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002370 SrTiO3 Inorganic materials 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
- F25B23/003—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect using selective radiation effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
The invention relates to the technical field of refrigeration, in particular to a grating selective passive radiation refrigeration device, which comprises a grating selective radiator, a refrigerant channel, an insulating layer and an organic transparent cover body, wherein the grating selective radiator is arranged on the upper surface of the insulating layer; the refrigerant channel is arranged at the bottom of the grating selective radiator in a rectangular tubular structure, and the organic transparent cover body is arranged at the top of the grating selective radiator; the heat insulation layer is arranged outside the grating selective radiator and the refrigerant channel; and a refrigerant channel inlet at one end of the refrigerant channel is connected with the compressor, and a refrigerant channel outlet at the other end of the refrigerant channel is communicated with the indoor space through a throttling valve. The invention uses the huge cold source of sky, and adopts the radiation refrigeration mode to obtain the cold quantity under the condition of no energy consumption; the device can realize 50-200W/m according to different selected grating materials2The refrigeration power of the air conditioner can be well used as an auxiliary radiator of a building indoor cooling device or other air conditioning systemsA thermal device.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and particularly relates to a grating selective radiation refrigeration system.
Background
In recent years, the temperature of outdoor environment is rapidly raised due to urban heat island effect and global warming caused by combustion of fossil fuel, heat dissipation of buildings is usually solved by air conditioning and ventilation systems, energy consumption of the systems accounts for more than half of total energy consumption of the buildings, and primary energy causes a great amount of pollution and waste in the process of conversion and utilization, so that in order to solve the increasingly severe energy problem, domestic and foreign students begin to turn attention to a building energy-saving technology with low consumption, high efficiency and zero pollution, and hope to achieve the purpose of reducing the dependence degree of the existing buildings on the primary energy.
A grating is a common microstructure, and its structure is usually composed of a large number of slits with equal width and equal spacing. The wavelength selectivity control based on the influence of the surface characteristics of the microstructure on the radiation characteristics becomes one of the research hotspots nowadays. Compared with the traditional thermal radiation characteristic regulation, the traditional technology mostly depends on changing physical properties, and the microstructure can regulate and control the radiation characteristic more efficiently by virtue of surface plasma/phonon polarization, magnetic polarization, microcavity resonance and other electromagnetic characteristics. The wavelength selectivity research and application of the grating microstructure have been deeply carried out in various fields, such as solar cells, thermophotovoltaic devices, radiation refrigeration and the like.
The sky radiation refrigeration is a passive technology which utilizes the huge cold source of the sky and adopts a radiation refrigeration mode to obtain cold quantity under the condition of no energy consumption. The technology is favored by researchers with the advantage of no external energy input, does not contain any moving and vulnerable parts, and is a renewable energy building energy-saving refrigeration technology with great potential.
For the reasons, the invention designs the grating selective passive radiation refrigerating device.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a grating selective passive radiation refrigerating device, which can enable a grating selective radiator to face the sky and emit the heat of a working medium flowing in a refrigerant channel to the sky in a heat radiation mode so as to obtain a low-temperature refrigerant working medium, and then send the low-temperature refrigerant into a building or an energy storage device for heat exchange.
In order to realize the purpose of the invention, the invention adopts the technical scheme that:
the invention discloses a grating selective passive radiation refrigerating device, which comprises a grating selective radiator, a refrigerant channel, an insulating layer and an organic transparent cover body, wherein the grating selective radiator is arranged on the upper surface of the insulating layer; the refrigerant channel is arranged at the bottom of the grating selective radiator in a rectangular tubular structure, and the organic transparent cover body is arranged at the top of the grating selective radiator; the heat insulation layer is arranged outside the grating selective radiator and the refrigerant channel; and a refrigerant channel inlet at one end of the refrigerant channel is connected with the compressor, and a refrigerant channel outlet at the other end of the refrigerant channel is communicated with the indoor space through a throttling valve.
The grating selective radiator is a grating selective passive night radiator and a grating selective passive all-day radiator; the material in the grating selective passive night radiator is a material with high emissivity in an atmospheric window with a wave band of 8-13 mu m; the material in the grating selective passive all-day radiator is a material which has high emissivity in an atmospheric window with a wave band of 8-13 mu m and high reflectivity in a sunlight wave band of 0.2-2 mu m.
The heat-insulating layer is made of foam materials or rubber materials, and the thickness of the heat-insulating layer is not less than 2 cm.
The organic transparent cover body is made of an organic silicon material or a polystyrene material.
The invention has the beneficial effects that:
1. the sky radiation refrigeration technology has the advantages of no external energy input, no pollution, high efficiency and no moving part in the whole process, and is more reliable and convenient compared with the traditional air-conditioning refrigeration technology;
2. the radiator is composed of a grating structure, and through the diffraction characteristic of the grating structure and the radiation characteristic of the composite material, the selectivity of the grating structure in a full waveband is enhanced, and the refrigeration power of the grating selective passive radiation refrigeration device is improved. Therefore, the energy-saving technology of the invention can save energy and improve refrigeration efficiency, so that the energy-saving technology has more competitive potential compared with other traditional energy-saving technologies and is more suitable for ventilation and cooling application of buildings.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a schematic view illustrating a usage status of the first embodiment;
fig. 5 is a schematic view of a use state of the second embodiment.
In the figure, the grating selective radiator 1, the refrigerant channel 2, the heat insulation layer 3, the organic transparent cover plate 4, the refrigerant channel inlet 5 and the refrigerant channel outlet 6 are arranged.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
see fig. 1-5.
The invention discloses a grating selective passive radiation refrigerating device, which comprises a grating selective radiator 1, a rectangular tubular refrigerant channel 2, an insulating layer 3 and an organic transparent cover plate 4, wherein the grating selective radiator 1 is arranged on the upper side of the refrigerant channel 2, the organic transparent cover plate 4 is arranged on the upper part of the grating selective radiator, one end of the refrigerant channel 2 is provided with a refrigerant channel inlet 5, the other end of the refrigerant channel 2 is provided with a refrigerant channel outlet 6, and the insulating layer 3 is arranged outside the grating selective radiator 1 and the refrigerant channel 2.
The material of the grating selective radiator 1 can be divided into two types according to different requirements of radiation refrigeration time periods: grating selective passive night radiators and grating selective passive all-day radiators.
Grating selective passive night radiator: the grating selective radiator is used for working at night, the cooling requirement of low-temperature environment at night is met, the radiator only needs to have high emissivity in an atmospheric window wave band, the refrigerating requirement can be met, and commonly used materials comprise high polymer polyesters, SiO and SiO2、Al2O3、TiO2And the like. Two or more materials are compounded for use to prepare the multilayer grating structure.
Grating selective passive all-day radiator: the grating selective radiator needs to satisfy both low absorptivity in the solar band and high emissivity in the atmospheric window bandThe need for cold. Commonly used materials are high molecular polyester, SiC, SiO2、Al2O3、TiO2SrTiO3, and the like. Two or more materials are compounded for use to prepare the multilayer grating structure.
The rectangular refrigerant channel 2 is made of copper materials, and can also be made of materials with better heat conduction effect, fins can be added in the rectangular refrigerant channel to enhance fluid disturbance and enhance heat exchange effect.
The insulating layer 3 is made of foam materials, rubber and plastic materials and the like which are commonly used.
The refrigerant in the system is water or R22, R32, R410A, R407C, R134a, R502 and other refrigerants commonly used in air-conditioning systems.
When the grating selective passive radiation refrigerating device is used for refrigerating at night or all day, the radiator can adopt a grating selective structure which is made of a material with low absorptivity in a sunlight wave band and high emissivity in an atmospheric window wave band. The grating selective radiator 1 is placed on a roof, the optimal direction is vertical to the sky direction, and the refrigeration working medium in the refrigerant channel 2 can adopt refrigeration working media such as air, water, refrigerant and the like. When the grating selective radiator is installed, the refrigerant channel 2 is installed by adopting a principle of low-in and high-out, and the thickness of the heat-insulating layer 3 is not less than 2 cm.
The grating selective passive radiation refrigerating device can adopt two embodiments in operation: in the first embodiment, as shown in fig. 4, the grating selective radiator 1 is connected to a radiator in a building room to implement indoor ventilation and cooling through forced convection of a fan, the compressor 7 is connected to the refrigerant channel inlet 5 to send a high-temperature and high-pressure refrigerant into the grating selective radiator 1, the grating selective radiator 1 radiates heat to the sky in a thermal radiation manner to obtain a low-temperature and medium-pressure refrigerant, and then the low-temperature and medium-pressure refrigerant is sent into the throttle valve 9 through the refrigerant channel outlet 6 to implement throttling and pressure reduction, and finally the refrigerant is sent into the indoor 8 end to perform heat exchange, so as to form a cycle, thereby.
In the second embodiment, as shown in fig. 5, the grating selective radiator 1 is connected to an energy storage device (e.g., a liquid storage tank, an ice storage tank, a phase change material, etc.), the other side of the energy storage device is connected to an indoor pipeline, heat exchange is performed to achieve indoor ventilation and cooling, the compressor 7 is connected to the refrigerant channel inlet 5, a high-temperature and high-pressure refrigerant is sent to the grating selective radiator 1, the grating selective radiator 1 radiates heat to the sky in a thermal radiation manner to obtain a low-temperature and medium-pressure refrigerant, and then the low-temperature and medium-pressure refrigerant is sent to the throttle valve 9 through the refrigerant channel outlet 6 to perform throttling and pressure reduction, the throttle valve 9 is connected to the energy storage device (e.g., a liquid storage tank, an ice storage tank, a phase change.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (4)
1. The grating selective passive radiation refrigerating device is characterized in that: comprises a grating selective radiator (1), a refrigerant channel (2), a heat-insulating layer (3) and an organic transparent cover body (4);
the refrigerant channel (2) is arranged at the bottom of the grating selective radiator (1) in a rectangular tubular structure, and the organic transparent cover body (4) is arranged at the top of the grating selective radiator (1); the heat insulation layer (3) is arranged outside the grating selective radiator (1) and the refrigerant channel (2);
and a refrigerant channel inlet (5) at one end of the refrigerant channel (2) is connected with the compressor (7), and a refrigerant channel outlet (6) at the other end of the refrigerant channel is communicated with the indoor space (8) through a throttling valve (9).
2. A grating selective passive radiation refrigeration unit according to claim 1, wherein: the grating selective radiator (1) is a grating selective passive night radiator and a grating selective passive all-day radiator; the material in the grating selective passive night radiator is a material with high emissivity in an atmospheric window with a wave band of 8-13 mu m; the material in the grating selective passive all-day radiator is a material which has high emissivity in an atmospheric window with a wave band of 8-13 mu m and high reflectivity in a sunlight wave band of 0.2-2 mu m.
3. A grating selective passive radiation refrigeration unit according to claim 2, wherein: the heat-insulating layer (3) is made of foam materials or rubber materials, and the thickness of the heat-insulating layer is not less than 2 cm.
4. A grating selective passive radiation refrigeration unit according to claim 3, wherein: the organic transparent cover body (4) is made of an organic silicon material or a polystyrene material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230259.7A CN112413926A (en) | 2020-11-06 | 2020-11-06 | Grating selective passive radiation refrigerating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230259.7A CN112413926A (en) | 2020-11-06 | 2020-11-06 | Grating selective passive radiation refrigerating device |
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| Publication Number | Publication Date |
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| CN112413926A true CN112413926A (en) | 2021-02-26 |
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| CN202011230259.7A Pending CN112413926A (en) | 2020-11-06 | 2020-11-06 | Grating selective passive radiation refrigerating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074424A (en) * | 2021-04-28 | 2021-07-06 | 武汉大学 | Radiation air conditioning system based on polymer aerogel |
| CN114543219A (en) * | 2022-04-28 | 2022-05-27 | 湖南大学 | Double-source air conditioning system |
| CN115031316A (en) * | 2022-06-08 | 2022-09-09 | 广州大学 | Sky radiation cooling system based on aerogel combined material |
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2020
- 2020-11-06 CN CN202011230259.7A patent/CN112413926A/en active Pending
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074424A (en) * | 2021-04-28 | 2021-07-06 | 武汉大学 | Radiation air conditioning system based on polymer aerogel |
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| CN115031316A (en) * | 2022-06-08 | 2022-09-09 | 广州大学 | Sky radiation cooling system based on aerogel combined material |
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