CN215675901U - Lithium bromide absorption refrigeration system based on solar energy - Google Patents
Lithium bromide absorption refrigeration system based on solar energy Download PDFInfo
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- CN215675901U CN215675901U CN202121772670.7U CN202121772670U CN215675901U CN 215675901 U CN215675901 U CN 215675901U CN 202121772670 U CN202121772670 U CN 202121772670U CN 215675901 U CN215675901 U CN 215675901U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The application is a lithium bromide absorption refrigeration system based on solar energy, which belongs to the field of renewable energy refrigeration and comprises a heating tube array arranged in an evaporator, wherein the heating tube array is provided with a liquid inlet and a liquid outlet, and a medium pipeline is connected between the liquid inlet and the liquid outlet of the heating tube array; the first solar heat collector, the first medium pump and the first switch valve are respectively arranged on the medium pipeline; the absorber, the generator and the condenser are sequentially connected in a circulating pipeline from a liquid outlet of the evaporator to a liquid inlet of the evaporator; through setting up first solar collector, utilize first solar collector to realize heating circulation to the heating tubulation in the evaporimeter, utilize the refraction surface of collecting plate to focus sunlight and realize heating the conduction oil of inside on the thermal-collecting tube, the conduction oil heating temperature is high for the evaporation of cryogen in the evaporimeter and refrigerating system's circulation speed, shortens refrigerated reaction time.
Description
Technical Field
The utility model relates to the field of renewable energy refrigeration, in particular to a lithium bromide absorption refrigeration system based on solar energy.
Background
The lithium bromide refrigeration is a process of realizing refrigeration by using a lithium bromide aqueous solution as a working medium, water as a refrigerant, lithium bromide as an absorbent and an external heat source as circulating power, and mainly realizes the purpose of cooling by absorbing refrigerant steam in an evaporator and keeping a low-pressure state in the evaporator according to the lithium bromide to ensure that the refrigerant in the evaporator can be evaporated at a lower temperature. The lithium bromide refrigeration can utilize low-grade heat energy, so the required electric power is small, the refrigerant is water and the lithium bromide solution cannot damage the environment, and particularly, the application of solar energy as low-grade heat energy to the lithium bromide refrigeration is more environment-friendly and energy-saving, so the lithium bromide refrigeration system is unique in the field of central air conditioners and can meet the cold demand of the air conditioners in the power shortage period or the power consumption peak period. Although lithium bromide can utilize low-grade heat energy, if the grade is too low, the refrigeration speed is also influenced, especially in the occasion of frequently starting or stopping refrigeration, the temperature can be reduced for a long time when the refrigeration speed is low, and the reaction time of refrigeration is increased. Therefore, how to increase the speed of the lithium bromide refrigeration system by using low-grade heat energy, especially solar energy, as the power of the refrigeration system cycle is a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
This application is in order to solve in current lithium bromide refrigerating system, it is at the in-process that utilizes lower grade heat energy to realize refrigeration cycle as power, especially this kind of low grade heat energy of solar energy, lead to the lower problem of its refrigeration cycle speed, especially in some occasions of comparatively frequently opening or stopping refrigeration, the initial refrigeration speed is lower and cause the occasion with cold to descend the temperature in longer time, refrigerated reaction time has been increased, this application designs a lithium bromide absorption refrigeration system based on solar energy, its specifically adopted technical scheme is:
a lithium bromide absorption refrigeration system based on solar energy comprising:
the evaporator is internally provided with a heating tube array which is provided with a liquid inlet and a liquid outlet, and a medium pipeline is connected between the liquid inlet and the liquid outlet of the heating tube array;
the first solar thermal collector, the first medium pump and the first switch valve are respectively arranged on the medium pipeline;
the absorption device, the generator and the condenser are sequentially connected in a circulating pipeline from a liquid outlet of the evaporator to a liquid inlet of the evaporator.
Preferably, the medium in the medium pipeline is heat conduction oil.
Preferably, the first solar collector comprises:
the solar collector comprises a light collecting plate and a heat collecting pipe, wherein the light collecting plate is arranged on the light-facing side of the heat collecting pipe, and the light collecting plate is provided with a refraction surface, so that light rays are refracted to the heat collecting pipe through the light collecting plate.
Preferably, a heat accumulator is connected between the first solar heat collector and the liquid inlet of the heating tube array and used for storing solar heat.
Preferably, a heating pipe is arranged in the generator, the heating pipe is provided with a liquid inlet and a liquid outlet, a circulating heating pipeline is connected between the liquid inlet of the heating pipe and the liquid outlet of the heating pipe, and a second solar heat collector, a second medium pump and a second switch valve are respectively arranged on the circulating heating pipeline.
Preferably, the heating medium in the circulating heating pipeline is heat conduction oil.
Preferably, the second solar collector has the same structure as the first solar collector.
Preferably, the absorber is provided with a cooling circulation pipeline, and the cooling medium in the cooling circulation pipeline is cold water.
Preferably, the generator and the absorber are respectively provided with a liquid inlet and a liquid outlet, a liquid conveying pipeline is connected between the liquid outlet of the absorber and the liquid inlet of the generator, a driving pump is connected onto the liquid conveying pipeline, the liquid outlet of the generator is communicated with the liquid inlet of the absorber through a pipeline, the condenser is provided with a liquid inlet and a liquid outlet, the liquid inlet of the condenser is communicated with the generator, and the liquid outlet of the condenser is communicated with the liquid inlet of the evaporator.
According to the utility model, the first solar heat collector is arranged, the heating tube array in the evaporator is heated and circulated by the first solar heat collector, the solar heat collector adopts the heat collecting tube and the light collecting plate, sunlight is focused on the heat collecting tube by utilizing the refraction surface of the light collecting plate to heat the heat conducting oil in the evaporator, the heating temperature of the heat conducting oil is high, the evaporation of a refrigerant in the evaporator can be accelerated, the circulation speed of a refrigerating system is accelerated, the refrigerating reaction time is shortened, and the solar heat collector is especially suitable for occasions with frequent starting or stopping of refrigeration.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a first solar collector;
FIG. 3 is a schematic view of the structure of the light collector panel;
FIG. 4 is an enlarged view taken at I in FIG. 3;
fig. 5 is an enlarged view at II in fig. 3.
In the figure, 1, an evaporator, 2, a heating tube array, 3, a first switch valve, 4, a medium pipeline, 5, a first solar heat collector, 501, a light collecting plate, 502, a heat collecting tube, 503, a refraction surface, 6, a first medium pump, 7, a heat accumulator, 8, a driving pump, 9, a liquid conveying pipeline, 10, an absorber, 11, a cooling circulation pipeline, 12, a switch valve, 13, a pipeline, 14, a second medium pump, 15, a circulation heating pipeline, 16, a second solar heat collector, 17, a second switch valve, 18, a generator, 19 and a condenser.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
In addition, in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1-5, a lithium bromide absorption refrigeration system based on solar energy comprises an evaporator 1, a first solar collector 5, an absorber 10, a generator 18 and a condenser 19. Wherein, the evaporator 1 is internally provided with a cavity, the interior of the evaporator is provided with a heating tube array 2, and besides, the evaporator is also filled with refrigerant, in the application, the refrigerant is water, the heating tube array 2 is provided with a liquid inlet and a liquid outlet, a medium pipeline 4 is connected between the liquid inlet and the liquid outlet of the heating tube array 2, the medium pipeline 4 is connected with a first solar heat collector 5, a first medium pump 6 and a first switch valve 3, the medium in the medium pipeline 4 is heated by the first solar heat collector 5, the first solar heat collector 5 can focus sunlight and intensively heat the medium, can quickly raise the temperature of the medium, accelerate the evaporation of the refrigerant in the evaporator 1, further accelerate the circulation of the whole refrigeration system, shorten the reaction time of refrigeration, for some occasions where the refrigeration is started or stopped frequently, the temperature can be reduced to the required temperature more quickly.
The absorber 10, the generator 18 and the condenser 19 are sequentially connected in a circulation pipeline from a liquid outlet of the evaporator 1 to a liquid inlet of the evaporator 1, that is, the absorber 10 is connected with the evaporator 1, the generator 18 is connected with the absorber 10, and the condenser 19 is connected between the generator 18 and the evaporator 1 to form a circulation pipeline. The absorber 10 absorbs the refrigerant evaporated in the evaporator 1, the absorbent in the absorber 10 is a lithium bromide solution, the lithium bromide belongs to salts, and is easily soluble in water and alcohol, penta-toxic, stable in chemical properties, and can not deteriorate, therefore, the concentrated lithium bromide solution can absorb the refrigerant steam from the evaporator 1, the overhigh pressure in the evaporator 1 is avoided, the inside of the evaporator is always ensured to be in a low-pressure state, the low-pressure state can enable the refrigerant to be evaporated in a lower-temperature state, the evaporator 1 can be enabled to utilize low-grade heat energy, the medium can be heated to a higher temperature due to the existence of the first solar heat collector 5, the refrigerant is rapidly evaporated, the refrigeration cycle process is accelerated, and the refrigeration reaction time is shortened.
Further, in an embodiment, the medium in the medium pipeline 4 is heat conduction oil, and the heat conduction oil is heated at a higher temperature and is heated more quickly, so that in the application, in order to raise the temperature of the refrigerant more quickly and evaporate the refrigerant quickly, the heat conduction oil can achieve a better purpose.
Further, as for the structure of the first solar collector 5, as shown in fig. 2-5, it specifically includes a light collecting plate 501 and a heat collecting pipe 502. The light collecting plate 501 is installed on the light-facing side of the heat collecting tube 502, and the light collecting plate 501 has a refraction surface 503, so that light is refracted to the heat collecting tube 502 through the light collecting plate 501. The heat collecting tube 502 is similar to the glass vacuum tube of the existing solar water heater in structure, but the difference is that the heating medium inside the glass vacuum tube of the solar water heater is water, and the heating medium in the present application is heat conducting oil. In addition, the light collecting plate 501 is arranged on the light-facing side of the heat collecting tube 502, the structure of the light collecting plate 501 is similar to that of a fresnel lens, the light collecting plate 501 collects sunlight on the heat collecting tube 502 (although the focus point does not necessarily fall on the heat collecting tube 502, more collected light is collected on the heat collecting tube 502), the temperature on the heat collecting tube 502 after collection is higher, the temperature rise of heat conducting oil is accelerated, and the temperature of refrigerant is quickly raised and then evaporated along with the temperature rise.
Further, a heat accumulator 7 is connected between the first solar collector 5 and the liquid inlet of the heating tube array 2, the heat accumulator 7 is directly purchased from the market, and the structure of the heat accumulator 7 is mature prior art, so that the structure thereof is not described in detail in the present application. The heat accumulator 7 is used for storing heat, when the sun is sufficient, redundant heat is stored in the heat accumulator 7, when refrigeration is needed, if weather is bad, the heat source generated by the first solar heat collector 5 is not enough to ensure normal operation of lithium bromide refrigeration, and the heat stored in the heat accumulator 7 can be used for supplementing, so that normal operation of the lithium bromide refrigeration is ensured.
Further, in order to prevent the lithium bromide solution in the absorber 10 from reducing its absorption capacity due to dilution after absorbing the refrigerant vapor, the generator 18 is connected to the absorber 10, the dilute solution in the absorber 10 is pumped into the generator 18, and the heating pipe is provided in the generator 18 to evaporate the moisture in the dilute lithium bromide solution, so that the concentration of the lithium bromide solution is increased, and the concentrated lithium bromide solution flows into the absorber 10 again from the generator 18, so that the absorber 10 recovers the absorption capacity.
For the heating of the medium in the heating pipe, it is specific that a circulating heating pipeline 15 is connected between the liquid inlet and the liquid outlet of the heating pipe, and a second solar collector 16, a second medium pump 14 and a second switch valve 17 are respectively arranged on the circulating heating pipeline 15. The second solar heater can accelerate the evaporation speed of the lithium bromide dilute solution, and further accelerate the circulation of the refrigeration system.
In one embodiment, the heating medium in the circulation heating pipeline 15 is also heat conducting oil, the heat conducting oil has high heating speed and low heat dissipation, heat is easily preserved, and meanwhile, the heating temperature of the heat conducting oil is high, so that the purpose of quickly evaporating moisture in the lithium bromide dilute solution can be realized.
Further, the structure of the second solar heat collector 16 is the same as that of the first solar heat collector 5.
Further, in the above-mentioned lithium bromide concentrated solution, after absorbing the refrigerant vapor, the temperature of the lithium bromide concentrated solution rises and the concentration thereof decreases, which inevitably results in a decrease in the absorption capacity of the lithium bromide solution, and in order to improve the absorption capacity of the lithium bromide solution, a cooling circulation pipe 11 is provided in the absorber 10, and the cooling medium in the cooling circulation pipe 11 is cold water, and the cold water can absorb the heat released by liquefaction of the refrigerant vapor, thereby reducing the temperature of the lithium bromide solution and improving the absorption capacity of the lithium bromide solution, which is a method of further improving the absorption capacity of the lithium bromide solution on the basis of the increase in the concentration of the lithium bromide and the improvement in the absorption capacity thereof.
Further, a specific connection mode of the circulation pipeline is that the generator 18 and the absorber 10 are respectively provided with a liquid inlet and a liquid outlet, a liquid conveying pipeline 9 is connected between the liquid outlet of the absorber 10 and the liquid inlet of the generator 18, a driving pump 8 is connected to the liquid conveying pipeline 9, the driving pump 8 can pump the diluted lithium bromide solution in the absorber 10 into the generator 18, the liquid outlet of the generator 18 is communicated with the liquid inlet of the absorber 10 through a pipeline 13, a switch valve 12 is arranged on the pipeline 13, the switch valve 12 controls the on-off of the pipeline 13, when the diluted lithium bromide solution is pumped into the generator 18, the switch valve 12 is closed, after the lithium bromide solution in the generator 18 becomes a concentrated solution, the switch valve 12 is opened, and the concentrated solution in the generator 18 flows into the absorber 10. In addition, the condenser 19 is also provided with a liquid inlet and a liquid outlet, the liquid inlet of the condenser 19 is communicated with the generator 18, the water vapor evaporated in the generator 18 enters the condenser 19, the condenser 19 condenses the entering water vapor into water, and the water flows into the evaporator 1 again through the liquid outlet of the condenser 19, so that the water reduced by continuous evaporation in the evaporator 1 is continuously compensated, and the refrigeration cycle is realized.
The above-described embodiments should not be construed as limiting the scope of the utility model, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (9)
1. A lithium bromide absorption refrigeration system based on solar energy comprising:
the evaporator is internally provided with a heating tube array, the heating tube array is provided with a liquid inlet and a liquid outlet, and a medium pipeline is connected between the liquid inlet and the liquid outlet of the heating tube array;
the solar heat collector, the first medium pump and the first switch valve are respectively arranged on the medium pipeline;
the absorption device, the generator and the condenser are sequentially connected in a circulating pipeline from a liquid outlet of the evaporator to a liquid inlet of the evaporator.
2. The lithium bromide absorption refrigeration system based on solar energy as claimed in claim 1, wherein the medium in the medium pipe is heat conducting oil.
3. A lithium bromide absorption solar-based refrigeration system according to claim 1 or 2 wherein the first solar collector comprises:
the solar collector comprises a light collecting plate and a heat collecting pipe, wherein the light collecting plate is arranged on the light-facing side of the heat collecting pipe, and the light collecting plate is provided with a refraction surface, so that light is refracted to the heat collecting pipe through the light collecting plate.
4. The lithium bromide absorption refrigeration system based on solar energy as claimed in claim 1, wherein a heat accumulator is connected between the first solar heat collector and the liquid inlet of the heating tube array for storing solar heat.
5. The lithium bromide absorption refrigeration system based on solar energy as claimed in claim 1 or 4, wherein the generator is provided with a heating tube therein, the heating tube is provided with a liquid inlet and a liquid outlet, a circulation heating pipeline is connected between the liquid inlet of the heating tube and the liquid outlet of the heating tube, and the circulation heating pipeline is provided with a second solar heat collector, a second medium pump and a second switch valve respectively.
6. The lithium bromide absorption refrigeration system based on solar energy as claimed in claim 5, wherein the heating medium in the circulating heating pipeline is heat conducting oil.
7. A lithium bromide absorption solar-based refrigeration system according to claim 6 wherein the second solar collector has the same structure as the first solar collector.
8. The lithium bromide absorption refrigeration system based on solar energy as claimed in claim 1 or 4, wherein the absorber has a cooling circulation pipeline, and the cooling medium in the cooling circulation pipeline is cold water.
9. The lithium bromide absorption refrigeration system based on solar energy as claimed in claim 1, wherein the generator and the absorber have a liquid inlet and a liquid outlet respectively, a liquid delivery pipe is connected between the liquid outlet of the absorber and the liquid inlet of the generator, a driving pump is connected on the liquid delivery pipe, the liquid outlet of the generator and the liquid inlet of the absorber are communicated through a pipe, the condenser has a liquid inlet and a liquid outlet, the liquid inlet of the condenser is communicated with the generator, and the liquid outlet of the condenser is communicated with the liquid inlet of the evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121772670.7U CN215675901U (en) | 2021-07-30 | 2021-07-30 | Lithium bromide absorption refrigeration system based on solar energy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121772670.7U CN215675901U (en) | 2021-07-30 | 2021-07-30 | Lithium bromide absorption refrigeration system based on solar energy |
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| CN215675901U true CN215675901U (en) | 2022-01-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2915327A1 (en) * | 2022-04-12 | 2022-06-21 | Univ Rovira I Virgili | Water absorption heat pump-lithium-bromide for simultaneous cold and heat production (Machine-translation by Google Translate, not legally binding) |
-
2021
- 2021-07-30 CN CN202121772670.7U patent/CN215675901U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2915327A1 (en) * | 2022-04-12 | 2022-06-21 | Univ Rovira I Virgili | Water absorption heat pump-lithium-bromide for simultaneous cold and heat production (Machine-translation by Google Translate, not legally binding) |
| WO2023198946A1 (en) * | 2022-04-12 | 2023-10-19 | Universitat Rovira I Virgili | Water-lithium bromide absorption heat pump for simultaneously producing heat and cold |
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Effective date of registration: 20220310 Address after: 230001 Zhongfu villager group, qifengling village, yefushan Town, Lujiang County, Hefei City, Anhui Province Patentee after: Fu Yifeng Address before: Room 318, floor 3, building 4-5, No. 4 building, No. 11 courtyard, Lianhuachi Cili, Fengtai District, Beijing 100071 Patentee before: Shangyang energy storage (Beijing) Technology Co.,Ltd. |
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Effective date of registration: 20220512 Address after: 850000 No. 1-01, yard 2, Jianlin rental house, group 1, Nanga village, Dongga Town, duilongdeqing District, Lhasa City, Tibet Autonomous Region Patentee after: Tibet Yuyi Industrial Co.,Ltd. Address before: 230001 Zhongfu villager group, qifengling village, yefushan Town, Lujiang County, Hefei City, Anhui Province Patentee before: Fu Yifeng |
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