CN213454324U - Solar water heating system with temperature control phase change heat storage function - Google Patents
Solar water heating system with temperature control phase change heat storage function Download PDFInfo
- Publication number
- CN213454324U CN213454324U CN202022430087.XU CN202022430087U CN213454324U CN 213454324 U CN213454324 U CN 213454324U CN 202022430087 U CN202022430087 U CN 202022430087U CN 213454324 U CN213454324 U CN 213454324U
- Authority
- CN
- China
- Prior art keywords
- heat
- pipe
- phase change
- liquid phase
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02E10/44—Heat exchange systems
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
In order to solve the problem, the utility model provides a solar water heating system with accuse temperature phase transition heat-retaining function can effectual restriction heat pipe collector in the medium temperature, avoids solar water heating system high temperature to bring the security problem. The heat collecting pipe group comprises a plurality of metal heat pipe units which are arranged side by side, a gas-liquid phase change material is filled in a pipe cavity of each metal heat pipe unit, the phase change temperature of the gas-liquid phase change material is 80-85 ℃, and the front end of each metal heat pipe unit extends into the runner pipe and forms an extension section; the heat storage water tank is sequentially provided with a shell, a polyurethane heat insulation layer and an inner container from outside to inside, the inner container is provided with a medium heat exchange tube and a water heat exchange tube, solid-liquid phase-change materials are filled in the inner container, and the phase change temperature of the solid-liquid phase-change materials is 50-55 ℃.
Description
Technical Field
The utility model belongs to the technical field of solar energy, concretely relates to solar water heating system with accuse temperature phase transition heat-retaining function.
Background
Solar energy is a green clean renewable energy source, is the most abundant energy source which can be applied by human beings, is widely applied in the world, and plays a great role in providing hot water supply, improving the living standard of people, reducing the conventional energy consumption and the like. However, solar energy has the characteristics of low energy flux density, uneven distribution of energy in time and space, and the like.
In the known technology, the existing solar water heating system mainly comprises a heat collector, a water tank, a pump station, a circulating pipeline and a control system; the water tank arranged indoors is connected with the pump station through an inlet and outlet circulating pipeline, the heat collector arranged outdoors is connected with the pump station through the inlet and outlet circulating pipeline, a ball valve is arranged on the inlet and outlet circulating pipeline between the heat collector and the pump station, and the expansion water tank is connected with the pump station through a pipeline, so that the problem of expansion with heat and contraction with cold of circulating liquid in the device is effectively solved; the heat collector, the pump station, the expansion water tank and the heat exchanger in the water tank form independent closed circulation through the inlet and outlet circulation pipelines, so that the heating medium is separated from the heated water, and the sanitary quality of the heated water is ensured; meanwhile, the system adopts a pump station with control logic, so that the system is high in thermal performance and high in use comfort.
However, after years of actual installation and use of the system, if a user goes out for a long time and does not use hot water in the hot water storage tank, the temperature difference between the hot water storage tank and a circulating medium is smaller and smaller, but the heat collector still works to absorb solar heat, the temperature of the heat collection unit exceeds 100 ℃ and even reaches 235 ℃ and above, so that the temperature of the medium in the circulating pipeline reaches above 120 ℃, the temperature of the hot water storage tank reaches above 100 ℃, the pressure in the hot water system is increased, the requirement of a system safety device (95 ℃ and 0.8 MPa) is met, the safety device opens the pressure relief spray, the smell of the circulating medium is unpleasant, and meanwhile, the medium in the system is less and less due to the repeated opening of the pressure relief spray, so that the safety performance and the service life of the system and the pipeline are greatly reduced; meanwhile, the medium is in a high-temperature state of 120 ℃ for a long time, so that carbonization reaction is easy to occur, a heat collection unit is blocked, and the heat exchange efficiency is reduced; meanwhile, when the circulating medium reaches 120 ℃, a high-temperature protection function of the solar water heating system is triggered, so that a pump station and a system are shut down, a user cannot obtain required hot water when using the solar water heating system again and can only report the required hot water for repair, the user experience is reduced, and the after-sale workload is increased; meanwhile, the common pressure-bearing water tank is filled with water, and the problems of easy generation of bacteria, peculiar smell and the like do not need to be solved for a long time, so that the water quality is poor and the water tank is unsanitary.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a solar water heating system with accuse temperature phase transition heat-retaining function can effectual restriction heat pipe collector in the medium temperature, avoids solar water heating system high temperature to bring the security problem.
The utility model discloses a realize through following technical scheme:
a solar water heating system with temperature control phase change heat storage function comprises a heat pipe heat collector and a heat storage water tank, wherein the heat pipe heat collector comprises a heat collecting pipe set and a header, a runner pipe is arranged in the header, and the front end of the heat collecting pipe set is fixedly arranged on the side wall of the header;
the heat collecting pipe group comprises a plurality of metal heat pipe units which are arranged side by side, a gas-liquid phase change material is filled in a pipe cavity of each metal heat pipe unit, the phase change temperature of the gas-liquid phase change material is 80-85 ℃, and the front end of each metal heat pipe unit extends into the runner pipe and forms an extension section;
the heat storage water tank sequentially comprises a shell, a polyurethane heat insulation layer and an inner container from outside to inside, the inner container is provided with a medium heat exchange tube and a water heat exchange tube, the inner container is filled with a solid-liquid phase change material, and the phase change temperature of the solid-liquid phase change material is 50-55 ℃;
a medium inlet and a medium outlet of the medium heat exchange pipe extend to the outside of the heat storage water tank and are circularly communicated with an inlet and an outlet of the runner pipe through a medium circulating pipeline; and the water inlet and the water outlet of the water heat exchange pipe extend to the outside of the heat storage water tank and are communicated with the water using end through a water circulating pipeline.
Furthermore, the medium heat exchange tube and the water heat exchange tube are both metal tubes which are spirally distributed, and the length of the water heat exchange tube is 2-4 times that of the medium heat exchange tube.
Furthermore, a vacuum glass tube is sleeved outside the metal heat pipe unit to form a vacuum interlayer cavity, a solar selective absorption coating is coated on the vacuum glass tube, the metal heat pipe unit is fixed in the vacuum glass tube through heat conduction fins distributed spirally, a CPC reflector is arranged below the heat collection pipe group, and the header and the runner tube are filled and fixed by heat insulation rock wool.
Furthermore, an expansion water tank and a pump station are arranged on the medium circulating pipeline.
Furthermore, the metal heat pipe unit is made of aluminum, and the gas-liquid phase change material is prepared by blending ethanol, ethylene glycol and water; the solid-liquid phase change material is a high-density polyethylene material.
Further, the solid-liquid phase-change material occupies 4/5-5/6 of the inner container volume.
Compared with the prior art, the utility model the beneficial effect who gains as follows:
1. the metal heat pipe unit is filled with gas-liquid phase change material, the phase change temperature of the gas-liquid phase change material is 80-85 ℃, and the maximum temperature of phase change to gas state after heat absorption is 95 ℃. After the metal heat pipe unit absorbs heat, the gas-liquid phase change material is heated, the liquid is in an initial state, the gas-liquid phase change material absorbs heat in a sensible heat mode, when the temperature of the gas-liquid phase change material reaches a phase change temperature, the heat absorption mode is changed from sensible heat to latent heat, a circulating medium in a flow channel pipe absorbs a large amount of heat after passing through an eye nerve section of the metal heat pipe unit, so that the temperature of the gas-liquid phase change material is rapidly reduced, and the gas-liquid phase change material; the highest temperature of the phase change gas state of the gas-liquid phase change material is 95 ℃, because of factors such as heat conduction and heat dissipation loss, the temperature of the circulating medium does not exceed 90 ℃, and the circulating medium is transferred to the solid-liquid phase change material in the heat storage water tank through the medium circulating pipeline for storage; the phase change temperature of the solid-liquid phase change material is 50-55 ℃, the highest temperature of the solid-liquid phase change material which changes into a liquid state after heat absorption is 75 ℃, the solid-liquid phase change material is heated after the medium heat exchange tube absorbs heat, the solid-liquid phase change material is in a solid state at first, heat is absorbed in a sensible heat mode, when the temperature of the solid-liquid phase change material reaches the phase change temperature, the heat absorption mode is changed from sensible heat to latent heat, and energy is stored in the solid-liquid phase change; the domestic water absorbs a large amount of heat after passing through the water heat exchange pipe, so that the temperature of the solid-liquid phase change material is reduced, and the domestic water enters a liquid sensible heat absorption state again; the highest temperature of the phase change gas state of the solid-liquid phase change material is 75 ℃; therefore, the safety problem caused by overhigh temperature of the hot water system can be effectively avoided;
the above two phase change materials are relatively stable after reaching the maximum temperature. The two phase-change materials are matched, so that the effects of storing a large amount of heat and controlling temperature are realized. Because the latent heat density of the two phase-change materials is 5-10 times or even higher than that of sensible heat, even in summer with the highest solar irradiation, the temperature in the hot water storage tank cannot exceed 80 ℃, and the situation of automatic pressure relief and liquid spraying protection when the system is shut down cannot occur. Therefore, safety problems of overheating, pressure relief, liquid spraying, system shutdown and the like caused by overhigh temperature of the hot water system can be effectively avoided;
2. solid-liquid phase change materials are filled in the heat storage water tank to replace water in the prior art, so that a large amount of heat can be stored, and the phenomenon that water in the water tank is deteriorated and pollutes bacteria and grows for a long time can be avoided, so that the solar water heating system is healthier;
3. the medium heat exchange tube and the water heat exchange tube are both metal tubes which are spirally distributed, so that the solid-liquid phase change material can be fully contacted with the medium heat exchange tube for heat exchange, and the heat exchange efficiency is improved;
4. the utility model discloses compact structure, it is safe in utilization, be worth wideling popularize in the solar water heating system field.
Drawings
Fig. 1 is a schematic structural view of a solar water heating system according to the present invention;
FIG. 2 is a schematic view of the internal structure of the heat pipe collector of the present invention;
fig. 3 is a schematic view of the internal structure of the heat storage water tank of the present invention;
in the figure, the heat pipe heat collector 1, a heat pipe heat collector 11, a header 12, a metal heat pipe unit 13, a gas-liquid phase change material 14, an extension section 15, a vacuum glass pipe 2, a heat storage water tank 21, an inner container 22, a solid-liquid phase change material 23, a medium heat exchange pipe 24, a water heat exchange pipe 3, a medium circulation pipeline 4, an expansion water tank 5 and a pump station.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1, the embodiment discloses a solar water heating system with temperature control and phase change heat storage functions, which mainly comprises a heat pipe collector 1, a heat storage water tank 2, a medium circulation pipeline 3, an expansion water tank 4 and a pump station 5.
As shown in fig. 2, the heat pipe collector 1 includes a heat collecting pipe group and a header 11, a runner pipe made of metal is provided in the header 11, and a front end of the heat collecting pipe group is fixedly mounted on a side wall of the header 11. The heat collecting pipe group comprises a plurality of metal heat pipe units 12 which are arranged side by side, a pipe cavity of each metal heat pipe unit 12 is filled with a gas-liquid phase change material 13, the phase change temperature of the gas-liquid phase change material 13 is 80-85 ℃, and the front end of each metal heat pipe unit 12 extends into the flow passage pipe and forms an extension section 14. The metal heat pipe unit 12 is externally sleeved with a vacuum glass pipe 15 to form a vacuum interlayer cavity, a solar selective absorption coating is coated on the vacuum glass pipe 15, the metal heat pipe unit 12 is fixed in the vacuum glass pipe 15 through heat conduction fins distributed spirally, a CPC reflector is arranged below the heat collection pipe group, and the header 11 and the runner pipe are filled and fixed by heat insulation rock wool. By the design, the heat pipe heat collector 1 can fully absorb heat and preserve heat, and the solar energy is fully absorbed and utilized.
As shown in fig. 3, the heat storage water tank 2 is composed of a shell, a polyurethane heat insulation layer and an enamel inner container 21 from outside to inside in sequence, the inner container 21 is provided with a medium heat exchange tube 23 and a water heat exchange tube 24, the inner container 21 is filled with a solid-liquid phase change material 22, and the phase change temperature of the solid-liquid phase change material 22 is 50-55 ℃. The heat exchange tube and the water heat exchange tube 24 are spirally distributed metal tubes, the length of the water heat exchange tube 24 is 3 times that of the medium heat exchange tube 23, and a medium inlet and a medium outlet of the medium heat exchange tube 23 extend to the outside of the heat storage water tank 2 and are communicated with an inlet and an outlet of the flow channel tube through a medium circulation pipeline 3 in a circulating manner. An expansion water tank 4 and a pump station 5 are arranged on the medium circulation pipeline 3, so that the medium can be circulated between the heat storage water tank 2 and the heat pipe collector 1. The water inlet and the water outlet of the water heat exchange pipe 24 extend to the outside of the heat storage water tank 2 and are communicated with the water using end through a water circulating pipeline.
In this embodiment, the gas-liquid phase change material is prepared by blending ethanol, ethylene glycol and water, and the solid-liquid phase change material is a high-density polyethylene material, which are conventional phase change materials, and other known phase change materials may be adopted according to the selection.
The concrete working principle of solar water heating system as follows:
after absorbing heat, the metal heat pipe unit 12 of the heat pipe collector 1 heats the gas-liquid phase change material 13, the liquid is in an initial state, the liquid absorbs heat in a sensible heat mode, when the temperature of the gas-liquid phase change material 13 reaches a phase change temperature, the heat absorption mode is changed from sensible heat to latent heat, a circulating medium in a runner pipe absorbs a large amount of heat after passing through an eye nerve section of the metal heat pipe unit 12, so that the temperature of the gas-liquid phase change material 13 is rapidly reduced, and the gas-liquid phase change material enters a liquid sensible heat; because the highest temperature of the phase change gas state of the gas-liquid phase change material 13 is 95 ℃, the temperature of the circulating medium cannot exceed 90 ℃ due to factors such as heat conduction and heat dissipation loss and the like. Circulating media enter the medium heat exchange tube 23 through the medium circulating pipeline 3, and medium heat in the medium heat exchange tube 23 is transferred to the solid-liquid phase change material 22 in the heat storage water tank 2 for storage; the phase change temperature of the solid-liquid phase-change material 22 is 50 ℃ to 55 ℃, the maximum temperature of phase change to liquid after heat absorption is 75 ℃, the medium heat exchange tube 23 heats the solid-liquid phase-change material 22 after absorbing heat, the solid phase-change material is solid at the beginning and absorbs heat in a sensible heat mode, when the temperature of the solid-liquid phase-change material 22 reaches the phase change temperature, the heat absorption mode is changed from sensible heat to latent heat, and energy is stored in the solid-liquid phase-change material 22; the domestic water absorbs a large amount of heat after passing through the water heat exchange pipe 24, so that the temperature of the solid-liquid phase change material 22 is reduced, and the domestic water enters a liquid sensible heat absorption state again; the maximum temperature of the gas phase is 75 deg.c due to the phase change of the solid-liquid phase-change material 22. If a user goes out for a long time, the two phase-change materials are relatively stable after reaching the highest temperature. The two phase-change materials are matched, so that the effects of storing a large amount of heat and controlling temperature are realized. Because the latent heat density of the two phase-change materials is 5-10 times or even higher than that of sensible heat, even in summer with the highest solar irradiation, the temperature in the heat storage water tank 2 does not exceed 80 ℃, and the situation of automatic pressure relief and liquid spraying protection when the system is shut down does not occur. Therefore, the safety problems of overheating, pressure relief, liquid spraying, system shutdown and the like caused by overhigh temperature of the hot water system can be effectively avoided.
Claims (5)
1. A solar water heating system with temperature control phase change heat storage function comprises a heat pipe collector and a heat storage water tank, and is characterized in that,
the heat pipe collector comprises a heat collecting pipe group and a header, a runner pipe is arranged in the header, and the front end of the heat collecting pipe group is fixedly arranged on the side wall of the header;
the heat collecting pipe group comprises a plurality of metal heat pipe units which are arranged side by side, a gas-liquid phase change material is filled in a pipe cavity of each metal heat pipe unit, the phase change temperature of the gas-liquid phase change material is 80-85 ℃, and the front end of each metal heat pipe unit extends into the runner pipe and forms an extension section;
the heat storage water tank sequentially comprises a shell, a polyurethane heat insulation layer and an inner container from outside to inside, the inner container is provided with a medium heat exchange tube and a water heat exchange tube, the inner container is filled with a solid-liquid phase change material, and the phase change temperature of the solid-liquid phase change material is 50-55 ℃;
a medium inlet and a medium outlet of the medium heat exchange pipe extend to the outside of the heat storage water tank and are circularly communicated with an inlet and an outlet of the runner pipe through a medium circulating pipeline; and the water inlet and the water outlet of the water heat exchange pipe extend to the outside of the heat storage water tank and are communicated with the water using end through a water circulating pipeline.
2. The solar water heating system of claim 1, wherein the medium heat exchange pipe and the water heat exchange pipe are metal pipes distributed spirally, and the length of the water heat exchange pipe is 2-4 times that of the medium heat exchange pipe.
3. The solar water heating system according to claim 1, wherein a vacuum glass tube is sleeved outside the metal heat pipe unit to form a vacuum interlayer cavity, a solar selective absorption coating is coated on the vacuum glass tube, the metal heat pipe unit is fixed in the vacuum glass tube through heat conduction fins distributed spirally, a CPC reflector is arranged below the heat collection pipe set, and the header and the runner pipe are filled and fixed by heat preservation rock wool.
4. A solar water heating system according to claim 1, wherein an expansion tank and a pump station are provided on the medium circulation line.
5. A solar water heating system as claimed in any one of claims 1 to 4, wherein the solid-liquid phase change material occupies 4/5-5/6 of the volume of the inner container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022430087.XU CN213454324U (en) | 2020-10-28 | 2020-10-28 | Solar water heating system with temperature control phase change heat storage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022430087.XU CN213454324U (en) | 2020-10-28 | 2020-10-28 | Solar water heating system with temperature control phase change heat storage function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213454324U true CN213454324U (en) | 2021-06-15 |
Family
ID=76295878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022430087.XU Active CN213454324U (en) | 2020-10-28 | 2020-10-28 | Solar water heating system with temperature control phase change heat storage function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213454324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178953A (en) * | 2020-10-28 | 2021-01-05 | 山东力诺瑞特新能源有限公司 | Solar water heating system with temperature control phase change heat storage function |
-
2020
- 2020-10-28 CN CN202022430087.XU patent/CN213454324U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178953A (en) * | 2020-10-28 | 2021-01-05 | 山东力诺瑞特新能源有限公司 | Solar water heating system with temperature control phase change heat storage function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201322463Y (en) | Solar phase-change thermal storage water heater | |
| WO2018161508A1 (en) | System for peak load regulation of thermal power plant by combining cross-season heat storage of natural water and electrode boiler | |
| CN106440397A (en) | Seasonal underground compound heat storage system | |
| CN210832580U (en) | Phase-change temperature-control vacuum tube explosion-proof synergistic water heater | |
| CN107436055A (en) | A kind of solar cross-season energy storage combined supply system | |
| CN213454324U (en) | Solar water heating system with temperature control phase change heat storage function | |
| CN105864870B (en) | Multipot type solar energy heating system | |
| CN102192608B (en) | Carbon nanotube heat-exchange working medium solar water heater | |
| CN201973897U (en) | Split solar water heater taking gas as working medium | |
| CN104697184B (en) | Phase-change thermal storage type solar water heater | |
| CN209639285U (en) | A kind of dish-style power generator based on V-type heat absorption wall cavity-type solar absorber | |
| CN101149190A (en) | Vacuum tube direct-insertion type solar hot water system | |
| CN111795506A (en) | Heat collecting pipe unit and heat collecting temperature control phase change capacity increasing solar water heating system | |
| CN101373103B (en) | High-efficiency energy-saving multipurpose solar water heater | |
| CN112178953A (en) | Solar water heating system with temperature control phase change heat storage function | |
| CN207350993U (en) | A kind of solar cross-season energy storage combined supply system | |
| CN215523785U (en) | New energy storage and conversion comprehensive application system | |
| CN205048753U (en) | Solar thermal energy utilizes device | |
| CN213335009U (en) | Solar energy and air source heat pump combined heating and water heating system | |
| CN105042908B (en) | Mix runner economic benefits and social benefits solar energy heating plate core and heat collector | |
| CN203719163U (en) | Phase-change heat storage type solar water heater structure | |
| CN203719161U (en) | Phase-change heat storage type water heater structure | |
| CN210220253U (en) | Pressure-bearing split solar heat collector | |
| CN212566340U (en) | Heat collecting pipe unit and heat collecting temperature control phase change capacity increasing solar water heating system | |
| CN206310590U (en) | Double heat source heat pump and thirdly media heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |