CN109114657A - Force the regenerative apparatus of layering - Google Patents
Force the regenerative apparatus of layering Download PDFInfo
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- CN109114657A CN109114657A CN201811198191.1A CN201811198191A CN109114657A CN 109114657 A CN109114657 A CN 109114657A CN 201811198191 A CN201811198191 A CN 201811198191A CN 109114657 A CN109114657 A CN 109114657A
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- water
- heat storage
- heat
- forced
- storage device
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- 230000001172 regenerating effect Effects 0.000 title abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 318
- 238000005338 heat storage Methods 0.000 claims abstract description 180
- 238000007667 floating Methods 0.000 claims description 62
- 238000003860 storage Methods 0.000 claims description 35
- 238000009826 distribution Methods 0.000 claims description 18
- 238000013517 stratification Methods 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000004321 preservation Methods 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract 1
- 230000009182 swimming Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000013519 translation Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000007142 ring opening reaction Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D20/0039—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material with stratification of the heat storage material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/10—Heat storage materials, e.g. phase change materials or static water enclosed in a space
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of regenerative apparatus of forced layering, it include: shell, the first water distributor and the second water distributor, the kickboard for being suitable for swimming in heat storage medium is equipped in shell, kickboard is vertically movably assembled relative to the internal perisporium of shell, accommodating chamber is divided into the first warm area and the second warm area by kickboard, the density of kickboard is greater than the density of the heat storage medium of the first warm area and less than the density of the second warm area heat storage medium, first water distributor is set to the first warm area, and for being connected to hot-water line, second water distributor is set to the second warm area, and for being connected to cold water pipe.The regenerative apparatus of forced layering of the invention, by the way that kickboard is arranged, to effectively inhibit the mixing of high-temperature heat accumulation medium and low-temperature heat accumulating medium in regenerative apparatus, reduce thermocline thickness, to improve the heat storage efficiency of regenerative apparatus, and kickboard no setting is required active equipment, stable and reliable operation, at low cost, follow-up maintenance is simple.
Description
Technical Field
The invention relates to the technical field of heat storage, in particular to a forced layering heat storage device.
Background
The water heat storage technology stores heat energy by using sensible heat of water, stores the heat in a heat storage device in a heat storage stage, releases the heat to a heat user in a heat supply stage, is applicable to heat storage systems of renewable energy sources such as thermal power flexibility transformation, cogeneration, wind and light elimination and elimination, solar energy utilization, industrial waste heat utilization and the like, and has important significance in improving energy utilization efficiency, balancing heat energy supply and demand and protecting the environment.
The heat storage device in the water heat storage technology usually adopts a naturally layered heat storage device, cold and hot water in the heat storage device generates gravity flow (density flow) due to density difference rather than inertia effect to form a thermocline (transition layer between cold and hot fluids) with small cold and hot water mixing effect and thin thickness, the upper part of the thermocline is hot water, the lower part of the thermocline is cold water, and heat storage and heat release are realized through the up-and-down translation movement of the naturally layered hot water and cold water. During heat storage, hot water heated by the heat source enters the heat storage device through the upper water distributor, and cold water at the bottom is discharged to the heat source for heating. When heat is released, hot water is discharged to a heat user through the upper water distributor for supplying heat, and return water with lower temperature at the outlet of the heat user enters the heat storage device through the lower water distributor.
In order to reduce the influence of the inflow water in the thermal storage device on natural stratification, upper and lower water distributors are generally arranged in the thermal storage device, and the water flow is required to flow into the water tank at a lower and uniform flow rate, so that the disturbance of the inflow water to the water in the thermal storage device and the damage to the thermocline are reduced.
In the multi-coil water distributor in the related technology, firstly, the water distributor distributes water along the axial direction of the tank body, and the disturbance of the water distribution mode to the whole tank body is serious; secondly, the water distributor is provided with holes on the water distribution pipes, the water distribution area of each circle of water distribution pipes is ensured to be equal through unequal hole opening intervals of each circle of water distribution pipes, so that the outlet of the water distributor is approximately uniform and low-speed flow is realized, but the hole opening mode can cause difficulty in processing the water distribution pipes and difficulty in volume production, the outer ring opening interval is large, the waste of the water distribution pipes is caused, the outer ring opening interval is larger than that of the inner ring, the outlet flow of holes between the inner ring and the outer ring is locally uneven, up-and-down translation density flow cannot be formed in the heat storage device, the thickness of an inclined temperature layer is thickened, and the efficiency of the heat storage.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the present invention to provide a thermal storage device with forced stratification for uniform distribution of the inlet water flow.
According to an embodiment of the present invention, a forced-stratification heat storage device includes: the shell is used for limiting an accommodating cavity for accommodating a heat storage medium, a floating plate suitable for floating in the heat storage medium is arranged in the shell and movably assembled along the vertical direction relative to the inner peripheral wall of the shell, the accommodating cavity is divided into a first temperature zone located above the floating plate and a second temperature zone located below the floating plate by the floating plate, the first temperature zone is communicated with the second temperature zone, and the density of the floating plate is greater than that of the heat storage medium in the first temperature zone and less than that of the heat storage medium in the second temperature zone; the first water distributor is arranged in the first temperature zone and is used for being communicated with a hot water pipe; the second water distributor is arranged in the second temperature zone and is used for being communicated with the cold water pipe; the temperature of the heat storage medium in the first temperature zone is set to be higher than that of the heat storage medium in the second temperature zone during operation, so that the density of the heat storage medium in the first temperature zone is lower than that of the heat storage medium in the second temperature zone.
According to the forced layering heat storage device, the floating plate is arranged, so that the accommodating cavity of the heat storage device is divided into the first temperature area and the second temperature area, mixing of a high-temperature heat storage medium and a low-temperature heat storage medium in the heat storage device is effectively inhibited, the thickness of the inclined temperature layer is reduced, the heat storage efficiency of the heat storage device is improved, active equipment does not need to be arranged on the floating plate, and the forced layering heat storage device is stable and reliable in operation, low in cost and simple in subsequent maintenance.
According to the forced stratified thermal storage device of one embodiment of the present invention, a gap is provided between the floating plate and the inner peripheral wall of the case to communicate the first temperature zone with the second temperature zone.
According to the forced stratification heat storage device of one embodiment of the present invention, the density of the floating plate is ρ, and satisfies: 950kg/m3≤ρ≤990kg/m3。
According to the forced stratified thermal storage device of one embodiment of the present invention, the accommodation chamber has a circular cross section, and the floating plate has a disk shape.
According to a forced stratified thermal storage apparatus of an embodiment of the present invention, the case includes: outer heat preservation and interior heat preservation, outer heat preservation cover in outside the interior heat preservation, interior heat preservation is injectd and is held the chamber.
According to the forced stratification heat storage device provided by the embodiment of the invention, the first water distributor and the second water distributor are both disc-type water distributors, the axial ends of the first water distributor and the second water distributor are provided with pipe connectors respectively communicated with the hot water pipes and the cold water pipes, and the radial sides of the first water distributor and the second water distributor are provided with radially outward water distribution ports.
According to the forced stratification heat storage device provided by the embodiment of the invention, the pipe joint of the first water distributor is arranged at the upper end of the first water distributor, and the pipe joint of the second water distributor is arranged at the lower end of the second water distributor.
According to the forced stratification heat storage device provided by the embodiment of the invention, the pipe interface of the first water distributor is provided with a first diffuser with the inner diameter gradually increasing from top to bottom, and the pipe interface of the second water distributor is provided with a second diffuser with the inner diameter gradually increasing from bottom to top.
According to the forced stratified thermal storage device of one embodiment of the present invention, each of the first water distributor and the second water distributor includes: the water distribution device comprises baffles and a bottom plate which are oppositely arranged at intervals along the vertical direction, the pipe joints are arranged on the baffles, and the water distribution ports are arranged between the baffles and the bottom plate.
According to the forced stratified thermal storage apparatus of one embodiment of the present invention, the diameter of the baffle plate is equal to the diameter of the base plate, and the baffle plate is arranged in a center with the base plate.
According to the forced stratified thermal storage device of one embodiment of the present invention, each of the first water distributor and the second water distributor includes: a plurality of baffles disposed circumferentially spaced apart along the tube interface, the baffles connected between the baffle plate and the bottom plate and the baffles extending in a radial direction.
According to the forced stratification heat storage device of one embodiment of the present invention, the radially inner end of the partition plate extends to the rim of the pipe joint, and the radially outer end of the partition plate extends to the outer peripheral rim of the bottom plate.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a thermal storage device in communication with a thermal storage system according to an embodiment of the present invention;
fig. 2 and 3 are sectional views of a first water distributor according to an embodiment of the present invention.
Reference numerals:
the system comprises a heat source 1, an accommodating cavity 2, a heat source outlet valve 3, a hot water valve 4, a hot water pipe 5, a first water distributor 6a, a second water distributor 6b, an inner wall layer 8, an outer heat insulation layer 9, a cold water pipe 10, a cold water valve 11, a heat storage circulating pump 12, a heat consumer 13, a heat release circulating pump 14, a steam valve 15, a safety valve 16, an overflow valve 17, a blow-down valve 18, a hot water outlet temperature measuring point 19, a cold water outlet temperature measuring point 20, an intelligent controller 21, a first diffuser 61a, a baffle 62, a bottom plate 63, a partition plate 64, a pipe joint 65, a floating plate 7 and a first temperature zone 81; a second temperature zone 82.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A thermal storage system according to an embodiment of the invention is described below with reference to fig. 1 to 3.
As shown in fig. 1, the thermal storage system of the embodiment of the invention includes: the system comprises a heat source 1, a heat source outlet valve 3, a hot water valve 4, a hot water pipe 5, a cold water pipe 10, a cold water valve 11, a heat storage circulating pump 12, a heat consumer 13, a heat release circulating pump 14, a steam valve 15, a safety valve 16, an overflow valve 17, a blowdown valve 18 and a heat storage device.
The water outlet end of the heat source 1 is connected with the first water distributor 6a through the hot water pipe 5, the water return end of the heat source 1 is connected with the second water distributor 6b through the cold water pipe 10, the water inlet end of the heat consumer 13 is connected with the water outlet end of the heat source 1, and the water outlet end of the heat consumer 13 is connected with the water return end of the heat source 1. In other words, the thermal storage device and the thermal user 13 are connected in parallel between the water outlet end and the water return end of the heat source 1. The first water distributor 6a can be selectively connected with the water outlet end of the heat source 1, the second water distributor 6b can be selectively connected with the water return end of the heat source 1, the water inlet end of the heat consumer 13 can be selectively connected with the water outlet end of the heat source 1, the water outlet end of the heat consumer 13 can be selectively connected with the water return end of the heat source 1, the water inlet end of the heat consumer 13 can be selectively connected with the first water distributor 6a, and the water outlet end of the heat consumer 13 can be selectively connected with the second water distributor 6 b.
The heat source 1 can heat the return water to supply hot water to the water outlet end, and the heat source 1 converts electric energy, heat energy of steam of a power plant or solar energy into heat energy of water. The heat source 1 may include a boiler, a solar heat collector, and other heating devices, may also include a steam-water heat exchange device, and may also be derived from valley electricity of thermal power, cogeneration, renewable energy sources such as wind and light waste, solar energy utilization, industrial waste heat, and the like. The heat consumer 13 may be a heating consumer or the like.
In some embodiments, the water outlet end of the heat source 1 is provided with a heat source outlet valve 3, the heat source outlet valve 3 can be an electric regulating valve for regulating the total flow of hot water from the outlet of the heat source 1, the water return end of the heat source 1 is provided with a heat storage circulating pump 12, the heat storage circulating pump 12 is used for pressurizing the return water, and the heat storage device and the heat user 13 are connected in parallel between the heat source outlet valve 3 and the heat storage circulating pump 12. The first water distributor 6a is connected with the heat source outlet valve 3 through a hot water pipe 5, the hot water pipe 5 is provided with a hot water valve 4, the hot water valve 4 is an electric regulating valve, and the flow of the hot water entering the heat storage device is regulated according to the required heat storage amount/heat storage power of the heat storage device. The second water distributor 6b is connected with a water inlet of a heat storage circulating pump 12 through a cold water pipe 10, the cold water pipe 10 is provided with a cold water valve 11, the cold water valve 11 is an electric regulating valve, and according to the requirements of heat storage amount and heat storage power, the heat source outlet valve 3 and the hot water valve 4 control the flow and the liquid level of hot water. When the heat storage device is filled with hot water, the maximum height of the liquid level does not exceed the limit. The water outlet end of the heat consumer 13 can be provided with a heat release circulating pump 14, hot water becomes return water after heat exchange of the heat consumer 13, and the return water is pressurized through the heat release circulating pump 14.
The top of the heat storage device is provided with a steam valve 15, and the steam valve 15 is used for controlling the steam flow entering the heat storage device and the pressure in the tank; the top of the heat storage device is provided with a safety valve 16, and the safety valve 16 is used for automatically discharging the pressure in the heat storage device to the atmosphere when the pressure in the heat storage device exceeds a limit value; the upper part of the heat storage device is provided with an overflow valve 17, and when the liquid level exceeds a limit value, the overflow is carried out; the bottom of the heat storage device is provided with a blow-down valve 18 for blow-down before starting and during operation.
In the heat storage stage of the heat storage device, water is heated by the heat source 1, flows through the hot water pipe 5, the hot water valve 4 and the first water distributor 6a, flows into the heat storage device, and along with the inflow of hot water in the heat storage stage, a high-temperature hot water area in the heat storage device is thickened, an inclined temperature layer moves downwards, cold water at the bottom of the heat storage device flows out, and flows back to the heat source 1 after being pressurized by the cold water pipe 10 and the heat storage circulating pump 12 to be continuously heated.
In the heat release phase of the heat storage device, hot water flows into the heat consumer 13 through the hot water pipe 5 and the hot water valve 4, and the heat exchanger of the heat consumer 13 can be a water-water heat exchanger or a water-air heat exchanger. The hot water becomes return water after heat exchange by the hot user 13, the return water is pressurized by the heat release circulating pump 14 and flows into the heat storage device through the cold water pipe 10, the cold water valve 11 and the second water distributor 6b, and the flow rate of the return water is adjusted by the cold water valve 11.
A thermal storage device according to an embodiment of the invention is described below with reference to fig. 1 to 3.
As shown in fig. 1, the thermal storage device includes: a shell, a first water distributor 6a and a second water distributor 6 b.
The housing defines a receiving chamber 2 for receiving a heat storage medium, which may be water, and may include: the outer heat-insulation layer 9 and the inner wall layer 8, the outer heat-insulation layer 9 covers the outer side of the inner wall layer 8, the inner wall layer 8 defines the accommodating cavity 2, and the inner wall layer 8 can be made of stainless steel; the outer heat-insulating layer 9 is made of a heat-insulating material with the upper limit temperature higher than 110 ℃, the heat conductivity coefficient less than 0.05W/(mK) and high thermal stability.
The floating plate 7 is arranged in the shell and is suitable for floating in the heat storage medium, the floating plate 7 is movably assembled in the vertical direction relative to the inner peripheral wall of the shell, the accommodating cavity 2 is divided into a first temperature zone 81 located above the floating plate 7 and a second temperature zone 82 located below the floating plate 7 by the floating plate 7, the first temperature zone 81 is communicated with the second temperature zone 82 so that the floating plate 7 can float in the accommodating cavity 2 conveniently, and the density of the floating plate 7 is greater than that of the heat storage medium in the first temperature zone 81 and less than that of the heat storage medium in the second temperature zone 82.
For example, when the heat storage medium is water, hot water and cold water in the accommodating cavity 2 can form layering in the accommodating cavity 2 due to different densities, that is, the density of the hot water is lower than that of the accommodating cavity 2, the density of the cold water is higher than that of the accommodating cavity 2, and an inclined temperature layer with a certain thickness can be formed between the hot water and the cold water, that is, the upper part of the inclined temperature layer is the hot water, and the lower part of the inclined temperature layer is the cold water.
The floating plate 7 is movably installed in the accommodating cavity 2, the accommodating cavity 2 is divided into a first temperature area 81 and a second temperature area 82, the density of the floating plate 7 is greater than that of a heat storage medium of the first temperature area 81 and less than that of the heat storage medium of the second temperature area 82, namely, the density of the floating plate 7 is greater than that of hot water at the upper end of the floating plate 7, the density of the floating plate 7 is less than that of cold water at the lower end of the floating plate 7, the hot water is stored in the first temperature area 81 above the floating plate 7, and the cold water is stored in the second temperature area 82 at the lower end of the floating plate 7.
Thus, the density of the floating plate 7 is greater than that of the heat storage medium of the first temperature zone 81 and less than that of the heat storage medium of the second temperature zone 82, for example, when the thermal storage medium is water, the floating plate 7 may be located at a thermocline between hot and cold water, when the heat storage device is in a heat storage stage or a heat release stage, the hot water or the cold water in the accommodating cavity 2 can cause the inclined temperature layer to rise or fall relative to the shell, the floating plate 7 floating at the inclined temperature layer can rise and fall along with the inclined temperature layer, therefore, the floating plate 7 can divide the accommodating cavity 2 into a first temperature zone 81 and a second temperature zone 82 which can be automatically adjusted along with the heat storage medium in the accommodating cavity 2, and separate the heat exchange medium with high temperature from the heat exchange medium with low temperature, so that the heat exchange medium with high temperature and the heat exchange medium with low temperature are prevented from generating the conditions of heat transfer, mixing, inclined temperature layer thickening and the like in the accommodating cavity 2, and the heat exchange efficiency of the heat storage device is improved.
As shown in fig. 1, the first water distributor 6a and the second water distributor 6b are arranged in the receiving chamber 2, and the first water distributor 6a is arranged at the first temperature zone 81 at the top end of the receiving chamber 2, for introducing the heat storage medium in the hot water pipe 5 into the first temperature zone 81 of the receiving chamber 2, or for leading the heat storage medium in the first temperature zone 81 out of the receiving chamber 2. The second water distributor 6b is arranged at the second temperature zone 82 at the bottom end of the accommodating cavity 2 and is used for guiding the heat storage medium in the cold water pipe 10 into the second temperature zone 82 of the accommodating cavity 2 or guiding the heat storage medium in the second temperature zone 82 out of the accommodating cavity 2.
According to the forced layering heat storage device, the floating plate 7 is arranged, so that the accommodating cavity 2 of the heat storage device is divided into the first temperature area 81 and the second temperature area 82, mixing of a high-temperature heat storage medium and a low-temperature heat storage medium in the heat storage device is effectively inhibited, the thickness of an inclined temperature layer is reduced, the heat storage efficiency of the heat storage device is improved, active equipment does not need to be arranged on the floating plate 7, and the forced layering heat storage device is stable and reliable in operation, low in cost and simple in subsequent maintenance.
Some embodiments of forced stratified thermal storage devices according to the present invention are described below with reference to fig. 1-3.
As shown in fig. 1, according to the forced stratification heat storage device of an embodiment of the present invention, a gap is provided between the floating plate 7 and the inner peripheral wall of the housing to communicate the first temperature zone 81 with the second temperature zone 82, so that friction between the floating plate 7 and the inner peripheral wall of the housing can be reduced, sliding of the floating plate 7 up and down in the accommodation chamber 2 can be facilitated, and release of pressure of the first temperature zone 81 and the second temperature zone 82 and the like can be facilitated by allowing water vapor or the like to pass between the first temperature zone 81 and the second temperature zone 82.
According to the forced stratification heat storage device of one embodiment of the present invention, the density of the floating plate 7 is ρ, and satisfies: rho is more than or equal to 950kg/m3 and less than or equal to 990kg/m3, so that the floating plate 7 can float in an inclined temperature layer between a high-temperature heat storage medium and a low-temperature heat storage medium, and the density of the floating plate 7 can be designed according to the design temperature of the heat storage medium in the heat storage device, namely the density of the floating plate 7 is smaller as the design temperature of the high-temperature heat storage medium is higher, so that the floating plate 7 can float in the inclined temperature layer between the high-temperature heat storage medium and the low-temperature heat storage medium.
According to the forced layering heat storage device provided by the embodiment of the invention, the accommodating cavity 2 is provided with a circular section, and the floating plate 7 is in a disc shape, so that the floating plate 7 can be conveniently matched with the accommodating cavity 2, and the floating plate 7 is not easily clamped in the process of sliding up and down in the accommodating cavity 2, and the stability of the heat storage device is improved.
According to the forced stratified thermal storage device of one embodiment of the present invention, as shown in fig. 1, the casing includes: the outer heat-insulating layer 9 covers the outer heat-insulating layer, the inner heat-insulating layer defines the accommodating cavity 2, in some examples, the inner wall layer 88 defines the accommodating cavity 22, and the material of the inner wall layer 8 can be stainless steel; the outer heat-insulating layer 9 is made of a heat-insulating material with the upper limit temperature higher than 110 ℃, the heat conductivity coefficient less than 0.05W/(mK) and high thermal stability.
According to the forced stratification heat storage device of one embodiment of the present invention, the first water distributor 6a and the second water distributor 6b are both disk type water distributors, the first water distributor 6a is provided with a pipe connector 65 communicating with the hot water pipe 5 at the axial end, the second water distributor 6b is provided with a pipe connector 65 communicating with the cold water pipe 10 at the axial end, the radial sides of the first water distributor 6a and the second water distributor 6b are provided with radially outward water distribution ports, the pipe connector 65 is used for guiding the heat storage medium in the hot water pipe 5 or the cold water pipe 10 into the water distributors, and the water connectors are used for guiding the heat storage medium guided into the water distributors into the accommodating chambers 2.
According to the forced stratification heat storage device of one embodiment of the present invention, the pipe connector 65 of the first water distributor 6a is disposed at the upper end of the first water distributor 6a, and the pipe connector 65 of the second water distributor 6b is disposed at the lower end of the second water distributor 6b, so that the heat storage medium with high temperature can be introduced from the upper side of the accommodating cavity 2 into the first temperature zone 81 through the hot water pipe 5, and the heat storage medium with low temperature can be introduced from the lower side of the accommodating cavity 2 into the second temperature zone 82 through the cold water pipe 10, so that the paths of the cold or hot heat exchange medium of the heat storage device entering and exiting the heat storage device can be separated, and the hot heat storage medium can be conveniently introduced into the first temperature zone 81 and the cold heat storage medium can be introduced into the second temperature.
According to the forced stratification heat storage device of one embodiment of the present invention, as shown in fig. 2, the pipe interface 65 of the first water distributor 6a is provided with a first diffuser 61a having an inner diameter gradually increasing from top to bottom, the pipe interface 65 of the second water distributor 6b is provided with a second diffuser having an inner diameter gradually increasing from bottom to top, and the first diffuser 61a and the second diffuser may be divergent pipes.
In some specific examples, the upper end of the first diffuser 61a is connected to the hot water pipe 5, the first diffuser 61a may be a gradually expanding pipe having a gradually increasing diameter from top to bottom, the lower end of the second diffuser is connected to the cold water pipe 10, and the second diffuser may be a gradually expanding pipe having a gradually increasing diameter from bottom to top.
The first diffuser 61a and the second diffuser are arranged to reduce water resistance in the process that the heat storage medium flows from the hot water pipe 5 into the first water distributor 6a or flows from the cold water pipe 10 into the second water distributor 6b, so as to perform a diversion function, and to make the heat storage medium flow more smoothly between the accommodating cavity 2 and the cold and hot water pipes 5.
According to the forced stratified thermal storage device of one embodiment of the present invention, as shown in fig. 2 and 3, each of the first water distributor 6a and the second water distributor 6b includes: the baffles 62 and the bottom plate 63 are vertically spaced and oppositely arranged, the pipe joints 65 are arranged on the baffles 62, and the water distribution ports are arranged between the baffles 62 and the bottom plate 63, so that the heat storage medium flowing into the water distributor from the hot water pipes 5 or the cold water pipes 10 can be guided by the bottom plate 63, flow into the accommodating cavity 2 from the space between the baffles 62 and the bottom plate 63, taking the first water distributor 6a as an example, the heat storage medium flows into the water distributor from the hot water pipes 5 from top to bottom through the pipe joints 65, the heat storage medium flows out of the pipe joints 65 and then impacts on the bottom plate 63, and flows to all radial directions of the bottom plate 63 through the guide of the bottom plate 63 and the baffles 62, and finally flows out of the first water distributor 6a from the water distribution ports between the baffles 62 and the bottom plate 63, and the process of flowing the heat storage medium into the accommodating cavity 2 from the cold water pipes 10 through the second water distributor 6b is similar to.
The baffle plate 62 and the bottom plate 63 are arranged to guide and buffer the heat storage medium flowing into the first water distributor 6a or the second water distributor 6b, so that the flow rate of the heat storage medium flowing into the accommodating cavity 2 is low, the disturbance of water flow in the heat storage device is reduced, and the safety and the heat storage efficiency of the heat storage device are enhanced.
According to the forced stratification heat storage device of one embodiment of the present invention, as shown in fig. 3, the diameter of the baffle plate 62 is equal to the diameter of the bottom plate 63, and the baffle plate 62 and the bottom plate 63 are arranged in a centering manner, so that the heat storage device impacting on the bottom plate 63 does not splash onto the inner wall of the upper part of the housing, etc., the baffle plate 62 can guide the heat storage medium downwards, the heat storage medium can smoothly flow into the accommodating cavity 2, and the baffle plate 62 and the bottom plate 63 have the same diameter, which facilitates the manufacture and assembly of the water distributor, thereby reducing the manufacturing cost of the water distributor.
According to the forced stratified thermal storage apparatus of one embodiment of the present invention, as shown in fig. 2, each of the first water distributor 6a and the second water distributor 6b includes: the baffles 64 are arranged along the circumferential direction of the pipe joints 65 at intervals, the baffles 64 are connected between the baffle 62 and the bottom plate 63, and the baffles 64 extend along the radial direction, so that a plurality of water distribution ports can be formed on the first water distributor and the second water distributor 6b by the plurality of baffles 64, the baffles 64 are used for distributing heat storage media flowing into the water distributors, the heat storage media can flow into the accommodating cavity 2 through different water distribution ports, the baffles 64 can also play a role in reducing the flow velocity of the heat storage device, further reducing the water inlet disturbance in the water inlet process of the heat storage device, preventing the impact of water inlet on the floating plate 7, and enabling the floating plate 7 to stably play a role in layering hot water and cold water.
According to the forced stratification heat storage device of one embodiment of the present invention, the radially inner end of the partition plate 64 extends to the edge of the pipe joint 65, and the radially outer end of the partition plate 64 extends to the outer peripheral edge of the base plate 63, so that the partition plate 64 can guide the heat storage medium after flowing out of the pipe joint and guide the heat storage medium to the outer peripheral edge of the base plate 63 and flow into the accommodation chamber 2.
In some embodiments, the forced-stratification heat storage device may further include a hot water outlet temperature measuring point 19, a cold water outlet temperature measuring point 20, and an intelligent controller 21, wherein the hot water outlet temperature measuring point 19 may be located at a hot water outlet of the heat storage device for measuring a temperature of hot water flowing out of the heat storage device, the cold water outlet temperature measuring point 20 may be located at a cold water outlet of the heat storage device for measuring a temperature of cold water flowing out of the heat storage device, and the intelligent controller 21 is configured to control the heat release circulation pump 14 according to a temperature of water measured by the hot water outlet temperature measuring point 19 or to control an operation of the heat storage circulation pump 12 according to a temperature of water measured by the cold water outlet temperature measuring point 20, so that a control process of the.
The operation of the forced stratification thermal storage device according to one embodiment of the present invention is described below with reference to fig. 1-3 (taking the thermal storage medium as water for example):
the heat source 1 is used for heating water, the heat source 1 can be an electric boiler, the heat source 1 is started in the period of off-peak electricity at night or in the period of using abandoned wind electricity, and electric energy is converted into heat energy of the water for heat storage.
In the heat storage stage, the heat source 1 heats water, the water flows into the heat storage device through the heat source outlet valve 3, the hot water valve 4, the hot water pipe 5 and the first water distributor 6a, the first temperature zone 81 (namely a high-temperature water zone) in the heat storage device is thickened, the floating plate 7 sinks and moves in a translation mode, cold water at the bottom of the heat storage device flows out, and the cold water flows back to the heat source 1 to be continuously heated after being pressurized through the second water distributor 6b, the cold water pipe 10, the cold water valve 11 and the heat storage circulating pump. When the floating plate 7 reaches the second water distributor 6b, the heat storage device is filled with hot water, and after the temperature of outlet water is measured by a cold water outlet temperature measuring point 20 at the bottom of the heat storage device to reach the set water temperature, the intelligent controller 21 controls the heat storage circulating pump to stop, and the heat storage stage is finished.
During the heat release phase, hot water flows through the hot water pipe 5 and the hot water valve 4 into the hot user 13. The hot water becomes low-temperature return water after heat exchange by the heat user 13, the low-temperature return water is pressurized by the heat release circulating pump 14 and flows into the heat storage device through the cold water pipe 10, the cold water valve 11 and the second water distributor 6b, a low-temperature water area in the heat storage device is thickened, the floating plate 7 floats upwards and moves in a translation mode, and the hot water on the upper portion of the heat storage device flows out. When the floating plate 7 reaches the second water distributor 6b, the heat storage device is filled with cold water, and after the outlet water temperature is detected to be reduced to the set water temperature by a hot water outlet temperature measuring point 19 at the upper part of the heat storage device, the intelligent controller 21 controls the heat release circulating pump 14 to stop, and the heat release stage is finished.
According to the heat storage device with forced layering, the floating plate 7 which is driven by buoyancy to automatically translate is arranged, a hot water area and a cold water area are effectively isolated, layering of heat storage media can be achieved, water inlet disturbance of the heat storage device is reduced, convection cross mixing of cold water and hot water is inhibited, heat conduction of the cold water and the hot water is reduced, efficiency of the heat storage device is improved, an efficient energy-saving heat storage mode which is generally applicable to heat supply systems in areas such as cogeneration, thermal power depth peak regulation, valley electricity utilization and the like is provided, active equipment does not need to be arranged on the floating plate 7, and the heat storage device is stable and reliable in operation, low in cost and simple in follow-up maintenance.
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements 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.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. A forced stratification heat storage device, comprising:
the shell is used for limiting an accommodating cavity for accommodating a heat storage medium, a floating plate suitable for floating in the heat storage medium is arranged in the shell and movably assembled along the vertical direction relative to the inner peripheral wall of the shell, the accommodating cavity is divided into a first temperature zone located above the floating plate and a second temperature zone located below the floating plate by the floating plate, the first temperature zone is communicated with the second temperature zone, and the density of the floating plate is greater than that of the heat storage medium in the first temperature zone and less than that of the heat storage medium in the second temperature zone;
the first water distributor is arranged in the first temperature zone and is used for being communicated with a hot water pipe;
the second water distributor is arranged in the second temperature zone and is used for being communicated with the cold water pipe; wherein,
the temperature of the heat storage medium in the first temperature zone is higher than that of the heat storage medium in the second temperature zone when the forced layering heat storage device works, so that the density of the heat storage medium in the first temperature zone is smaller than that of the heat storage medium in the second temperature zone.
2. The forced stratified thermal storage device according to claim 1, wherein a gap is provided between the floating plate and an inner peripheral wall of the casing to communicate the first temperature zone with the second temperature zone.
3. A forced stratified thermal storage apparatus as claimed in claim 1, wherein the density of said floating plates is p, satisfying: 950kg/m3≤ρ≤990kg/m3。
4. A forced stratified thermal storage apparatus as claimed in claim 1, wherein said receiving cavity has a circular cross-section and said float plate is disc-shaped.
5. A forced stratified thermal storage apparatus as claimed in claim 1, wherein said housing comprises: outer heat preservation and interior heat preservation, outer heat preservation cover in outside the interior heat preservation, interior heat preservation is injectd and is held the chamber.
6. A forced stratified thermal storage apparatus according to any one of claims 1 to 5, wherein the first water distributor and the second water distributor are both disk-type water distributors, and the first water distributor and the second water distributor are provided at axial ends thereof with pipe joints communicating with the hot water pipes and the cold water pipes, respectively, and radial sides of the first water distributor and the second water distributor are provided with radially outward water distribution ports.
7. The forced stratified thermal storage device according to claim 6, wherein the pipe joints of the first water distributors are provided at upper ends of the first water distributors, and the pipe joints of the second water distributors are provided at lower ends of the second water distributors.
8. The forced stratified thermal storage device according to claim 7, wherein the pipe joints of the first water distributors are provided with first diffusers whose inner diameters become larger from top to bottom, and the pipe joints of the second water distributors are provided with second diffusers whose inner diameters become larger from bottom to top.
9. The forced stratified thermal storage device of claim 6, wherein the first water distributor and the second water distributor each comprise: the water distribution device comprises baffles and a bottom plate which are oppositely arranged at intervals along the vertical direction, the pipe joints are arranged on the baffles, and the water distribution ports are arranged between the baffles and the bottom plate.
10. A forced stratified thermal storage apparatus as claimed in claim 9, wherein said baffles have a diameter equal to the diameter of said base plate and are arranged centrally with respect to said base plate.
11. The forced stratified thermal storage device of claim 9, wherein the first water distributor and the second water distributor each comprise: a plurality of baffles disposed circumferentially spaced apart along the tube interface, the baffles connected between the baffle plate and the bottom plate and the baffles extending in a radial direction.
12. A forced laminar thermal storage apparatus according to claim 11, wherein the radially inner end of the partition extends to the rim of the tube interface and the radially outer end of the partition extends to the peripheral rim of the base plate.
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| CN201811198191.1A CN109114657A (en) | 2018-10-15 | 2018-10-15 | Force the regenerative apparatus of layering |
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| CN201811198191.1A CN109114657A (en) | 2018-10-15 | 2018-10-15 | Force the regenerative apparatus of layering |
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| CN112146498A (en) * | 2020-05-29 | 2020-12-29 | 国家电投集团科学技术研究院有限公司 | Thermocline control enhanced heat storage device and control method thereof |
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| CN110159380A (en) * | 2019-06-14 | 2019-08-23 | 国家电投集团科学技术研究院有限公司 | Single tank closed cycle energy-storing and power-generating system |
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| CN110487096A (en) * | 2019-08-22 | 2019-11-22 | 山东大学 | A kind of free separating device of cold fluid and hot fluid medium |
| CN110487096B (en) * | 2019-08-22 | 2020-06-02 | 山东大学 | Free separating device for cold and hot fluid medium |
| CN110657067A (en) * | 2019-11-14 | 2020-01-07 | 西安热工研究院有限公司 | Offshore wind power compressed air energy storage type heat reservoir and operation method |
| CN110657067B (en) * | 2019-11-14 | 2024-03-15 | 西安热工研究院有限公司 | Offshore wind power compressed air energy storage type heat reservoir and operation method |
| CN112146498A (en) * | 2020-05-29 | 2020-12-29 | 国家电投集团科学技术研究院有限公司 | Thermocline control enhanced heat storage device and control method thereof |
| CN112484317A (en) * | 2020-11-02 | 2021-03-12 | 国家电投集团科学技术研究院有限公司 | Heat storage device, heat storage system, and method for controlling heat storage system |
| EP4130603A1 (en) | 2021-08-02 | 2023-02-08 | Daikin Europe N.V. | Diffuser for hot water tank |
| BE1029644B1 (en) * | 2021-08-02 | 2023-02-27 | Daikin Europe Nv | DIFFUSER FOR HOT WATER TANK |
| CN117366545A (en) * | 2023-11-21 | 2024-01-09 | 北京中巨建润新能源科技有限公司 | Energy storage method and system based on gas self-contained power plant |
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