CN208170767U - A kind of heat-storing device and heat reservoir - Google Patents
A kind of heat-storing device and heat reservoir Download PDFInfo
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- CN208170767U CN208170767U CN201721355484.7U CN201721355484U CN208170767U CN 208170767 U CN208170767 U CN 208170767U CN 201721355484 U CN201721355484 U CN 201721355484U CN 208170767 U CN208170767 U CN 208170767U
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 12
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- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Inorganic materials [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 1
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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
-
- 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
Abstract
The utility model discloses a kind of heat-storing device and heat reservoir, wherein heat-storing device includes the heat accumulation tank body for heat accumulation, the two sides of heat accumulation tank body are respectively arranged with heat input mouth and heat delivery outlet, multi-layer phase change material is set in heat accumulation tank body, the channel of heat transfer medium circulation is formed between heat input mouth and heat delivery outlet by the gap of multi-layer phase change material, the phase transition temperature of every layer of phase-change material is incremented by one by one along heat input mouth to heat delivery outlet direction, phase transition temperature is that the Current Temperatures of heat transfer medium reach the temperature melted when the fusing point of every layer of phase-change material.The utility model phase-change material different by setting multilayer, with different phase transition temperatures, therefore can provide the accumulation of heat heat of enough capacity, and can accelerate heat accumulation efficiency by latent heat of phase change.
Description
Technical field
The utility model relates to solar energy heat-storage technical fields, and in particular to a kind of heat-storing device and heat reservoir.
Background technique
Raising with the shortage and people of conventional energy resource to environmental quality requirement, solar energy as renewable energy,
It develops and utilizes the important component for having become today's society energy strategy.Due to the discontinuity and shakiness of solar radiation
Qualitative, the operation of solar power system also has strong fluctuation and intermittence, to guarantee that solar thermal utilization stablizes fortune
Row makes up between the supply and demand of the energy in existing quantity, in form, time and difference spatially, solar heat benefit
Heat reservoir is all had with general in system, which can be converted to heat storage for the solar radiation on daytime, when
There is no that heat is released utilization again when solar irradiation.
In solar power system, meet high crest segment power demand to provide not intermittently electric power, while ensuring that power grid is flat
Weighing apparatus, heat accumulation type photo-thermal power generation can provide the base-load supply of good scheduling property for power grid, not only can solve the available of solar energy
Property with the unmatched contradiction of electricity needs, to solar energy " peak load shifting " to extend system generating dutation, optimization uses renewable
The share and energy efficiency of the energy and raising solar energy in energy utilization, and can effectively systems stabilisation operation and raising
System generating efficiency.
Most of current heat reservoir is the mode based on sensible heat heat accumulation, is stored using the temperature change of heat accumulation object
The mode of heat is known as sensible heat heat accumulation, such as：It, should based on the mode that thermoclinic single tank heat reservoir is exactly using sensible heat heat accumulation
Single only one heat storage can of tank heat reservoir, high-temperature heat-storage working medium is extracted out at the top of tank by high-temperature pump when heat release, by heat exchange
After device heat release is cooling, entered in tank by pot bottom；Low temperature heat accumulation working medium is extracted out in the bottom of tank by cryogenic pump when filling heat, by changing
After hot device heating, entered in tank by the top of tank.Since cold and hot fluid is stored in simultaneously in a tank, the liquid of high and low temperature
The density of body medium is different, will form the mesolimnion that thickness is smaller but temperature gradient is very big between the cold and hot fluid in single tank,
Thermoclinic presence is separated by cold and hot fluid, so single tank heat reservoir is properly termed as mesolimnion heat reservoir again.Heat accumulation
When mesolimnion above hot fluid gradually increase, cold fluid below gradually decreases, and mesolimnion moves down, then phase when heat release
Instead, the heat accumulation working medium of extraction is able to maintain constant temperature.
Since sensible heat heat accumulation is to store heat using the temperature change of heat accumulation object, therefore its energy storage density is smaller, unit
The energy that volume can store is less, so that the volume of energy storage device is excessively huge, heat storage capacity is limited.Because solar irradiation is strong
The complicated fluctuation of degree, and be to degenerate to expand to mesolimnion in a charge and discharge heat circulating system based on thermoclinic single can system
Inhibit, the mesolimnion as caused by function of environment heat emission and various local turbulents can not effectively be avoided to expand, so the system is in frequency
Using thermoclinic single tank heat accumulation by the local turbulent of aggravation inlet and outlet during numerous charge and discharge hot-swap, so that the system effectiveness
It reduces, and leads to system fluctuation of service.
Utility model content
Therefore, the utility model embodiment technical problems to be solved are the base in the prior art using sensible heat heat accumulation
In thermoclinic heat accumulation mode, since the heat reservoir utilizes thermoclinic single tank heat accumulation during frequent charge and discharge hot-swap
By the local turbulent of aggravation inlet and outlet, so that the system effectiveness reduces, and lead to system fluctuation of service.
For this purpose, the utility model embodiment provides following technical solution：
The utility model embodiment provides a kind of heat-storing device, including the heat accumulation tank body for heat accumulation, the heat accumulation tank body
Two sides be respectively arranged with heat input mouth and heat delivery outlet, in the heat accumulation tank body be arranged multi-layer phase change material, it is described
The logical of heat transfer medium circulation is formed by the gap of the multi-layer phase change material between heat input mouth and the heat delivery outlet
The phase transition temperature in road, every layer of phase-change material is incremented by one by one along the heat input mouth to heat delivery outlet direction, institute
It states the Current Temperatures that phase transition temperature is the heat transfer medium and reaches the temperature melted when the fusing point of every layer of phase-change material.
Optionally, the heat input mouth and the heat delivery outlet are respectively arranged with first fluid pump and second fluid
Pump.
Optionally, every layer of phase-change material is rearranged by multiple phase-change materials of the same race.
Optionally, each phase-change material in every layer of phase-change material is made of block-like capsule fortreating AIDS, in the glue
Fill phase transformation object in intracapsular portion.
Optionally, the section of the block-like capsule fortreating AIDS includes that round or rectangle is trapezoidal or fan-shaped or irregular shape
One or more of.
Optionally, the logical of the heat transfer medium is formed in the coil pipe of the settable winding of spiraling in the inside of the heat accumulation tank body
Road.
Optionally, it is identical that the phase transition temperature difference of adjacent two layers is made by configuring the component ratio of the phase-change material
Threshold value.
Optionally, the heat accumulation tank body is cylindrical body.
The utility model embodiment provides a kind of heat reservoir, including：
Heat collecting field is exported for absorbing thermal energy, and by the thermal energy by heat transfer medium；
The heat-storing device inputs the heat transfer medium from the heat collecting field by pipeline using its heat input mouth and stores up
Deposit the thermal energy；
Heat engine running equipment, heat transfer medium for directly being exported when the heat collecting field is in photo-thermal abundance by pipeline or
When the heat collecting field carries out energy by the heat transfer medium that the heat delivery outlet of the heat-storing device exports when photo-thermal is inadequate
Driving.
Optionally, the heat transfer medium includes water or conduction oil or fuse salt.
Optionally, the heat collecting field include slot type or tower or butterfly or Fresnel in one or more of solar energy heatings
?.
Optionally, it includes steam generator, steam turbine generator and heating installation that the heat engine operation is hot standby.
The utility model embodiment technical solution, has the following advantages that：
The utility model provides a kind of heat-storing device and heat reservoir, and wherein heat-storing device includes the heat storage can for heat accumulation
Body, the two sides of heat accumulation tank body are respectively arranged with heat input mouth and heat delivery outlet, and multi-layer phase change material is arranged in heat accumulation tank body
Material forms the channel of heat transfer medium circulation, often by the gap of multi-layer phase change material between heat input mouth and heat delivery outlet
The phase transition temperature of layer phase-change material is incremented by one by one along heat input mouth to heat delivery outlet direction, and phase transition temperature is heat transfer medium
Current Temperatures reach the temperature melted when the fusing point of every layer of phase-change material.The utility model phase different by setting multilayer
Become material, with different phase transition temperatures, therefore the accumulation of heat heat of enough capacity can be provided, and can be added by latent heat of phase change
Fast heat accumulation efficiency.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the first structure diagram of heat-storing device in the utility model embodiment 1；
Fig. 2 is the second structural schematic diagram of heat-storing device in the utility model embodiment 1；
Fig. 3 A is the third structural schematic diagram of heat-storing device in the utility model embodiment 2；
Fig. 3 B is the 4th structural schematic diagram of heat-storing device in the utility model embodiment 2；
Fig. 3 C is the 5th structural schematic diagram of heat-storing device in the utility model embodiment 2；
Fig. 3 D is the 6th structural schematic diagram of heat-storing device in the utility model embodiment 2；
Fig. 3 E is the 7th structural schematic diagram of heat-storing device in the utility model embodiment 2；
Fig. 4 is the 8th structural schematic diagram of heat-storing device in the utility model embodiment 4；
Fig. 5 is the structural schematic diagram of heat reservoir in the utility model embodiment 5.
Specific embodiment
It is clearly and completely described below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that institute
The embodiment of description is the utility model a part of the embodiment, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the range of the utility model protection.
In the description of the utility model embodiment, it should be noted that term " center ", "upper", "lower", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "inner", "outside" is orientation based on the figure or position
Relationship, be merely for convenience of description the utility model embodiment and simplify description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limit to the utility model
System.In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply relatively important
Property.
In the description of the utility model embodiment, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can also be the connection inside two elements, can be wireless connection, be also possible to wired connection.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
Embodiment 1
The utility model embodiment provides a kind of heat-storing device, is used in heat reservoir, as shown in Figure 1, including for storing up
The heat accumulation tank body 1 of heat, the heat accumulation tank body 1 are the heat storage can of cylindrical body, and the tank diameter and height of the heat accumulation tank body 1 are arranged main
Depending on heat accumulation temperature and heat storage capacity, heat accumulation tank body 1 is cylindrical body.The two sides of heat accumulation tank body 1 are respectively arranged with heat input
Mouthfuls 11 and heat delivery outlet 12, multi-layer phase change material is set in heat accumulation tank body 1, be respectively PCM1, PCM2, PCM3, PCM4,
PCM5 ... PCMn forms heat transfer medium by the gap of multi-layer phase change material between heat input mouth 11 and heat delivery outlet 12
The phase transition temperature in the channel of circulation, every layer of phase-change material is incremented by one by one along heat input mouth 11 to 12 direction of heat delivery outlet, phase
Temperature is that the Current Temperatures of heat transfer medium reach the temperature melted when the fusing point of every layer of phase-change material, PCM1, PCM2,
The corresponding phase transition temperature of PCM3, PCM4, PCM5 ... PCMn is respectively T1, T2, T3, T4, T5, Tn, wherein T1<T2<T3<T4<
T5…<Tn。
Specifically, phase-change material (PCM-Phase Change Material), which refers to, varies with temperature and changes physical
Matter simultaneously can provide the substance of latent heat, by taking solid-liquid phase change as an example, when being heated to fusion temperature, just generate from solid-state to liquid
Phase transformation, during fusing, phase-change material absorbs and stores a large amount of latent heat, and when phase-change material is cooling, the heat of storage exists
It to be dispersed into environment, be carried out from liquid to solid reverse transformation within the scope of certain temperature.In both phase transition process,
Stored or release energy is known as latent heat of phase change.When physical state changes, the temperature of material itself is before phase transformation completion
It almost remains unchanged, forms a wide temperature platform, although temperature-resistant, absorb or the latent heat of release is quite big.
There is latent heat property using phase-change material, apply it in the heat-storing device in the present embodiment, different phase transformations
Material has different phase transition temperatures, and phase transition temperature herein refers in particular to temperature when phase-change material melts, in heat accumulation tank body 1
It is middle to be stacked into the phase-change material with different phase transition temperatures respectively, the regenerator temperature range of capacity super large can be provided, without
Picture individually passes through high temperature and low temperature progress cycle charge discharge heat progress heat accumulation in the mouth that outputs and inputs of tank body in the prior art,
It is limited that it will cause regenerative capacity.
Specifically, as shown in Fig. 2, single tank 1 includes five layers of phase-change material according to phase transition temperature from the heat of heat accumulation tank body 1
Amount input port 11 to 12 direction of heat delivery outlet is incremented by one by one is stacked into layer structure, and first layer phase-change material is NaNO3(nitric acid
Sodium), second layer phase-change material is KOH (potassium hydroxide), and third layer phase-change material is LiOH (lithium hydroxide), the 4th layer of phase transformation material
Material is MgCl2(magnesium chloride), layer 5 phase-change material are NaCO3(sodium carbonate), this five layers of phase-change materials are according to its phase transformation respectively
Temperature, i.e. fusing point are incremented by one by one is stacked into layer structure, i.e. first layer phase-change material temperature T1<Second layer phase-change material temperature T2
<Third layer phase-change material temperature T3<4th layer of phase-change material temperature T4<Layer 5 phase-change material temperature T5；1 institute of table specific as follows
Show：
| Phase-change material | Fusing point (DEG C) | Melt heat (kJ/kg-1) |
| NaNO3(sodium nitrate) | 307 | 172 |
| KOH (potassium hydroxide) | 380 | 149.7 |
| LiOH (lithium hydroxide) | 471 | 876 |
| MgCl2(magnesium chloride) | 714 | 452 |
| NaCO3(sodium carbonate) | 854 | 275.7 |
Table 1
Above-mentioned five kinds of phase-change materials are all inorganic salts phase-change material, between existing centainly between adjacent two layers phase-change material
Gap will form the channel of heat transfer medium circulation in the gap of every layer of phase-change material, and stacking in heat accumulation tank body 1 has different phase transformations
The phase-change material of temperature is to provide a variety of accumulation of heat spaces to the heat transfer medium of different temperatures.
Such as：Heat transfer medium flows into heat accumulation tank body 1 by fluid pump by pipeline from solar energy heat-collection field, the heat transfer medium
Circulation passage is formed inside heat accumulation tank body 1, when daytime, solar irradiation is stronger, if the Current Temperatures of heat transfer medium are 350
DEG C, which is flowed by the heat input mouth 11 of heat accumulation tank body 1.Because first layer phase-change material is NaNO3(nitre
Sour sodium), fusing point is 307 DEG C, encounters 350 DEG C of heat transfer medium and undergoes phase transition absorption 172kJ/kg-1Latent heat, and heat is stored up
It stores away.Temperature reduces after 350 DEG C of heat-transfer medium temperature is absorbed heat by phase-change material, at this time can be by fluid pump by the temperature
Heat transfer medium extraction after reduction.When night, solar irradiation is weaker, the heat transfer medium from solar energy heat-collection field in the duct
Temperature reduces, and the heat transfer medium which reduces flows into heat accumulation tank body 1 by fluid pump, or the cryogenic heat transfer of extraction on daytime is situated between
Matter is recovered to again inside heat accumulation tank body 1.Because of first layer phase-change material NaNO3(sodium nitrate) is stronger in daylight
When store certain heat, the temperature of the heat transfer medium of low temperature can be promoted rapidly.
Such as：Heat transfer medium flows into heat accumulation tank body 1 by fluid pump by pipeline from solar energy heat-collection field, the heat transfer medium
Circulation passage is formed inside heat accumulation tank body 1, when daytime, solar irradiation is stronger, if the Current Temperatures of heat transfer medium are 400
DEG C, which is flowed through by the heat input mouth of heat accumulation tank body 1.Because first layer phase-change material is NaNO3(nitric acid
Sodium), fusing point is 307 DEG C, encounters 400 DEG C of heat transfer medium and undergoes phase transition absorption 172kJ/kg-1Latent heat, second layer phase transformation material
Expect KOH (potassium hydroxide), fusing point is 380 DEG C, encounters 400 DEG C of heat transfer medium and undergoes phase transition absorption 149.7kJ/kg-1It is latent
Heat, so first layer phase-change material NaNO3(sodium nitrate) and second layer phase-change material KOH (potassium hydroxide) can be stored largely
Heat, temperature reduces after 400 DEG C of heat-transfer medium temperature is absorbed heat by phase-change material at this time, at this time can be by fluid pump by the temperature
Heat transfer medium after degree reduces is extracted out.When night, solar irradiation is weaker, and the heat transfer from solar energy heat-collection field in the duct is situated between
The temperature of matter reduces, and the heat transfer medium which reduces flows into heat accumulation tank body 1 by fluid pump, or the low temperature of extraction on daytime is passed
Thermal medium is recovered to again inside heat accumulation tank body 1, because of first layer phase-change material NaNO3(sodium nitrate) and KOH (potassium hydroxide)
Certain heat is stored when daylight is stronger, and the temperature of the heat transfer medium of low temperature is further mentioned rapidly
It rises, two layers of phase-change material more enhances heat storage capacity.
Such as：Heat transfer medium flows into heat accumulation tank body 1 by fluid pump by pipeline from solar energy heat-collection field, the heat transfer medium
Circulation passage is formed inside heat accumulation tank body 1, when daytime, solar irradiation is stronger, if the Current Temperatures of heat transfer medium are 450
DEG C, which is flowed through by the heat input mouth of heat accumulation tank body 1.Because first layer phase-change material is NaNO3(nitric acid
Sodium), fusing point is 307 DEG C, encounters 450 DEG C of heat transfer medium and undergoes phase transition absorption 172kJ/kg-1Latent heat, second layer phase transformation material
Expect KOH (potassium hydroxide), fusing point is 380 DEG C, encounters 450 DEG C of heat transfer medium and undergoes phase transition absorption 149.7kJ/kg-1It is latent
Heat, third layer phase-change material LiOH (lithium hydroxide), fusing point is 471 DEG C, so first layer phase-change material NaNO3(nitric acid
Sodium), second layer phase-change material KOH (potassium hydroxide) and third layer phase-change material LiOH (lithium hydroxide) storage heat ability again
It further enhances.Temperature reduces after 450 DEG C of heat-transfer medium temperature is absorbed heat by phase-change material at this time, can pass through fluid pump at this time
Heat transfer medium extraction after the temperature is reduced.When night, solar irradiation is weaker, in the duct from solar energy heat-collection field
The temperature of heat transfer medium reduces, and the heat transfer medium which reduces flows into heat accumulation tank body 1 by fluid pump, or daytime is extracted out
Cold heat transfer media is recovered to again inside heat accumulation tank body 1.Because of first layer phase-change material NaNO3(sodium nitrate), second layer phase
Become material KOH (potassium hydroxide) and third layer phase-change material LiOH (lithium hydroxide) is stored when daylight is stronger
Certain heat, the temperature of the heat transfer medium of low temperature further promoted rapidly, three layers of phase-change material heat storage capacity again into
The enhancing of one step.
Similarly, because of the 4th layer of phase-change material MgCl2(magnesium chloride) and layer 5 phase-change material NaCO3(sodium carbonate) melts
Point is respectively 714 DEG C and 854 DEG C, and when daytime, solar irradiation is stronger, if as long as the Current Temperatures of heat transfer medium are than the 4th layer
Phase-change material MgCl2(magnesium chloride) and layer 5 phase-change material NaCO3The temperature of the fusing point of (sodium carbonate) is high, and phase can all occur
Variation does not absorb 452kJ/kg-1And 275.7kJ/kg-1Heat, simultaneously as first layer phase-change material NaNO3(sodium nitrate), the
Two layers of phase-change material KOH (potassium hydroxide), third layer phase-change material LiOH (lithium hydroxide), their melting temperature be present by
One incremental trend, so first layer phase-change material NaNO3(sodium nitrate), second layer phase-change material KOH (potassium hydroxide), third
Layer phase-change material LiOH (lithium hydroxide) encounters than the 4th layer phase-change material MgCl2(magnesium chloride) and layer 5 phase-change material NaCO3
The high heat transfer medium of the temperature of the fusing point of (sodium carbonate) necessarily can all be undergone phase transition, and a large amount of heat is stored in heat accumulation tank body 1
Amount, its temperature reduction after the temperature of the heat transfer medium of high temperature is absorbed heat by phase-change material at this time can be by fluid pump by the temperature
Heat transfer medium extraction after reduction.When night, solar irradiation is weaker, the heat transfer medium from solar energy heat-collection field in the duct
Temperature reduce, the heat transfer medium which reduces flows into heat accumulation tank body 1 by fluid pump, or by the cryogenic heat transfer of extraction on daytime
Medium is recovered to again inside heat accumulation tank body 1.Because multi-layer phase change material is stored when daylight is stronger greatly
The heat of amount further promotes rapidly the temperature of cold heat transfer media, and multi-layer phase change material heat storage capacity is quite strong, low at this time
The temperature of warm heat transfer medium gradually increases in a relatively short period of time.Situation that in this way can be weaker in solar irradiation, passes through heat accumulation
The heat that tank body 1 is stored on daytime by multi-layer phase change material is given from solar energy heat-collection field heat transfer medium in the duct or pumping
Cold heat transfer media out discharges heat.
In conclusion during the day, as long as the melting temperature of phase-change material of the Current Temperatures of heat transfer medium higher than every layer,
Then the phase-change material of this layer can all be undergone phase transition, so that generating phase transformation absorbs heat, and by its heat storage in heat accumulation tank body 1
In, at night, cold heat transfer media passes low temperature by the heat that phase-change material stores during the day by heat accumulation tank body 1
The temperature of thermal medium is promoted rapidly.Latent heat of phase change is provided using five layers of phase-change material of above-mentioned different phase transition temperatures, it can be quickly complete
At heat-accumulating process, without as in a heat storage can, completing heat accumulation in the way of thermoclinic sensible heat in the prior art, because
In the prior art generally in heat storage can input port and delivery outlet, respectively by its low temperature heat-storage medium and high-temperature heat-storage medium by changing
Hot device back and forth cyclic switching complete heat release and when heat-accumulating process, i.e. heat release high-temperature heat-storage working medium at the top of tank by high temperature pumping
Out, after heat exchanger heat release is cooling, entered in tank by pot bottom；Low temperature heat accumulation working medium is in the bottom of tank by cryogenic pump when filling heat
Extraction, after heat exchanger heats, is entered in tank by the top of tank.Due to, cold and hot fluid is stored in simultaneously in a tank,
The density of the liquid medium of high and low temperature is different, will form that a thickness is smaller but temperature gradient between the cold and hot fluid in single tank
Very big mesolimnion, thermoclinic presence is separated by cold and hot fluid, so single tank heat reservoir is properly termed as mesolimnion again
Heat reservoir.Hot fluid when heat accumulation above mesolimnion gradually increases, and cold fluid below gradually decreases, and mesolimnion is to moving down
It is dynamic, then on the contrary, the heat accumulation working medium of extraction is able to maintain constant temperature when heat release.So mode in the prior art can only be to high/low temperature
Heat-storage medium provides accumulation of heat, and heat-exchange temperature is by certain limitation, and mesolimnion generates sensible heat and is far smaller than phase-change material
The latent heat of generation, since heat storage can outputs and inputs mouth and can generate certain turbulent flow during charge and discharge hot frequent switching,
Mesolimnion is caused to be easy to happen degeneration expansion phenomenon.Therefore the heat-storing device in the present embodiment can not only provide enough accumulation of heats and hold
Amount, the phase-change material of different stratiforms make heat accumulation range more greatly, it can be achieved that more fine storage with different phase transition temperatures
Hot temperature control, can effectively improve heat accumulation efficiency, also further improve efficiency of heating- utilization.
According to different applications, the later period can produce more kinds of phase-change materials, according to the heat accumulation in the present embodiment
Device is stacked into layer structure by the mode that phase transition temperature is incremented by one by one, and it is several layers of to can be than five layers phase-change material more ten
Phase-change material is also possible to the less two or three layer of phase-change material of than five layers phase-change material, using various temperature range to not equality of temperature
The heat transfer medium of degree provides accumulation of heat space and completes quick heat accumulation.
Embodiment 2
The utility model embodiment provides a kind of heat-storing device, as figs. 3 a-3 e, the phase transformation material of respectively five kinds structures
Expect the heat-storing device of composition.Including the heat accumulation tank body 1 for heat accumulation, which is cylindrical heat storage can, the heat storage can
The tank diameter of body 1 and height setting depend primarily on heat accumulation temperature and heat storage capacity, and heat accumulation tank body is cylindrical body.Heat accumulation tank body
1 two sides are respectively arranged with heat input mouth 11 and heat delivery outlet 12, and multi-layer phase change material, heat are arranged in heat accumulation tank body 1
It measures and passes through the channel that the gap formation heat transfer medium of multi-layer phase change material circulates between input port 11 and heat delivery outlet 12, every layer
The phase transition temperature of phase-change material is incremented by one by one along heat input mouth 11 to 12 direction of heat delivery outlet, and phase transition temperature is heat transfer medium
Current Temperatures reach the temperature melted when the fusing point of every layer of phase-change material.Every layer of phase-change material is by multiple phase transformation materials of the same race
Material rearranges, and each phase-change material in every layer of phase-change material is made of block-like capsule fortreating AIDS, fills phase in capsule
Become object, in figs. 3 a-3e, first layer PCM1, second layer PCM2, n-th layer PCMn, the section of block-like capsule fortreating AIDS
Can one or more of or irregular shape trapezoidal or fan-shaped for round or rectangle, wherein two neighboring block-like solid
There are the channels that certain interval can form heat transfer medium circulation between the phase-change material of capsule composition.
In figure 3 a, each phase-change material in every layer of phase-change material --- the section of block-like capsule fortreating AIDS is according to specific
Size produces the regular phase transformation material gone out for circular capsule fortreating AIDS by preparatory delicate execution for circle of the same size, section
Material.
In figure 3b, each phase-change material in every layer of phase-change material --- the section of block-like capsule fortreating AIDS is according to specific
Size produces the regular phase transformation material gone out for the capsule fortreating AIDS of rectangle by preparatory delicate execution for rectangle of the same size, section
Material；
In fig. 3 c, each phase-change material in every layer of phase-change material --- the section of block-like capsule fortreating AIDS is according to specific
Size is produced to be of the same size trapezoidal, and section is the regular phase transformation material that trapezoidal capsule fortreating AIDS is gone out by preparatory delicate execution
Material；
In fig. 3d, each phase-change material in every layer of phase-change material --- the section of block-like capsule fortreating AIDS is according to specific
Size produces the regular phase transformation material gone out for fan-shaped capsule fortreating AIDS by preparatory delicate execution for sector of the same size, section
Material；
Each phase-change material --- the sectional dimension of block-like capsule fortreating AIDS in Fig. 3 A-3D, in every layer of phase-change material
Unanimously, naturally it is also possible to be needed to set phase-change material to irregular shape according to occasion, then every layer of phase-change material can be by
Any regular shape-circle or rectangle is trapezoidal or fan-shaped or irregular shape constitutes the section of each massive transformation material, often
Each phase-change material of the layer phase-change material by section for regular shape and irregular shape rearranges, as shown in FIGURE 3 E.
Optionally, each phase-change material that above-mentioned block-like capsule fortreating AIDS is constituted may be graininess.
Specifically, because phase-change material (PCM) is broadly divided into three classes：
The first kind is inorganic phase-changing material；Such as：The crystallization water and salt, fuse salt, metal or alloy；
Second class is organic phase change material；Such as：Paraffin, acetic acid, other organic matters；
Third class is composite phase-change material；Such as：The ingredient of two kinds of phase-change materials is mixed.
The phase transition temperature of inorganic phase-changing material, as fusing point in the present embodiment, phase transition temperature is higher, is generally used
Industrially, the phase transition temperature of organic phase change material is lower, is generally used in heat accumulation electric appliance.Either inorganic phase-changing material, have
Machine phase-change material or composite phase-change material require to be encapsulated by solid shell, and solid shell can be block-like glue
Capsule fills phase-change material in the inside of capsule, becomes liquid after phase-change material fusing and is just wrapped by the capsule of solid.Often
One layer of phase-change material is rearranged by multiple block-like capsule fortreating AIDS phase-change materials, wherein each block-like capsule fortreating AIDS phase transformation
Material is same type of phase-change material, and the phase-change material type of same layer is all identical.Such as：First layer phase-change material can be with
For multiple identical block-like NaNO3(sodium nitrate) rearranges, and can also be made of multiple block-like composite phase-change materials
The component ratio of type, composite phase-change material is different, but the compound rear composite phase-change material for an entirety, multiple compound compositions
Phase-change material can also be used for stacking every layer of structure of heat accumulation tank body 1.
As a kind of optional implementation, heat-storing device in the utility model embodiment, heat input mouth 11 and heat
Amount delivery outlet 12 is respectively arranged with first fluid pump and second fluid pump.Wherein first fluid pump will be for that will flow through heat accumulation tank body 1
The heat transfer medium of heat input mouth 11 is drawn into tank body, and second fluid pump will be for that will flow through 1 heat delivery outlet 12 of heat accumulation tank body
Heat transfer medium extraction be used as heat source.
Embodiment 3
The utility model embodiment provides a kind of heat-storing device, including the heat accumulation tank body 1 for heat accumulation, the heat accumulation tank body 1
For cylindrical heat storage can, the tank diameter of the heat accumulation tank body 1 and height setting depend primarily on heat accumulation temperature and heat storage capacity,
Heat accumulation tank body is cylindrical body.It is respectively arranged with heat input mouth 11 and heat delivery outlet 12 in the two sides of heat accumulation tank body 1, in heat accumulation
By the way that multi-layer phase change material is arranged in the coil pipe for winding of spiraling in tank body 1, the heat accumulation tank body 1 in the present embodiment can be by setting
The coil pipe for setting winding of spiraling forms the channel of heat transfer medium circulation, every layer of phase between heat input mouth 11 and heat delivery outlet 12
The phase transition temperature for becoming material is incremented by one by one along heat input mouth 11 to 12 direction of heat delivery outlet, and phase transition temperature is heat transfer medium
Current Temperatures reach the temperature melted when the fusing point of every layer of phase-change material.
The present embodiment forms heat transfer medium by spiraling the coil pipe of winding in 1 laid inside of heat accumulation tank body inside coil pipe
The channel of circulation, so that multi-layer phase change material is not necessarily to directly contact with the heat transfer medium flowed into heat accumulation tank body 1, inside coil pipe
The thermal pathways of a heat transfer medium are formed, heat transfer medium can be facilitated further to circulate.
Embodiment 4
The utility model embodiment provides a kind of heat-storing device, as shown in figure 4, include the heat accumulation tank body 1 for heat accumulation, it should
Heat accumulation tank body 1 is cylindrical heat storage can, the tank diameter of the heat accumulation tank body 1 and height setting depend primarily on heat accumulation temperature and
Heat storage capacity, heat accumulation tank body are cylindrical body.The two sides of heat accumulation tank body 1 are respectively arranged with heat input mouth 11 and heat delivery outlet
12, multi-layer phase change material is set in heat accumulation tank body 1, passes through multi-layer phase change material between heat input mouth 11 and heat delivery outlet 12
The gap of material forms the channel of heat transfer medium circulation, and the phase transition temperature of every layer of phase-change material is exported along heat input mouth 11 to heat
12 directions of mouth are incremented by one by one, and phase transition temperature is that the Current Temperatures of heat transfer medium are melted when reaching the fusing point of every layer of phase-change material
Temperature.Heat-storing device in the present embodiment can make the phase alternating temperature of adjacent two layers by configuring the component ratio of phase-change material
Degree difference is same threshold.
Specifically, it is made of because mentioning every layer of phase-change material in example 2 multiple block-like composite phase-change materials.It is multiple
Phase-change material is closed to be made of the phase-change material mixing of at least two heterogeneities, specifically, as shown in table 2 below,
| Composite phase-change material | Fusing point (DEG C) | Melt heat (kJ/kg-1) |
| 50%NaCl+50%MgCl2 | 273 | 429 |
| 95.4%NaCl+4.6%CaCl2 | 570 | 191 |
| LiOH+LiF | 700 | 1163 |
| 37%LiCl+63%LiOH | 535 | 485 |
| Na2CO3-BaCO3/MgO | 500-850 | 415.4 |
Table 2
Above-mentioned five kinds of composite phase-change materials are combined by two or more phase-change material of different proportion, because
For the phase-change material in the present embodiment phase transition temperature from the heat input mouth 11 of heat accumulation tank body 1 to 12 direction of heat delivery outlet by
One is incremented by, but at certain in special circumstances in order to realize more fine phase transition temperature control, to realize heat transmission
Stability, can make the phase transition temperature difference of adjacent two layers phase-change material is same threshold, in Fig. 4, the phase of adjacent two layers
Become the difference of the phase transition temperature of material as △ DEG C, the premise for guaranteeing that difference is △ DEG C is reasonably configured when making phase-change material
The component ratio of phase-change material, phase-change material herein are composite phase-change material.Such as：First phase-change material is 30%NaNO3+
30.1%KOH (sodium nitrate), second layer phase-change material are 25.6%KOH+61.4%LiOH (potassium hydroxide), third layer phase transformation material
Material is 50%LiOH+3.1%MgCl2(lithium hydroxide), the 4th layer of phase-change material are MgCl2(magnesium chloride), layer 5 phase-change material
For 64.1%NaCO3+ 2.5%NaNO3(sodium carbonate), the proportional components of this five layers of composite phase-change materials are a kind of feelings of citing
Condition can configure the phase of adjacent two layers phase-change material through a large number of experiments during post-production phase-change material
Temperature difference is same threshold.
Embodiment 5
The utility model embodiment provides a kind of heat reservoir, as shown in figure 5, including：
Heat collecting field 51 is exported for absorbing thermal energy, and by the thermal energy by heat transfer medium.Heat collecting field herein include slot type or
One or more of solar energy heat-collection fields in tower or butterfly or Fresnel.Solar energy heat-collection field is used to absorb the heat of solar radiation
Can, as energy output source, solar energy can be used as the advantageous energy of photo-thermal power generation, peomote me as renewable energy
The more photovoltaic power generations of state.
Embodiment 1, embodiment 2, embodiment 3, the heat-storing device 52 in embodiment 4, the heat using heat-storing device 52 are defeated
Entrance 11 inputs the heat transfer medium from heat collecting field 51 by pipeline, for storing thermal energy.The heat-storing device includes being used for heat accumulation
Heat accumulation tank body 1, which is cylindrical heat storage can, and the tank diameter and height of the heat accumulation tank body 1, which are arranged, mainly to be taken
Certainly in heat accumulation temperature and heat storage capacity, heat accumulation tank body 1 is cylindrical body.The two sides of heat accumulation tank body 1 are respectively arranged with heat input mouth
11 and heat delivery outlet 12, multi-layer phase change material is set in heat accumulation tank body 1, be respectively PCM1, PCM2, PCM3, PCM4,
PCM5 ... PCMn forms heat transfer medium by the gap of multi-layer phase change material between heat input mouth 11 and heat delivery outlet 12
The phase transition temperature in the channel of circulation, every layer of phase-change material is incremented by one by one along heat input mouth 11 to 12 direction of heat delivery outlet, phase
Temperature is that the Current Temperatures of heat transfer medium reach the temperature melted when the fusing point of every layer of phase-change material, PCM1, PCM2,
The corresponding phase transition temperature of PCM3, PCM4, PCM5 ... PCMn is respectively T1, T2, T3, T4, T5, Tn, wherein T1<T2<T3<T4<
T5…<Tn。
Though due to solar energy heat-collection field in the daytime can directly output continuity heat transfer medium, at night, due to too
According to being not sufficiently stable, solar radiation energy weakens sunlight, needs to configure heat-storing device 52 at this time and provides sufficiently stable sustainable heat
Can, to ensure the power grid coulomb balance of heat resource power generation, and meet high crest segment power demand.
Heat engine running equipment 53, heat transfer medium for directly being exported when heat collecting field 51 is in photo-thermal abundance by pipeline or
When heat collecting field 51 carries out energy drive by the heat transfer medium that the heat delivery outlet 12 of heat-storing device 52 exports when photo-thermal is inadequate
It is dynamic.Heat delivery outlet 12 exports the heat transfer medium from heat-storing device 52 by pipeline, for carrying out energy driving using thermal energy.
As shown in figure 5, heat engine operation hot standby 53 herein includes steam generator 531, steam turbine generator 532 and heating installation 533.It steams
The input terminal of vapour generator 531 connects the heat delivery outlet of heat-storing device 52 by pipeline, and the output end of steam generator 531 is logical
Cross connection steam turbine generator 532 and heating installation 533.So the heat that heat-storing device 52 stores may be output to by heat transfer medium
Heat engine running equipment 53 is generated electricity or is heated.
Stronger due to working as solar irradiation on daytime, photo-thermal amount is sufficient, and the heat-transfer medium temperature in heat collecting field 51 is higher,
Heat transfer medium a part of high temperature enters multi-layer phase change of the heat accumulation tank body 1 inside by the heat input mouth of heat transfer unit (HTU) 52
Material generates phase-transition heat-storage, and another part high-temperature heat-transfer medium can directly drive heat engine running equipment 53 by pipeline, this just with
Traditional photo-thermal power station is essentially identical.When night, solar irradiation was weaker, heat is inadequate, from heat collecting field 51 in pipeline
In heat-transfer medium temperature it is lower, the heat transfer medium of low temperature can not be input in heat engine running equipment 53, heat engine running equipment 53
Energy driving is carried out by the heat transfer medium that pipeline exports using the heat delivery outlet 12 of heat-storing device 52.So in the present embodiment
Heat reservoir can guarantee the continuity that photo-thermal uses using heat-storing device 52, it is ensured that the power grid coulomb balance of heat resource power generation, and
Meet high crest segment power demand.
As a kind of optional implementation, heat-storing device in the utility model embodiment, heat transfer medium include water or
Conduction oil or fuse salt.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among the protection scope created still in the utility model.
Claims (12)
1. a kind of heat-storing device, including the heat accumulation tank body for heat accumulation, it is defeated that the two sides of the heat accumulation tank body are respectively arranged with heat
Entrance and heat delivery outlet, which is characterized in that in the heat accumulation tank body be arranged multi-layer phase change material, the heat input mouth and
The channel of heat transfer medium circulation, every layer of phase transformation material are formed between the heat delivery outlet by the gap of the multi-layer phase change material
The phase transition temperature of material is incremented by one by one along the heat input mouth to heat delivery outlet direction, and the phase transition temperature is the biography
The Current Temperatures of thermal medium reach the temperature melted when the fusing point of every layer of phase-change material.
2. heat-storing device according to claim 1, which is characterized in that the heat input mouth and the heat delivery outlet point
It is not provided with first fluid pump and second fluid pump.
3. heat-storing device according to claim 1, which is characterized in that every layer of phase-change material is arranged by multiple phase-change materials of the same race
Column composition.
4. heat-storing device according to claim 3, which is characterized in that each phase-change material in every layer of phase-change material
It is made of block-like capsule fortreating AIDS, fills phase transformation object in the capsule.
5. heat-storing device according to claim 4, which is characterized in that the section of the block-like capsule fortreating AIDS includes circle
Or rectangle is one or more of trapezoidal or fan-shaped.
6. heat-storing device according to claim 1, which is characterized in that winding of spiraling is arranged in the inside of the heat accumulation tank body
Coil pipe form the channel of the heat transfer medium.
7. heat-storing device according to claim 1, which is characterized in that make the phase of adjacent two layers by composite phase-change material
Temperature difference is same threshold.
8. heat-storing device according to claim 1-7, which is characterized in that the heat accumulation tank body is cylindrical body.
9. a kind of heat reservoir, which is characterized in that including：
Heat collecting field is exported for absorbing thermal energy, and by the thermal energy by heat transfer medium；
The described in any item heat-storing devices of claim 1-8, it is described for being come from using its heat input mouth by pipeline input
The heat transfer medium of heat collecting field stores the thermal energy；
Heat engine running equipment, heat transfer medium for directly exporting when the heat collecting field is in photo-thermal abundance by pipeline or works as institute
It states heat collecting field and energy driving is carried out by the heat transfer medium that the heat delivery outlet of the heat-storing device exports when photo-thermal is inadequate.
10. heat reservoir according to claim 9, which is characterized in that the heat transfer medium includes water or conduction oil or melts
Melt salt.
11. heat reservoir according to claim 9, which is characterized in that the heat collecting field includes slot type or tower or butterfly
Or one or more of solar energy heat-collection fields in Fresnel.
12. heat reservoir according to claim 9, which is characterized in that heat engine operation is hot standby include steam generator,
Steam turbine generator and heating installation.
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| CN110131943A (en) * | 2019-04-29 | 2019-08-16 | 中国科学院广州能源研究所 | A kind of super ice-temp. fresh-preserving device and its control method |
| CN113183551A (en) * | 2020-01-14 | 2021-07-30 | 中兴能源有限公司 | Multifunctional composite phase-change film and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131943A (en) * | 2019-04-29 | 2019-08-16 | 中国科学院广州能源研究所 | A kind of super ice-temp. fresh-preserving device and its control method |
| CN113183551A (en) * | 2020-01-14 | 2021-07-30 | 中兴能源有限公司 | Multifunctional composite phase-change film and preparation method thereof |
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