CN104949558A - Energy storage device - Google Patents
Energy storage device Download PDFInfo
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- CN104949558A CN104949558A CN201510353589.8A CN201510353589A CN104949558A CN 104949558 A CN104949558 A CN 104949558A CN 201510353589 A CN201510353589 A CN 201510353589A CN 104949558 A CN104949558 A CN 104949558A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention relates to an energy storage device. The energy storage device comprises a heat energy input system, an energy storage box, a heat energy output system and a control system. The heat energy input system is used for collecting heat energy and transferring the heat energy to heat conduction flowing mediums, and the heat conduction flowing mediums are guided into the energy storage box. Heat storage bars are evenly distributed in the energy storage box and filled with phase-change materials, a heat conduction flowing medium circulating system is arranged on the energy storage box, the heat conduction flowing mediums circulate in the heat conduction flowing medium circulating system, the energy storage box can be filled with the heat conduction flowing mediums, and the heat conduction flowing mediums cyclically flow in the energy storage box. The heat energy output system is used for guiding the heat conduction flowing mediums out of the energy storage box. The control system is used for controlling cyclic flow of the heat conduction flowing mediums and collection and output of heat energy. The energy storage device can effectively recycle industrial waste heat or solar energy, and conversion between the heat energy and chemical energy is achieved through the phase-change materials.
Description
Technical field
The present invention relates to energy recovery technical field, be specifically related to a kind of by the energy storage device of waste heat recovery.
Background technology
Along with the raising of day and night shortage and people's awareness of saving energy of global energy, in order to realize better supply and demand time match in using energy source, all over the world just at the heat energy energy storage technology that active development is novel.Current heat energy energy storage technology is mainly divided into water accumulation of heat and solid material accumulation of heat two kinds according to carrier difference.
So-called water accumulation of heat is exactly that water is heated to certain temperature, makes heat energy store in water with the form of sensible heat, when it is desired to be used, then is discharged and provides heating or directly for people to use as hot water.In general, the regenerator temperature of water is within the scope of 40 ~ 100 DEG C.Different according to use occasion, for domestic water, regenerator temperature is 40 ~ 70 DEG C, directly can provide use; For drinking water, can store to 100 DEG C; Be the air-conditioning system of fan coil for end, general regenerator temperature is 90 ~ 98 DEG C; Be the heating system of radiator for end, regenerator temperature is 90 ~ 100 DEG C or higher.But the shortcoming of water heat accumulation takies that construction area is large, the thermal efficiency is low, owing to there is the restriction of 100 DEG C of temperature in water heat accumulation simultaneously, cannot use the industry heat application that temperature requirement is about 200 DEG C.
In the application of industry heat, solid material carrier regenerator is ideal and feasible, and the selection that phase-change material accumulation of heat is best in solid material accumulation of heat especially.Solid material accumulation of heat machine is by phase-change material accumulation of heat.Phase-change thermal storage is the one in solid material, by absorbing (release) in phase-change material phase transformation (solid solid-liquid or solid-) process, amount of heat realizes power conversion for it, and its energy storage density is large, efficiency is high, suction exothermic process almost carries out under isothermal conditions.Stored energy can come by it, is being discharged when needs energy.Study by phase-change material heat accumulation is existing both at home and abroad, and relative maturity.
In prior art, phase-change thermal storage is realized by phase change material device.Common phase change material device is all by recovering energy flowing can be heated to uniform temperature by heat medium (as mineral oil) usually, imports in energy storage casing.Be contained with phase-change material (as fuse salt phase-change material) in energy storage casing, flowing can heat medium by heat conduction to phase-change material, make its occur melting change (as solid phase becomes liquid phase) heat is become chemical energy store.During release heat, solidification change (liquid phase becomes solid phase) occurs, phase-change material transfers heat to flowing heat-conducting medium and takes away.
Be called that compound provides a kind of device utilizing phase-change material energy storage in the Chinese utility model patent of phase-change energy storage device as the patent No. is 201220468883.5.Comprise heat storage can packaging phase change material in this patent, distribution conduit in heat storage can, lead Bottomhole pressure heat-conducting medium.Heat-conducting medium passes to phase transformation heat by conduit or absorbs the heat of phase-change material release.The heat-storing device provided in this patent has following several shortcoming: 1, heat-conducting medium is by conduit and phase change material contacts heat-shift, and the limited exotherm rate of contact area is slow, accumulation of heat speed is slow.Although conduit have employed snakelike stringing, appoint the emission and absorption that so fully can not realize energy; 2, phase-change material is wrapped up in and is paid in conduit surrounding, and because phase-change material crystal phase structure after repeatedly heating changes, material generation consolidation, on conduit, meeting consolidation one deck can not realize the heat conduction between the material obstruction heat-conducting medium of phase transformation and phase-change material.
Be 201310025636.7 in the patent No. and be called the technical scheme providing a kind of improvement in a kind of Chinese utility model patent of heat-storing device.It remains and realizes heat transmission by the heat-transfer device in conduit, and conduit is set to the serpentine duct spiraled upwards try hard to increase heat transfer area.Improvement is between conduit and phase-change material, be provided with liquid researching of sensible heat storage material.Attempt to fill the gap of heat storage can by liquid researching of sensible heat storage material, to reach the even transmission of heat in whole heat storage can, prevent hardening of on conduit phase-change material.But shortcoming is also significantly subtract greatly through twice phase change transition heat transfer efficiency.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of energy storage device, its objective is and a kind of energy storage device that effectively can reclaim industrial exhaust heat or solar energy is provided, being realized the mutual conversion of heat energy and chemical energy by phase-change material.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of energy storage device, comprising:
Heat energy input system, described heat energy input system passes to conduction heat flow medium for collecting heat energy and imports in energy-storage box by conduction heat flow medium;
Energy-storage box, heat accumulation rod is evenly laid with in described heat storage box, phase-change material is filled with in described heat accumulation rod, heat storage box is provided with conduction heat flow medium circulation system, in described conduction heat flow medium circulation system, circulation has conduction heat flow medium, and described conduction heat flow medium can be filled in heat storage box and also realize circulating;
Heat energy output system, described heat energy output system is used for conduction heat flow medium to derive energy-storage box;
And
Control system, for controlling circulating and the collection of heat energy, output of conduction heat flow medium.
In the present invention, be carried out collecting by heat energy by heat energy input system and carry out heat temperature raising to conduction heat flow medium, the conduction heat flow medium after intensification will pass in energy-storage box, and energy-storage box is the device of thermal energy storage, thermal energy storage device by realization to heat storage.Energy-storage box mainly contains phase-change material and conduction heat flow medium circulation system composition.Especially, the phase-change material in energy-storage box is stored in heat accumulation rod, and will be full of the conduction heat flow medium of flowing outside heat accumulation rod, realizes the transmission of heat energy.In the present invention, conduction heat flow medium is not by conduit, but is contained within outside heat accumulation rod.In the present invention, conduction heat flow medium circulates, and realizes recycling.Simultaneously because phase-change material is sealed up for safekeeping in heat accumulation rod, prevent from, to the pollution of conduction heat flow medium, using for a long time.
The circulatory system in technique scheme is realized by rational conduction heat flow media flow mode.Wherein energy-storage box comprises casing, described casing is provided with conduction heat flow medium input port and output port, and conduction heat flow medium can be full of in casing and to realize circulation by conduction heat flow medium input port and output port.Conduction heat flow medium is flowed in energy storage casing by conduction heat flow medium input port.Conduction heat flow medium will be full of in energy storage casing.Conduction heat flow medium fully will contact with energy storage bar and realize exchange energy.
Further, the top of described casing and bottom are provided with conduction heat flow medium cavity, and the conduction heat flow medium cavity described in described casing is provided with through hole, and conduction heat flow medium can flow out in casing by the described through hole of common mistake.Described conduction heat flow medium cavity in the present invention and casing one, but be not limited to be cavity body structure, also can be conduit.Conduction heat flow medium cavity communicates with inside cavity.Conduction heat flow medium can flow into from the conduction heat flow medium cavity at top and be full of casing, and is flowed out by the conduction heat flow medium cavity of bottom.And top conduction heat flow medium cavity is symmetricly set in casing top, conduction heat flow medium flows out in casing by described through hole.
Further, described conduction heat flow medium input port is connected with current divider, conduction heat flow medium cavity is symmetrical arranged, conduction heat flow medium flows in the symmetrically arranged flow media cavity in casing top by current divider, and on described conduction heat flow medium cavity, through hole is laid relatively, makes conduction heat flow medium flow in opposite directions and realizes convection current.By current divider by conduction heat flow medium shunt, and make the conduction heat flow medium after shunting obtain certain kinetic energy, conduction heat flow medium is flowed in the symmetrically arranged flow media cavity in top by current divider, and on described conduction heat flow medium cavity, through hole is laid relatively.Conduction heat flow medium can produce convection current, and uniformly across the space between heat accumulation rod toward current downflow, is full of casing.
Preferably, described heat conductive rod becomes honeycomb building to arrange in described casing.In the present invention, the laying of heat conductive rod is gathered to reach maximum space.And the gap between heat conductive rod is filled with conduction heat flow medium, by technical scheme above, the abundant filling between gap can be realized.Pay close attention to, because top conduction heat flow medium is convection current, such conduction heat flow medium can produce downward flowing pressure to reach abundant flowing.
Further, the bottom of described casing is provided with oil catcher, and conduction heat flow medium flows in oil catcher and imports in the flow media cavity of bottom half.In order to form the flowing of effective conduction heat flow medium circulation, an oil catcher is provided with in the bottom of casing, the conduction heat flow medium collection that can effectively will stay from top, import again after collection in the bottom conduction heat flow medium cavity of casing and derive energy-storage box, and heat is derived heat energy output system.And bottom conduction heat flow medium cavity can realize replacing by conduit.
Preferably, described heat energy input system can be electric boiler heat collector, solar energy heat collector, industrial afterheat recovery regenerative apparatus one wherein.
Preferably, described heat storage box is packaged type heat storage box.
Preferably, described control system comprises sensing detection element, motor-driven valve and system control cabinet.Sensor detecting element, can to the temperature of box house, and the conduction heat flow medium of the conduction heat flow medium cavity in inflow casing and outflow casing carries out monitoring temperature.And by the outflow of electric valve control conduction heat flow medium and outflow, and then control temperature and the energy conversion efficiency of conduction heat flow medium.
By technique scheme, energy storage device provided by the invention, its beneficial effect is:
There is provided a kind of phase-change material in heat accumulation rod, heat accumulation rod is outward the thermal energy exchange mode of conduction heat flow medium.The thermal energy exchange of this mode must can realize effective energy exchange by the endless form improving conduction heat flow medium.Heat storage box body changes body structure to adapt to the cellular arrangement of heat accumulation rod in the present invention, and the cellular arrangement of heat accumulation rod makes there is sufficient gap between heat accumulation rod.And between gap and gap, be densely covered with conduction heat flow medium, and be filled with conduction heat flow medium in order to make between gap.Redesign the circulatory system having conduction heat flow medium.Be provided with conduction heat flow medium cavity at the top of casing and bottom, the conduction heat flow media implementation convection current of the conduction heat flow medium cavity at top produces downward flowing pressure, can be full of gap.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.
Fig. 1 is the structural representation in the present invention in embodiment two;
Fig. 2 is the structural representation of energy-storage box in the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Conduction heat flow medium is in an embodiment of the present invention conduction oil, and phase change medium is the mixture that fuse salt is specially the binary salt of NaNO3, KNO3.Fused salt is deposited in heat accumulation rod, maintains static.And conduction oil is as Heat Conduction Material, flow outward at heat accumulation rod, reach the importing of heat and the object of derivation.
Embodiment one as shown in Figure 1,
A kind of energy storage device, comprising:
Electric furnace 1, this electric furnace 1 is provided with the output port of conduction oil, conduction oil through electric furnace 1 heat after by conduit and separator UNICOM, conduction oil flows in the conduction oil cavity 2 at the top in energy-storage box 4 by separator shunting, the conduction oil cavity 2 at top is arranged symmetrically with, and the conduction oil cavity 2 at top is provided with through hole, form the conduction oil that flows in opposite directions and form the pressure of downward flowing.The bottom of casing is provided with conduction oil cavity 3 and is connected with oil catcher, the conduction oil that described oil catcher can flow to bottom is collected and flowed out energy-storage box 4 inflows by conduction oil cavity 3 can in equipment, while energy-storage box 4 be equipped with circulating pump to realize conduction oil in electric furnace 1, energy-storage box 4 and the circulation with energy equipment.
Cellularly in heat storage box 4 be provided with heat accumulation rod 5, in described heat accumulation rod, be filled with phase-change material.In heat storage box 4, the arrangement of heat accumulation rod is cellular arrangement, reduces gap between heat accumulation rod to greatest extent, to reduce costs.In the cellular arrangement of heat accumulation rod, will be one group with 169 heat accumulation rods and slim band iron ties, longitudinally be positioned in energy-storage box.
It is noted that due in heat exchanging process fuse salt will expand, if heat accumulation rod is filled in heat exchanging process can make fuse salt extrude heat accumulation rod.Therefore first heat accumulation rod body is heated when filling in the process of fuse salt to heat accumulation rod.Seamless steel pipe is selected and heating and melting salt filling also sealed steel pipe two ends in the present embodiment.When volume reduces after fuse salt cooling, seal cavity is retained fully.
In the present embodiment, energy-storage box volume is that long 1.5 meters of * moneys 1 meter of * is high 1.5 meters.
According to calculating, according to calculating, amount to by 13 groups of complete heat accumulation rod groups, total heat accumulation rod quantity is 2888, and often propping up length is 1.4 meters.
Intrasystem fused salt weight is: 2.19 tons.
System module energy storage capacity is calculated as follows:
Energy-storage box size: 1500 (L) * 1000 (W) * 1500 (H)
Storage salt rod size: DN20, wall thickness 1.5mm, often props up length 1400mm.
Storage salt rod, for being longitudinally installed in energy-storage box, respectively reserving 50mm space up and down and circulates for conduction oil.
Often prop up the amount that storage salt rod stores salt:
0.01*0.01*3.14*1.4＝0.0004396CBM
Storage salt rod quantity:
169*14 – 2 (15+14)+5*96 – 5+21*5=2888 props up
The storage salt storable fused salt cumulative volume of rod and weight:
Volume: 2888*0.0004396=1.2695648CBM
Weight: 1.2695648*1.725Ton/CM=2.19Ton
Conduction oil volume and weight:
Volume: 1.5*1*1.5 – 1.2696 – 0.101=0.8794CBM
Weight: 0.8794*0.9=0.7915Ton
Storage salt rod steel weight:
2888M* (3.14*0.0215*0.0015*1*7800) KG/M=0.789867Ton (DN20 seamless steel pipe, wall thickness 1.5)
Energy storage capacity calculates:
Energy storage calculation assumption condition:
Temperature of molten salt changes: be down to 100 degree for 300 degree.
Conduction oil variations in temperature: be down to 80 degree for 300 degree
Temperature of steel pipe changes: be down to 80 degree for 300 degree
Molten salt energy-storage: 38.5Kcal/KG*2190KG+0.37Kcal/KG degree * 2190KG*200 degree=84,315+162,060=246,375Kcal
Conduction oil energy storage: 0.55Kcal/KG degree * 791.5KG*220 degree=95,772Kcal
Storage salt bar steel material energy storage: 450J/KG degree/4180*790KG*220 degree=18,711Kcal
Total energy storage: 360,918Kcal
Can to be stored in a large amount of heats in energy-storage box and to utilize conduction oil as heat exchange carrier by above-mentioned technical scheme, the heat storage obtained by paddy electrical heating, Columnating type solar collector or other industrial waste heat gathering-devices in the mixture of the binary salt of NaNO3, KNO3, regenerator temperature is 300 DEG C.When with when using, then need being discharged and be supplied to commercial Application, or civilian in heating and bathing and domestic water use, the serviceability temperature that output is pressed can adopt different heat exchange mode settings.
The mentality of designing of upper entering and lower leaving is adopted in the present embodiment.Energy-storage box top and bottom by the cavity of each formation 50mm, as the path of conduction oil.Deep fat to fuel feed pump enters after energy-storage box top portion is distributed in the separator of both sides, apex cavity is entered by the perforate in the middle part of separator horizontal level, conduction heat flow medium cavity 2 is symmetricly set in the both sides of heat storage box, conduction oil flows in flow media chamber 2 body at top by current divider, and on described conduction heat flow medium cavity, through hole is laid relatively, makes conduction oil flow in opposite directions and realizes convection current.Conduction oil toward current downflow uniformly across the space between heat accumulation rod, arrives bottom energy-storage box and concentrates, and enter oil catcher by the perforate of the oil catcher bottom energy-storage box, be then back to return line.The closed circuit design of this conduction oil, can guarantee that conduction oil is as far as possible even in cyclic process, avoid forming dead angle in energy-storage box.
Conduction oil is through recycling heat energy output system, and described heat energy output system is used for conduction heat flow medium to derive energy-storage box;
Heat accumulation casing is in the present embodiment provided with temperature sensor, arranges and the input of conduction oil respectively, in the casing of energy-storage box and the output of conduction oil, the temperature in real time in the whole energy storage device of monitoring.
Control system, for controlling circulating and the collection of heat energy, output of conduction heat flow medium.Control system, by carrying out operation monitoring, parameter modification, data acquisition etc. to system, allows user better be served.Content easily extensible, parameter can be revised, and realize integrated with the control of building system by communication interface, investment reduction, convenient management.
Embodiment two,
The basis of embodiment one is improved technical scheme.
The basis of embodiment one increases solar energy interface, for collecting solar heat and waste heat recovery.The primary input end of system heat energy is electrothermal furnace, and electrothermal furnace heating conduction oil, is stored exchange heat to after heat accumulation rod by conduction oil.Meanwhile, conduction oil also directly can export heat energy to output.Meanwhile, system access reserves the input of two heat energy, and an input as Columnating type solar collector, another is as the thermal input of industrial waste heat gathering-device.
The above-mentioned explanation of disclosed embodiment of this invention, enables professional and technical personnel in the field realize or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. an energy storage device, is characterized in that, comprising:
Heat energy input system, described heat energy input system passes to conduction heat flow medium for collecting heat energy and imports in energy-storage box by conduction heat flow medium;
Energy-storage box, heat accumulation rod is evenly laid with in described heat storage box, phase-change material is filled with in described heat accumulation rod, heat storage box is provided with conduction heat flow medium circulation system, in described conduction heat flow medium circulation system, circulation has conduction heat flow medium, and described conduction heat flow medium can be filled in heat storage box and also realize circulating;
Heat energy output system, described heat energy output system is used for conduction heat flow medium to derive energy-storage box;
And
Control system, for controlling circulating and the collection of heat energy, output of conduction heat flow medium.
2. a kind of energy storage device according to claim 1, it is characterized in that, described energy-storage box comprises casing, described casing is provided with conduction heat flow medium input port and output port, conduction heat flow medium can be full of in casing and to realize circulation by conduction heat flow medium input port and output port.
3. a kind of energy storage device according to claim 2, is characterized in that, the top of described casing and bottom are provided with conduction heat flow medium cavity, and described conduction heat flow medium cavity is provided with through hole.
4. a kind of energy storage device according to claim 3, it is characterized in that, described conduction heat flow medium input port is connected with current divider, described current divider is distributed in both sides, casing top, conduction heat flow medium cavity is symmetricly set in the both sides of heat storage box, conduction heat flow medium is flowed in the flow media cavity at top by current divider, and on described conduction heat flow medium cavity, through hole is laid relatively, conduction heat flow medium is flowed in opposite directions and realizes convection current.
5., according to the arbitrary described a kind of energy storage device of claim 2 to 4, it is characterized in that, described heat conductive rod becomes honeycomb building to arrange in described casing.
6., according to the arbitrary described a kind of energy storage device of claim 3 to 4, it is characterized in that, the bottom of described casing is provided with oil catcher, and conduction heat flow medium flows in oil catcher and imports in the flow media cavity of bottom half.
7. a kind of energy storage device according to claim 6, is characterized in that, described heat energy input system can be electric boiler heat collector, solar energy heat collector, industrial afterheat recovery regenerative apparatus one wherein.
8. a kind of energy storage device according to claim 6, is characterized in that, described heat storage box is packaged type heat storage box.
9. a kind of energy storage device according to claim 6, is characterized in that, described control system comprises sensing detection element, motor-driven valve and system control cabinet.
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Cited By (5)
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| CN106288510A (en) * | 2016-07-27 | 2017-01-04 | 重庆京天能源投资（集团）股份有限公司 | Provide multiple forms of energy to complement each other energy integration supply system |
| CN106595083A (en) * | 2016-12-26 | 2017-04-26 | 中国石油天然气股份有限公司 | Solar energy phase change heat storage and exchange device and method |
| CN108444327A (en) * | 2018-03-29 | 2018-08-24 | 东南大学 | A kind of structure carrying out heat accumulation using conduction oil and heat accumulation stick |
| CN109373433A (en) * | 2018-11-12 | 2019-02-22 | 西藏藏建科技股份有限公司 | A kind of energy storage device |
| CN110044197A (en) * | 2019-04-11 | 2019-07-23 | 东南大学 | A kind of heat storage container |
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| CN110044197A (en) * | 2019-04-11 | 2019-07-23 | 东南大学 | A kind of heat storage container |
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Application publication date: 20150930 |