CN108151568B - A kind of combined type phase change heat accumulator - Google Patents
A kind of combined type phase change heat accumulator Download PDFInfo
- Publication number
- CN108151568B CN108151568B CN201711168389.0A CN201711168389A CN108151568B CN 108151568 B CN108151568 B CN 108151568B CN 201711168389 A CN201711168389 A CN 201711168389A CN 108151568 B CN108151568 B CN 108151568B
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- phase
- heat
- storage
- storage cell
- phase change
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Classifications
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- 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
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/20—Fastening; Joining with threaded elements
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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
Abstract
The present invention provides a kind of combined type phase change heat accumulator, including storage heater shell and the upper end cover and lower cover that are arranged on storage heater shell, storage heater enclosure interior is vertically arranged the phase-transition heat-storage cell cube of several filling phase change heat storage materials, each phase-transition heat-storage cell cube center is equipped with heat exchanger tube, the diameter of phase-transition heat-storage cell cube incrementally increases from bottom to top, several phase-transition heat-storage cell cubes are connected by heat exchanger tube.Using the present invention, heat recovery efficiency can be improved, have exchange capability of heat is good, stock utilization is high, expansion is strong, and be conducive to cleaning the advantages of.
Description
Technical field
The invention belongs to heat storage technology field, in particular to a kind of multistage thermal storage unit body combined type phase change heat accumulator.
Background technique
After the oil crisis of last century the seventies, power-saving technology and new energy development become countries in the world research
Emphasis.As the important means for improving efficiency of energy utilization, energy storage technologies are on new energy field and industrial energy saving
Using the attention by various countries, during can effectively solve energy conversion and utilizing between supply and demand over time and space not
The contradiction matched, such as the intermitten service of Industrial Stoves, the peak-valley difference of electric load, solar energy, ocean energy and intermittence of wind energy etc..
Heat storage technology is a kind of important energy storage technologies, and wherein phase-transition heat-storage mode is because having energy storage density big and storage thermal process
The advantage that other heat storage types such as middle temperature stabilization hardly match, in thermal energy recycling, refrigeration low-temperature, building energy conservation, solar energy benefit
There is wider use with fields such as, aerospaces.
Shell-and-tube phase change heat accumulator is one of current main storage heater form, be can be roughly divided into two types, one kind is straight
Tubular type phase transition heat accumulation unit is limited by heat exchange area and causes the whole coefficient of heat transfer lower；Another kind of is equidistant
Helix tube has biggish advantage on heat exchange area.But due to being influenced in heat transfer process by the temperature difference exchange thermal efficiency, make
It is high in the high part heat exchange efficiency of the leading portion temperature difference of heat exchanger tube to obtain such device, and the heat exchange efficiency of back segment is then with the drop of the temperature difference
It is low and reduce, while non-uniform temperature field is easy part to heat-storing material and generates biggish supercooled and excessive heat, it may be right
The stability of long-time service has an impact.
Patent publication No. is that the Chinese patent literature of CN206601063U discloses a kind of non-equidistant helix tube phase transformation storage
Hot device, including storage heater shell and spiral heat exchange tube, spiral heat exchange tube are set in storage heater shell, the inlet tube of spiral heat exchange tube
Storage heater shell is pierced by with outlet；Heat exchanging fluid enters spiral heat exchange tube lower end by inlet tube and passes through outlet by upper end
Outflow exchanges heat；Phase change heat storage material is filled in storage heater shell；The screw pitch Unequal distance of the spiral heat exchange tube, screw pitch edge
Heat exchanging fluid flow direction gradually becomes smaller from bottom to top.By optimizing spiral spacing, the uniform of storage heater thermo parameters method is improved
Property, reduce influence of the temperature difference to the heat exchange efficiency of entire heat exchanging pipe, to improve regenerative apparatus performance.However, the accumulation of heat knot
There is " phase transformation dead zone " in phase transition process in the phase-change material of structure, the utilization rate of phase-change material is not high, meanwhile, spiral heat exchange tube
There are problems that cleaning inconvenience.
Summary of the invention
The present invention provides a kind of heat recovery efficiency height, exchange capability of heat is good, stock utilization is high, expansion is strong, and benefit
In the combined type phase change heat accumulator of cleaning.
A kind of combined type phase change heat accumulator, including storage heater shell and the upper end cover that is arranged on storage heater shell and under
End cap, storage heater enclosure interior are vertically arranged the phase-transition heat-storage cell cube of several filling phase change heat storage materials, and each phase transformation stores
Hot cell body center is equipped with heat exchanger tube, and the diameter of phase-transition heat-storage cell cube incrementally increases from bottom to top, several phase-transition heat-storage lists
First body is connected by heat exchanger tube.
Phase-transition heat-storage cell cube consists of two parts, and top is cylindrical body, lower part is horn-like curved body, more upper layer
Phase-transition heat-storage cell cube, fall horn-like curved body radius of curvature it is bigger, but the height of each phase-transition heat-storage cell cube
It is identical.Solid-liquid phase interface area when the design can increase phase-change material fusing, enhances its free convection situation, enhanced heat exchange,
It can be shortened 13.7%~38.9% fusing time, the disappearance in " phase transformation dead zone " also saves phase-change material simultaneously.
Different phase-transition heat-storage cell cubes can fill the phase change heat storage material with different phase transition temperatures.Certainly according to hot fluid
The case where lower and upper flowing, temperature constantly reduces, the phase alternating temperature of the arrangement height and phase change heat storage material of phase-transition heat-storage cell cube
Degree is inversely proportional, i.e. the lower phase-change material of the higher phase-transition heat-storage cell cube filling phase transition temperature of arrangement height, improves accumulation of heat
Device entirety heat storage capacity.
Phase change heat storage material can be the solid-liquid phase change materials such as paraffin, organic acid, fatty acid or crystalline hydrate salt.
Body, upper end cover and lower cover are equipped with insulating layer.Body is connect by bolt with upper end cover, lower cover, even
Rubber ring is equipped between junction.
The pipe internal surface that exchanges heat is equipped with internal screw thread, can be along screw thread so that when the fluid is flowing due to the presence of internal screw thread
Direction is flowed, and the boundary layer near heat exchange pipe surface, augmentation of heat transfer can be thinned in such flowing.And in flow process
Middle some fluid of meeting distributes raw collision in screw bosses, and this collision can cause the disturbance inside flow field, can also play
Destroy the effect of boundary layer and augmentation of heat transfer.
It is all by seal with elastometic washer between flange by also by upper and lower flanged joint between phase-transition heat-storage cell cube
Phase-transition heat-storage cell cube is mounted on a center line.It ensure that the reliability in use process while replacement easy to disassemble.
Transfer tube in heat exchanger tube and upper and lower end cap arranges that phase-transition heat-storage cell cube and upper and lower end cap are by spiral shell with center line
Bolt is fixed, seal with elastometic washer.
Phase-change material container unit body is facilitated the replacement of phase-change material by the present invention, while also in a disguised form increasing it
Service life.Shorter heat exchange pipeline is convenient for cleaning.Body height can be changed according to actual production life requirement, increase and decrease phase
Become thermal storage unit body number, entire phase change heat accumulator can be additionally considered as to a module and multiple phase change heat accumulator phase groups
It closes.
Advantages of the present invention and the beneficial effect of generation are that structure is simple, are easy to implement, the utilization of heat and phase-change material
Rate is high, does not have particular/special requirement to the other component of hold over system.Using have distinctive appearance and can combination collocation phase-transition heat-storage list
First body can effectively solve the problems, such as the deficiency of exchange capability of heat existing for shell-and-tube phase change heat accumulator, reduce making for phase-change material
With improving the heat storage capacity of storage heater entirety, flexibly can replace and combine makes it possess very big expansion.
Detailed description of the invention
Fig. 1 is combined type phase change heat accumulator structural schematic diagram of the present invention；
Fig. 2 is first order phase change thermal storage unit body structural schematic diagram.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing:
As shown in Figure 1, a kind of combined type phase change heat accumulator, including upper end cover transfer tube (1), upper end cover flange (2), upper end
Cover (3), body (4), phase change heat storage material (5), first order phase change thermal storage unit body (6), phase-transition heat-storage cell cube lower flange (7),
Second-order phase transistion thermal storage unit body (8), bolt (9), phase-transition heat-storage cell cube upper flange (10), three-level phase-transition heat-storage cell cube
(11), internal screw thread heat exchanger tube (12), level Four phase-transition heat-storage cell cube (13), lower cover (14), lower cover transfer tube (15).Phase transformation
It is filled in thermal storage unit body phase change heat storage material (5), the phase change heat storage material (5) can be paraffin, organic acid, fat
The solid-liquid phase change materials such as acid, crystalline hydrate salt.
As shown in Fig. 2, being the structural schematic diagram of first order phase change thermal storage unit body (6), phase-transition heat-storage cell cube is by a circle
Cylinder and a horn-like curved body are constituted.Phase-transition heat-storage cell cube upper flange (10) are arranged in cylindrical body upper end, horn-like
Phase-transition heat-storage cell cube lower flange (7) are arranged in curved body lower end.
From bottom to top, the height with curvature of the horn-like curved body of different phase-transition heat-storage cell cubes are different, phase-transition heat-storage
The curvature of the horn-like curved body of cell cube is gradually increased, but the sum of cylinder height and horn-like curved body height are
Fixed value.
The fillable phase change heat storage material (5) with different phase transition temperatures of different phase-transition heat-storage cell cubes.According to hot fluid
It flows from bottom to top, the case where temperature constantly reduces, the higher phase-transition heat-storage cell cube filling phase transition temperature of arrangement height is lower
Phase change heat storage material (5), improve storage heater entirety heat storage capacity.
Hot fluid enters internal screw thread heat exchanger tube by lower end, flows out from upper end, and heat is passed to respectively by internal screw thread heat exchanger tube
Grade phase-transition heat-storage cell cube, the phase-change material (5) in cell cube gradually become liquid by solid-state, thermal energy are made constantly to be converted into latent heat
It is stored in phase change heat storage material.
The solid-liquid phase interface of phase-change material (5) fusion process in phase-transition heat-storage cell cube of the invention is than in same volume
Area in traditional cylindrical cell cube is big, and Effect of Nature Convection is stronger, and maximum free convection intensity can enhance 0.2~1 times,
Phase-change material (5) internal heat transfer effect is more preferable.The phase transformation for being difficult to melt of traditional cylindrical cell cube lower end is also not present simultaneously
Dead zone improves the utilization rate of phase-change material well.
It is sealed by flanged joint between cell cube and cell cube and added with rubber ring, while replacement easy to disassemble
It ensure that the reliability in use process.
The foregoing is merely preferable implementation examples of the invention, are not intended to restrict the invention, it is all in spirit of that invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of combined type phase change heat accumulator, including storage heater shell and the upper end cover being arranged on storage heater shell and lower end
Lid, which is characterized in that storage heater enclosure interior is vertically arranged the phase-transition heat-storage cell cube of several filling phase change heat storage materials, often
A phase-transition heat-storage cell cube center is equipped with heat exchanger tube, the heat exchange pipe internal surface equipped with internal screw thread, phase-transition heat-storage cell cube it is straight
Diameter incrementally increases from bottom to top, several phase-transition heat-storage cell cubes are connected by heat exchanger tube；
Each phase-transition heat-storage cell cube consists of two parts, and top is cylindrical body, lower part is horn-like curved body, more upper layer
Phase-transition heat-storage cell cube, fall horn-like curved body radius of curvature it is bigger；
The height of several phase-transition heat-storage cell cubes is all identical；Several phase-transition heat-storage cell cubes filling phase transformation stores
The mode of hot material are as follows: the arrangement height of phase-transition heat-storage cell cube and the phase transition temperature of phase change heat storage material are inversely proportional.
2. combined type phase change heat accumulator according to claim 1, which is characterized in that storage heater shell, upper end cover and under
End cap is equipped with insulating layer.
3. combined type phase change heat accumulator according to claim 1, which is characterized in that storage heater shell passes through bolt and upper end
Lid, lower cover connect, and rubber ring is equipped between joint face.
4. combined type phase change heat accumulator according to claim 1, which is characterized in that several described phase-transition heat-storage units
Also by upper and lower flanged joint between body, pass through seal with elastometic washer between flange.
5. combined type phase change heat accumulator according to claim 1, which is characterized in that several described phase-transition heat-storage cell cubes
It is mounted on a center line.
6. combined type phase change heat accumulator according to claim 1, which is characterized in that the phase change heat storage material is stone
Wax, organic acid or crystalline hydrate salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711168389.0A CN108151568B (en) | 2017-11-21 | 2017-11-21 | A kind of combined type phase change heat accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711168389.0A CN108151568B (en) | 2017-11-21 | 2017-11-21 | A kind of combined type phase change heat accumulator |
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| Publication Number | Publication Date |
|---|---|
| CN108151568A CN108151568A (en) | 2018-06-12 |
| CN108151568B true CN108151568B (en) | 2019-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711168389.0A Active CN108151568B (en) | 2017-11-21 | 2017-11-21 | A kind of combined type phase change heat accumulator |
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|---|---|---|---|---|
| CN111278256B (en) * | 2019-12-31 | 2021-09-21 | 南京理工大学 | Phase change heat storage device based on convection heat transfer |
| CN111637774B (en) * | 2020-05-09 | 2021-10-19 | 东南大学 | Multi-heat-storage-tank heat storage phase-change heat exchanger with flow guiding function |
| CN111998712B (en) * | 2020-09-07 | 2023-05-09 | 长兴（广州）光电材料有限公司 | Pipeline energy storage heating device based on waste gas waste heat recovery and recycling |
| CN112211938B (en) * | 2020-09-29 | 2021-06-15 | 清华大学 | Magnetic liquid vibration damper for outer space |
| CN112414193B (en) * | 2020-12-22 | 2022-04-22 | 华北电力大学 | Multi-cascade phase change heat storage device with built-in fins and enhanced heat transfer method |
| CN113921856A (en) * | 2021-10-15 | 2022-01-11 | 西南石油大学 | Solid oxide fuel cell external thermal management system and method based on phase change material |
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| DE202010004400U1 (en) * | 2010-03-31 | 2010-06-17 | Sgl Carbon Se | Foil arrangement for a heat storage and heat storage with this film arrangement |
| CN203024632U (en) * | 2012-12-27 | 2013-06-26 | 河北科技大学 | Combined type phase-change material heat storing and heat transferring unit pipe |
| CN104019686A (en) * | 2014-06-05 | 2014-09-03 | 上海交通大学 | Efficient phase change cold storage heat exchange tube |
| CN105115340A (en) * | 2015-09-09 | 2015-12-02 | 江苏宝奥兰空调设备有限公司 | Phase change heat storage device and heat-pump water heater |
| CN106247837A (en) * | 2016-09-26 | 2016-12-21 | 苏州科技大学 | A kind of bucket shape phase-transition heat-storage component |
| CN206601063U (en) * | 2017-03-20 | 2017-10-31 | 中国科学技术大学 | A kind of non-equidistant helix tube phase change heat accumulator |
-
2017
- 2017-11-21 CN CN201711168389.0A patent/CN108151568B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202010004400U1 (en) * | 2010-03-31 | 2010-06-17 | Sgl Carbon Se | Foil arrangement for a heat storage and heat storage with this film arrangement |
| CN203024632U (en) * | 2012-12-27 | 2013-06-26 | 河北科技大学 | Combined type phase-change material heat storing and heat transferring unit pipe |
| CN104019686A (en) * | 2014-06-05 | 2014-09-03 | 上海交通大学 | Efficient phase change cold storage heat exchange tube |
| CN105115340A (en) * | 2015-09-09 | 2015-12-02 | 江苏宝奥兰空调设备有限公司 | Phase change heat storage device and heat-pump water heater |
| CN106247837A (en) * | 2016-09-26 | 2016-12-21 | 苏州科技大学 | A kind of bucket shape phase-transition heat-storage component |
| CN206601063U (en) * | 2017-03-20 | 2017-10-31 | 中国科学技术大学 | A kind of non-equidistant helix tube phase change heat accumulator |
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| CN108151568A (en) | 2018-06-12 |
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