CN207797837U - Multi-level phase change heat-storing device - Google Patents
Multi-level phase change heat-storing device Download PDFInfo
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- CN207797837U CN207797837U CN201820116662.9U CN201820116662U CN207797837U CN 207797837 U CN207797837 U CN 207797837U CN 201820116662 U CN201820116662 U CN 201820116662U CN 207797837 U CN207797837 U CN 207797837U
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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 utility model discloses a kind of multi-level phase change heat-storing devices, it is arranged between heat source medium and low-temperature receiver medium, it is gradually risen including phase transition temperature, the first order phase change heat-storing device of setting parallel with one another (4), second-order phase transistion heat-storing device (5) and three-level phase change material device (6), for receiving heat source and opening and closing level-one, two level, three-level phase change material device accordingly according to the phase transition temperature of phase-change material in the temperature of heat source medium and itself to carry out heat accumulation, and the local heat supply needed respectively to different temperatures.The multi-level phase change heat-storing device of the utility model, pass through latent heat of phase change principle, make full use of the latent heat heat accumulation of phase-change material, heat accumulation space is big, and occupation of land is minimum, can be changed according to different temperatures and carry out multistage heat accumulation respectively, has the effect of multilevel energy cascade utilization, the quality for substantially increasing heat accumulation efficiency and heat utilizes, while having simple system, easy to operate feature.
Description
Technical field
The utility model is related to thermoelectricity energy storage device technical field more particularly to a kind of multi-level phase change heat-storing devices.
Background technology
In recent years, China's wind-powered electricity generation and photovoltaic installation scale rapidly increase, and have occupied the first in the world building installed capacity.One
The new energy such as aspect, wind-powered electricity generation and photovoltaic be we provide a large amount of clean electric powers, on the other hand, the randomness of generated output and
Unstability also brings huge challenge to the safe operation of electric system and supply of electric power guarantee.From the point of view of present case,
China's electric system regulating power be difficult to completely adapt to new energy extensive development and consumption requirement, some areas occur compared with
Wind is abandoned, light is abandoned and abandons water problems to be serious.
Thermoelectricity especially coal motor group is still main force's power supply in China in following considerably long one period.By to coal electricity
Transformation of Unit discharges its potential flexibility, can effectively improve China's electric system regulating power, is that China promotes high efficiency smart
The important content of electric system construction.
And heat-storing device has correctional effect apparent as one kind in thermoelectricity decoupling technology in thermoelectricity flexibility transformation
The characteristics of.After steam power plant configures heat-storing device, can daytime power load it is high, heating demand is low when, unit is meeting thermic load
On the basis of demand, further steam extraction is by heat storage in heat-storing device；It, will when night electric load is low, heating demand is high
The heat for being stored in heat-storing device releases and undertakes a part of thermic load.In the case where user side thermic load is constant, heat accumulation dress
The thermic load for setting adjustable unit reduces unit thermic load at night, and unit generation output adjustable extent increases therewith, centainly
Constraint of the thermic load to generated output is reduced in degree.
According to unit heat capacity, the difference of heat-storing device heat storage capacity and thermic load situation, different operations can be used
Mode mainly has：Waist lotus period heat accumulation, low-valley interval heat release；Spike, waist lotus period heat accumulation, low-valley interval heat release；The spike period
Heat accumulation, waist lotus, low-valley interval heat release.No matter which kind of method of operation, as long as spike, waist lotus period can store enough heat
Amount, you can reduce generated output as far as possible to minimum level in low-valley interval, effectively improve peak modulation capacity.
Heat-storing device mainly has two kinds of embodiments of water heat storage can and solid heat storage device at present, though water heat storage can cost compared with
It is low, but space is larger, and high-temperature heat-storage cannot be carried out；Though solid heat storage device is compact-sized, heat transfer efficiency is relatively low, and
Cost is higher, while two kinds of heat accumulation modes are sensible heat heat accumulation, and heat storage capacity is smaller.
Invention content
The purpose of this utility model is to provide one kind capable of changing the multistage heat accumulation respectively of progress according to different temperatures, has
The multi-level phase change heat-storing device of the effect of multilevel energy cascade utilization.
To achieve the above object, the specific technical solution of the multi-level phase change heat-storing device of the utility model is：
A kind of multi-level phase change heat-storing device, be arranged between heat source medium and low-temperature receiver medium, include at least phase transition temperature by
Edge up height, the first order phase change heat-storing device of setting parallel with one another, second-order phase transistion heat-storing device and three-level phase change material device, is used for
Heat source is received, the phase-change material of different phase transition temperatures is both provided in each phase change material device, according to the temperature of heat source medium
And in heat-storing device the phase transition temperature of phase-change material open accordingly in level-one, two level, three-level phase change material device one with
Heat accumulation is carried out, and leads to low-temperature receiver medium to its heat supply.
Further, the entrance of each phase change material device is both provided with temp.-control valve, and temp.-control valve is for detecting heat source
The temperature of medium is simultaneously compared with the temperature of phase-change material and is turned on and off phase change material device with corresponding.
Further, the phase transition temperature of phase-change material is 50-180 DEG C in first order phase change heat-storing device.
Further, the phase transition temperature of phase-change material is 100-350 DEG C in second-order phase transistion heat-storing device.
Further, the phase transition temperature of phase-change material is 260-700 DEG C in three-level phase change material device.
Further, be both provided with heat transfer coils in each phase change material device, heat transfer coils using spiral fin coil and/or
H-type finned tube.
Further, phase-change material can be used middle low-temperature phase-change material, middle low-temperature phase-change material include hydrate, organic matter and
High molecular material.
Further, high temperature phase change material (pcm) can be used in phase-change material, and high temperature phase change material (pcm) includes fuse salt and metal alloy.
The advantages of multi-level phase change heat-storing device of the utility model, is：
1) by latent heat of phase change principle, the latent heat heat accumulation of phase-change material is made full use of, heat accumulation space is big, and occupation of land is minimum, can
Changed according to different temperatures and carry out multistage heat accumulation respectively, have the effect of multilevel energy cascade utilization, substantially increases heat accumulation effect
Rate and the quality of heat utilize, while having simple system, easy to operate feature；
2) waste heat for being suitable for having different qualities when thermal power plant's flexibility peak regulation transformation, when thermal power plant needs flexibility peak regulation
When, it can be according to the corresponding phase change material device for opening respective stages of temperature of Power Plant Heat Source medium (electricity, steam or hot water)
Valve carries out heat accumulation, and the quality for improving heat utilizes, and is furnished with temp.-control valve, effectively avoids phase-change material overheat heat accumulation,
The case where heat resources waste, it is with good economic efficiency；
3) heat that can need to extract respective stages according to temperature respectively, achievees the purpose that cascade utilization.
Description of the drawings
Fig. 1 is the structural schematic diagram of the multi-level phase change heat-storing device of the utility model.
Specific implementation mode
In order to be better understood by the purpose of this utility model, structure and function, below in conjunction with the accompanying drawings, to the utility model
Multi-level phase change heat-storing device does further detailed description.
As shown in Figure 1, it is shown as the multi-level phase change heat-storing device of the utility model, it is arranged in heat source medium and low-temperature receiver medium
Between, low-temperature receiver medium can be water, steam or other need for hot medium, gradually risen including at least phase transition temperature, mutually simultaneously
First order phase change heat-storing device 4, second-order phase transistion heat-storing device 5 and the three-level phase change material device 6 for joining setting, for receiving heat source,
It is both provided with the phase-change material of different phase transition temperatures in each phase change material device, is filled according to the temperature of heat source medium and heat accumulation
The phase transition temperature for setting interior phase-change material opens in level-one, two level, three-level phase change material device one to carry out heat accumulation accordingly, and
Lead to low-temperature receiver medium to its heat supply, to achieve the purpose that cascade utilization.The utility model is by being arranged in heat source medium and low-temperature receiver
Heat-storing device heat exchange between medium, realizes and take the heat of heat source medium for the utilization of low-temperature receiver medium out of.
Specifically, when certain power plant or thermal power plant need flexibility peak regulation, according to the heat source from power plant or thermal power plant
The temperature of medium (electricity, steam or hot water), the corresponding phase change material device for opening corresponding level, to carry out heat accumulation.
Further, the entrance of each phase change material device is both provided with temp.-control valve 31,32,33, and temp.-control valve is used for
It detects the temperature of heat source medium and is compared with the temperature of phase-change material and corresponding be turned on and off phase change material device.Its
In, the phase transition temperature of phase-change material is 50-180 DEG C in first order phase change heat-storing device 4, phase transformation material in second-order phase transistion heat-storing device 5
The phase transition temperature of material is 100-350 DEG C, and the phase transition temperature of phase-change material is 260-700 DEG C in three-level phase change material device 6, specifically
Situation needs to define series according to different, if the phase transition temperature of phase-change material is 100 DEG C in first order phase change heat-storing device, two level
The range of the phase transition temperature of phase-change material is then 100-350 DEG C in phase change material device, if phase transformation in first order phase change heat-storing device
The phase transition temperature of material is 150 DEG C, and the range of the phase transition temperature of phase-change material is then 150-350 in second-order phase transistion heat-storing device
℃。
Heat source medium enters phase-change thermal storage accordingly by the control of different temp.-control valves respectively by heat source medium entrance 1
In device, heat exchange is carried out by the phase-change material in phase change material device and realizes storage heat, exports and is discharged from heat source medium.It is cold
Source medium is entered in phase change material device by the control of valve 34,35,36 accordingly respectively by low-temperature receiver medium inlet 8, is inhaled
The heat in phase change material device is received, is discharged from low-temperature receiver media outlet.
When the temperature display of the temp.-control valve in the other phase change material device of previous stage is higher than the phase transition temperature of phase-change material
When, the other phase change material device of previous stage is closed by temp.-control valve, and open the other phase change material device of next stage and carry out phase
Become.Specifically, when the temperature display in the temp.-control valve of 4 input end of first order phase change heat-storing device has been slightly above this grade of phase transformation
In heat-storing device when the phase transition temperature of phase-change material, indicates wherein phase-change material complete phase transformation, then close first order phase change heat accumulation
Device 4 and the temp.-control valve for opening next stage phase change material device (second-order phase transistion heat-storing device 5), and so on.
Further, heat transfer coils 7 are both provided in each phase change material device, heat transfer coils 7 preferably use helical fin
Pipe and/or H-type finned tube.
Further, middle low-temperature phase-change material or high temperature phase change material (pcm) can be used in the phase-change material in phase change material device.Its
In, middle low-temperature phase-change material includes hydrate, organic matter and high molecular material, and high temperature phase change material (pcm) includes that fuse salt and metal close
Gold.
Further, the inlet of low-temperature receiver medium is provided with valve, by opening/shutting valve to control phase-change thermal storage dress accordingly
The storage heat set is supplied to low-temperature receiver medium.Specifically, the heat of the storage in the utility model in every grade of phase change material device
Amount will carry out heat supply to different low-temperature receiver media accordingly according to the different temperatures of storage respectively, wherein phase change material device produces
Raw 100 DEG C of storage heat heating of ＜ utilize；100-200 DEG C of storage heat providing warm air device, the flue gas that phase change material device generates
Reheater utilizes；200 DEG C of joint production process of ＞ that phase change material device generates convey utilization outside factory.
For example, the steam of 300 DEG C of highest is will produce when certain power plant's flexibility peak regulation, is equipped with the phase transformation there are three rank
The phase transition temperature of heat-storing device, phase-change material is respectively 180 DEG C, 260 DEG C, 300 DEG C.
If power plant produces as the heat source medium of 200 DEG C of steam, the level-one temp.-control valve inspection at first order phase change heat-storing device
The heat source medium for measuring 200 DEG C of steam is slightly above the phase transition temperature of first order phase change heat-storing device 4, then level-one temp.-control valve control is opened
First order phase change heat-storing device 4 is opened, and receives 200 DEG C of steam and carries out heat accumulation.
If 31 temperature display of level-one temp.-control valve at first order phase change heat-storing device 4 is more than 180 DEG C, level-one phase is closed
Become heat-storing device 4 and open the temp.-control valve 32 of second-order phase transistion heat-storing device 5, heat accumulation is carried out by second-order phase transistion heat-storing device 5.
If power plant is produced as the heat source medium of 280 DEG C of steam, the two level temp.-control valve 32 at second-order phase transistion heat-storing device 5 is examined
The heat source medium for measuring 280 DEG C of steam is slightly above the phase transition temperature of second-order phase transistion heat-storing device 5, then two level temp.-control valve 32 controls
It opens second-order phase transistion heat-storing device 5 and carries out heat accumulation.
If 32 temperature display of two level temp.-control valve at second-order phase transistion heat-storing device 5 is more than 260 DEG C, two level phase is closed
Become heat-storing device 5 and open the temp.-control valve 33 of three-level phase change material device 6, heat accumulation is carried out by three-level phase change material device 6.
The multi-level phase change heat-storing device of the utility model makes full use of the latent heat of phase-change material by latent heat of phase change principle
Heat accumulation, heat accumulation space is big, and occupation of land is minimum, can be changed according to different temperatures and carry out multistage heat accumulation respectively, with multilevel energy step
The effect utilized, the quality for substantially increasing heat accumulation efficiency and heat utilizes, while having simple system, easy to operate spy
Point；There is the waste heat of different qualities can when thermal power plant needs flexibility peak regulation when being transformed suitable for thermal power plant's flexibility peak regulation
It is carried out according to the corresponding phase change material device valve for opening respective stages of temperature of Power Plant Heat Source medium (electricity, steam or hot water)
Heat accumulation, the quality for improving heat utilizes, and is furnished with temp.-control valve, effectively avoids phase-change material overheat heat accumulation, heat resources
It is the case where waste, with good economic efficiency；The heat that respective stages can be needed to extract according to temperature respectively reaches step profit
Purpose.
The utility model is further described by specific embodiment above, it should be understood that, have here
The description of body, should not be construed as the restriction to the spirit and scope of the utility model, and one of ordinary skilled in the art is readding
The various modifications made to above-described embodiment after reader specification belong to the range that the utility model is protected.
Claims (8)
1. a kind of multi-level phase change heat-storing device, which is characterized in that be arranged between heat source medium and low-temperature receiver medium, include at least phase
Temperature gradually rises, the first order phase change heat-storing device of setting parallel with one another (4), second-order phase transistion heat-storing device (5) and three-level phase
Become heat-storing device (6), for receiving heat source, the phase-change material of different phase transition temperatures be both provided in each phase change material device,
Level-one, two level, three-level phase are opened accordingly according to the phase transition temperature of phase-change material in the temperature of heat source medium and heat-storing device
Become in heat-storing device one to carry out heat accumulation, and leads to low-temperature receiver medium to its heat supply.
2. multi-level phase change heat-storing device according to claim 1, which is characterized in that the entrance of each phase change material device
It is both provided with temp.-control valve, temp.-control valve is used to detect the temperature of heat source medium and is compared with phase with the temperature of phase-change material
That answers is turned on and off phase change material device.
3. multi-level phase change heat-storing device according to claim 1, which is characterized in that first order phase change heat-storing device (4) interior phase
Become the phase transition temperature of material as 50-180 DEG C.
4. multi-level phase change heat-storing device according to claim 1, which is characterized in that second-order phase transistion heat-storing device (5) interior phase
Become the phase transition temperature of material as 100-350 DEG C.
5. multi-level phase change heat-storing device according to claim 1, which is characterized in that three-level phase change material device (6) interior phase
Become the phase transition temperature of material as 260-700 DEG C.
6. multi-level phase change heat-storing device according to claim 1, which is characterized in that be respectively provided in each phase change material device
There are heat transfer coils (7), heat transfer coils (7) to use spiral fin coil and/or H-type finned tube.
7. multi-level phase change heat-storing device according to claim 1, which is characterized in that middle low temperature phase change can be used in phase-change material
Material, middle low-temperature phase-change material include hydrate, organic matter and high molecular material.
8. multi-level phase change heat-storing device according to claim 1, which is characterized in that high-temperature phase-change material can be used in phase-change material
Material, high temperature phase change material (pcm) includes fuse salt and metal alloy.
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| CN201820116662.9U CN207797837U (en) | 2018-01-23 | 2018-01-23 | Multi-level phase change heat-storing device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405611A (en) * | 2018-09-14 | 2019-03-01 | 中国科学院电工研究所 | Compound heat reservoir with two-stage phase change material device and steam storage tank |
| CN109780908A (en) * | 2019-01-09 | 2019-05-21 | 青岛海尔空调器有限总公司 | A kind of control method of energy source station |
| CN110296452A (en) * | 2019-08-02 | 2019-10-01 | 河南理工大学 | A kind of multi-level phase change heat storage type solar heating, hot-water supply system |
| CN111140899A (en) * | 2020-01-20 | 2020-05-12 | 天津大学 | Air source heat pump heating system capable of realizing cascade heat storage, heat supply and defrosting |
| CN111238281A (en) * | 2020-01-20 | 2020-06-05 | 天津大学 | Adjustable step phase change heat storage device and control method |
| CN111637776A (en) * | 2020-06-12 | 2020-09-08 | 东北大学 | Multi-level phase change recycling and storing device for waste heat of metallurgical high-temperature slag |
| CN112414192A (en) * | 2020-11-27 | 2021-02-26 | 上海交通大学 | Variable heat source step phase change energy storage regulation and control device |
| CN112944967A (en) * | 2021-01-25 | 2021-06-11 | 杭州德尚科技有限公司 | PVT heat storage and utilization device and control method thereof |
| CN113028644A (en) * | 2021-03-05 | 2021-06-25 | 华北水利水电大学 | Multi-stage phase-change heat storage temperature layering water tank |
| CN113218227A (en) * | 2021-05-08 | 2021-08-06 | 中煤科工集团重庆研究院有限公司 | Gas heat storage oxidation multi-medium step efficient heat storage peak regulation system |
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2018
- 2018-01-23 CN CN201820116662.9U patent/CN207797837U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405611A (en) * | 2018-09-14 | 2019-03-01 | 中国科学院电工研究所 | Compound heat reservoir with two-stage phase change material device and steam storage tank |
| CN109405611B (en) * | 2018-09-14 | 2020-04-28 | 中国科学院电工研究所 | Composite heat storage system with two-stage phase change heat storage device and steam storage tank |
| CN109780908A (en) * | 2019-01-09 | 2019-05-21 | 青岛海尔空调器有限总公司 | A kind of control method of energy source station |
| CN110296452A (en) * | 2019-08-02 | 2019-10-01 | 河南理工大学 | A kind of multi-level phase change heat storage type solar heating, hot-water supply system |
| CN111140899A (en) * | 2020-01-20 | 2020-05-12 | 天津大学 | Air source heat pump heating system capable of realizing cascade heat storage, heat supply and defrosting |
| CN111238281A (en) * | 2020-01-20 | 2020-06-05 | 天津大学 | Adjustable step phase change heat storage device and control method |
| CN111637776A (en) * | 2020-06-12 | 2020-09-08 | 东北大学 | Multi-level phase change recycling and storing device for waste heat of metallurgical high-temperature slag |
| CN112414192A (en) * | 2020-11-27 | 2021-02-26 | 上海交通大学 | Variable heat source step phase change energy storage regulation and control device |
| CN112944967A (en) * | 2021-01-25 | 2021-06-11 | 杭州德尚科技有限公司 | PVT heat storage and utilization device and control method thereof |
| CN113028644A (en) * | 2021-03-05 | 2021-06-25 | 华北水利水电大学 | Multi-stage phase-change heat storage temperature layering water tank |
| CN113218227A (en) * | 2021-05-08 | 2021-08-06 | 中煤科工集团重庆研究院有限公司 | Gas heat storage oxidation multi-medium step efficient heat storage peak regulation system |
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