CN205860600U - A kind of low-temperature cold accumulation system - Google Patents
A kind of low-temperature cold accumulation system Download PDFInfo
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- CN205860600U CN205860600U CN201620864653.9U CN201620864653U CN205860600U CN 205860600 U CN205860600 U CN 205860600U CN 201620864653 U CN201620864653 U CN 201620864653U CN 205860600 U CN205860600 U CN 205860600U
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- heat exchanger
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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
This utility model relates to low temperature liquid air energy storage field, particularly relates to a kind of low-temperature cold accumulation system, and it includes releasing cold heat exchanger, storage cold heat exchanger, fluid working substance memorizer and solid-phase media regenerator；Solid-phase media regenerator accommodates the solid-phase media for cold-storage, fluid working substance memorizer accommodates the fluid working substance for heat exchange；Fluid working substance memorizer, solid-phase media regenerator and release cold heat exchanger and be sequentially connected with by pipeline, formed and release SAPMAC method passage；Solid-phase media regenerator, fluid working substance memorizer and storage cold heat exchanger are sequentially connected with by pipeline, form storage SAPMAC method passage.This utility model uses solid-phase media to carry out cold-storage, and uses fluid working substance as heat transferring medium, it is to avoid air and the big temperature difference problem of cool storage medium direct heat transfer starting stage, improves cold-storage efficiency, reduces system cost.
Description
Technical field
This utility model relates to energy storage technology field, particularly relates to a kind of low-temperature cold accumulation system.
Background technology
The energy storage technology of development and application mainly has flywheel energy storage, battery energy storage, superconducting energy storage, ultracapacitor to store up at present
Energy, water-storage and compressed-air energy storage etc..Wherein can last for hours the energy storage carrying out Large Copacity output at lower cost
Technology specifically includes that water-storage, battery energy storage and compressed-air energy storage, and they are that a few is capable of for a long time (number
Ten hours) and the technology of Large Copacity (hundreds of to thousands of megawatt hours) stored energy application, other several energy storage technologies are more suitable for providing
The energy storage service of short time improves the quality of power supply and improves network system stability.Water-storage is as presently most maturation
The advantages such as extensive energy storage technology, has efficiency high, and stored energy capacitance is big, and equipment and technology is ripe, but simultaneously by cistern addressing
Difficult restriction, hinders its popularization and application at wide geographic area.Battery energy storage has a extensive future in small-scale distributing is applied,
Scientific research aspect also has a lot of new technique in development, but owing to its overall life cycle cost is high, produces and subsequent treatment exists ring
The problems such as environment pollution, still suffer from restriction at present in large-scale use.Compressed-air energy storage carries out energy with air internal energy form
Store, it is possible to use polytype storing mode, including Underground Salt hole and high pressure gas storage tank etc..But due to compressed air
Energy storage typically requires big volume memory space, and this directly limit the further development of compressed-air energy storage.
In order to solve the problem of compressed air energy storage technology gas storage space, recent domestic scholar has carried out low temperature in succession
The research of liquid air energy storage technology, low temperature liquid air energy storage uses normal pressure liquid air as energy-accumulating medium, can will store up
Energy density is from the 2-10kWh/m of conventional compressed air energy storage3Bring up to 30-100kWh/m3.The program has unit volume capacity
Greatly, limit without geographical conditions, the method for operation advantage such as flexibly, there are the potentiality of large-scale promotion application.
During low temperature liquid air energy storage systems energy storage, use valley electricity to drive compressor to be compressed by air, utilize last
Cycle releases the cold that can store during rewarming and will enter in low-temperature storage tank after air cooling liquid and store；When system releases energy, profit
With cryopump, liquid air is drawn pressurization from low-temperature storage tank, utilize low-temperature cold accumulation system to reclaim low temperature cold, make air inhale
Hot rewarming promotes turbine expansion acting to drive electrical power generators after heating up, and the cold reclaimed during rewarming is for next cycle
During energy storage liquefaction, air is carried out cooling liquid.
Low temperature liquid air energy storage systems mainly uses solid-phase media directly and the mode of air heat-exchange carries out cold-storage at present,
And use liquid refrigerant cold-storage.Wherein use solid-phase media directly and the mode of air heat-exchange cold-storage, at the beginning of cold-storage/release is cold
In stage beginning, air is the biggest with the temperature difference of solid-phase media, causes cold-storage inefficient；And use the mode of liquid working substance cold-storage to deposit
Storage volume is big, and cost is high.
Utility model content
(1) to solve the technical problem that
This utility model provides a kind of low-temperature cold accumulation system for low temperature liquid air energy storage systems, uses fluid working substance
Heat exchange, solid-phase media cold-storage, be used for solving to use conventional solid medium cold accumulation system cold-storage efficiency low, and use liquid working substance to store
The problem that cold high cost, storage volume are excessive.
(2) technical scheme
In order to solve above-mentioned technical problem, this utility model provides a kind of low-temperature cold accumulation system, it is characterised in that include releasing
Cold heat exchanger, storage cold heat exchanger, fluid working substance memorizer and solid-phase media regenerator；Described solid-phase media regenerator accommodates
There is the solid-phase media for cold-storage, described fluid working substance memorizer accommodates the fluid working substance for heat exchange；Described fluid work
Matter memorizer, described solid-phase media regenerator and described cold heat exchanger of releasing are sequentially connected with by pipeline, are formed and release SAPMAC method passage；
Described solid-phase media regenerator, described fluid working substance memorizer and described storage cold heat exchanger are sequentially connected with by pipeline, form storage
SAPMAC method passage.
Wherein, described in release SAPMAC method passage and storage SAPMAC method passage in all accommodate the described fluid working substance circulated,
Described release SAPMAC method passage and storage SAPMAC method passage is equipped with the regulation valve of regulated fluid working medium flow.
Wherein, gas-liquid separator is also included and for storing the Low Temperature Liquid of the liquid air that described gas-liquid separator separates goes out
State air reservoir；Release cold heat exchanger and connect one end of gas-liquid separator, so that the height that cold heat exchanger carries out cooling down will be released described in process
Pressure air introduces described gas-liquid separator；The other end of gas-liquid separator is divided into two outlets, described in one of them outlet
Low temperature liquid air reservoir, another outlet releases cold heat exchanger, empty for the gaseous state described gas-liquid separator separates gone out
Gas with the direction contrary with pressure-air pass through described in release cold heat exchanger.
Wherein, release cold heat exchanger described in and connect described the one of described gas-liquid separator by choke valve or liquid expander
End；Described low temperature liquid air reservoir is by cryopump connection storage cold heat exchanger, and described cryopump is for by described low temperature liquid
Liquid air in air reservoir extracts pressurization out.
Wherein, described solid-phase media is to pile up the porous media that heat conduction solid phase particles is formed.
Wherein, the porosity of described porous media is 10%～90%.
Wherein, the use warm area of described fluid working substance is-196 DEG C～50 DEG C；
Wherein, the pressure limit of described fluid working substance is 0.1MPa～10MPa (absolute pressure).
Wherein, one or more during described fluid working substance is gaseous state, liquid, supercriticality.
(3) beneficial effect
The low-temperature cold accumulation system that this utility model provides, using fluid working substance as heat transferring medium, releases cold/storage cold junction bundle every time
After, the temperature of fluid working substance is always close with solid phase cool storage medium temperature, wait until store up next time cold/release cold at first, stream
Body working medium can be smaller with cool storage medium heat transfer temperature difference, it is to avoid the big temperature difference of air and cool storage medium direct heat transfer starting stage
Problem, improves cold-storage efficiency；Relative to liquid pre-cooling working medium cold accumulation system, this utility model uses solid-phase media to store
Cold, and fluid working substance is intended only as heat transferring medium, greatly reduces the consumption of system fluid working medium, reduces system cost；This
In utility model, its density of solid-phase media is the biggest, and uses the cold accumulation system of solid-phase media cold-storage to need only to
One single regenerator, and do not differentiate between cold conditions and hot, take memory space smaller.
Accompanying drawing explanation
The composition signal of the low-temperature cold accumulation system of the fluid working substance heat exchange solid-phase media cold-storage that Fig. 1 provides for this utility model
Figure；
In figure, 1: release cold heat exchanger；2: storage cold heat exchanger；3: fluid working substance memorizer；4: solid-phase media regenerator；5: pipe
Road；6: regulation valve.
Detailed description of the invention
For the ease of understanding this utility model, below with reference to relevant drawings, this utility model is more fully retouched
State.Accompanying drawing gives better embodiment of the present utility model.These are only preferred embodiment of the present utility model, and unprovoked
This limits the scope of the claims of the present utility model, every equivalent structure utilizing this utility model description and accompanying drawing content to be made or
Equivalence flow process conversion, or be directly or indirectly used in other relevant technical fields, be the most in like manner included in of the present utility model specially
In profit protection domain.
Unless otherwise defined, all of technology used herein and scientific terminology are led with belonging to technology of the present utility model
The implication that the technical staff in territory is generally understood that is identical.At term used in the description of the present utility model it is simply herein
The purpose of specific embodiment is described, it is not intended that in limiting this utility model.Term as used herein " and/or " bag
Include the arbitrary and all of combination of one or more relevant Listed Items.
This utility model provides a kind of fluid working substance heat exchange solid-phase media cold-storage for low temperature liquid air energy storage systems
Low-temperature cold accumulation system, be used for solving using conventional solid medium cold accumulation system cold-storage efficiency low, and use liquid working substance cold-storage
The problem that high cost, storage volume are excessive.
As it is shown in figure 1, provide a kind of low-temperature cold accumulation system in this utility model embodiment, it uses fluid working substance and changes
Heat, solid-phase media cold-storage, for low temperature liquid air energy storage systems.It includes releasing cold heat exchanger 1, storage cold heat exchanger 2, fluid work
Matter memorizer 3 and solid-phase media regenerator 4；Solid-phase media regenerator 4 accommodates the solid-phase media for cold-storage, fluid work
Matter memorizer 3 accommodates the fluid working substance for heat exchange；Fluid working substance memorizer 3, solid-phase media regenerator 4 and release cold heat exchange
Device 1 is sequentially connected with by pipeline 5, is formed and releases SAPMAC method passage；Solid-phase media regenerator 4, fluid working substance memorizer 3 and Chu Lenghuan
Hot device 2 is sequentially connected with by pipeline 5, forms storage SAPMAC method passage.
In this utility model embodiment, fluid working substance circulates in releasing SAPMAC method passage and storage SAPMAC method passage, releases
SAPMAC method passage and storage SAPMAC method passage are equipped with the regulation valve of regulated fluid working medium flow, and regulation valve can be arranged on releases cold following
Ring passage and the optional position of storage SAPMAC method passage, for the flow of regulated fluid working medium, to ensure that fluid working substance is situated between with solid phase
Matter and releasing cold heat exchanger 1 and storage cold heat exchanger 2 heat exchange efficiency；More specifically, solid-phase media regenerator 4 with release cold changing
Regulation valve 6 it is equipped with between hot device 1 and between fluid working substance memorizer 3 and storage cold heat exchanger 2.
In this utility model embodiment, low-temperature cold accumulation system also include gas-liquid separator and low temperature liquid air reservoir and
Choke valve or liquid expander (not shown), pressure-air cools by releasing cold heat exchanger 1, and through throttling
Valve throttling or liquid expander enter described gas-liquid separator after expanding.Liquid in gas-liquid separator enters low temperature liquid air
Storage tank stores, and meanwhile, the gas not liquefied in gas-liquid separator is cold by releasing with the direction reflux contrary with pressure-air
Heat exchanger 1, forms reflux air.It is apparent that the air not liquefied can be cold to pressure-air row when by releasing cold heat exchanger 1
But lower the temperature, and then the heat exchange rate of temperature fall of pressure-air can be effectively improved.It addition, the liquid in low temperature liquid air reservoir
Air is extracted out pressurization by cryopump (not shown) and forms expanded air by storage cold heat exchanger 2 heat exchange intensification.
In this utility model embodiment, solid-phase media is to pile up the porous media that heat conduction solid phase particles is formed, and adds
The heat exchange area of system, enhances the diabatic process between fluid working substance and solid phase cool storage medium, improves fluid working substance and solid phase
The heat exchange efficiency of medium.
In this utility model embodiment, the porosity of porous media is 10%～90%.
In this utility model embodiment, the use warm area of fluid working substance is-196 DEG C～50 DEG C.
In this utility model embodiment, the working pressure range of fluid working substance is 0.1MPa～10MPa, and this operating pressure is
Absolute pressure.
In this utility model embodiment, fluid working substance is one or more in gaseous state, liquid, supercriticality.
As it is shown in figure 1, the duty of described low-temperature cold accumulation system include release cold process and Chu Leng process, wherein work
Principle is as follows:
Releasing cold process: before startup, solid-phase media is in cold conditions, the low-temperature cold accumulation system of fluid working substance heat exchange solid-phase media cold-storage
Unite its cold can form store in solid phase cool storage medium.Release cold during, fluid working substance flows from fluid working substance memorizer 3
Going out, first flow through solid-phase media regenerator 4, be cooled to low temperature state by solid-phase media, then the fluid working substance of low temperature state leads to
Cross and release cold heat exchanger 1 and carry out countercurrent flow with pressure-air, be heated to form the condition of high temperature, then incoming fluid working medium memorizer 3, complete
Become to release cold process recuperated cycle.Pressure-air experiences the process that cools described above, and the high pressure low temperature air obtained enters joint
Stream valve throttling or liquid expander expand liquefaction and enter gas-liquid separator, and in gas-liquid separator, Cryogenic air inversely flows through and releases cold changing
Hot device, reversely cools down pressure-air, forms reflux air, carries out cold recovery.In gas-liquid separator, liquid air enters low temperature
In liquid air storage tank, and it is stored in fluid reservoir with liquid air, completes to release cold process.Whole releasing cold process, cold is complete
Become the transfer process from solid phase cool storage medium-liquid air, and by throttling or expansion temperature-fall period and the cold of reflux gas
It is recovered as pressure-air and supplements cold, completion system cold balancing, it is to avoid extraneous cold input.
Store up cold process: releasing cold junction bundle to storing up during before cold beginning, solid-phase media is in hot.During storage is cold,
It is stored in the liquid air in low temperature liquid air reservoir, first passes around cryopump pressurization, change through storage cold heat exchanger 2 the most again
Hot rewarming.Concrete heat transfer process is, fluid working substance first flows through storage cold heat exchanger 2, carries out countercurrent flow with air, at Chu Lenghuan
The outlet of hot device is cooled to low temperature state, and the fluid working substance of low temperature state passes through solid-phase media regenerator 4, enters solid-phase media
Row cooling, the fluid working substance flowed out from solid-phase media regenerator 4 again returns in fluid working substance memorizer 3, completes Chu Lenghuan
Thermal cycle.Experience heat transfer process rewarming as above from cryopump low temperature liquid air out and form expanded air, simultaneously
Complete the cold transfer process from low temperature liquid sky vapor solid heat storage medium.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Within the spirit of utility model and principle, any modification, equivalent substitution and improvement etc. made, should be included in this utility model
Protection domain within.
Claims (9)
1. a low-temperature cold accumulation system, it is characterised in that include releasing cold heat exchanger (1), storage cold heat exchanger (2), fluid working substance are deposited
Reservoir (3) and solid-phase media regenerator (4)；Described solid-phase media regenerator (4) accommodates the solid-phase media for cold-storage,
Described fluid working substance memorizer (3) accommodates the fluid working substance for heat exchange；Described fluid working substance memorizer (3), described solid
Phase medium regenerator (4) and described cold heat exchanger (1) of releasing are sequentially connected with by pipeline (5), are formed and release SAPMAC method passage；Described solid
Phase medium regenerator (4), described fluid working substance memorizer (3) and described storage cold heat exchanger (2) are sequentially connected with by pipeline (5),
Form storage SAPMAC method passage.
Low-temperature cold accumulation system the most according to claim 1, it is characterised in that described in release SAPMAC method passage and storage SAPMAC method lead to
Road all accommodates the described fluid working substance circulated, described in release SAPMAC method passage and storage SAPMAC method passage be equipped with regulation stream
The regulation valve (6) of body working medium flow.
Low-temperature cold accumulation system the most according to claim 1, it is characterised in that also include gas-liquid separator and for storing
State the low temperature liquid air reservoir of the liquid air that gas-liquid separator separates goes out；Release cold heat exchanger (1) and connect gas-liquid separator
One end, releases, described in passing through, the pressure-air described gas-liquid separator of introducing that cold heat exchanger (1) carries out cooling down；Gas-liquid separator
The other end be divided into two outlets, low temperature liquid air reservoir described in one of them outlet, another outlet is released cold
Heat exchanger (1), passes through described for the gaseous air described gas-liquid separator separates gone out with the direction contrary with pressure-air
Release cold heat exchanger (1).
Low-temperature cold accumulation system the most according to claim 3, it is characterised in that described in release cold heat exchanger (1) and pass through choke valve
Or liquid expander connects described one end of described gas-liquid separator；Described low temperature liquid air reservoir is by cryopump connection storage
Cold heat exchanger (2), described cryopump is for extracting the liquid air in described low temperature liquid air reservoir out pressurization.
Low-temperature cold accumulation system the most according to claim 1, it is characterised in that described solid-phase media is for piling up heat conduction solid phase
Grain and the porous media that formed.
Low-temperature cold accumulation system the most according to claim 5, it is characterised in that the porosity of described porous media be 10%～
90%.
7. according to the low-temperature cold accumulation system according to any one of claim 1-6, it is characterised in that the use of described fluid working substance
Warm area is-196 DEG C～50 DEG C.
Low-temperature cold accumulation system the most according to claim 7, it is characterised in that the pressure limit of described fluid working substance is
0.1MPa (A)～10MPa (A).
Low-temperature cold accumulation system the most according to claim 8, it is characterised in that described fluid working substance is gaseous state, liquid, surpasses and face
One or more in boundary's state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620864653.9U CN205860600U (en) | 2016-08-10 | 2016-08-10 | A kind of low-temperature cold accumulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620864653.9U CN205860600U (en) | 2016-08-10 | 2016-08-10 | A kind of low-temperature cold accumulation system |
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| CN205860600U true CN205860600U (en) | 2017-01-04 |
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| CN201620864653.9U Withdrawn - After Issue CN205860600U (en) | 2016-08-10 | 2016-08-10 | A kind of low-temperature cold accumulation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123423A (en) * | 2016-08-10 | 2016-11-16 | 中国科学院理化技术研究所 | A kind of low-temperature cold accumulation system and method |
| CN112219930A (en) * | 2020-09-29 | 2021-01-15 | 山东大学 | Heat exchange structure and ice cream preparation system based on cold flash memory |
-
2016
- 2016-08-10 CN CN201620864653.9U patent/CN205860600U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123423A (en) * | 2016-08-10 | 2016-11-16 | 中国科学院理化技术研究所 | A kind of low-temperature cold accumulation system and method |
| CN106123423B (en) * | 2016-08-10 | 2019-03-08 | 中国科学院理化技术研究所 | A kind of low-temperature cold accumulation system and method |
| CN112219930A (en) * | 2020-09-29 | 2021-01-15 | 山东大学 | Heat exchange structure and ice cream preparation system based on cold flash memory |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170104 Effective date of abandoning: 20190308 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170104 Effective date of abandoning: 20190308 |