CN102494380A - Hydrate cold accumulation system with refrigeration function - Google Patents
Hydrate cold accumulation system with refrigeration function Download PDFInfo
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- CN102494380A CN102494380A CN2011104152743A CN201110415274A CN102494380A CN 102494380 A CN102494380 A CN 102494380A CN 2011104152743 A CN2011104152743 A CN 2011104152743A CN 201110415274 A CN201110415274 A CN 201110415274A CN 102494380 A CN102494380 A CN 102494380A
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- hydrate
- cold accumulation
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- accumulation system
- hydrate cold
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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 invention relates to a hydrate cold accumulation system with a refrigeration function, which comprises a hydrate cold accumulation tank, a heat exchanger, a low-pressure air storage tank, an evaporator, a depressurizing device, a high-pressure air storage tank, a pressure control valve, a first one-way valve and a second one-way valve; the hydrate cold accumulation tank is of a pressure sealed container filled with water; the hydrate cold accumulation tank is connected to the high-pressure air storage tank through the first one-way valve and connected to the low-pressure air storage tank through the second one-way valve; the heat exchanger is arranged around the hydrate cold accumulation tank; the low-pressure air storage tank is connected to the evaporator; and the evaporator is connected to the high-pressure air storage tank through the depressurizing device and the pressure control valve in turn. Latent heat of hydrate and high-pressure gas decomposed by the hydrate can be sufficiently utilized; therefore, the hydrate cold accumulation system has the advantages of being efficient and energy-saving and is particularly applied to a cold accumulation system with natural refrigeration working mediums, such as carbon dioxide, hydrocarbon and the like; the hydrate cold accumulation system is not only capable of providing air-conditioning refrigeration but also capable of providing freezing and refrigerating refrigeration; and the refrigeration temperature can be determined as demands.
Description
Technical field
The present invention relates to the cold-storage energy conserving system, be specifically related to a kind ofly, belong to the heat energy technical field with the hydrate cold accumulation system with refrigerating function of gas hydrate as medium.
Background technology
Along with China's electricity supply and demand contradiction is outstanding gradually, show the application day of energy storage technology in central air conditioner system urgent.Usually the cold-storage refrigerant that adopts (refrigerant is in the refrigerating and air conditioning system, in order to the working fluid of transferring heat energy, generation refrigerating effect) has: water, ice, eutectic salts and gas hydrate.Said gas hydrate is a kind of envelope shape crystal, be crystal network that external gas molecule is formed by hydrone protect massively be trapped among in the middle of and form.Most of cold-producing mediums can form gas hydrate under 5～12 ℃ of conditions.Gas hydrate is as cool storage medium of new generation, and combination property is best: generate heat and be about 302.4～464kJ/kg, its storage density of cold 334kJ/kg with ice is suitable; Decomposition temperature is 5～12 ℃, is complementary with the operating condition of air-conditioning unit, need not to change the operating condition of former air conditioner cold water unit during the cold accumulation system operation.
At present putting of hydrate cold accumulation system absorbs latent heat of phase change when cold circulation normally utilizes decomposition of hydrate and freezes.Put cooling system and comprise direct contact and mediate contact heat transfer type, cold wind directly is blown into low temperature space through fan coil.Put the latent heat of vaporization of cold circulation when only having utilized hydrate phase change in the existing hydrate cold accumulation system, therefore, this puts the operating condition that cooling system is only applicable to air-conditioning.
Gas and water can form gas hydrate under the condition of lower temperature and elevated pressures, in one cubic metre water, can receive the gas of about 200 times of normal volumes.When the temperature of hydrate rises to when balancing each other temperature above it, gas hydrate will decompose and discharge gas, if place airtight container to this hydrate this moment, then the pressure in the container can raise along with the release of gas gradually.Because the phase equilibrium line of the hydrate of most of gas is having a turning point more than 0 ℃, so the pressure that balances each other of hydrate can sharp increase when temperature is higher than this turning point.Therefore; Below the turning point temperature, facilitate hydrate synthetic with lower pressure; Being higher than this turning point temperature decomposition and the release gas in season, then can obtain higher gas pressure then, especially hydrate phase balance pressure is infinitely great when the normal temperature state; Hydrate almost can't exist, thereby can obtain high high pressure.
Summary of the invention
Technical problem to be solved by this invention is; Overcome the deficiency of existing cold accumulation system; A kind of novel hydrate cold accumulation system with refrigerating function is provided; It can discharge the principle of the gas that is received when utilizing gas hydrate to decompose, take to limit the measure of gas volume and obtain gases at high pressure, and come to obtain once more cold through the throttling of gases at high pressure.
The technical scheme that the present invention solves its technical problem is:
A kind of hydrate cold accumulation system with refrigerating function; It comprises hydrate cold-storage groove, heat exchanger, low pressure gasholder, evaporimeter, dropping equipment, high pressure tank, pressure-control valve, first check valve and second check valve; Said hydrate cold-storage groove is that a pressure sealing container and inside are filled with water; This hydrate cold-storage groove connects said high pressure tank through said first check valve, connects said low pressure gasholder through said second check valve, and said heat exchanger is arranged at around this hydrate cold-storage groove; This low pressure gasholder connects said evaporimeter, and this evaporimeter is connected said high pressure tank through said dropping equipment successively with pressure-control valve.
Hydrate cold accumulation system with refrigerating function of the present invention; Its low pressure gasholder inside is provided with its inner chamber is separated into two-part dividing plate up and down; This dividing plate can keep flatly moving up and down along this low pressure gasholder inner chamber; The part of this dividing plate below is a back pressure cavity, is provided with in this back pressure cavity and can drives the spring that dividing plate moves; Said heat exchanger is an indirect touch high-performance heat exchanger; Said dropping equipment is choke valve or expansion valve; Said high pressure tank is the high pressure fluid reservoir; Said connection is pipeline and connects.
The present invention proposes a kind of new hydrate cold accumulation system with refrigerating function; The gases at high pressure that form when it utilizes decomposition of hydrate; Realize refrigeration once more through throttling, liquefaction, evaporation; Thereby not only reclaimed the latent heat of phase change of hydrate, also reclaimed a part of merit of gases at high pressure, so whole system has reached higher, the more energy-conservation beneficial effect of efficient.In addition, the present invention be advantageous in that so said refrigeration system can not only provide air conditioner refrigerating, freezing, refrigeration can also be provided, cryogenic temperature can be confirmed as required owing to the refrigeration coefficient of heat transfer through evaporimeter is big.
In a word, the present invention has made full use of hydrate and the latent heat of the gases at high pressure that are decomposed to form, has efficient, energy-saving advantages, is particularly useful for the cold accumulation system of natural refrigeration working mediums such as carbon dioxide, hydro carbons.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Combine specific embodiment and accompanying drawing that the present invention is described further at present.
See also Fig. 1 sketch map of the present invention.The hydrate cold accumulation system that diagram has refrigerating function comprises hydrate cold-storage groove 1, heat exchanger 2, low pressure gasholder 3, evaporimeter 4, dropping equipment 5, high pressure tank 6, pressure-control valve 7, first check valve 8 and second check valve 9.Said hydrate cold-storage groove 1 is a pressure sealing container; Inside is filled with water; Its top is respectively equipped with low-pressure gas import and gases at high pressure exhaust outlet; This gases at high pressure exhaust outlet connects said high pressure tank 6 through said first check valve 8, and this low-pressure gas import connects said low pressure gasholder 3 through said second check valve 9.Said heat exchanger 2 is arranged at around this hydrate cold-storage groove 1, and it can be indirect touch high-performance heat exchanger or other any type of high-performance heat exchanger; Feeding comes the cold carrier of autonomous refrigeration system to this heat exchanger 2 in the cold-storage stage, putting the thermophore of cold stage feeding from heat space, hydrate cold-storage groove 1 is heated or lower the temperature.Said low pressure gasholder 3 is used to store low pressure refrigerant gas, and it also is connected with said evaporimeter 4; The inside of said low pressure gasholder 3 is provided with the dividing plate 3-1 of level; This dividing plate 3-1 is separated into two parts up and down with the inner chamber of low pressure gasholder 3; The part of its below is back pressure cavity 3-2; This dividing plate 3-1 can keep along the inner chamber of this low pressure gasholder 3 flatly moving up and down, and is provided with spring 3-3 among the said back pressure cavity 3-2, and this spring 3-3 can drive this dividing plate 3-1 and move up and down.Said evaporimeter 4 is used for refrigerant liquid sweat cooling within it, and it connects 7 through said dropping equipment 5 with pressure-control valve successively and connects said high pressure tank 6.Said dropping equipment 5 can be a choke valve, also can be expansion valve.Said high pressure tank 6 is used to store higher pressure refrigerant gas, and it also can be a fluid reservoir.Said pressure-control valve 7 can be controlled pressure in the high pressure tank 6 to keep balance through reconciling flow.Connection between above-mentioned each member is pipeline and connects.
The groundwork process of the hydrate cold accumulation system with refrigerating function according to the invention is following: at first in this system, charge into low pressure refrigerant gas, and with system lock.In the cold-storage stage, feed cold carrier in the heat exchanger 2, make 1 cooling of hydrate cold-storage groove, hydrate begins to form.Formation along with hydrate; Gas is absorbed by hydrate; Gas pressure in the hydrate cold-storage groove 1 decreases; Second check valve 9 is opened, low pressure gasholder 3 beginning air feed, and control the moving to keep pressure stability in low pressure gasholder 3 of dividing plate 3-1 by the spring 3-3 among the back pressure cavity 3-2 this moment.In this stage, the pressure-control valve 7 and first check valve 8 all are in closed condition.
Putting the cold stage, feeding heat carrier in the heat exchanger 2, hydrate cold-storage groove 1 is heated up; Hydrate begins to decompose, and the gas that discharges makes the pressure in the hydrate cold-storage groove 1 begin to rise, and first check valve 8 is opened; Gas gets into high pressure tank 6 and gathers, and along with the continuous decomposition of hydrate, the pressure in the high pressure tank 6 constantly raises; When reaching predetermined pressure, pressure-control valve 7 is opened, and gas or liquid get into step-down in the dropping equipment 5, cooling; Control pressure balance in high pressure tank 6 through the flow of reconciling pressure-control valve 7 this moment; Behind the sweat cooling, get back in the low pressure gasholder 3 in the refrigerant liquid entering evaporimeter 4; The pressure that keeps in the low pressure gasholder 3 that moves through the control of the spring 3-3 among back pressure cavity 3-2 dividing plate 3-1 is lower than evaporating pressure slightly.
The present invention is not limited in above-mentioned embodiment, and within the scope of the invention, any non-substantial variations, remodeling, interpolation or the replacement made all should belong to protection scope of the present invention.
Claims (6)
1. hydrate cold accumulation system with refrigerating function; It is characterized in that: said cold accumulation system comprises hydrate cold-storage groove, heat exchanger, low pressure gasholder, evaporimeter, dropping equipment, high pressure tank, pressure-control valve, first check valve and second check valve; Said hydrate cold-storage groove is that a pressure sealing container and inside are filled with water; This hydrate cold-storage groove connects said high pressure tank through said first check valve; Connect said low pressure gasholder through said second check valve; Said heat exchanger is arranged at around this hydrate cold-storage groove, and this low pressure gasholder connects said evaporimeter, and this evaporimeter is connected said high pressure tank through said dropping equipment successively with pressure-control valve.
2. the hydrate cold accumulation system with refrigerating function according to claim 1; It is characterized in that: said low pressure gasholder inside is provided with its inner chamber is separated into two-part dividing plate up and down; This dividing plate can keep flatly moving up and down along this low pressure gasholder inner chamber; The part of this dividing plate below is a back pressure cavity, is provided with in this back pressure cavity and can drives the spring that dividing plate moves.
3. the hydrate cold accumulation system with refrigerating function according to claim 2 is characterized in that: said heat exchanger is an indirect touch high-performance heat exchanger.
4. the hydrate cold accumulation system with refrigerating function according to claim 2 is characterized in that: said dropping equipment is choke valve or expansion valve.
5. the hydrate cold accumulation system with refrigerating function according to claim 2 is characterized in that: said high pressure tank is the high pressure fluid reservoir.
6. the hydrate cold accumulation system with refrigerating function according to claim 1 is characterized in that: said connection is pipeline and connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110415274.3A CN102494380B (en) | 2011-12-13 | 2011-12-13 | Hydrate cold accumulation system with refrigeration function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110415274.3A CN102494380B (en) | 2011-12-13 | 2011-12-13 | Hydrate cold accumulation system with refrigeration function |
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| CN102494380A true CN102494380A (en) | 2012-06-13 |
| CN102494380B CN102494380B (en) | 2014-08-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470472A (en) * | 2013-09-23 | 2013-12-25 | 上海理工大学 | Hydrate pressurization and circulation system |
| CN108120041A (en) * | 2017-12-21 | 2018-06-05 | 郑州轻工业学院 | Hydrate cold-storage device based on refrigerant boiling-condensation cycle process |
| CN110748990A (en) * | 2019-10-11 | 2020-02-04 | 深圳市玖品空气净化科技有限公司 | Anion air purifier capable of removing ozone |
| CN114152013A (en) * | 2021-11-09 | 2022-03-08 | 大连理工大学 | Movable type hydrate phase change microcapsule cold accumulation system |
| CN114484646A (en) * | 2022-02-11 | 2022-05-13 | 中南大学 | Refrigeration and cold accumulation system using hydrate slurry as working medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH01291028A (en) * | 1988-05-16 | 1989-11-22 | Mitsubishi Electric Corp | Air-cooled heat pump type air conditioner |
| CN2727613Y (en) * | 2004-04-23 | 2005-09-21 | 陈尊山 | Integrative air conditioner using antifreezing fluid for cold storage and low pressure cyclic cold delivery |
| CN101476759A (en) * | 2008-12-29 | 2009-07-08 | 中国包装和食品机械总公司 | Refrigerating device and its relative moisture control method during refrigeration |
| CN202361724U (en) * | 2011-12-13 | 2012-08-01 | 上海理工大学 | Efficient and energy-saving cold storage device |
-
2011
- 2011-12-13 CN CN201110415274.3A patent/CN102494380B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01291028A (en) * | 1988-05-16 | 1989-11-22 | Mitsubishi Electric Corp | Air-cooled heat pump type air conditioner |
| CN2727613Y (en) * | 2004-04-23 | 2005-09-21 | 陈尊山 | Integrative air conditioner using antifreezing fluid for cold storage and low pressure cyclic cold delivery |
| CN101476759A (en) * | 2008-12-29 | 2009-07-08 | 中国包装和食品机械总公司 | Refrigerating device and its relative moisture control method during refrigeration |
| CN202361724U (en) * | 2011-12-13 | 2012-08-01 | 上海理工大学 | Efficient and energy-saving cold storage device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470472A (en) * | 2013-09-23 | 2013-12-25 | 上海理工大学 | Hydrate pressurization and circulation system |
| CN103470472B (en) * | 2013-09-23 | 2016-01-20 | 上海理工大学 | A kind of hydrate pressurization and the circulatory system |
| CN108120041A (en) * | 2017-12-21 | 2018-06-05 | 郑州轻工业学院 | Hydrate cold-storage device based on refrigerant boiling-condensation cycle process |
| CN110748990A (en) * | 2019-10-11 | 2020-02-04 | 深圳市玖品空气净化科技有限公司 | Anion air purifier capable of removing ozone |
| CN114152013A (en) * | 2021-11-09 | 2022-03-08 | 大连理工大学 | Movable type hydrate phase change microcapsule cold accumulation system |
| CN114152013B (en) * | 2021-11-09 | 2023-08-11 | 大连理工大学 | Working method of movable hydrate phase-change microcapsule cold accumulation system |
| CN114484646A (en) * | 2022-02-11 | 2022-05-13 | 中南大学 | Refrigeration and cold accumulation system using hydrate slurry as working medium |
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| CN102494380B (en) | 2014-08-20 |
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Granted publication date: 20140820 Termination date: 20181213 |