CN103437839A - Method for implementing isothermal expansion in pneumatic equipment - Google Patents
Method for implementing isothermal expansion in pneumatic equipment Download PDFInfo
- Publication number
- CN103437839A CN103437839A CN2013103955880A CN201310395588A CN103437839A CN 103437839 A CN103437839 A CN 103437839A CN 2013103955880 A CN2013103955880 A CN 2013103955880A CN 201310395588 A CN201310395588 A CN 201310395588A CN 103437839 A CN103437839 A CN 103437839A
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- acting
- exchange material
- liquid
- gaseous state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a method for implementing isothermal expansion in pneumatic equipment. The method selects two unreactive substances which are in a gas state under normal temperature and pressure respectively as a work application substance and a heat exchange substance, and the boiling point of the heat exchange substance is higher than that of the work application substance. The method comprises steps as follows: a liquid-state heat exchange substance is injected into a high-pressure heat exchanger to generate the gas-state high-pressure heat exchange substance, the gas-state high-pressure heat exchange substance and the work application substance in a gas state, liquid state or gas/liquid mixed state are injected into the chamber, and the work application substance and the heat exchange substance in the chamber push the piston to apply work and cool down, so that the heat exchange substance is gradually liquefied and emits heat; and finally, in the second semi-cycle motion of the piston, exhaust composed of the liquid-stage heat exchange substance and the gas-state work application substance is discharged out of the chamber. The invention mainly optimizes the thermodynamic cycle process; the isothermal cycle is implemented to enhance the energy utilization efficiency of the aerodynamical equipment for a low-temperature cold source or any other energy source, thereby enhancing the energy density of the aerodynamical equipment.
Description
Technical field
The present invention relates to the pneumatic equipment technical field, relate in particular to the implementation method of the isothermal expansion in a kind of pneumatic equipment.
Background technique
At present, two leading Pneumatic power device companies are respectively French MDI company in the world, and the enlightening door cryogenic engine company of the U.S..
The core scheme that MDI company adopts is compressed-air actuated isobaric circulation drive scheme.The cardinal principle of this solution is:
Provide power source (high-pressure air) by compressed air bottle, with the pressure of approximately constant, pass into the cylinder acting, then the mode by heat exchange reclaims the interior energy produced in weary gas step-down process, and gas is discharged afterwards.
There is following shortcoming in this scheme:
1, the energy density of " fuel " is low.In isobaric circular work process, the energy density of acting material is nRT, and lower than the thermal insulation circulation, Technical Economy is poor.(wherein n is amount of substance, the mol of unit; R is thermodynamic equilibrium constant, and T is Kelvin temperature)
2, power performance is poor.In this solution, compressed-air actuated intensification mainly adopts the mode of weary gas heat exchange, does not have the active heat transfer process, is difficult to obtain the moment of torsion output of efficient stable.
The core scheme that enlightening door cryogenic engine company adopts is to utilize liquid air mode of phase change expansion in cavity externally to do work.The cardinal principle of this solution is:
The working medium be comprised of liquid nitrogen or liquid air is mixed with heat exchanger fluid in " firing chamber ", the heat of liquid acting material absorbing heat exchanger fluid, the acting of expanding in vaporescence.
There is following shortcoming in this scheme:
1, relevant experimental result shows, uses heat exchanger fluid, easily causes the problem of engine interior frosting.
2, energy density is low.Although compare with isobaric cyclic process, the capacity usage ratio of this circulation increases, its energy density is still far below battery, and Technical Economy is not good.
3, the low temperature validity of Lubricants.Because the vapourizing temperature of liquid nitrogen is extremely low, and the movable part such as piston need to experience chilling process, so lubricant oil need to guarantee effective greasy property under extremely low temperature.
4, thermodynamic cycle process complexity.Because the process need of the acting of expanding is realized isothermal circulation by the heat exchange between gas phase and liquid phase, its heat conduction efficiency is lower.In addition, the parameter that this process relates to is more, the more difficult realization of analysis and optimization.
Above two kinds in the air-powered motor field technology in international forward position, have a common problem, aerodynamic energy density is lower.This has not only wasted certain energy, and has reduced the Technical Economy of scheme.
For this problem, common solution is to improve the acting circulation, increases the caloric receptivity in the acting process.For the acting process, in multiple thermodynamic cycle process, isothermal circulation is a kind of relatively preferably.
Summary of the invention
The purpose of the embodiment of the present invention is for the structural shortcoming of prior art, the implementation method of the isothermal expansion in a kind of pneumatic equipment is proposed, the main thermodynamic cycle process of optimizing, improve the capacity usage ratio of aerodynamic force equipment to low temperature cold source or other energy sources by the mode that realizes isothermal circulation, thereby improve the energy density of aerodynamic force equipment.
In order to reach the foregoing invention purpose, the implementation method of the isothermal expansion in a kind of pneumatic equipment that the embodiment of the present invention proposes is achieved through the following technical solutions:
The implementation method of the isothermal expansion in a kind of pneumatic equipment, this pneumatic equipment comprises high pressure heat exchanger and with the chamber of mobilizable piston element, it is characterized in that, the method be chosen under pneumatic equipment operating ambient temperature and pressure be gaseous state two kinds of materials respectively as acting material and heat exchange material, between described acting material and heat exchange material, do not react, and the heat exchange material boiling point is higher than the acting material; The method is as follows: liquid heat exchange material is injected to high pressure heat exchanger and produce gaseous state high pressure heat exchange material, and this gaseous state high pressure heat exchange material and the acting material in gaseous state, liquid state or gas-liquid mixed state are injected to described chamber, described chamber sealing, described acting material and heat exchange material promote piston and do work and lower the temperature in chamber, in this process, described heat exchange material is liquefied gradually and is emitted heat, and described acting material absorbing heat also continues the acting of expanding; Finally, in the second half motion of piston, the weary gas that liquid heat exchange material and gaseous state acting material form is discharged from chamber.
The method also comprises step: by gas-liquid separation device, reclaim liquid heat exchange material in described weary gas.
The step of wherein a kind of technological scheme of method provided by the present invention is specific as follows: will jointly inject high pressure heat exchanger generation high pressure mixed gas in liquid acting material and heat exchange material, and afterwards this high pressure mixed gas be injected to described chamber.
The step of wherein a kind of technological scheme of method provided by the present invention is specific as follows: this gaseous state high pressure heat exchange material and liquid acting material are mixed to the described chamber of injection, the vaporization of described liquid acting material, and and the described gaseous state high pressure heat exchange material acting of jointly expanding.
The step of wherein a kind of technological scheme of method provided by the present invention is specific as follows: described gaseous state high pressure heat exchange material is injected to the chamber that contains gaseous state acting material, this gaseous state high pressure heat exchange material expands and does work.
The step of wherein a kind of technological scheme of method provided by the present invention is specific as follows: the liquid state part gaseous state acting material of discharging that does work in material and a upper circulation is mixed to form to gaseous state acting material, and injects described chamber and carry out adiabatic compression; Then described gaseous state high pressure heat exchange material injecting chamber is mixed with compressed gaseous state acting material.
In technique scheme, described acting material is nitrogen or air, and the boiling point span of described heat exchange material is higher than-196 ℃ under the standard condition.
Further preferred, described heat exchange material is propane or butane.
In technique scheme:
The term used " material " refers to a kind of chemical substance (for example propane), or the mixture be comprised of the number of chemical material (for example air).
Therefore stet statement, and material is made to definition.
The motion of the second half of piston refers to the process that chamber is moved to the piston of minimum volume by maximum volume.
Compared with prior art, the invention has the beneficial effects as follows: can realize isothermal circulation, than traditional thermal insulation circulation, improve the energy density of 60% left and right.Owing to using the gaseous state heat exchange material, make the recovery of weary gas become possibility.According to simulation, this also can, on the basis of common isothermal circulation, further improve 50% energy density.Moreover, good uniformity due to gaseous state isothermal circulation temperature distribution in cyclic process, can accomplish not have liquid acting material to participate in the acting process directly, the temperature of piston element increases compared to the scheme of enlightening valve engine company, has solved the problem of the low temperature validity of the interior frosting of motor and oiling agent.Simultaneously, because this technology can adopt multiple solution, the complexity of its thermodynamic process can be carried out type selecting as requested, can reduce the risk in the device miniaturization process.
The accompanying drawing explanation
By the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the present invention will become apparent and easily understand.
Fig. 1 is the Method And Principle schematic diagram in the embodiment of the present invention 1;
Fig. 2 is the Method And Principle schematic diagram in the embodiment of the present invention 2;
Fig. 3 is the Method And Principle schematic diagram in the embodiment of the present invention 3;
Fig. 4 is the Method And Principle schematic diagram in the embodiment of the present invention 4;
Embodiment
In common aerodynamic system, for guaranteed output, the acting process is generally shorter, and this has just caused in expansion acting process needing great heat exchange area and temperature difference that obvious heat exchange could occur.Based on this, can be similar to and be interpreted as an adiabatic circulation.In same original state, under the prerequisite identical with expansion ratio, the energy that isothermal circulation discharges is more.Research according to University of Washington shows, isothermal circulation can promote the energy density of 60% left and right compared to the thermal insulation circulation.The present invention just is being based on this, the implementation method of the isothermal expansion in a kind of pneumatic equipment is proposed, the main thermodynamic cycle process of optimizing, improve the capacity usage ratio of aerodynamic force equipment to low temperature cold source or other energy sources by the mode that realizes isothermal circulation, thereby improve the energy density of aerodynamic force equipment.
Technological core of the present invention is: in the topmost expansion acting of system process, the heat that the liquefaction of higher gaseous state heat exchange material discharges by boiling point comes to conduct heat to the acting material, with guarantee operation material in expansion acting process in Isothermal Condition.
Below in conjunction with accompanying drawing, by a plurality of embodiments, the present invention is described in further detail, so that technician's of the same trade understanding:
Embodiment 1:
It is shown in Figure 1 that (in legend, N2 is the acting material, and C3H8 is heat exchange material; L represents liquid, and g represents gaseous state), the isothermal expansion implementation method in the present embodiment 1 is: will and jointly inject high pressure heat exchanger in liquid heat exchange material in liquid acting material, the two vaporization forms high pressure mixing gas.Afterwards high pressure mixing gas is passed into to the chamber with mobilizable piston element.Then close air intake valve, the chamber sealing.Mixed gas expands and, to the piston acting, piston produces displacement under pressure, and mixed gas produces cooling trend simultaneously.In this process, the heat exchange material in mixed gas is because boiling point is higher, gradually liquefaction and with the acting separating substances, and discharge certain heat, acting material absorbing heat, and continue the acting of expanding.In the ideal situation, after heat exchange material is reduced to boiling temperature, liquefy gradually and the sustained release heat, before it all liquefies, the temperature of material of can making to do work remains at the boiling temperature (because the pressure of chamber changes, the boiling point of heat exchange material can change) of heat exchange material.Finally, in the second half motion of piston, drain tap is opened, and the weary gas that liquid heat exchange material and gaseous state acting material form is discharged from chamber.
Wherein, the selection for heat exchange material and acting material requires as follows:
1, the two is all gaseous state, and the gaseous state here refers under pneumatic equipment operating ambient temperature and pressure and is gaseous state.In conventional operating mode, select the gas that is gaseous state under normal temperature and pressure to get final product.
2, heat exchange material and acting material are all stable, and the two does not react.
3, the boiling point of heat exchange material is higher than the boiling point of acting material.
In a preferred embodiment, adopt the liquefied air acting material that is simple and easy to obtain, and the propane that the selection boiling point is-42.1 degree are as heat exchange material.With a two-stroke, the liquid air power engine of exporting about 45KW is specific embodiment, and the concrete steps of its work are as follows:
1, liquid air is mixed with certain proportion with propane, the ratio of mixing should be according to concrete operating mode decision, and the ratio of liquid air and propane is 5:1 in the present embodiment.
2, inject the copper pipe finned radiator through injected system and produce high pressure mixing gas.Wherein, the injected system type selecting is gear hydraulic pump, and operating mode is 3MPa, 30L/min; Requirement to the copper pipe finned radiator is, pressure reaches 3Mpa, and more than the temperature difference 30 degree, the low temperature side temperature is not less than-50 degree, more than hot exchange power reaches 130KW.
3,, through gas distribution system, the moment less in chamber volume injected high pressure mixing gas.Gas distribution system selects to adopt cam mechanism.
4, the expansion acting that is 10 through expansion ratio, the weary gas that pressure is the 2.4bar left and right will be discharged from.
5, piston, through the second half motion, is discharged chamber by weary gas.
6, propane part liquid in weary gas is reclaimed by gas-liquid separation device, mix with liquid air afterwards, start next circulation.
Embodiment 2:
In the present embodiment, the selection of acting material and heat exchange material is identical with embodiment 1, shown in Figure 2, and the concrete steps in the present embodiment 2 are as follows:
Liquid heat exchange material is injected to high pressure heat exchanger, make it vaporization and form the high-pressure gaseous heat exchange material, and be injected into the chamber with mobilizable piston element; The material injecting chamber of simultaneously liquid state being done work is mixed with the high-pressure gaseous heat exchange material.Liquid acting gasification substance, and together with the common acting of expanding in the chamber of sealing of high-pressure gaseous heat exchange material, in this process, heat exchange material liquefaction heat release.The acting material will absorb heat, and continue the acting of expanding.Finally, in the second half motion of piston, drain tap is opened, and the weary gas that liquid heat exchange material and gaseous state acting material form is discharged from chamber.
Embodiment 3:
In the present embodiment, the selection of acting material and heat exchange material is identical with embodiment 1, shown in Figure 3, and the concrete steps in the present embodiment 3 are as follows:
Liquid heat exchange material is injected to high pressure heat exchanger, make it vaporization and form the high-pressure gaseous heat exchange material, and be injected into the chamber with mobilizable piston element that contains a certain amount of gaseous state acting material.The air intake valve of chamber is closed, and mixed gas does work to piston, and piston produces displacement under pressure, and mixed gas produces cooling trend owing to expanding.In the acting process, the heat exchange material in mixed gas, because boiling point is higher, automatically liquefies and separates.Acting material in mixed gas will absorb heat, and continue the acting of expanding.Finally, in the second half motion of piston, drain tap is opened, and the weary gas that liquid heat exchange material and gaseous state acting material form is discharged from chamber.
Embodiment 4:
In the present embodiment, the selection of acting material and heat exchange material is identical with embodiment 1, shown in Figure 4, and the concrete steps in the present embodiment 4 are as follows:
Liquid heat exchange material is injected to high pressure heat exchanger, make it vaporization, form the high-pressure gaseous heat exchange material.The material that simultaneously liquid state done work mixes the described chamber of injection with the acting material of the part gaseous state of discharging in a upper circulation and carries out adiabatic compression.Liquid acting material can provide cold by processes such as vaporization, intensifications, and form gaseous state acting material, and adiabatic compression herein refers in short-term, the container variance ratio is less, and the vaporization of operative liquid material causes material density to increase, and brought thus compression effectiveness.Then gaseous state high pressure heat exchange material injecting chamber is mixed with compressed gaseous state acting material.Under pressure, piston produces displacement, and mixed gas does work to piston, after expanding, produces cooling trend.In the acting process, the liquid heat exchange material of the vaporization in mixed gas, because boiling point is higher, automatically liquefies and separates.Finally, in the second half motion of piston, the weary gas that liquid heat exchange material and gaseous state acting material form is discharged from chamber.
Abovely by a plurality of embodiments, for invention intention of the present invention and mode of execution, be elaborated; but one of ordinary skill in the art of the present invention are appreciated that; the above embodiment of the present invention is only one of the preferred embodiments of the present invention; for the length restriction; here can not all mode of executions of particularize; any enforcement that can embody the claims in the present invention technological scheme, all in protection scope of the present invention.
It should be noted that; above content is in conjunction with concrete mode of execution further description made for the present invention; can not assert that the specific embodiment of the present invention only limits to this; under the guidance of above-described embodiment; those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion drop in protection scope of the present invention.
Claims (8)
1. the implementation method of the isothermal expansion in a pneumatic equipment, this pneumatic equipment comprises high pressure heat exchanger and with the chamber of mobilizable piston element, it is characterized in that, the method be chosen under pneumatic equipment operating ambient temperature and pressure be gaseous state two kinds of materials respectively as acting material and heat exchange material, between described acting material and heat exchange material, do not react, and the heat exchange material boiling point is higher than the acting material; The method is as follows: liquid heat exchange material is injected to high pressure heat exchanger and produce gaseous state high pressure heat exchange material, and this gaseous state high pressure heat exchange material and the acting material in gaseous state, liquid state or gas-liquid mixed state are injected to described chamber, described chamber sealing, described acting material and heat exchange material promote piston and do work and lower the temperature in chamber, in this process, described heat exchange material is liquefied gradually and is emitted heat, and described acting material absorbing heat also continues the acting of expanding; Finally, in the second half motion of piston, the weary gas that liquid heat exchange material and gaseous state acting material form is discharged from chamber.
2. the implementation method of the isothermal expansion in a kind of pneumatic equipment according to claim 1, is characterized in that, the method also comprises step: by gas-liquid separation device, reclaim liquid heat exchange material in described weary gas.
3. the implementation method of the isothermal expansion in a kind of pneumatic equipment according to claim 2, it is characterized in that, the step of the method is specific as follows: will jointly inject high pressure heat exchanger generation high pressure mixed gas in liquid acting material and heat exchange material, and afterwards this high pressure mixed gas be injected to described chamber.
4. the implementation method of the isothermal expansion in a kind of pneumatic equipment according to claim 2, it is characterized in that, the concrete steps of the method are as follows: this gaseous state high pressure heat exchange material and liquid acting material are mixed to the described chamber of injection, the vaporization of described liquid acting material, and and the described gaseous state high pressure heat exchange material acting of jointly expanding.
5. the implementation method of the isothermal expansion in a kind of pneumatic equipment according to claim 2, it is characterized in that, the concrete steps of the method are as follows: described gaseous state high pressure heat exchange material is injected to the chamber that contains gaseous state acting material, this gaseous state high pressure heat exchange material expands and does work.
6. the implementation method of the isothermal expansion in a kind of pneumatic equipment according to claim 2, it is characterized in that, the concrete steps of the method are as follows: the liquid state part gaseous state acting material of discharging that does work in material and a upper circulation is mixed to form to gaseous state acting material, and injects described chamber and carry out adiabatic compression; Then described gaseous state high pressure heat exchange material injecting chamber is mixed with compressed gaseous state acting material.
7. according to the implementation method of the isothermal expansion in the described a kind of pneumatic equipment of claim 1-6 any one, it is characterized in that: described acting material is nitrogen or air, and the boiling point span of described heat exchange material is higher than-196 ℃ under the standard condition.
8. the implementation method of the isothermal expansion in a kind of pneumatic equipment according to claim 7, it is characterized in that: described heat exchange material is propane or butane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310395588.0A CN103437839B (en) | 2013-09-03 | 2013-09-03 | Method for implementing isothermal expansion in pneumatic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310395588.0A CN103437839B (en) | 2013-09-03 | 2013-09-03 | Method for implementing isothermal expansion in pneumatic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103437839A true CN103437839A (en) | 2013-12-11 |
| CN103437839B CN103437839B (en) | 2015-05-13 |
Family
ID=49691544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310395588.0A Expired - Fee Related CN103437839B (en) | 2013-09-03 | 2013-09-03 | Method for implementing isothermal expansion in pneumatic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103437839B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009020642A1 (en) * | 2009-05-09 | 2010-11-11 | Robert Bosch Gmbh | Vehicle i.e. rail vehicle, has pneumatic storage system provided for storing kinetic energy, and existing engine cooling system provided for approximate isothermal compression and isothermal expansion of gas |
| US20110314803A1 (en) * | 2008-04-09 | 2011-12-29 | Mcbride Troy O | Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange |
| CN102431432A (en) * | 2011-11-17 | 2012-05-02 | 广州中国科学院工业技术研究院 | Natural gas and compressed air mixed power device |
| US8453444B2 (en) * | 2010-01-11 | 2013-06-04 | David Haynes | Power plant using compressed or liquefied air for energy storage |
-
2013
- 2013-09-03 CN CN201310395588.0A patent/CN103437839B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110314803A1 (en) * | 2008-04-09 | 2011-12-29 | Mcbride Troy O | Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange |
| DE102009020642A1 (en) * | 2009-05-09 | 2010-11-11 | Robert Bosch Gmbh | Vehicle i.e. rail vehicle, has pneumatic storage system provided for storing kinetic energy, and existing engine cooling system provided for approximate isothermal compression and isothermal expansion of gas |
| US8453444B2 (en) * | 2010-01-11 | 2013-06-04 | David Haynes | Power plant using compressed or liquefied air for energy storage |
| CN102431432A (en) * | 2011-11-17 | 2012-05-02 | 广州中国科学院工业技术研究院 | Natural gas and compressed air mixed power device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103437839B (en) | 2015-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tian et al. | Challenges and opportunities of Rankine cycle for waste heat recovery from internal combustion engine | |
| Aphornratana et al. | Analysis of a combined Rankine–vapour–compression refrigeration cycle | |
| US8276384B2 (en) | Ambient temperature thermal energy and constant pressure cryogenic engine | |
| Xue et al. | A review of cryogenic power generation cycles with liquefied natural gas cold energy utilization | |
| JP2008544153A (en) | A low-temperature engine-compressor unit with an active chamber that continuously burns "cold" at constant pressure | |
| CN104929706A (en) | Combined circulating energy supply system | |
| US20110203267A1 (en) | Method and device for operating a stirling cycle process | |
| CN102398496A (en) | Air-conditioning system of automobile for improving condensing effect by gasifying liquefied natural gas (LNG) | |
| CN101603749A (en) | A kind of auto-cascade injection low-temperature refrigeration circulating device | |
| CN103743150A (en) | Absorption compression type automatic-overlapping refrigerating system and use method | |
| CN109826683A (en) | A kind of organic Rankine cycle power generation system that can efficiently utilize cryogenic cold energy | |
| CN108266229B (en) | Adiabatic constant voltage compressed air energy storage system based on volatile fluid | |
| Arkharov et al. | Use of Dimethyl Ether as a Motor Fuel and a Refrigerant. | |
| CN109690032B (en) | Mechanical system for generating mechanical energy by using liquid nitrogen and corresponding method | |
| CN105066508A (en) | Efficient injection and absorption refrigerator for freezing and refrigeration | |
| CN103046976A (en) | Low-temperature heat engine device | |
| CN105115184A (en) | Absorption refrigeration system with deep refrigeration function | |
| CN103437839B (en) | Method for implementing isothermal expansion in pneumatic equipment | |
| CN117006408A (en) | Liquid hydrogen storage and supply system capable of being started quickly and method thereof | |
| RU175179U1 (en) | Cryogenic Power Plant | |
| CN107364564B (en) | Absorption-type and thermoelectric refrigeration CO-assisted supercooling CO 2 Refrigerating system for ship | |
| CN105546870A (en) | Supergravity thermal drive refrigeration device and method | |
| CN105091401A (en) | Jet absorption refrigerating device with copious cooling effect | |
| CN107702429B (en) | Energy efficiency improving device and method for liquid air energy storage system | |
| CN102721223B (en) | Novel refrigerating machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20150903 |
|
| EXPY | Termination of patent right or utility model |