CN100408809C - Electrical power supply system - Google Patents
Electrical power supply system Download PDFInfo
- Publication number
- CN100408809C CN100408809C CNB2003801053504A CN200380105350A CN100408809C CN 100408809 C CN100408809 C CN 100408809C CN B2003801053504 A CNB2003801053504 A CN B2003801053504A CN 200380105350 A CN200380105350 A CN 200380105350A CN 100408809 C CN100408809 C CN 100408809C
- Authority
- CN
- China
- Prior art keywords
- gas
- pressure
- decompressor
- container
- power supply
- 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.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/02—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F01C1/0207—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/18—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
- F02C6/14—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
- F02C6/16—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads for storing compressed air
-
- 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
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
A system for providing back-up electrical power in the event of failure of the utility electrical supply, which comprises a vessel (11) adapted to contain a volume of compressed gas supplied by a compressor (10), a solenoid valve (14) to release gas from the vessel (11) through a pressure regulator (12) to a scroll expander (15) containing a rotary member which, through the passage of gas, drives a generator (16) thus to generate a supply of electrical power. A power conditioning unit (17) and electronic control (13) determine the operation of the system which occurs automatically upon failure of the utility electrical supply thus to provide a truly uninterrupted power supply for installations such as computers and communication systems.
Description
Technical field
The present invention relates to a kind of system that is used to produce stand-by electric energy, thereby can provide uninterruptible power to the device as computer or communication system.
Background technique
Generally, stand-by electric energy is powered by alternate generator, and alternate generator need use mineral fuel, and is often started by battery.It is shorter with the working life of battery that uninterruptible power is provided to be used to start alternate generator or storage of electrical energy, and needs carry out a large amount of maintenance works to it.In the higher area of temperature, also can follow the problem that battery life further shortens to occur, and not only need the required electric energy of supplies electrons control system, also to utilize air-conditioning equipment that it is lowered the temperature.
Summary of the invention
One object of the present invention is to provide a kind of system that produces stand-by electric energy, also for maintenance system provides nice and cool environment, it is worked under a low temperature environment simultaneously.Such power generation system will not relied in mineral fuel and battery and be used.
According to the present invention, it provides a kind of system that is used to produce stand-by electric energy, comprise the container that is used to hold a certain amount of pressurized gas, be used for the valve that the gas with described container discharges with predetermined pressure, be used to the scroll expander that receives described release gas and it is passed through, and it has rotatable parts, can under the effect of the air-flow that discharges by decompressor, rotate, and driving is connected to the generator of decompressor rotatable components, thereby generation electric energy, also comprise the power adjustment unit simultaneously, it has at least one capacitor with storage of electrical energy, thereby but stand-by electric energy is provided within a short period of time, can produce required electric energy until described scroll expander and generator.
Gas pressure in the described container is about 300 crust, and electric energy just is stored in the gas of this container.Stored energy can be because of environment temperature reduce in the described gas, thereby reliable energy aggregate reserves can be provided, and operating life is longer.The expansion that described pressurized gas takes place can be replied and is mechanical energy, and this mechanical energy changes electric energy into by the effect of generator.By the running of native system, when the needs electric energy, described pressurized air discharges from container by regulator, thereby generates the decompression air-flow that is about 10 bar pressures.This gas is supplied in the described scroll expander then, passes through described this decompressor of air-flow mechanical rotation herein afterwards, makes the generator mechanical rotation by the axle that is connected on the scroll expander then, thereby required electric energy is provided.
Description of drawings
Embodiments of the invention will only describe by example and accompanying drawing thereof, wherein:
Fig. 1 is first embodiment's the block diagram of primary clustering that is used to generate the described system of stand-by electric energy;
Fig. 2 is second embodiment's a block component diagram;
Fig. 3 is described to be a control algorithm; With
Fig. 4 is described to be the system component of recovered energy from Fig. 1 and Fig. 2 system.
Embodiment
System shown in Figure 1 comprises multi-staged air compressor dryer 10, is used for to compressed-air actuated pressurized container 11 air feed that fill such as 300 liters of dryings, and can provides and be equivalent to 11 kilowatt-hours energy.Dry air is stored in-30 ℃ the environment.Dry gas is extremely important, and it can prevent that Steel Vessel 11 from corroding, and container generation accumulated ice can prevent that gas from expanding the time.The effect of the pressurized gas of 300 crust can make the energy storage of suitable density in less relatively space.Compressor 10 is driven by multiple power source.
Air compression can be produced a large amount of low grade heat down to so high pressure, they or from compressor, discharge, or be applied to some other occasions.Container 11 can be made by steel structure, and it is similar to and is used to store the industrial production gas containers.Selectable, described container also can be made by carbon fiber, is used to store the container of compressed natural gas as those in automotive industry.
What be positioned at container 11 downstreams is pressure regulator 12, and it is in order to receiving the pressurized air from container 11, and the pressure of stored air can be adjusted to the working level about 10 crust.The delivery pressure of described regulator is controlled by electronic operation control system 13, to determine the output of system.
In the outlet port of pressure regulator 12, solenoid electric valve 14 is installed, it is in open mode in the ordinary course of things, then is in closed state after the energising.When multiple power source was worked, described electric valve was closed; And when power supply was stopped power supply, valve open was with the air of supply from described regulator.After solenoid electric valve 14 was opened, the air of storage passed from described regulator 12, and by entering in the scroll expander 15 behind the solenoid electric valve 14.The functional equivalent of this device uses its repacking back in no oily vortex-type compressor as decompressor.When real work, force value is that the pressurized gas of 10 crust passes decompressor, and is expanded to atmospheric pressure therein, because the gas expansion, the axle 15a in the decompressor 15 rotates.
After expanding gas leaves scroll expander 15, be in drying, do not have oil, free of contamination state, and temperature is below 0 ℃.This cool air is used for the electronic equipment of cooling system, and the space temperature of adjusting electronic equipment is very desirable.
Compare with common most of reciprocating expansion engines, blade type decompressor or turbo type decompressor, scroll expander has higher working efficiency.
On the axle 15a of decompressor 15, mechanical connection has electromagnetic generator 16, can supply for example 48 volts VDC.According to actual needs, but utilized device this output voltage values of electromagnetic engine is raise or reduces, with the supply standby power supply.
The 17 pairs of out-put supplies in power adjustment unit are controlled, and provide electric energy to control unit 13 simultaneously.Described unit 17 comprises a plurality of capacitors, to store small amount of electrical energy.These capacitors are charged to it fully by main multiple power source, when quitting work with convenient power supply, described capacitor can provide stand-by electric energy, can produce required electric energy until scroll expander 15 and generator 16, and this process generally needs the time of one second or several seconds.Therefore, this system can provide uninterruptable power supply (UPS) truly, and is not only that stand-by electric energy is provided.
In use, if but general multiple power source proper functioning, described scroll expander system then quits work, and stand-by electric energy is stored in the container 11.
When multiple power source quits work, then need uninterruptable power source to carry out work at once.
When the power supply supply is broken down, reach initial a period of time that operating rate also can outwards provide required electric energy in scroll expander 15 and generator 16, can utilize the stored energy of described capacitor energy store that is arranged in power adjustment unit 17 to obtain required electric energy.
Further, second function of described unit 17 is that when required load took place to change fast, it can make reaction slower decompressor 15 and generator 16 match.For example, suppose that power supply output is changed to 600 watts from 300 watts with being close to moment, and because described system needs the regular hour that the variation of load is made a response, thereby during this period of time, energy stored in the described capacitor energy store just can remedy the required electric energy of system.Opposite, ground is changed to 300 watts from 600 watts if power supply output is close to moment, described expander/generator needs the regular hour to reach less speed and output equally, and during this period of time, described capacitor energy store can absorb the unnecessary electric energy that expander/generator is sent.
Will be appreciated that, provide a kind of uninterruptable power source truly with the pairing system of the present invention, it can store and discharge does not have oily, clean and dry air, be discharged to decompressor 15 outsides afterwards, and can be used for electronic equipment is carried out air conditioning and cooling, and and do not rely on and use mineral fuel or battery.Described compressor 10 and decompressor 15 in fact all use in no oil environment, thereby can avoid the air in it to be polluted.
Referring now to Fig. 2,, it is depicted as second embodiment, and the electric current of the system that wherein flows through has obtained reinforcement.This multiple power source is shown among the figure 201, and it comprises an ac power supply, and this ac power supply is subjected to the rectified action of rectifier 202, afterwards by direct current connection device (DC link), and transforms in power supply converter 204, makes it to be suitable for and required load.
Described direct current connection device comprises capacitor energy store 212, voltage measuring apparatus VMD and current measuring device CMD.
Described power supply converter 204 can provide such as 48 volts of DC electrical source that are used for communications equipment, but selectable, power supply converter 204 also can be set to the power supply phase inverter, thereby provides synthetic ac power supply for power supply frequency and voltage loads.
When multiple power source can interrupt, described system will make pressurized air supply 206 switch to working state, and its function is as gas receiver 11 among Fig. 1.Energy storage is in pressurized air, and can flow through air solenoid 207 and Electronic air conditioner 208.Described regulator 208 can play the effect of flow controller, can regulate air-flow, and the air flow direction scroll expander 209 afterwards, and expands therein.
209 pairs of E-communication generators of scroll expander 210 carry out Mechanical Driven, make it to produce alternating current (a.c.).Second rectifier, 211 output terminals are connected on the direct current connection device 203, and it can be converted into direct current (d.c.) with above-mentioned alternating current (a.c.), and the described direct current connection device thereby electric current is flowed through arrives out-put supply converter 204, provides power supply to load 205 afterwards.
In order to make decompressor 209 have the enough time to reach its critical operating rate, and the rapid variation that required load takes place made a response, capacitor energy store 212 is installed on the direct current connection device.
In the gas working procedure, when promptly described multiple power source took place to be interrupted, 213 pairs of electric currents of electronic controller were adjusted.Control algorithm as shown in Figure 3, wherein the voltage and current of direct current connection device is monitored at 301 places all the time, and signal amplifier calculates required electric energy at 302 places.This controller comprises mathematical model 303, and it is used for described decompressor, can export required air pressure according to the load needs.
Simultaneously, actual DC connection voltage is connected voltage with the point of adjustment direct current at 304 places and compares, and generates whole error signals afterwards at 305 places.Behind this signal process proportional-integral-derivative (PID) controller 306 and the bridle 307, produce pressure adjustment signal.
At last,, come the loading demand amount of self model 303 to derive before pressure signal passes in slave controller 213, gather with pressure adjustment signal one 308 places that coexist, to set up Electronic air conditioner 208 and air solenoid 207 as set pressure signal 309.
By existing power supply relay 214, controller 213 is monitored the multiple power source at 201 places all the time.The existing power supply signal at 310 places passes signal inverter 311, is used to control described air solenoid 207, and the set pressure signal at 309 places is shielded.Like this, when power work just often, air solenoid 207 is in " closing " state, just can stop described set pressure signal.
Existing air expander tends to air is not exclusively compressed, thereby still also has sizable energy in its waste gas of discharging, and its air pressure still is higher than barometric pressure.Contained energy in the recyclable this incomplete pressurized gas of system hereinafter described, thus the efficient of described system improved.
The compression ratio of air expander will be lower than driving air pressure and atmospheric ratio.For example, the expansion ratio of air expander 15,209 can be 3: 1.It is the air of 9 crust that such decompressor may need the supply pressure value, to reach required output power.In this case, the air pressure value behind the discharge decompressor is about 3 crust, still also has lot of energy.Fig. 4 is described to be the system of recovered energy from the compressed exhaust gas of discharging.
Under the situation of low compression ratio decompressor mentioned above,, then can reduce the loss of energy if, make the force value in decompressor outlet port be higher than barometric pressure by using the standby pressure modulating valve.Be this kind valve among Fig. 4 shown in 41.Owing to air can be boosted to much larger than the required pressure of decompressor, thereby high-pressure air can be used for increasing the pressure of portion gas in the decompressor, generates the required air quantity of certain energy to reduce.
Pressurized gas at first must reduce to normal pressure, so that drive decompressor Venturi 42 by regulator 43.Driving air enters in the described Venturi subsequently, because air pressure is a barometric pressure in the decompressor, perhaps when configuration pressure relief valve 41, air pressure is higher than barometric pressure in the decompressor, thereby under the effect that drives air, carried secretly from the low-pressure air of decompressor outlet.Thereby the low tension outlet air enters in the described Venturi 42 by non-reflux valve 45.The head pressure value of this mixed gas is between the force value that drives air and entrapped air.
If load needs variable power, then also need to dispose pressure regulator 46, enter the gas pressure of decompressor with responsive control signal adjustment.This regulator is equivalent to shown among Fig. 2 208, and by electronic control system 213 operations.
Also can be equipped with valve 47 in addition, both can be used as regulator and guaranteed can provide sufficient air when gas demand is big, also can be used as solenoid valve and use, when the force value at source of high pressure air place was not enough to drive Venturi 42, this valve just can be closed.
Figure 4 shows that at each valve/regulator and corresponding common operating air pressure.Under this air pressure, about 25% gas that passes decompressor will be discharged by Venturi, enter in the decompressor once more afterwards.
The system consistent with the present invention described here is used to produce standby power supply, and can have long-range charging ability.That is to say, storeroom can be installed, is preloaded in certain remote location, and charge into high-pressure air in storeroom that described remote location is such as being telecommunication terminal, it installs the battery that is used to provide standby power supply usually.Thereby, as described here, if needed, promptly when multiple power source work is broken down, power generation system can be fit in the remote terminal chamber and carry out work.Thereby described standby power system by compressed air-driven can carry out work when needed, and compares with the reserve battery storage element, and this system takes up room and is much smaller.The volume that is used to hold compressed-air actuated casing or storeroom can be bigger, and can place ground or underground, or in the independent housing of packing into, thereby when its work of needs, can change it very easily, so just not need to occupy the space in the common remote terminal chamber.
Do not wish to limit the present invention to above-mentioned example.For example, can not hold air in the container 11, but other gases that from industrial production, obtain.And, also a plurality of these type of container tandems can be connected, thereby, under the situation of short-term frequent generation multiple power source job failure in the time, can improve the operating life of described system.
Claims (17)
1. a system that produces standby power supply comprises: the container that is used to hold a certain amount of pressurized gas; Be used for the valve of under predetermined pressure, gas being discharged from container; Be used to receive and transmit the Worm type decompressor of described discharge gas, this decompressor has rotatable parts, and these rotatable parts rotate under the effect of the described discharge gas that described decompressor transmits; Drive generator coupled with the rotatable parts of described decompressor, thereby power.
2. the system as claimed in claim 1 comprises pressure regulator, and the gas pressure that this pressure regulator will be discharged from described container reduces to working pressure, and described gas is introduced in the described scroll expander under this working pressure.
3. the system as claimed in claim 1 comprises the multi-staged air compressor dryer, and it is connected on the container, is used for providing the compression drying air to container.
4. the system as claimed in claim 1, the gas pressure in the wherein said container are 300 crust or about 300 crust, and critical temperature be-30 ℃ or about-30 ℃.
5. system as claimed in claim 3, wherein said multi-staged air compressor can be driven by multiple power source.
6. system as claimed in claim 2, wherein said pressure regulator and gas relief valve are connected on the electronic operation control system.
7. system as claimed in claim 2, wherein said gas release valve under normal circumstances is in open mode, after power supply, be in closed condition, in use, described valve is in closed condition under the situation of multiple power source work, valve open when multiple power source quits work is with from described regulator supply gas.
8. the system as claimed in claim 1, wherein said scroll expander is no oily scroll bar type compressor, and its repacking back is used as decompressor.
9. the system as claimed in claim 1, wherein said scroll expander is discharged gas, makes it be expanded to atmospheric pressure being lower than under the temperature of ambient air temperature.
10. the system as claimed in claim 1, comprise the power adjustment unit, it comprises the energy storage system that is used for stored energy, but thereby provide standby power supply within a short period of time, can produce required electric energy until described scroll expander and generator, described energy storage system also discharges or absorbs electric energy simultaneously under the situation that power supply requirement changes.
11. system as claimed in claim 10, wherein said energy storage system is at least one capacitor.
12. system as claimed in claim 10, wherein said power adjustment unit comprises the direct current connection device, and it comprises capacitor energy store, voltage measuring apparatus and current measuring device.
13. the system as claimed in claim 1 comprises the equipment that will reclaim from the portion gas that the decompressor delivery outlet is discharged and be entrained in the gas that is supplied to decompressor from container.
14. the system as claimed in claim 1 comprises a plurality of containers, each container all can hold amount of compressed gas, and these containers are cascaded.
15. the system as claimed in claim 1, comprise regulator, described regulator will be introduced gas flow modulation in the described Worm type decompressor to a certain pressure/airflow rate, and this pressure/airflow rate is according to providing the required power level of load of standby power supply to determine.
16. system as claimed in claim 15, wherein said regulator is controlled with the input value of measuring voltage and electric current by the electric operating control system.
17. the system as claimed in claim 1 when being connected to the load that needs variable power supply, then connects uninterruptable power source thereon.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0228599.7A GB0228599D0 (en) | 2002-12-07 | 2002-12-07 | Electrical power supply system |
| GB0228599.7 | 2002-12-07 | ||
| GB0309834.0 | 2003-04-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1723337A CN1723337A (en) | 2006-01-18 |
| CN100408809C true CN100408809C (en) | 2008-08-06 |
Family
ID=9949277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801053504A Expired - Fee Related CN100408809C (en) | 2002-12-07 | 2003-12-02 | Electrical power supply system |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4863446B2 (en) |
| CN (1) | CN100408809C (en) |
| CY (1) | CY1107999T1 (en) |
| GB (2) | GB0228599D0 (en) |
| PT (1) | PT1567748E (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5597589B2 (en) * | 2011-04-19 | 2014-10-01 | 株式会社神戸製鋼所 | Screw expander |
| US8907524B2 (en) * | 2013-05-09 | 2014-12-09 | Expansion Energy Llc | Systems and methods of semi-centralized power storage and power production for multi-directional smart grid and other applications |
| JP6944262B2 (en) * | 2017-03-29 | 2021-10-06 | 株式会社神戸製鋼所 | Compressed air storage power generator |
| CN110307142B (en) * | 2019-06-28 | 2020-09-29 | 大唐半导体科技有限公司 | Control method of air compressor and air compressor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4281256A (en) * | 1979-05-15 | 1981-07-28 | The United States Of America As Represented By The United States Department Of Energy | Compressed air energy storage system |
| US5337560A (en) * | 1992-04-02 | 1994-08-16 | Abdelmalek Fawzy T | Shock absorber and a hermetically sealed scroll gas expander for a vehicular gas compression and expansion power system |
| GB2342955A (en) * | 1998-10-20 | 2000-04-26 | Chester Barnett Richard Alexan | Motorised transportation |
| US6142755A (en) * | 1997-09-19 | 2000-11-07 | Hitachi, Ltd. | Scroll compressor and method of manufacturing same |
| US6276123B1 (en) * | 2000-09-21 | 2001-08-21 | Siemens Westinghouse Power Corporation | Two stage expansion and single stage combustion power plant |
| US20010043878A1 (en) * | 2000-03-31 | 2001-11-22 | Sullivan Timothy J. | Involute spiral wrap device |
| WO2002090747A2 (en) * | 2001-05-07 | 2002-11-14 | Battelle Memorial Institute | Heat energy utilization system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56165701A (en) * | 1980-05-23 | 1981-12-19 | Hitachi Ltd | Power generator |
| JP3104414B2 (en) * | 1992-07-21 | 2000-10-30 | 株式会社日立製作所 | Synchronous rotary scroll fluid machine |
| JPH07170660A (en) * | 1993-10-15 | 1995-07-04 | Sony Tektronix Corp | Power supply device |
| JPH10257696A (en) * | 1997-03-14 | 1998-09-25 | Shinko Electric Co Ltd | Emergency power supply equipment |
| JP2000032685A (en) * | 1998-07-10 | 2000-01-28 | Shinko Pantec Co Ltd | Uninterruptible power supply system |
| JP4079403B2 (en) * | 1999-05-17 | 2008-04-23 | 株式会社パワーシステム | Series-parallel switching capacitor power storage device |
-
2002
- 2002-12-07 GB GBGB0228599.7A patent/GB0228599D0/en not_active Ceased
-
2003
- 2003-04-29 GB GBGB0309834.0A patent/GB0309834D0/en not_active Ceased
- 2003-12-02 JP JP2005502330A patent/JP4863446B2/en not_active Expired - Fee Related
- 2003-12-02 PT PT03780323T patent/PT1567748E/en unknown
- 2003-12-02 CN CNB2003801053504A patent/CN100408809C/en not_active Expired - Fee Related
-
2007
- 2007-02-05 CY CY20071100154T patent/CY1107999T1/en unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4281256A (en) * | 1979-05-15 | 1981-07-28 | The United States Of America As Represented By The United States Department Of Energy | Compressed air energy storage system |
| US5337560A (en) * | 1992-04-02 | 1994-08-16 | Abdelmalek Fawzy T | Shock absorber and a hermetically sealed scroll gas expander for a vehicular gas compression and expansion power system |
| US6142755A (en) * | 1997-09-19 | 2000-11-07 | Hitachi, Ltd. | Scroll compressor and method of manufacturing same |
| GB2342955A (en) * | 1998-10-20 | 2000-04-26 | Chester Barnett Richard Alexan | Motorised transportation |
| US20010043878A1 (en) * | 2000-03-31 | 2001-11-22 | Sullivan Timothy J. | Involute spiral wrap device |
| US6276123B1 (en) * | 2000-09-21 | 2001-08-21 | Siemens Westinghouse Power Corporation | Two stage expansion and single stage combustion power plant |
| WO2002090747A2 (en) * | 2001-05-07 | 2002-11-14 | Battelle Memorial Institute | Heat energy utilization system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4863446B2 (en) | 2012-01-25 |
| CY1107999T1 (en) | 2013-09-04 |
| GB0309834D0 (en) | 2003-06-04 |
| JP2006509158A (en) | 2006-03-16 |
| PT1567748E (en) | 2007-02-28 |
| GB0228599D0 (en) | 2003-01-15 |
| CN1723337A (en) | 2006-01-18 |
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