EP4078015A1 - Dispositif de compression de gaz - Google Patents
Dispositif de compression de gazInfo
- Publication number
- EP4078015A1 EP4078015A1 EP20830235.6A EP20830235A EP4078015A1 EP 4078015 A1 EP4078015 A1 EP 4078015A1 EP 20830235 A EP20830235 A EP 20830235A EP 4078015 A1 EP4078015 A1 EP 4078015A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- pipe
- expansion
- compressed
- pressure
- 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
- 230000006835 compression Effects 0.000 claims abstract description 32
- 238000007906 compression Methods 0.000 claims abstract description 32
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 59
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- 239000003345 natural gas Substances 0.000 description 9
- 239000003570 air Substances 0.000 description 8
- 239000012528 membrane Substances 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/06—Fluid distribution
- F17C2265/068—Distribution pipeline networks
Definitions
- the present invention relates to a gas compression device.
- NVM natural gas stations for vehicles
- CNG compressed natural gas
- the present invention aims to remedy all or part of these drawbacks.
- the present invention relates to a device for compressing a gaseous fluid by recovering the expansion energy of a gas between an upstream gas network under a pressure Pa and a downstream gas network under a pressure Pb less than Pa, which includes:
- a pneumatic booster comprising a free piston between an expansion chamber and a compression chamber
- a fourth compressed gaseous fluid line connected to an outlet of the compression chamber.
- the device which is the subject of the invention uses, in order to use the expansion energy of a fluid to compress a second, a free piston booster.
- the device which is the subject of the invention makes it possible, by recovering the expansion energy of a gas coming from a gas network at pressure Pa and going into a gas network at pressure Pb, where Pa> Pb, therefore without energy expenditure, compress a gaseous fluid.
- This gaseous fluid is, for example, gas coming from the upstream network, from a gas reservoir or from the atmosphere. Once compressed, this gaseous fluid supplies a reservoir, for example a natural gas station for vehicles ("CNG”) or a compressed gas network (“CNG" or compressed air).
- CNG natural gas station for vehicles
- CNG compressed gas network
- the free piston comprises an expansion head and a compression head connected by a shaft, a through opening opening out, on the one hand, into the expansion head on the side opposite the compression head and, on the other hand, into a side wall of the tree,
- the outlet of the expansion chamber to which the second pipe is connected is located on a side face of the expansion chamber and is not obstructed by the expansion head until the through opening does not open into the pressure chamber. relaxation.
- the free piston booster operates without an external moving part as long as there is a pressure difference between the first pipe and the second pipe.
- the device of the invention further comprises a valve on the first pipe controlled by a pressure switch positioned downstream of the fourth pipe.
- an increase in pressure, downstream of the fourth pipe causes the supply of the device to be stopped with gas to be expanded.
- the device of the invention further comprises an all-or-nothing pressure regulator on the first pipe, the impulse line of which is placed downstream of the fourth pipe.
- an increase in pressure, downstream of the fourth pipe causes the supply of the device to be stopped with gas to be expanded.
- the third pipe is connected, at its inlet, to the upstream network, the gas to be compressed being the gas from the upstream network.
- this gas is natural gas, once compressed, it supplies a reservoir of a natural gas station for vehicles ("NGV”) or a compressed natural gas network (“CNG").
- NVM natural gas station for vehicles
- CNG compressed natural gas network
- the third pipe is connected, at its inlet, to a reservoir of gas to be compressed.
- the third pipe is connected, at its inlet, to the atmosphere.
- the fourth pipe connects the compression chamber to a compressed gas reservoir or to a compressed gas circuit.
- the device can thus supply a compressed air tank or a compressed air circuit.
- the device of the invention further comprises a heat exchanger configured to heat the gas passing through the first pipe and to cool the compressed gaseous fluid passing through the fourth pipe.
- the device of the invention further comprises a pressure regulator on the fourth pipe.
- This pressure regulator prevents pressure surges at the outlet of the fourth pipe.
- FIG. 1 shows, schematically, a first particular embodiment of the device of the invention
- FIG. 2 shows, schematically, a second particular embodiment of the device of the invention
- FIG. 3 shows, schematically, a third particular embodiment of the device of the invention
- FIG. 4 shows, schematically, a fourth particular embodiment of the device of the invention
- FIG. 5 shows, schematically, a first particular embodiment of a free piston implemented in different embodiments of the device of the invention
- - Figure 6 shows, schematically, a first phase of operation of a free piston with through opening
- FIG. 7 shows, schematically, a second operating phase of a free piston with through opening
- FIG. 8 shows, schematically, a third operating phase of a free piston with through opening
- FIG. 9 shows, schematically, a fourth operating phase of a free piston with through opening.
- the device of the invention preferably implements, in order to use the expansion energy of one fluid to compress a second, a free-piston pneumatic booster.
- a free piston which is shown in Figures 1 to 9. It is recalled that, in a free piston booster, the movement of the piston responds only to the pressure of the gas, without a connecting rod. operate where it holds.
- Those skilled in the art can easily replace this free piston with a pneumatic membrane booster, for example.
- the device 10 which is the subject of the invention makes it possible, by recovering the expansion energy of a gas, therefore without energy expenditure, to compress natural gas in order to supply a gas station.
- natural gas for vehicles CNG
- CNG compressed natural gas network
- Pb a gas network 13 at pressure Pb, where Pa> Pb.
- the gas from the upstream network 12 is taken by a first pipe 31 to an inlet 18 of an expansion chamber of a booster 30 with free piston 11. Once the gas has been expanded, it joins the downstream gas network 13 via a second pipe 32.
- a valve 15 for entering gas from the upstream network 12 via a third pipe 33, in a compression chamber 23 of the booster 30 and a gas outlet valve 16 in a fourth pipe 34 the gas is compressed to a pressure Pc greater than Pa.
- the compressed gas is injected into the tank 14 of a CNG station or a CNG network.
- Two embodiments of the free piston booster 30 are described with reference to FIGS. 5, on the one hand, and 6 to 9, on the other hand.
- elements are added to automate the operation of the device 40 of the invention.
- a heat exchanger 41 positioned on both the first pipe 31 and on the fourth pipe 34 is configured to heat the gas passing through the first pipe 31 and to cool the compressed gaseous fluid passing through the fourth pipe 34.
- a pressure regulator 47 on the fourth line, upstream of the reservoir 44 is used so that the pressure and the temperature at the exchanger 41 are constant.
- a valve 45 controlled by a pressure switch 46 and positioned on the first pipe 31 stops the operation of the device 40 when the tank 44 of the CNG station is sufficiently filled, that is to say that its internal pressure is equal to a limit value superior. Once the pressure of the tank 44 of the CNG station reaches a lower limit value, for example following consumption by a customer of the station, the pressure switch 46 commands the opening of the valve 45, which restarts the operation of the device 40.
- valve 45 the assembly consisting of the valve 45 and the pressure switch 46 can be replaced by a mechanical device, the valve 45 then being replaced by an all-or-nothing pressure regulator positioned on the first pipe 31, including the impulse line is placed on the reservoir 44.
- the output flow rate on the second pipe 32 of the device 40 is constant during its operation due to the fact that the pneumatic booster has a free piston.
- a downstream pressure regulator 48 is used to regulate the pressure of the downstream network 13 during variations in customer consumption on the downstream network 13.
- valve 45 the assembly consisting of the valve 45 and the pressure switch 49 can be replaced by a mechanical device, the valve 45 then being replaced by a all-or-nothing pressure regulator whose impulse line is placed on the downstream network 13.
- this replacement can be carried out cumulatively with the replacement of the pressure switch 46 mentioned above.
- two direct-acting regulators placed in series are used, each of these regulators having a specific set point.
- a single pressure regulator is used with action piloted by two pilots placed in series, each of these pilots having a different set point.
- the device 50 and 60 makes it possible, without expenditure of energy, to compress any fluid, for example air to supply a compressed air network, which can be compressed.
- a compressed air network which can be compressed.
- a reservoir near a gas network 12 at pressure Pa and a gas network 13 at pressure Pb, where Pa> Pb.
- the elements illustrated in FIG. 1 are found, with the exception of the gas inlet valve 15 in the compression chamber 23, which is connected, by the third pipe 33, to a gas tank 51 to be compressed or to an ambient air inlet (not shown).
- the reservoir 14 can, for its part, be replaced by a gas or compressed air network.
- FIG. 5 represents a booster, that is to say a pair of pressure reducing valve 70, on the left, and compressor 72, on the right, with free piston.
- the regulator 70 comprises a chamber 75 provided with a high pressure gas inlet coming from the first pipe 31 and a low pressure gas outlet in the second pipe 32.
- an expansion piston 74 is brought into operation. Movement by the pressure of the gas and transmits this pressure, via a shaft 76 to a compression piston 77 which compresses the fluid in a chamber 78.
- the set of pistons 74 and 77 and of the shaft 76 constitutes a free piston.
- Valves 15 and 16 provide the seal and the direction of movement of the fluid from the third line 33 for entering gaseous fluid at low pressure to the fourth line 34 for the outlet of high pressure fluid.
- the system for controlling the entry of gas into the chamber 75 and the outlet of gas from the chamber 75 is not described here, being well known to those skilled in the art.
- a free piston is moved in a first chamber 75 by the gas and compresses the fluid in a second chamber 78.
- the compressor is driven by the turbine with very limited mechanical losses, which increases the efficiency of the compressor. relaxation station. It should be noted that the pressure of the fluid at the outlet of the compressor can be higher than the pressure of the gas at the inlet of the expansion station, depending on the ratio of the surfaces of the pistons 74 and 77.
- the free piston is replaced by membranes, as in membrane blowers of known type.
- a free piston booster 11 In the embodiment illustrated in FIGS. 6 to 10, a free piston booster 11.
- the arrows in broken lines represent the movements of gas.
- the arrow in solid lines represents the movements of the free piston.
- the free piston 11 comprises an expansion head 20 and a compression head 22 connected by a shaft.
- a through opening 24 opens on the one hand into the expansion head 20 on the side opposite the compression head 22 and, on the other hand, into a side wall of the shaft.
- the first gas line 31 opens into part 21 of the expansion chamber 17 opposite the shaft.
- the outlet of the expansion chamber 17 to which the second pipe 32 is connected is located on a side face of the expansion chamber 17 and is not obstructed by the expansion head 20 when the through opening 24 does not open. in the part 21 of the expansion chamber 17. More particularly, the outlet of the expansion chamber is obstructed by the expansion head except in the position of the free piston where the free volume of the compression chamber is minimal.
- the free volume of the compression chamber is intermediate between its extreme values.
- the pressure in the part 17 of the expansion chamber opposite to the compression chamber 23 is at the value Pb of the downstream network 13.
- the gas coming from the first pipe 31 enters the intermediate part 21 of the pressure chamber. expansion, at a pressure Pa.
- the pressure ratio Pa / Pb is greater than the ratio of the areas of the expansion head 20 in part 17 and in part 21.
- the free piston 11 therefore moves to the left, as illustrated in Figure 7. This movement of the free piston 11 causes the suction of gaseous fluid from the third pipe 33 through the inlet valve 15.
- the through opening 24 opens.
- this free piston booster 11 operates without an external moving part and as long as there is a sufficient pressure difference between the first pipe and the second pipe.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Separation Of Gases By Adsorption (AREA)
- Compressor (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1915178A FR3105343B1 (fr) | 2019-12-20 | 2019-12-20 | Dispositif de compression de gaz |
PCT/EP2020/087340 WO2021123393A1 (fr) | 2019-12-20 | 2020-12-18 | Dispositif de compression de gaz |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4078015A1 true EP4078015A1 (fr) | 2022-10-26 |
EP4078015B1 EP4078015B1 (fr) | 2024-08-14 |
Family
ID=70008774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20830235.6A Active EP4078015B1 (fr) | 2019-12-20 | 2020-12-18 | Dispositif de compression de gaz |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4078015B1 (fr) |
FR (1) | FR3105343B1 (fr) |
WO (1) | WO2021123393A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3125578B1 (fr) * | 2021-07-26 | 2024-04-19 | Grtgaz | Dispositif de décompression d’un contenant de gaz |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4350019A (en) * | 1980-12-22 | 1982-09-21 | W. R. Grace & Co. | Gas expansion/compression train |
DE9215695U1 (de) * | 1992-11-18 | 1993-10-14 | Anton Piller GmbH & Co KG, 37520 Osterode | Erdgas-Expansionsanlage |
DE4416359C2 (de) * | 1994-05-09 | 1998-10-08 | Martin Prof Dr Ing Dehli | Mehrstufige Hochtemperatur-Gas-Expansionsanlage in einem Gasleitungssystem mit nutzbarem Druckgefälle |
US7272932B2 (en) * | 2002-12-09 | 2007-09-25 | Dresser, Inc. | System and method of use of expansion engine to increase overall fuel efficiency |
PT2264288E (pt) * | 2009-06-11 | 2011-11-21 | Thermonetics Ltd | Sistema para uma despressurização de fluído eficiente |
FR3082597B1 (fr) * | 2018-06-15 | 2020-11-27 | Grtgaz | Installation de rebours a optimisation energetique |
-
2019
- 2019-12-20 FR FR1915178A patent/FR3105343B1/fr active Active
-
2020
- 2020-12-18 WO PCT/EP2020/087340 patent/WO2021123393A1/fr unknown
- 2020-12-18 EP EP20830235.6A patent/EP4078015B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
FR3105343A1 (fr) | 2021-06-25 |
WO2021123393A1 (fr) | 2021-06-24 |
EP4078015B1 (fr) | 2024-08-14 |
FR3105343B1 (fr) | 2021-11-19 |
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