US20110214839A1 - Method to increase gas mass flow injection rates to gas storage caverns using lng - Google Patents

Method to increase gas mass flow injection rates to gas storage caverns using lng Download PDF

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US20110214839A1
US20110214839A1 US13/128,603 US200813128603A US2011214839A1 US 20110214839 A1 US20110214839 A1 US 20110214839A1 US 200813128603 A US200813128603 A US 200813128603A US 2011214839 A1 US2011214839 A1 US 2011214839A1
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gas
lng
natural gas
compressor
flow line
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US13/128,603
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Jose Lourenco
MacKenzie Millar
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1304342 Alberta Ltd
1304338 Alberta Ltd
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Jose Lourenco
Millar Mackenzie
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Assigned to 1304342 ALBERTA LTD reassignment 1304342 ALBERTA LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MILLAR, MACKENZIE
Assigned to 1304338 ALBERTA LTD reassignment 1304338 ALBERTA LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOURENCO, JOSE
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    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0339—Heat exchange with the fluid by cooling using the same fluid
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/0395—Localisation of heat exchange separate using a submerged heat exchanger
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0486—Indicating or measuring characterised by the location
    • F17C2250/0491—Parameters measured at or inside the vessel
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0636—Flow or movement of content
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/023—Avoiding overheating
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/025—Reducing transfer time
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0142—Applications for fluid transport or storage placed underground
    • F17C2270/0144—Type of cavity
    • F17C2270/0149—Type of cavity by digging cavities
    • F17C2270/0152—Salt caverns

Definitions

  • the present invention relates to a method of increasing gas mass flow injection rates to gas storage caverns using LNG.
  • Natural gas is traditionally stored in a gaseous form in large volume salt caverns and aquifers to meet peak demand and ensure a secure supply.
  • the gas is added to storage by compression, resulting in an increment in cavern temperature and an increment in cavern pressure. These increments in pressure and temperature in the cavern decrease the rate at which gas can be added to the cavern.
  • a method to increase gas mass flow injection rates to a gas storage cavern includes using liquid natural gas (LNG) to cool natural gas in a natural gas flow line upstream of a compressor used to compress gas for storage in to a gas storage cavern.
  • LNG liquid natural gas
  • FIG. 1 is a schematic diagram that depicts an embodiment of the teachings contained herein.
  • FIG. 2 is a variation on the embodiment shown in FIG. 1 .
  • Gas is supplied from main pipeline stream 1 .
  • the gas to storage is routed through line 2 to exchanger 30 where it is cooled by LNG.
  • the cooler gas exits exchanger 30 via stream 3 to knock out drum 31 , to remove any condensate and debris present in the stream.
  • the condensate is removed through stream 4 .
  • the cold gas is routed through stream 5 to compressor 32 for injection into cavern 33 via stream 6 .
  • LNG is supplied from tank 35 and is routed through line 8 to pump 36 where it is pressurized and routed through line 9 .
  • the LNG is routed through line 10 to exchanger 30 , to cool the gas to storage and exits the exchanger through line 11 .
  • the gas in stream 11 is colder than compressed gas in stream 6 .
  • the gas can then be routed through valve 39 and line 12 to mix directly with stream 6 in mixer 41 , increasing the gas density of gas stream 7 to storage 33 .
  • the option of routing stream 11 through valve 38 and line 13 directly to storage cavern 33 is available.
  • the operating conditions for the cavern are monitored by pressure and temperature sensors 34 .
  • the objective is to increase the gas injection rate of compressor 32 by lowering the temperature of the gas suction line to the compressor, making the gas denser, thus increasing the mass flow rate and also decreasing the compressor outlet temperature.
  • the compressor outlet temperature can be further decreased by direct mixing of stream 12 with stream 6 . For every incremental decrease in the temperature of gas entering cavern 33 , the amount of gas cavern 33 is capable of storing increases. If it is desirable to further decrease the temperature of cavern 33 , the option of routing stream 11 through valve 38 and line 13 directly to storage cavern 33 is followed.
  • Gas is supplied from main pipeline stream 1 .
  • the gas to storage is routed through line 2 to exchanger 30 where it is cooled by LNG.
  • the cooler gas exits exchanger 30 via stream 3 to knock out drum 31 to remove any condensate and debris present in the stream.
  • the condensate is removed through stream 4 .
  • the cold gas is routed through stream 5 to compressor 32 , where it is compressed and delivered through line 6 to exchanger 41 where it is cooled.
  • the compressed and cooled stream 7 mixes with stream 11 and is stored through line 12 into gas cavern storage 33 .
  • LNG is supplied from tank 35 and is routed through line 8 to pump 36 where it is pressurized and routed through line 9 .
  • the LNG is routed to exchanger 30 , to cool the gas to storage and exits the exchanger through line 10 .
  • the gas in stream 10 is colder than compressed gas in stream 6 .
  • the gas stream 10 enters exchanger 41 to cool the compressor discharge gas.
  • the gas can then be routed through valve 39 to mix directly with stream 7 to storage 33 through line 12 .
  • the option of routing stream 11 through valve 38 and line 13 directly to storage cavern 33 is available.
  • the operating conditions for the cavern are monitored by pressure and temperature sensors 34 .
  • the objective is to increase the gas mass flow injection rate of compressor 32 by lowering the temperature of the gas suction line to the compressor, making the gas denser, thus increasing the mass flow rate whilst also decreasing the compressor outlet temperature.
  • the compressor outlet temperature is further decreased by indirect mixing of stream 10 with stream 6 thus further improving the power requirements for compression.
  • the described embodiment of FIG. 3 provides the ability for gas cavern operators to increase the mass flow gas injection rates to cavern storage.
  • the stored gas exits the cavern via stream 50 to meet demand.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A method to increase gas mass flow loading rates to a gas storage cavern includes using liquid natural gas (LNG) to cool natural gas in a natural gas flow line upstream of a compressor used to compress gas for storage in to a gas storage cavern.

Description

    FIELD
  • The present invention relates to a method of increasing gas mass flow injection rates to gas storage caverns using LNG.
    • BACKGROUND
  • Natural gas is traditionally stored in a gaseous form in large volume salt caverns and aquifers to meet peak demand and ensure a secure supply. The gas is added to storage by compression, resulting in an increment in cavern temperature and an increment in cavern pressure. These increments in pressure and temperature in the cavern decrease the rate at which gas can be added to the cavern.
    • SUMMARY
  • A method to increase gas mass flow injection rates to a gas storage cavern, includes using liquid natural gas (LNG) to cool natural gas in a natural gas flow line upstream of a compressor used to compress gas for storage in to a gas storage cavern.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
  • FIG. 1 is a schematic diagram that depicts an embodiment of the teachings contained herein.
  • FIG. 2 is a variation on the embodiment shown in FIG. 1.
    •  DETAILED DESCRIPTION
  • The preferred method to increase mass flow gas injection rates will now be described with reference to FIG. 1.
  • Gas is supplied from main pipeline stream 1. The gas to storage is routed through line 2 to exchanger 30 where it is cooled by LNG. The cooler gas exits exchanger 30 via stream 3 to knock out drum 31, to remove any condensate and debris present in the stream. The condensate is removed through stream 4. The cold gas is routed through stream 5 to compressor 32 for injection into cavern 33 via stream 6. LNG is supplied from tank 35 and is routed through line 8 to pump 36 where it is pressurized and routed through line 9. The LNG is routed through line 10 to exchanger 30, to cool the gas to storage and exits the exchanger through line 11. The gas in stream 11 is colder than compressed gas in stream 6. The gas can then be routed through valve 39 and line 12 to mix directly with stream 6 in mixer 41, increasing the gas density of gas stream 7 to storage 33. The option of routing stream 11 through valve 38 and line 13 directly to storage cavern 33 is available. The operating conditions for the cavern are monitored by pressure and temperature sensors 34. The objective is to increase the gas injection rate of compressor 32 by lowering the temperature of the gas suction line to the compressor, making the gas denser, thus increasing the mass flow rate and also decreasing the compressor outlet temperature. The compressor outlet temperature can be further decreased by direct mixing of stream 12 with stream 6. For every incremental decrease in the temperature of gas entering cavern 33, the amount of gas cavern 33 is capable of storing increases. If it is desirable to further decrease the temperature of cavern 33, the option of routing stream 11 through valve 38 and line 13 directly to storage cavern 33 is followed.
  • A variation will now be described with reference to FIG. 2.
  • Gas is supplied from main pipeline stream 1. The gas to storage is routed through line 2 to exchanger 30 where it is cooled by LNG. The cooler gas exits exchanger 30 via stream 3 to knock out drum 31 to remove any condensate and debris present in the stream. The condensate is removed through stream 4. The cold gas is routed through stream 5 to compressor 32, where it is compressed and delivered through line 6 to exchanger 41 where it is cooled. The compressed and cooled stream 7 mixes with stream 11 and is stored through line 12 into gas cavern storage 33. LNG is supplied from tank 35 and is routed through line 8 to pump 36 where it is pressurized and routed through line 9. The LNG is routed to exchanger 30, to cool the gas to storage and exits the exchanger through line 10. The gas in stream 10 is colder than compressed gas in stream 6. The gas stream 10 enters exchanger 41 to cool the compressor discharge gas. The gas can then be routed through valve 39 to mix directly with stream 7 to storage 33 through line 12. The option of routing stream 11 through valve 38 and line 13 directly to storage cavern 33 is available. The operating conditions for the cavern are monitored by pressure and temperature sensors 34. The objective is to increase the gas mass flow injection rate of compressor 32 by lowering the temperature of the gas suction line to the compressor, making the gas denser, thus increasing the mass flow rate whilst also decreasing the compressor outlet temperature. The compressor outlet temperature is further decreased by indirect mixing of stream 10 with stream 6 thus further improving the power requirements for compression. The described embodiment of FIG. 3 provides the ability for gas cavern operators to increase the mass flow gas injection rates to cavern storage.
  • The stored gas exits the cavern via stream 50 to meet demand.
  • In this patent document, the word “comprising” is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article “a” does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
  • It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiments without departing from scope of the Claims.

Claims (10)

1. A method to increase gas mass flow injection rates to a gas storage cavern, comprising:
using liquid natural gas (LNG) to cool natural gas in a natural gas flow line upstream of a compressor used to compress gas for storage in to a gas storage cavern.
2. The method of claim 1, including a step of effecting a heat exchange between the natural gas in the gas flow line upstream of the compressor and LNG passing through a heat exchanger.
3. The method of claim 1, including a step of using LNG to cool natural gas in the natural gas flow line downstream of a compressor prior to the compressed natural gas entering the gas storage cavern.
4. The method of claim 3, including a step of injecting LNG into the natural gas flow line downstream of the compressor.
5. The method of claim 3, including a step of effecting a heat exchange between the natural gas in the gas flow line downstream of the compressor and LNG passing through a heat exchanger.
6. The method of claim 1, including a step of performing direct injection of LNG into the gas storage cavern.
7. The method of claim 4, including a step of monitoring a temperature of the gas storage cavern and controlling the injection of LNG into the natural gas flow line downstream of the compressor based upon the temperature of the gas storage cavern.
8. A method to increase gas mass flow injection rates to a gas storage cavern, comprising:
effecting a heat exchange between the natural gas in a natural gas flow line upstream of a compressor used to compress gas for storage in to a gas storage cavern and liquid natural gas (LNG) passing through an upstream heat exchanger to cool natural gas in the natural gas flow line upstream of a compressor used to compress gas for storage in to a gas storage cavern; and
injecting LNG that has passed through the upstream heat exchanger into one of the natural gas flow line downstream of the compressor or into the gas storage cavern.
9. The method of claim 8, including a step of effecting a heat exchange between the natural gas in the gas flow line downstream of the compressor and LNG passing through a downstream heat exchanger.
10. The method of claim 8, including a step of monitoring a temperature of the gas storage cavern and performing injection of LNG into one of the natural gas storage flow line downstream of the compressor or the gas storage cavern, as required to maintain the gas storage cavern at a preselected temperature.
US13/128,603 2008-11-10 2008-11-10 Method to increase gas mass flow injection rates to gas storage caverns using lng Abandoned US20110214839A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102392935A (en) * 2011-10-27 2012-03-28 中国寰球工程公司 Liquefied natural gas loading system and method

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CN102506298B (en) * 2011-09-30 2013-11-06 中国寰球工程公司 Cold-circulating system and method for liquefied natural gas loading system

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