WO2012091933A1 - Use of refrigeration loops to chill inlet air to gas turbine - Google Patents
Use of refrigeration loops to chill inlet air to gas turbine Download PDFInfo
- Publication number
- WO2012091933A1 WO2012091933A1 PCT/US2011/065067 US2011065067W WO2012091933A1 WO 2012091933 A1 WO2012091933 A1 WO 2012091933A1 US 2011065067 W US2011065067 W US 2011065067W WO 2012091933 A1 WO2012091933 A1 WO 2012091933A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- refrigerant
- inlet air
- refrigeration
- gas turbine
- Prior art date
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 114
- 239000003507 refrigerant Substances 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims abstract description 9
- 235000013305 food Nutrition 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 104
- 239000007789 gas Substances 0.000 claims description 99
- 239000003949 liquefied natural gas Substances 0.000 claims description 94
- 239000003345 natural gas Substances 0.000 claims description 48
- 239000013529 heat transfer fluid Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 29
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000001294 propane Substances 0.000 claims description 6
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 3
- ZJCFOZHHYJVNNP-UHFFFAOYSA-N F[C]Br Chemical compound F[C]Br ZJCFOZHHYJVNNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- 239000003570 air Substances 0.000 description 59
- 239000012080 ambient air Substances 0.000 description 7
- 239000000356 contaminant Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000003651 drinking water Substances 0.000 description 4
- 235000020188 drinking water Nutrition 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 4
- 239000003621 irrigation water Substances 0.000 description 4
- 230000001932 seasonal effect Effects 0.000 description 4
- 230000008016 vaporization Effects 0.000 description 4
- 238000009834 vaporization Methods 0.000 description 4
- WTPUKBUYGDXTOF-UHFFFAOYSA-N F[C](Cl)Br Chemical compound F[C](Cl)Br WTPUKBUYGDXTOF-UHFFFAOYSA-N 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 150000001768 cations Chemical group 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 235000002568 Capsicum frutescens Nutrition 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/005—Adaptations for refrigeration plants
-
- 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
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
-
- 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
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
- F02C7/143—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid before or between the compressor stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
- F25J1/008—Hydrocarbons
- F25J1/0082—Methane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
- F25J1/008—Hydrocarbons
- F25J1/0085—Ethane; Ethylene
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
- F25J1/008—Hydrocarbons
- F25J1/0087—Propane; Propylene
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
- F25J1/008—Hydrocarbons
- F25J1/0092—Mixtures of hydrocarbons comprising possibly also minor amounts of nitrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
- F25J1/0097—Others, e.g. F-, Cl-, HF-, HClF-, HCl-hydrocarbons etc. or mixtures thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
- F25J1/0235—Heat exchange integration
- F25J1/0236—Heat exchange integration providing refrigeration for different processes treating not the same feed stream
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0281—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc. characterised by the type of prime driver, e.g. hot gas expander
- F25J1/0283—Gas turbine as the prime mechanical driver
Definitions
- the present application relates to a method and system which maximizes gas turbine output for a refrigerant loop.
- the method consumes a small amount of refrigerant and utilizes the refrigeration to chill the inlet air to the gas turbine (GT) machines used in the refrigeration system.
- GT gas turbine
- This approach enhances the gas turbine power output and efficiency which, in turn, increases the production of the plant.
- the gain in efficiency in production can compensate for the consumption of refrigerant.
- Gas turbines are commonly used for driving compressors in refrigeration systems.
- gas turbines are used in to drive refrigeration compressors in LNG production, air separation, food storage and ice making.
- Gas turbines are constant volume machines and their output depends on the mass flow of air through the turbine. Over the years various technologies have been developed to increase the amount of useful power that gas turbines are able to produce.
- One way of increasing the power output of a gas turbine is to cool the turbine inlet air prior to compressing it in the compressor. Cooling inlet air increases the air mass flow through the turbine, increasing turbine output and reducing heat rate. Cooling the inlet air also increases the turbine's efficiency.
- a method and system for maximizing gas turbine output for a refrigeration loop are provided.
- the method and system provide a gain in energy efficiency of the gas turbine while compensating for an amount of energy required for consuming a portion of refrigerant.
- the system comprises (a) a refrigeration system comprising a refrigeration loop for air- chilling; (b) a gas turbine for driving a compressor for the refrigeration system; (c) a heat exchanger for consuming a portion of refrigerant from the refrigeration system and cooling a heal transfer fluid; and (d) a second heat exchanger for reducing the temperature of inlet air entering the gas turbine with the heat transfer fluid.
- an integrated method of maximizing gas turbine output for a refrigeration loop comprises (a) operating a refrigeration loop for chilling processes; (b) operating a gas turbine to drive a compressor for a the refrigeration loop; (c) gasifying a portion of refrigerant from the refrigeration system; and (d) reducing the temperature of inlet air entering tire gas turbines by exchanging heat with the gasified portion of refrigerant either directly or indirectly.
- an integrated method of operating a gas turbine used in a refrigeration loop comprises (a) operating a gas turbine to drive a compressor for a refrigeration system comprising a refrigeration loop and (b) chilling inlet air entering the gas turbine by (i) exchanging heat with a refrigerant in the refrigeration loop; or (ii) cooling a heat transfer fluid with a refrigerant in the refrigeration loop, and chilling inlet air entering the gas turbine by exchanging heat with the heat transfer fluid; or both (i) and (ii).
- the refrigerant in the refrigeration loop comprises methane, ethane, propane, ammonia, a liydrofluorocarboii, a chlorofSuorocarbon, a hydrochlorofluoroearbon, a bromofluorocarbon, a
- the gas turbine and refrigeration system can be used to produce LNG and the method further comprises cooling and condensing a natural gas stream by reducing the temperature of the natural gas using the refrigeration system.
- LNG integrated liquefied natural gas
- the system comprises (a) an inlet stream comprising natural gas; (b) a refrigeration system for reducing the temperature of the natural gas and condensing the natural gas to produce LNG; (c) a gas turbine for driving a compressor for the refrigeration system; (d) a first vaporization heat exchanger for regasifying a portion of the LNG and cooling a heat transfer fluid; (e) a second vaporization heat exchanger for consuming a portion of refrigerant from the refrigeration system and cooling the heat transfer fluid; and (f) a third heat exchanger for reducing the temperature of inlet air entering the gas turbine with the heat transfer fluid.
- the integrated system can further comprise an outlet pipeline for supplying the regasified portion of the LNG to the domestic gas market.
- a further embodiment discloses herein is an integrated method for operating a liquefied natural gas (LNG) plant, the method comprising: (i) cooling and condensing a natural gas stream in a refrigeration system to produce liquefied natural gas (LNG); (ii) operating a gas turbine to drive a compressor for the refrigeration system; (iii) regasifying a portion of the LNG; (iv) consuming a portion of the refrigerant from the refrigeration system; and (iv) reducing the temperature of inlet air entering the gas turbine by exchanging heat with the regasified portion of the LNG and with the consumed portion of the refrigerant directly or indirectly.
- LNG liquefied natural gas
- Figure 1 illustrates an embodiment of the proposed refrigeration loop.
- Figure 2 is a graph showing the monthly temperature variations at three locations for LNG and domestic natural gas production.
- a portion of refrigerant from the refrigeration system is utilized to cool the inlet air to the gas turbines in the refrigeration system, either directly or indirectly.
- LNG is liquefied natural gas. Natural gas from the well can consist of various hydrocarbons and contaminants; natural gas for the domestic market is comprised primarily of methane. At ambient temperature and pressure, LNG exists as a gas, but it can be cooled and/or pressurized to provide a liquid, which facilitates storage and transportation.
- Remote location or market means a location that is not readily accessible or economically feasible to access by pipeline.
- a remote location or market can be at least over a thousand miles away from the natural gas source and/or is separated in geography such that it is not accessible by pipeline, for example, separated by oceans or other large, deep bodies of water.
- “Local market” means a location that is within a distance and geography from the natural gas source so that the natural gas may be supplied as a gas by pipeline.
- local markets can be at any distance within several thousand miles from the natural gas source and is accessible by pipeline.
- indirect in the context of heat exchange means that the heat exchange between the refrigerant and the inlet air involves an intermediate heat transfer fluid. Accordingly, the temperature of inlet air entering the gas turbine is reduced by exchanging heat with the refrigerant through a heal transfer fluid system.
- Integrated means that the steps or units of the system or interconnected so that when operating together greater efficiencies are realized in comparison to when operating independently.
- hydrocarbon means a compound containing carbon, hydrogen, and fluorine.
- chlorofluorocarbon means a compound containing carbon, hydrogen, fluorine, and chlorine.
- a "bromofluorocarbon” means a compound containing carbon, hydrogen, fluorine, and bromine.
- a bromochlorofluorcarbon means a compound containing carbon, hydrogen, fluorine, bromine, and chlorine.
- substantially all means at least 90 % and up to 100 %.
- Refrigeration systems utilize one or more gas turbines to drive the refrigeration compressors. Power generators are also driven by gas turbines in refrigeration systems. The combined output and efficiency of all gas turbines determines the total capacity of the refrigeration system. Refrigeration systems driven by one or more gas turbines are utilized in LNG production, air separation, food storage, and ice- making,
- LNG plants utilize one or more gas turbines to drive the refrigeration compressors required to liquefy the natural gas and power generators are also driven by gas turbines in the LNG plants.
- gas turbines In LNG plants, a portion of the natural gas collected may also be utilized as a fuel for power generation for the LNG plant, including for the gas turbines. The combined output and efficiency of all gas turbines determines the total capacity of the LNG plant.
- the present application provides a method and a system which maximizes refrigeration systems driven by gas turbines in all seasons.
- substantially a small portion of refrigerant from the refrigeration system is consumed and the cooling from this process is used to reduce the temperature of inlet air entering gas turbines of the refrigeration system.
- the portion of refrigerant utilized for cooling the inlet air may be recycled to the refrigeration system.
- One embodiment of the present method and system relates to LNG production and the refrigeration facility is a LNG liquefaction plant.
- natural gas is produced from a field or well.
- the produced supply of natural gas is collected.
- the LNG liquefaction plant is utilized to process substantially all of the natural gas stream.
- the inlet air to the gas turbines can be chilled with a portion of refrigerant from the refrigeration system.
- the inlet air to the gas turbines can also be cooled with a portion of LNG, which is regasified.
- the effect of monthly temperature variation of the location on the capacity of the refrigeration facility is stabilized.
- the capacity of the refrigeration facility can be sensitive to environmental temperature variation.
- the capacity of the refrigeration facility is determined by the total output of the gas turbine machines in the refrigeration system and it is challenging to maintain the power output at a stable and maximum level.
- the refrigeration system comprises a refrigeration loop.
- the refrigeration system can comprise a single stage or multi stage refrigeration loop.
- the multistage refrigeration loop can be a two stage, three stage or four stage loop.
- the refrigeration system comprises a two or three stage refrigeration loop.
- the consumed portion of refrigerant can come from the first stage of the refrigeration loop.
- the refrigerant used in the refrigeration system can be any suitable refrigerant.
- suitable refrigerants include methane, ethane, propane, ammonia, a hydrofluoroearbon, a chlorofluoroearbon, a hydrochlorofluorocarhon, a
- bromofluorocarbon a bromochlorofluorcarbon, or any combination thereof.
- the heat transfer can be indirect and involve the use of a heat transfer fluid. Any suitable heat transfer fluids can be used. Suitable heat transfer fluids include methanol, ethanol, a glycol and water mixture, or any combination thereof.
- the refrigerant is propane and the heat transfer fluid is methanol.
- the heat transfer can be either direct or indirect.
- the inlet air entering the gas turbine can be chilled by exchanging heat with a refrigerant in the refrigeration loop.
- the inlet air can be chilled by exchanging heat with a heat transfer fluid, which has been cooled by exchanging heat with a refrigerant in the refrigeration loop.
- the inlet air can also be chilled by both.
- fire temperature of the inlet air entering tire gas turbines can be reduced by 10 to 40 °F from the ambient temperature of the refrigeration system. In an embodiment, the temperature of the inlet air entering the gas turbines can be reduced by at least 20 °F from the ambient temperature. In another embodiment, the temperature of the inlet air entering the gas turbines can be reduced to a temperature in a range of from about 40 to 55 °F or 45 to 55 °F. In an additional embodiment, the temperature of the inlet air entering the gas turbine can be reduced from an ambient temperature in a range of from about 60 to about 120 °F to a temperature in a range of from about 45 to about 55 °F. In a further embodiment, the temperature of the inlet air entering the gas turbine can be reduced from an ambient temperature in a range of from about 80 to about 120 °F to a temperature in a range of from about 42 to about 60 °F.
- the efficiency of the gas turbines is increased by at least 3 %.
- the efficiency may be increased by at least 3 % by reducing the temperature of the inlet air from an ambient temperature of 90°F to a temperature of 50°F.
- FIG. 1 is a graph showing the monthly temperature variations at three locations. The portion of the refrigerant to be consumed is utilized to control the inlet air temperature and maintain the power ouipot at a steady, maximum level. Therefore, facilities for refrigeration, including facilities for LNG production, can be built at a variety of locations without concern that the ambient air temperatures will affect the efficiency. During cold seasons or climates, the air conditioning requirement provided by the consumed refrigerant is reduced.
- the gain in gas turbine output and efficiency can compensate for cost for the additional refrigerant that is consumed.
- the gain may be measured over fee seasonal variations for climates with cold seasons and the additional production during colder seasons can be used to compensate for the additional energy required for initial refrigeration during warmer seasons.
- a reirigeration system is provided for air-chilling.
- the reirigeration system comprises a two stage refrigeration loop.
- a gas turbine drives a compressor for the refrigeration system.
- a portion of refrigerant is consumed and used for cooling the inlet air entering the gas turbine of the refrigeration system.
- the refrigerant can cool the inlet air either directly or indirectly through the use of an intermediate heat transfer fluid.
- a heat exchanger transfers heat from the portion of refrigerant to be consumed and cools an intermediate heat transfer fluid.
- a second heat transfer exchanger exchanges heat from the intermediate heat transfer fluid and reduces the temperature of inlet air entering the gas turbine.
- the second heat exchanger can comprise a cooling coil at an inlet of the gas turbine.
- the portion of refrigerant to be consumed is withdrawn from the first reirigeration loop.
- the portion of refrigerant to be cons umed can be in a range of from 5 to 25% by weight of the total refrigerant.
- fee portion of refrigeran t to be consumed can be in a range of from about 10 to 25% by weight of the total refrigerant.
- the refrigerant prior to reducing the temperature of the inlet air can be at a temperature of about -45 to about 45°F. In another embodiment, the refrigerant prior to reducing fee temperature of the inlet air can be at a temperature of about -45 to about
- the temperature of the heat transfer fluid prior to reducing the temperature of the inlet air can be at a temperature of about -45 to about 30°F.
- the temperature of the heat transfer fluid prior to reducing the temperature of fee inlet air can be at a temperature of about -45 to about 0°F.
- the temperature of the refrigerant in the second loop can be in the range of about -100 to about 0°F.
- the gas turbine of the refrigeration compressors condenses water vapor from the ambient air of the facility.
- the power generator for the facility may also condense water vapor from the ambient air.
- This condensed water is distilled quality water. Accordingly, the condensed water can be collected and used for other uses in the plant. For example, it can be used for wet compression, evaporative cooling, and/or fogging the inlet air to the gas turbines.
- the water can be used as plant process water such as hydrogen sulfide removal by passing natural gas through water or amine based solution.
- the water can be used for compressor circulation cooling and inlet humidity adjustment.
- distilled quality water Because it is distilled quality water, it can also be used for any use for which distilled water may be needed in the area of the plant. For example, it can be used as a source for drinking water or irrigation water as well. A source for drinking water or irrigation water may be particularly useful in desert locations.
- the gas turbine according to the methods and systems described herein can be used to drive a compressor in the refrigeration system.
- the gas turbine can also be used to drive a steam generator or can be configured to generate electricity.
- Refrigeration systems driven by the one or more gas turbines can be utilized in LNG production, air separation, food storage, and ice-making.
- the presently claimed integrated refrigeration system and method can be used in a liquefied natural gas system.
- the liquefied natural gas system can have addition integration for chilling the inlet air of the gas turbines.
- Such an integrated LNG system and method are described in U.S. Patent Application entitled “Method to Maximize LNG Plant Capacity", filed 30 December 2010, Attorney Docket No. 70205.0221US01, the contents of which are herein incorporated by reference in their entirety, in this integrated liquefied natural gas system, natural gas is produced from a field or well and the produced supply of natural gas is collected as an inlet stream.
- the inlet stream of natural gas is fed to a refrigeration system for reducing the temperature of the natural gas and condensing the natural gas to produce LNG (a liquefaction and refrigeration unit.
- the refrigeration system may be a single stage or multistage stage refrigeration loop.
- One or more gas turbines drive a compressor for the refrigeration system.
- the liquefied product is then sent to a storage tank. From the storage tank, LNG can be collected to ship or transport to a remote market.
- LN G is taken from the collection/storage tank for regasification.
- the portion of LNG is regasified in a regasifi cation unit.
- the portion of the LNG to be regasified can be in the range of from 5% to 25% by weight of the total LNG produced. In another embodiment, the portion of the LNG to be regasified can be in the range of from 10% to 20% by weight of the total LNG produced.
- the regasification unit can be a vaporization heat exchanger for regasifying the portion of the LNG and cooling a heat transfer fluid.
- the heat transfer fluid can comprise methanol, ethanol, propane, an ethylene glycol and water mixture or any combination thereof.
- the heat transfer fluid can also take additional heat or refrigeration from auxiliary sources.
- the heat transfer fluid takes additional refrigeration from the refrigeration loop comprising refrigerant.
- a second vaporization heat exchanger is present for consuming a portion of the refrigerant of the refrigeration loop and further cooling the heat transfer fluid.
- a third heat exchanger is utilized for reducing the temperature of inlet air entering the gas turbine with the heat transfer fluid.
- This heat exchanger can comprise a cooling coil at an inlet of the gas turbine.
- the portion of LNG to be regasified and the refrigerant to be consumed releases refrigeration and this is used to reduce the temperature of inlet air entering gas turbines of the refrigeration system in the LNG plant either directly or indirectly.
- the temperature of inlet air is reduced by exchanging heat either directly or indirectly with the regasified portion of the LNG and the refrigerant.
- the heat is exchanged indirectly through the use of an intermediate heat transfer fluid.
- LNG can be supplied to an outlet pipeline for supplying the regasified LNG to the domestic gas market.
- the regasified LNG can be supplied to a natural gas pipeline for domestic or local natural gas production.
- the natural gas stream for the local market has any contaminants removed by the LNG process. Therefore, a separate facility is not required to remove contaminants, such as sulfur and carbon dioxide, from the natural gas before providing it to the domestic energy market.
- the regasified portion of the LNG is not needed for domestic natural gas production, or it is not all needed, the regasified LNG, or a portion of the regasified LNG, can be recycled to the refrigeration system to provide LNG.
- the regasified LNG does not require an additional separate cleaning facility prior to use as domestic natural gas because it is cleaned sufficiently in the liquefaction process. Accordingly, the regasified portion of the LNG can be exported directly by pipeline for use in a local or domestic natural gas market. Because the regasified LNG has substantially all contaminants removed by the LNG process, the regasified LNG is cleaner than natural gas typically recovered for local or domestic market production. Natural gas recovered for local or domestic market production is processed to remove contaminants, such as sulfur and carbon dioxide, to meet pipeline specifications.
- the regasified LNG can also be used to blend with natural gas directly collected for domestic production to meet pipeline specifications.
- the natural gas can be processed less severely removing fewer contaminants so that the natural gas alone would not meet pipeline specifications. But the blend can meet pipeline specifications.
- the regasified LNG can be blended with natural gas, which has been not processed or has been processed less severely, and the blend meets pipeline specifications. For example, in cooler seasons it may be possible to blend high purity, regasified LNG with unprocessed or less processed natural gas and meet pipeline specifications for domestic gas production.
- the gas turbine of the refrigeration compressors condenses water vapor from the ambient air of the facility.
- the power generator for the LNG plant may also condense water vapor from the ambient air.
- This condensed water is distilled quality water. Accordingly, the condensed water can be collected and used for other uses in the plant. For example, it can be used for wet compression, evaporative cooling, and/or fogging the inlet air to the gas turbines.
- the water can be used as plant process water such as hydrogen sulfide removal by passing natural gas through water or amine based solution.
- the water can be used for compressor circulation cooling and inlet humidity adjustment. Because it is distilled quality water, it can also be used for any use for which distilled water may be needed in the area of the plant.
- a source for drinking water or irrigation water may be particularly useful in desert locations.
- integration is utilized to increase the gas turbine power output in the LNG plant and to provide a natural gas stream suitable for the domestic or local natural gas market.
- the gain in energy efficiency by reducing the temperature of the inlet air entering the gas turbines can compensate for the amount of energy required to produce the portion of LNG, which is later regasified and can compensate for the refrigerant that is consumed.
- a single liquefied natural gas plant is utilized to create natural gas for a local gas market and liquefied natural gas for transport to a remote market.
- the process comprises cooling and condensing a natural gas stream in a LNG facility comprising a refrigeration system to produce LNG.
- One or more gas turbines are used to operate compressors for the refrigeration system of the LNG plant.
- a portion of the LNG is taken to be regasified,
- a portion of the refrigerant from the refrigeration is system is consumed.
- the temperature of inlet air entering the gas turbines of the refrigeration system is reduced by exchanging heat with the portion of the LNG to be regasified and with the refrigerant to be consumed, either directly or indirectly .
- an intermediate heat transfer fluid is used to take refrigeration from the portion of the LNG to be regasified and from the consumed refrigerant and the intermediate heat transfer fluid is used to cool the inlet air.
- the LNG produced from the facility is shipped to remote markets and at least a portion of the regasified LNG can be supplied to an outlet pipeline for local gas markets.
- the improvement comprises consuming a portion of the refrigerant to cool inlet air to the gas turbines.
- the improvement further comprises converting substantially all of the produced natural gas stream from a well or field to LNG and then regasifying a portion.
- the regasifi cation process is also used to chill inlet air to gas turbines used in the refrigeration system of the LNG plant. This approach enhances the GT power output and efficiency which, in turn, increases the LNG production of the plant.
- the gain in efficiency in LNG production can compensate for the additional cost in energy and consumption of the refrigerant,
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1303959.9A GB2505539A (en) | 2010-12-30 | 2011-12-15 | Use of refrigeration loops to chill inlet air gas turbine |
CA2812605A CA2812605A1 (en) | 2010-12-30 | 2011-12-15 | Use of refrigeration loops to chill inlet air to gas turbine |
AU2011352950A AU2011352950B2 (en) | 2010-12-30 | 2011-12-15 | Use of refrigeration loops to chill inlet air to gas turbine |
ZA2013/01676A ZA201301676B (en) | 2010-12-30 | 2013-03-05 | Use of refrigeration loops to chill inlet air to gas turbine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/982,187 | 2010-12-30 | ||
US12/982,187 US20120167618A1 (en) | 2010-12-30 | 2010-12-30 | Use of refrigeration loops to chill inlet air to gas turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012091933A1 true WO2012091933A1 (en) | 2012-07-05 |
Family
ID=46379528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2011/065067 WO2012091933A1 (en) | 2010-12-30 | 2011-12-15 | Use of refrigeration loops to chill inlet air to gas turbine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20120167618A1 (en) |
AU (1) | AU2011352950B2 (en) |
CA (1) | CA2812605A1 (en) |
GB (1) | GB2505539A (en) |
WO (1) | WO2012091933A1 (en) |
ZA (1) | ZA201301676B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115217540A (en) * | 2021-04-19 | 2022-10-21 | 中国石油化工集团有限公司 | Power generation and refrigeration house ice-making cogeneration system for cascade coupling recovery of LNG cold energy |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2494400B (en) * | 2011-09-06 | 2017-11-22 | Highview Entpr Ltd | Method and apparatus for power storage |
ITCO20110073A1 (en) * | 2011-12-23 | 2013-06-24 | Nuovo Pignone Spa | SYSTEM INCLUDING A CONDENSED WATER RECOVERY DEVICE |
CN103557675B (en) * | 2013-10-30 | 2015-05-27 | 河南开元空分集团有限公司 | Cryogenic distillation liquidation system and method for synthesis ammonia chemical tail gas |
CN105222446B (en) * | 2015-10-10 | 2017-12-19 | 华电电力科学研究院 | Common ice and the apparatus and method of Ozone Ice are prepared using LNG cold energy using two-stage heat exchange |
JP6764020B2 (en) * | 2016-08-16 | 2020-09-30 | エクソンモービル アップストリーム リサーチ カンパニー | Systems and methods for liquefying natural gas using turbine inlet cooling |
CN114876641A (en) * | 2022-06-14 | 2022-08-09 | 西安热工研究院有限公司 | Gas turbine inlet air cooling system utilizing LNG gasification cold energy and working method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03236589A (en) * | 1990-02-13 | 1991-10-22 | Osaka Gas Co Ltd | Method and device for re-liquefying supply of natural gas |
JP2002530616A (en) * | 1998-11-18 | 2002-09-17 | シエル・インターナシヨネイル・リサーチ・マーチヤツピイ・ベー・ウイ | Natural gas liquefaction plant |
US20030005698A1 (en) * | 2001-05-30 | 2003-01-09 | Conoco Inc. | LNG regassification process and system |
JP2004211949A (en) * | 2002-12-27 | 2004-07-29 | Mayekawa Mfg Co Ltd | Method for utilizing cold and its device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4951460A (en) * | 1989-01-11 | 1990-08-28 | Stewart & Stevenson Services, Inc. | Apparatus and method for optimizing the air inlet temperature of gas turbines |
US6324867B1 (en) * | 1999-06-15 | 2001-12-04 | Exxonmobil Oil Corporation | Process and system for liquefying natural gas |
-
2010
- 2010-12-30 US US12/982,187 patent/US20120167618A1/en not_active Abandoned
-
2011
- 2011-12-15 GB GB1303959.9A patent/GB2505539A/en not_active Withdrawn
- 2011-12-15 AU AU2011352950A patent/AU2011352950B2/en not_active Ceased
- 2011-12-15 WO PCT/US2011/065067 patent/WO2012091933A1/en active Application Filing
- 2011-12-15 CA CA2812605A patent/CA2812605A1/en not_active Abandoned
-
2013
- 2013-03-05 ZA ZA2013/01676A patent/ZA201301676B/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03236589A (en) * | 1990-02-13 | 1991-10-22 | Osaka Gas Co Ltd | Method and device for re-liquefying supply of natural gas |
JP2002530616A (en) * | 1998-11-18 | 2002-09-17 | シエル・インターナシヨネイル・リサーチ・マーチヤツピイ・ベー・ウイ | Natural gas liquefaction plant |
US20030005698A1 (en) * | 2001-05-30 | 2003-01-09 | Conoco Inc. | LNG regassification process and system |
JP2004211949A (en) * | 2002-12-27 | 2004-07-29 | Mayekawa Mfg Co Ltd | Method for utilizing cold and its device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115217540A (en) * | 2021-04-19 | 2022-10-21 | 中国石油化工集团有限公司 | Power generation and refrigeration house ice-making cogeneration system for cascade coupling recovery of LNG cold energy |
Also Published As
Publication number | Publication date |
---|---|
GB201303959D0 (en) | 2013-04-17 |
US20120167618A1 (en) | 2012-07-05 |
AU2011352950B2 (en) | 2015-04-09 |
GB2505539A (en) | 2014-03-05 |
AU2011352950A1 (en) | 2013-03-21 |
ZA201301676B (en) | 2014-07-30 |
CA2812605A1 (en) | 2012-07-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2011352950B2 (en) | Use of refrigeration loops to chill inlet air to gas turbine | |
US7980081B2 (en) | Configurations and methods for LNG fueled power plants | |
US7574856B2 (en) | Configurations and methods for power generation with integrated LNG regasification | |
US20170038136A1 (en) | Method for the integration of a nitrogen liquefier and liquefaction of natural gas for the production of liquefied natural gas and liquid nitrogen | |
US10393431B2 (en) | Method for the integration of liquefied natural gas and syngas production | |
CN102428332B (en) | Method and apparatus for cooling a gaseous hydrocarbon stream | |
US20180038642A1 (en) | Process integration of a gas processing unit with liquefaction unit | |
AU785125B2 (en) | A method and a device for the liquefaction of natural gas | |
US20140260418A1 (en) | Method to Maximize LNG Plant Capacity in All Seasons | |
US8991208B2 (en) | Liquefaction process producing subcooled LNG | |
US20180038639A1 (en) | Robust recovery of natural gas letdown energy for small scale liquefied natural gas production | |
JP2004150685A (en) | Nitrogen producing equipment and turbine power generation equipment | |
JP4747001B2 (en) | Cold supply system | |
JP4879606B2 (en) | Cold supply system | |
AU2013203082B2 (en) | Method and system for utilising waste heat generated from the processing of natural gas to produce liquefied natural gas | |
CN112361208B (en) | Marine flash evaporation natural gas treatment device and method | |
US20090031755A1 (en) | Natural gas liquefaction process to extend lifetime of gas wells | |
US20100000254A1 (en) | Method of producing gas hydrate | |
CN104412055A (en) | Temperature controlled method to liquefy gas and a production plant using the method | |
US10330381B2 (en) | Plant for the liquefaction of nitrogen using the recovery of cold energy deriving from the evaporation of liquefied natural gas | |
JPS6337308B2 (en) | ||
KR20150050004A (en) | A Treatment System of Liquefied Natural Gas | |
CN116294427A (en) | Hydrogen liquefaction precooling system suitable for variable load working condition | |
KR20150138996A (en) | A Treatment System of Liquefied Gas |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11852972 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 1303959 Country of ref document: GB Kind code of ref document: A Free format text: PCT FILING DATE = 20111215 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1303959.9 Country of ref document: GB |
|
ENP | Entry into the national phase |
Ref document number: 2011352950 Country of ref document: AU Date of ref document: 20111215 Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2812605 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11852972 Country of ref document: EP Kind code of ref document: A1 |