L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
대리인 / 주소
Cronin, Christopher J.
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초록▼
Method and installation for refrigerating the same application by means of several refrigerators/liquefiers disposed in parallel, the refrigerators/liquefiers in parallel using a working gas of the same nature having a low molar mass, that is to say having a mean total molar mass of less than 10 g/m
Method and installation for refrigerating the same application by means of several refrigerators/liquefiers disposed in parallel, the refrigerators/liquefiers in parallel using a working gas of the same nature having a low molar mass, that is to say having a mean total molar mass of less than 10 g/mol such as pure gaseous helium, each refrigerator/liquefier comprising a station for compressing the working gas, a cold box intended to cool the working gas at the output from the compression station, the working gas cooled by each of the respective cold boxes of the refrigerators/liquefiers being put in thermal exchange with the application with a view to supplying cold to the latter, in which a single compression station compresses the working gas for each of the respective separate cold boxes of the refrigerators/liquefiers disposed in parallel, the single compression station comprising only compression machines of the lubricated-screw type and systems for removing oil from the working fluid output from the compression machines, so that the compression machines and the oil-removal systems are shared by the refrigerators/liquefiers disposed in parallel.
대표청구항▼
1. An installation for the cryogenic refrigeration of a same application using several refrigerators/liquefiers, the refrigerators/liquefiers using a working gas having a mean total molar mass of less than 10 g/mol, wherein: each refrigerator/liquefier receives working gas from a single shared compr
1. An installation for the cryogenic refrigeration of a same application using several refrigerators/liquefiers, the refrigerators/liquefiers using a working gas having a mean total molar mass of less than 10 g/mol, wherein: each refrigerator/liquefier receives working gas from a single shared compression station so that each of the refrigerators/liquefiers is in downstream flow communication in parallel from the single shared compression station, the single shared compression station compressing the working gas, each refrigerator/liquefier comprising an associated cold box cooling and expanding the working gas at an output from the single shared compression station to a cryogenic temperature;the working gas that is cooled by each of the cold boxes of the refrigerators/liquefiers supplies cold to said same application via thermal exchange; andsaid single shared compression station comprising two or more compression machines only of the lubricated-screw type and two or more systems for removing oil from the working fluid from the compression machines, so that each of the compression machines and the oil-removal systems is shared by the refrigerators/liquefiers in downstream flow communication in parallel. 2. The installation of claim 1, wherein the two or more compression machines provide the working fluid at several pressure levels. 3. The installation of claim 2, wherein passage of a pressure of the working fluid from one pressure level to a higher pressure level is achieved via one or more of the compression machines in series or in parallel. 4. The installation of claim 2, wherein passage of a pressure of the working fluid from at least one pressure level to a higher pressure level is achieved via two of the compression machines disposed in parallel, the oil-removal system comprising either a single oil-removal member disposed at outlets of the two compression machines disposed in parallel or two oil-removal members each one of which is disposed at a respective outlet of a respective one of to the two compression machines disposed in parallel. 5. The installation of claim 2, further comprising at least one exchanger for cooling the working fluid downstream of at least one of the compression machines. 6. The installation of claim 1, wherein: the two or more compression machines comprise first, second, and third compression machines providing the working fluid at a corresponding three increasing pressure levels above a pressure level of the working fluid at an inlet of the compression station,the first and second compression machines are disposed in series and provide, at respective fluid outlets thereof, the working fluid at respective low and high pressure levels,the third compression machine is supplied at an inlet thereof with working fluid issuing from the cold boxes at a medium pressure level between the low and high levels, the third compression machine providing the working fluid at a fluid outlet thereof at a pressure level equal to the pressure of the working fluid provided at the fluid outlet of the second compression machine. 7. The installation of claim 6, wherein the two or more compression machines further comprise a fourth compression machine disposed in parallel with the second compression machine, an outlet of the fourth compression machine being connected to the inlet of the third compression machine. 8. The installation of claim 6, wherein an outlet of the third compression machine and the outlet of the second compression machine are connected to a common conduit providing the working gas at the same high pressure level. 9. The installation of claim 6, wherein the outlet of the third compression machine and the outlet of the second compression machine are connected to at least one cold box at separate locations providing the working gas at respective separate high pressure levels. 10. A method for refrigerating a same application with a refrigeration and/or liquefaction installation comprising several refrigerators/liquefiers, the refrigerators/liquefiers using a working gas having a mean total molar mass of less than 10 g/mol, wherein: each refrigerator/liquefier receives working gas from a single shared compression station so that each of the refrigerators/liquefiers is in downstream flow communication in parallel from the single shared compression station, the single shared compression station compressing the working gas, each refrigerator/liquefier comprising an associated respective cold box adapted and configured to cool and expand the working gas discharged from the single shared compression station where the working gas is brought to a cryogenic temperature upon discharge from the cold box;the working gas cooled and expanded by the respective cold boxes of the refrigerators/liquefiers supplies cold to said same application via heat exchange;the single shared compression station comprising solely compression machines of the lubricated-screw type and systems for removing oil from the working fluid discharged from the compression machines, so that each of the compression machines and the oil-removal systems is shared by the refrigerators/liquefiers in downstream flow communication in parallel. 11. The method of claim 10, where the working gas comprises helium. 12. The method of claim 10, wherein the working gas essentially consists of helium.
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이 특허에 인용된 특허 (4)
Holden Steven J. (Manlius NY) Schwoerer John A. (Boston MA), Back pressure control for improved system operative efficiency.
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