Method and Apparatus for Cooling in Liquefaction Process
First Claim
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1. A cryogenic liquefaction device comprising:
- a heat exchanger;
a first phase separator;
a first expansion device;
a first expansion turbine;
a second expansion turbine;
a cold recovery circuit including a heat transfer fluid; and
an arrangement of conduits, wherein;
the operating inlet pressures of the first and second expansion turbines are different from one another; and
the arrangement of conduits is arranged such that;
a first portion of a pressurised stream of gas is directed through the heat exchanger, the first expansion device and the first phase separator;
a second portion of the pressurised stream of gas is directed through the first expansion turbine, then through the heat exchanger in a counter-flow direction to the first portion of the pressurised stream of gas, and then through the second expansion turbine, andthe heat transfer fluid is directed through the heat exchanger.
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Abstract
Methods and apparatus are disclosed for efficient cooling within air liquefaction processes with integrated use of cold recycle from a thermal energy store.
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Citations
37 Claims
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1. A cryogenic liquefaction device comprising:
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a heat exchanger; a first phase separator; a first expansion device; a first expansion turbine; a second expansion turbine; a cold recovery circuit including a heat transfer fluid; and an arrangement of conduits, wherein; the operating inlet pressures of the first and second expansion turbines are different from one another; and the arrangement of conduits is arranged such that; a first portion of a pressurised stream of gas is directed through the heat exchanger, the first expansion device and the first phase separator; a second portion of the pressurised stream of gas is directed through the first expansion turbine, then through the heat exchanger in a counter-flow direction to the first portion of the pressurised stream of gas, and then through the second expansion turbine, and the heat transfer fluid is directed through the heat exchanger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 33)
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28. A cryogenic liquefaction device comprising:
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a heat exchanger; a first phase separator; a first expansion device; a first expansion turbine; a first compressor; a cold recovery circuit including a heat transfer fluid; and an arrangement of conduits, arranged such that; a first portion of a pressurised stream of gas is directed through the heat exchanger, the first expansion device and the first phase separator; a second portion of the pressurised stream of gas is directed through the first expansion turbine, then through the heat exchanger in a counter-flow direction to the first portion of the pressurised stream of gas, and then through the first compressor, and the heat transfer fluid is directed through the heat exchanger. - View Dependent Claims (29, 30, 31, 32)
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34. A method for balancing a liquefaction process with the use of cold recycle from an external thermal energy source comprising:
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directing a first portion of a pressurised stream of gas through a heat exchanger, a first expansion device, and a first phase separator; directing a second portion of a pressurised stream of gas through a first expansion turbine, then through the heat exchanger in a counter-flow direction to the first portion of the pressurised stream of gas, and then through a second expansion turbine; and directing a heat transfer fluid through a cold recovery circuit and the heat exchanger;
wherein;operating inlet pressures of the first and second expansion turbines are different from one another. - View Dependent Claims (36)
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35. A method for balancing a liquefaction process with the use of cold recycle from an external thermal energy source comprising:
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directing a first portion of a pressurised stream of gas through a heat exchanger, a first expansion device, and a first phase separator; directing a second portion of a pressurised stream of gas through a first expansion turbine, then through the heat exchanger in a counter-flow direction to the first portion of the pressurised stream of gas, and then through a first compressor; and directing a heat transfer fluid through a cold recovery circuit and the heat exchanger. - View Dependent Claims (37)
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Specification