Configurations and methods for thermal integration of LNG regasification and power plants
First Claim
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1. A thermally integrated regenerator configuration comprising:
- a regenerator configured to receive a rich freeze point depressant solution and further configured to form steam and a lean freeze point depressant solution from the rich solution;
wherein the regenerator is thermally coupled to an LNG-cooled heat transfer fluid circuit such that heat from the steam can be transferred to the heat transfer fluid; and
wherein the regenerator is further thermally coupled to a steam cycle such that heat from the steam cycle can be transferred to the rich freeze point depressant solution in the regenerator.
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Abstract
Contemplated plants integrate regeneration of a freeze point depressant with LNG regasification and a power cycle. Most preferably, the plant is a combined cycle plant in which heat for reboiling the regenerator is provided by the steam cycle, and in which LNG refrigeration content is used to condense steam from the regenerator and to further subcool intake air for a combustion turbine.
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Citations
20 Claims
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1. A thermally integrated regenerator configuration comprising:
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a regenerator configured to receive a rich freeze point depressant solution and further configured to form steam and a lean freeze point depressant solution from the rich solution; wherein the regenerator is thermally coupled to an LNG-cooled heat transfer fluid circuit such that heat from the steam can be transferred to the heat transfer fluid; and wherein the regenerator is further thermally coupled to a steam cycle such that heat from the steam cycle can be transferred to the rich freeze point depressant solution in the regenerator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of chilling intake air for a combustion turbine of a combined cycle power plant, comprising:
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combining a cooled air stream with a lean freeze point depressant solution to thereby form a mixture, and subcooling the mixture to a temperature of below 32°
F.;removing rich freeze point depressant solution from the subcooled mixture, and regenerating the lean freeze point depressant solution in a regenerator using heat from a working fluid of a steam power cycle of the combined cycle power plant, thereby forming steam as overhead product of the regenerator; and condensing the steam using a LNG-cooled heat transfer fluid. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification