Patent ID: 7562534
Filing Date: 2009-07-21
Classification: F16L,F17C

Abstract:
1. A method for establishing a cryogenic insulation system comprising: (A) providing an insulation space containing aerogel and defined by an inner wall and an outer wall; (B) conducting at least one pressurization and at least one depressurization of the aerogel containing insulation space wherein the pressurization comprises providing condensable gas to the aerogel containing insulation space and the depressurization is to a level below atmospheric pressure; and (C) after the at least one depressurization is completed, cooling at least one wall of the aerogel containing insulation space to a temperature less than 190 K such that the condensable gas condenses to cause a further pressure reduction to occur and the aerogel adsorbs some quantity of the condensable gas and any non-condensable gases present within the insulation space to cause a yet further pressure reduction to occur within the insulation space.