Patent ID: 6487866
Filing Date: 2002-12-03
Classification: F25B,G01N

Abstract:
A thermal insulation apparatus adaptable for use with a boil-off flow measuring device for determining the thermal performance of a testing material, comprising:a) an inner vessel extending within the testing material, said inner vessel having a top, a bottom, a sidewall and a first liquid port for receiving a cryogenic fluid having a normal boiling point below ambient temperature; b) an outer vacuum chamber enclosing said inner vessel and the testing material and having a second liquid port; c) a conduit passing through said second liquid port of said outer vacuum chamber and into said first liquid port of said inner vessel through which said cryogenic fluid may pass from outside the vacuum chamber into the inner vessel; d) a first thermal insulation guard positioned at said top of said inner vessel; e) a second thermal insulation guard positioned at said bottom of said inner vessel.