Intermittent De-Icing During Continuous Regasification of a Cryogenic Fluid Using Ambient Air
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United States of America Patent
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Issued Date -
May 21, 2009
app pub date -
Nov 16, 2007
filing date -
Nov 16, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to a process and apparatus for regasifying a cryogenic liquid to gaseous form. Heat is transferred from ambient air to the cryogenic liquid across a heat transfer surface by circulating the cryogenic liquid or an intermediate fluid through an atmospheric vaporizer, wherein he ambient air and the cryogenic fluid or intermediate fluid are not in direct contact. A layer of ice forms on an external portion of the heat transfer surface exposed to the atmosphere where the temperature at the heat transfer surface is below the freezing temperature of water. The layer of ice is dislodged intermittently from the vaporizer using a source of heat operatively associated with a control device, the control device arranged to generate a signal when de-icing is required. De-icing is achieved without the need to discontinue circulating the cryogenic fluid or the intermediate fluid through the vaporizer.
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