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Method and apparatus for heat extraction by controlled spray cooling

United States Patent

November 30, 1999
View the Complete Patent at the US Patent & Trademark Office
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Two solutions to the problem of cooling a high temperature, high heat flux surface using controlled spray cooling are presented for use on a mandrel. In the first embodiment, spray cooling is used to provide a varying isothermal boundary layer on the side portions of a mandrel by providing that the spray can be moved axially along the mandrel. In the second embodiment, a spray of coolant is directed to the lower temperature surface of the mandrel. By taking advantage of super-Leidenfrost cooling, the temperature of the high temperature surface of the mandrel can be controlled by varying the mass flux rate of coolant droplets. The invention has particular applicability to the field of diamond synthesis using chemical vapor deposition techniques.
Edwards; Christopher Francis (Livermore, Alameda County, CA), Meeks; Ellen (Livermore, Alameda County, CA), Kee; Robert (Livermore, Alameda County, CA), McCarty; Kevin (Livermore, Alameda County, CA)
08/ 709,496
September 6, 1996
STATEMENT OF GOVERNMENT INTEREST The Federal government has rights in this invention pursuant to contract no. DE-AC04-94AL8500 between the U.S. Department of Energy and Sandia Corporation.