Triad National Security, LLC

Other

Robert A Zimmerman

Robert Stowers Reid

Morgan T Biel

Todd Andrew Jankowski

Cody Mathew Williams

Kirk Weisbrod

Martin J Ward

Stephen J Obrey

Katrina M Sweetland

Lindsey M Gaspar

Lydia Wermer

Justin Simpson

A method for forming an annular heat pipe wick in a controlled atmosphere includes wrapping a plurality of layers of a fine mesh screen around a mandrel to form a wick. The method also includes inserting the mandrel and the wick into a sheath, and compressing the wick between the sheath and the mandrel to form an assembly. The compressing of the wick comprises applying pressure to an exterior of the mandrel and the sheath. The method further includes diffusion bonding the assembly at a temperature sufficiently high achieving self-diffusion of the plurality of layers of the fine mesh screen used to form the wick to themselves. The method also includes cooling the diffusion bonded assembly to room temperature, and etching the mandrel and sheath from the diffusion bonded assembly, leaving the wick as a porous tube.

Heat pipe wick formation

A pump assisted heat pipe may combine the low mass flow rate required of latent heat pipe transfer loops with a hermetically sealed pump to overcome the typical heat pipe capillary limit. This may result in a device with substantially higher heat transfer capacity over conventional pumped single-phase loops, heat pipes, loop heat pipes, and capillary pumped loops with very modest power requirements to operate. Further, one or more embodiments overcome the gravitation limitations in the conventional heat pipe configuration, e.g., when the heat addition zone is above the heat rejection zone, the capillary forces are required to transfer the liquid from the heat rejection zone to the heat addition zone against gravity.

Counter gravity heat pipe techniques

A system adapted for the application of a moisture-proof barrier to a substrate. The system comprises a liquid rubber precursor formulation and an isocyanate formulation which are adapted for mixing to provide a reactive mixture for application to the substrate. The liquid rubber precursor includes a hydroxyl terminated butadiene polymer, a polyether triol, an organo-mercury catalyst, carbon black, a low oil absorbency silica, a suspending agent for the silica, a molecular sieve dessicant, a limited proportion of an organic solvent, and lecithin in an amount sufficient to provide a formulation viscosity of not greater than about 20,000 cps at 27.degree. C. The second formulation contains a urethane prepolymer derived from a polypropylene glycol ether polyol and toluene diisocyanate, containing between about 13 and about 17% by weight free isocyanate groups.

Coating system

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Los Alamos, NM, United States of America

Robert A Zimmerman