[abstract]A cooling system for contaminated water diving using metal hydrides

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[abstract]A cooling system for contaminated water diving using metal hydrides

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Title: [abstract]A cooling system for contaminated water diving using metal hydrides
Author: Henkener, JA; Nuckols, ML; Robinson, K
Abstract: Introduction/Background: Contaminated-water missions often require divers to function in water temperatures exceeding 32°C while wearing bulky, vulcanized rubber dry suits. Mission durations and diver performance are severely degraded during such operations. The objective of this just-completed phase was to develop a compact, fully regenerative cooling source for U.S. Navy contaminated-water diving, utilizing the latent heats of hydrogen absorption and desorption from various metal alloy pairs. Materials and methods: A two-year initial phase demonstrated cooling rates in excess of 800 watts and capacities in excess of 250 watt-hours. Multiple metal hydrides were tested, and the latent heats of absorption and desorption were found to range from 21-34 kJ per gram mole of hydrogen. These initial findings were leveraged into a cooling system prototype utilizing the most efficient metal hydride pair. Results: Prototype phase was initiated in January 2009. System requirements were developed with major NAVSEA inputs. Cooling system detailed design was completed in 2009. Major design review meeting was held with NAVSEA personnel in January 2010. Prototype fabrication, subsystem testing, final system assembly and unmanned testing on a manikin at NCTRF were completed in 2010. Manned testing was completed late in 2010, and the final report was submitted in January 2011. The major goal of 200 watt-hours of cooling was shown to be achievable. Summary/Conclusions: The manned and unmanned testing of the prototype diver cooling system has demonstrated the viability of using metal hydrides to adequately cool a drysuit diver in warm contaminated water. Follow-up development effort has been proposed and needs to be funded so that a pre-production effort can be initiated. The preproduction effort will lead to refinements in the cooling system, U.S. Navy certification and the availability of diver cooling units to the fleet.
Description: Undersea and Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc.
URI: http://archive.rubicon-foundation.org/9478
Date: 2011

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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