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A hydraulic motor-alternator system for ocean-submersible vehicles

Show simple item record Aintablian, Harry O. Valdez, Thomas I. Jones, Jack A. 2013-02-25T21:37:26Z 2013-02-25T21:37:26Z 2012-07-30
dc.identifier.citation AIAA-IEEE International Energy Conversion Engineering Conference, Atlanta, Georgia, July 30 - 1 August, 2012. en_US
dc.identifier.clearanceno 12-2913
dc.description.abstract An ocean-submersible vehicle has been developed at JPL that moves back and forth between sea level and a depth of a few hundred meters. A liquid volumetric change at a pressure of 70 bars is created by means of thermal phase change. During vehicle ascent, the phase-change material (PCM) is melted by the circulation of warm water and thus pressure is increased. During vehicle descent, the PCM is cooled resulting in reduced pressure. This pressure change is used to generate electric power by means of a hydraulic pump that drives a permanent magnet (PM) alternator. The output energy of the alternator is stored in a rechargeable battery that powers an on-board computer, instrumentation and other peripherals. The focus of this paper is the performance evaluation of a specific hydraulic motor-alternator system. Experimental and theoretical efficiency data of the hydraulic motor and the alternator are presented. The results are used to evaluate the optimization of the hydraulic motor-alternator system. The integrated submersible vehicle was successfully operated in the Pacific Ocean near Hawaii. A brief overview of the actual test results is presented. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012. en_US
dc.subject power en_US
dc.subject hydraulic motor en_US
dc.subject alternator en_US
dc.title A hydraulic motor-alternator system for ocean-submersible vehicles en_US
dc.type Preprint en_US

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