Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website; (3) the federal government Internet portal; or (4) a web search conducted using a commercial search engine such as
Accession Number ADA562618
Title Improved Round Trip Efficiency for Regenerative Fuel Cell Systems.
Publication Date May 2012
Media Count 23p
Personal Author K. E. Ayers
Abstract In developing technology for air independent undersea vehicle missions, a ground-test breadboard system was adapted and utilized to prove advanced components that enable closed-loop, zero emission, low signature energy storage. The system utilizes proton exchange membrane (PEM) fuel cell and electrolysis technology with proven commercial reliability, and a balance- of-plant primarily consisting of commercial-off-the-shelf (COTS) components. Initial durability testing measured the magnitude of reactant loss to the ambient atmosphere, before replacing components known to contribute to this loss as observed during tests in a previous program. Advanced components to mitigate these losses were designed and tested at a bench-top level before integrated testing within the breadboard system. A final round of cyclic testing was conducted with advanced reactant circulation during fuel cell power generation as well as complete hydrogen recovery during the electrolysis recharge period.
Keywords Atmospheres
Breadboard models
Closed loop systems
Commercial equipment
Energy storage
Fuel cells
Fuel systems
Integrated systems
Low energy
Off the shelf equipment
Underwater vehicles
Uuv(Unmanned underwater vehicles)

Source Agency Non Paid ADAS
NTIS Subject Category 97M - Batteries & Components
97K - Fuels
Corporate Author Office of Naval Research, Arlington, VA.
Document Type Technical report
Title Note Final rept. 11 Mar 2011-11 May 2012.
NTIS Issue Number 1225
Contract Number N00014-10-C-0369

Science and Technology Highlights

See a sampling of the latest scientific, technical and engineering information from NTIS in the NTIS Technical Reports Newsletter

Acrobat Reader Mobile    Acrobat Reader