An Energy Dense-AI-NaBH4-PEMFC Based Power Generator for Unmanned Undersea Vehicles
Abstract
The main objective of this work is to develop a high-energy density air-independent power generator for UUVs based on a combination of polymer electrolyte membrane fuel cell (PEMFC) with a compact hydrogen generator utilizing AI-NaBH4 composite fuel. The conditions for the energy-dense and stable storage of NaBH4 slurries and dense solutions forthe extended period of time (6 months and longer) with minimal degradation rate (0.05-0.35% per month) have been determined. The effect of seawater on the kinetics of NaBH4 and AI-NaBH4 hydrolysis has been elucidated. Seawater minerals (especially, Mi+) showed catalytic effect on NaBH4 hydrolysis. The catalytic effect of AI hydrolysis products on the NaBH4 hydrolysis was studied. Continuous stable production of a stream of high-purity(99.999%, w/out water vapor) hydrogen by AI-NaBH4 hydrolysis in water and seawater at the temperature range of 90C has been demonstrated. A breadboard power generation unit consisting of NaBH4 delivery system, AI-NaBH4 hydrolysis reactor and PEMFC has been designed, assembled and performance tested. The unit's performance was comparable to that of PEMFC powered by high-purity H2 from a tank, which points to the high efficiency of the developed power generation system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2016
- Accession Number
- AD1007683
Entities
People
- Nazim Muradov