Low-Cost, Metal Hydride Based Hydrogen Storage System for Fuel Cell Powered Forklifts

C.M. Jensen and A.A. Narvaez
Hawaii Hydrogen Carriers, US

Keywords: metal hydride, AB5, ENG, PEM fuel cell, forklift

Summary:

Most hydrogen fuel cell powered forklifts use high-pressure, compressed gas storage tanks. In addition to safety concerns, the required high-pressure fueling infrastructure adds capital and operating cost to the user. Metal hydrides can be used at much lower pressures which reduce safety risks, and store at least the same amount of hydrogen as a high-pressure tank. Eliminating the need for high pressure fueling infrastructure (1,000 psi vs 3,000 psi), metal hydride storage can also reduce the overall delivery cost of hydrogen. However, one disadvantage of using metal hydrides is its exothermicity during recharge, which requires significant heat rejection capability of the system. The main focus of this work is to prove metal hydride solid-state based systems provide a cost competitive, favorable hydrogen storage option for zero-emission, low-speed material handling vehicles in industrial applications.