Thermal conductivity of metal hydride materials for storage of hydrogen: Experimental investigation

摘要

The effective thermal conductivity of a powdery material, comprising heat conduction in the solid particles and in gas and temperature radiation across the pores, was determined by the transient hot wire method. The materials investigated were LaNi_4.7al_0.3H_x, which is practically applied at medium temperature, and HWT 5800, applied at low temperatures. The temperature range investigated was-80 to + 140 deg. C, the pressure range 10~-6 to 60 bar. The porosity of the powder materials in the state of delivery was 0.045 and 0.531.