Accurate Measurement and Database System of Thermophysical Properties of High-Pressure Hydrogen

Abstract

Accurate thermophysical properties of hydrogen are essential for the development of efficiently designed hydrogen-utilizing systems. Compressed hydrogen is supplied to fuel cell vehicles at hydrogen refueling stations, and the thermophysical properties at pressures up to 100 MPa are highly required. PVT property, speed-of-sound, viscosity, and thermal conductivity of high-pressure hydrogen have recently been measured, and the measurement techniques of them are presented. A database system compiling an equation of state and correlations based on the experimental data was developed, and an application of the database is also described.