Investigation and Demonstration of Cryogenic Hydrogen Gas Production by Gas-liquid Mixing

Abstract

Hydrogen is expected to be one of the key energy sources because it can be produced from a variety of energy sources and does not emit greenhouse gases when used. Liquefied hydrogen is one of the most promising carriers for large-scale transportation and storage in terms of density and purity for the construction of an international hydrogen supply chain. Since liquid hydrogen boils at cryogenic temperatures, it boils during transportation/storage. To make effective use of this boiling hydrogen gas, the gas should be compressed and delivered to power generation facilities. However, a large-scale cryogenic hydrogen gas compressor for a liquefied hydrogen receiving terminal does not exist. To conduct a demonstration test for such a compressor, it is necessary to supply cryogenic hydrogen gas at an arbitrary temperature, pressure, and flow rate. In this study, an effective cyrogenic gas generation system by mixing gas-liquid hydrogen is investigated and developed. Gas production at arbitrary temperature at a maximum flow rate of 550 Nm³/h was successfully achieved.