%A Liang YIN, Yonglin JU %T Review on the design and optimization of hydrogen liquefaction processes %0 Journal Article %D 2020 %J Front. Energy %J Frontiers in Energy %@ 2095-1701 %R 10.1007/s11708-019-0657-4 %P 530-544 %V 14 %N 3 %U {https://journal.hep.com.cn/fie/EN/10.1007/s11708-019-0657-4 %8 2020-09-15 %X

The key technologies of liquefied hydrogen have been developing rapidly due to its prospective energy exchange effectiveness, zero emissions, and long distance and economic transportation. However, hydrogen liquefaction is one of the most energy-intensive industrial processes. A small reduction in energy consumption and an improvement in efficiency may decrease the operating cost of the entire process. In this paper, the detailed progress of design and optimization for hydrogen liquefaction in recent years are summarized. Then, based on the refrigeration cycles, the hydrogen liquefaction processes are divided into two parts, namely precooled liquefaction process and cascade liquefaction process. Among the existing technologies, the SEC of most hydrogen liquefaction processes is limited in the range of 5–8 kWh/ k g L H 2 : liquid hydrogen). The exergy efficiencies of processes are around 40% to 60%. Finally, several future improvements for hydrogen liquefaction process design and optimization are proposed. The mixed refrigerants (MRs) as the working fluids of the process and the combination of the traditional hydrogen liquefaction process with the renewable energy technology will be the great prospects for development in near future.