Sensitivity Analysis in Simple Cycles for Hydrogen Liquefaction

Due to the increase in global energy demand, as well as environmental concerns, hydrogen presents itself as a promising energy source. Nevertheless, a hydrogen energy chain depends on its storage and transportation. Liquid hydrogen is more suited for long-distance transportation and is a lower volume-consuming form. Hydrogen liquefaction, however, is an energy-intensive process, and many studies have been published proposing more efficient liquefaction cycles. These studies focus only on the optimum cycle’s operation conditions and do not assess fully the characteristics of the cycles. In this study, simple hydrogen liquefaction cycles were assessed, regarding the influence of the cycle’s high pressure on the energy efficiency, exergy destruction, and its distribution along the equipment. Among the main results, Claude and Precooled Linde-Hampson cycles presented a specific energy consumption (SEC) of 16.47 kWh/kgLH and 45.07 kWh/kgLH, respectively.