Small-scale hydrogen liquefaction system equipped with cryocooler

A small-scale hydrogen liquefaction system employing multiple cryocoolers connected in series with each other to liquefy gaseous hydrogen through multiple cooling stages, the system comprising:

• a pre-cooling heat exchanger for pre-cooling gaseous hydrogen using liquid nitrogen;
• n cryocoolers sequentially connected in series from a first cryocooler to a n-th cryocooler and configured such that the gaseous hydrogen pre-cooled by the pre-cooling heat exchanger flows through the sequentially connected n cryocoolers and is cooled to a liquefaction temperature, wherein n is a natural number equal to or greater than 2;
• n−1 heat exchangers each attached to a cold head of each of the first cryocooler to the (n−1)-th cryocooler;
• a condensation plate arranged to be in contact with the n-th cryocooler to liquefy the gaseous hydrogen, which is cooled to the liquefaction temperature by the n-th cryocooler;
• and
• a low-temperature chamber providing an accommodation space to accommodate the pre-cooling heat exchanger and the first cryocooler to the n-th cryocooler therein.