Hydrogen liquefaction system without pre-cooling and intergrated lossless liquid hydrogen storage system

A hydrogen liquefaction system without pre-cooling based on a refrigeration cycle comprising:

• a first pipe set in which gaseous hydrogen supplied through a gaseous hydrogen buffer tank is liquefied into liquid hydrogen;
• a second pipe set through which refrigerant flows to exchange heat with gaseous hydrogen flowing through the first pipe set;
• a third pipe set through which refrigerant flows to exchange heat with gaseous hydrogen flowing through the first pipe set;
• a first heat exchanger and a second heat exchanger performing heat exchange between gaseous hydrogen flowing through the first pipe set and refrigerant flowing through the second pipe set and the third pipe set;
• and
• a third heat exchanger performing heat exchange between gaseous hydrogen flowing through the first pipe set and refrigerant flowing through the second pipe set, and
• wherein gaseous hydrogen is cooled by the first heat exchanger, the second heat exchanger, and the third heat exchanger to be liquefied into liquid hydrogen.