Cold storage system

A cold material storage tank, comprising:

• an inner wall defining a storage region containing a plurality of pieces of solid material;
• an outer wall substantially surrounding said inner wall, the inner wall and outer wall together forming an interior space therebetween, the interior space comprising a low-pressure region;
• a port formed in the inner wall and the outer wall, the port defining an opening in the inner wall and the outer wall, the port configured to permit the ingress and egress of the plurality of pieces of solid material, the port coupling the inner wall to the outer wall;
• a support attached to the outer wall, within the interior space, at a location that is diametrically opposite the port, the support being engaged with a plurality of dents that are formed on the inner wall inside the interior space;
• a plurality of protrusions extending partially inward from the inner wall into the storage space, said plurality of protrusions being pitched towards the port in the form of a spiral;
• a cooler disposed adjacent the port outside the storage region, the cooler including a cold finger inserted into the port towards the storage region, and
• wherein the storage region contains the plurality of pieces of the solid material continuously submerged within a cryogenic liquid, and said plurality of pieces are not agitated until being removed from the storage region via the port.