Cooling system and method of cooling

A method for cooling hot material, comprising:

• providing a cooling chamber having a heat exchanger therein occupying only a fraction of a cross sectional space in said chamber;
• forcing a cooling gas within said chamber in a closed circuit in said chamber that includes cooling contact with the heat exchanger;
• passing said hot material from a source thereof externally of said chamber through said heat exchanger and back to said source;
• and selectively providing when needed an additional vaporizable liquid cryogenic cooling medium to the closed cooling gas circuit for providing supplemental cooling for said hot material during its passage through said heat exchanger.

Apparatus, comprising:

• a heated member;
• cooling means therefor including means for contacting said member with a cooling fluid material that becomes heated during said contact to become a hot fluid material;
• a cooling chamber separate from said heated member;
• a heat exchanger in said chamber occupying only a fraction of a cross sectional space in said chamber;
• gas circulating means for forcing a cooling gas within said chamber in a closed circuit within said space in said chamber that includes cooling contact with said heat exchanger, said heat exchanger and gas circulating means comprises a cooling unit comprising a casing, heat exchange coil means mounted therein and mounting means on said casing for supporting said gas circulating means;
• means for passing said hot fluid material through said heat exchanger and back to said heated member;
• means for introducing a vaporizable cryogen and thereby additional cooling gas to said closed circuit of said cooling gas for selectively providing when needed an additional cooling medium to said cooling gas circuit in said chamber;
• and means for directing said hot fluid material through said coil means.

A method for cooling a hot material, comprising:

• contacting a heated member with a cooling material that becomes heated during said contact to become a hot material;
• providing a cooling chamber separate from said heated member and a heat exchanger in said chamber occupying only a fraction of a cross sectional space in said chamber;
• forcing a cooling gas within said chamber in a closed circuit in said chamber that includes cooling contact with the heat exchanger;
• passing said hot material from said heated member through said heat exchanger and back to said heated member;
• and selectively providing an additional cooling medium to the cooling gas circuit during excess heat loads of said hot material for providing supplemental cooling for said hot material during its passage through said heat exchanger by supplying a vaporizable cryogen to said gas circuit on the upstream side of said heat exchanger in relation to the cooling gas circuit.