A cryogenic refrigeration system and a corresponding method for increasing the cooling efficiency of the system, preferably the cooling of a thermally coupled load. Accordingly, the system comprises a supply means for providing a supply flow of a cryogenic refrigerant, a compressor fluidly coupled to said supply means and configured to compress the supplied cryogenic refrigerant, and a cold box fluidly coupled to the compressor, said cold box comprising a first expansion device and a first heat exchanger, wherein the first expansion device is configured to receive the compressed cryogenic refrigerant from the compressor and expand it and provide the expanded refrigerant to the first heat exchanger, and wherein the first heat exchanger is configured to be thermally coupled to a load. The system furthermore comprises a second heat exchanger arranged in the cold box comprising at least a first and second heat exchanging section.

Disclosed are a cold storage material and a cold storage type cryogenic refrigerator using same. The cold storage material is tin alloy particles, the content of tin in the tin alloy particle is not less than 40% and not more than 99%, and the cold storage material at least includes one component of bismuth, antimony, silver and gold. The cold storage type cryogenic refrigerator includes a cold storage device, and the cold storage material filled in the cold storage device is tin alloy particles, is lead-free, lowly toxic, easy in spherization and extremely accessible and has a relatively good thermal performance, has properties comparable to those of lead, and has a relatively good heat exchange performance when being used in a cold storage type refrigerator.

A heat-driven refrigeration/heat-pump system comprises at least one vapor expansion stage and at least one vapor compression stage, a condenser, and an evaporator, while the power consumption of the compression stages is fully supplied by the power output of the expansion stages. In the system, a vapor absorber/generator unit is adopted, such that at least one expansion stage is fed by the vapor from the generator, and at least one power stage; compression or expansion, delivers its output stream to the absorber instead of to the condenser. In the new arrangement the expansion stages produce surplus power, facilitating a supplementary refrigeration loop between the evaporator and the condenser to which there is no direct expense of heat from the generator, thereby improving the overall performance of the system.

Systems and methods for multi-stage refrigeration in mixed refrigerant and cascade refrigeration cycles using one or more liquid motive eductors.

Systems and methods for multi-stage refrigeration in mixed refrigerant and cascade refrigeration cycles using one or more liquid motive eductors.

Systems and methods for multi-stage refrigeration in mixed refrigerant and cascade refrigeration cycles using one or more liquid motive eductors in combination with a pump.

Disclosed are a cold storage material and a cold storage type cryogenic refrigerator using same. The cold storage material is tin alloy particles, the content of tin in the tin alloy particle is not less than 40% and not more than 99%, and the cold storage material at least includes one component of bismuth, antimony, silver and gold. The cold storage type cryogenic refrigerator includes a cold storage device, and the cold storage material filled in the cold storage device is tin alloy particles, is lead-free, lowly toxic, easy in spherization and extremely accessible and has a relatively good thermal performance, has properties comparable to those of lead, and has a relatively good heat exchange performance when being used in a cold storage type refrigerator.

Systems and methods for multi-stage refrigeration in mixed refrigerant and cascade refrigeration cycles using one or more liquid motive eductors in combination with a pump.

Systems and methods for multi-stage refrigeration in mixed refrigerant and cascade refrigeration cycles using one or more liquid motive eductors in combination with a pump.

Systems and methods for multi-stage refrigeration in mixed refrigerant and cascade refrigeration cycles using one or more liquid motive eductors.