A refrigeration system circulates a fixed inventory of refrigerant to provide a specified amount of cooling to a heat load. Cooling is accomplished by work expansion of all or part of the refrigerant stream across a turboexpander or reciprocating expansion engine. Joule-Thomson (JT) expansion and cooling with an external refrigerant may also be employed. The refrigerator utilizes the heat of vaporization to cool the load and the additional cooling needed to overcome system losses. Much of the recycle stream is used to deliver the refrigeration but generates little refrigeration itself, only a minor amount of JT cooling results in higher efficiency.  A typical refrigeration system includes recycle compression and oil removal; a vacuum cold box containing valves, heat exchangers, adsorbers, and turboexpanders; refrigerant storage and distribution; and controls.

  • Refrigeration units offer lower power and capital costs than competing technologies


  • Contamination is usually minimal since there is no feed gas to act as a continual source of impurities. Single adsorbers at each appropriate temperature level are typically sufficient to mitigate impurities introduced by make-up refrigerant


  • Cryo Technologies typically provides helium refrigerators in capacities between 75W and 100kW.  Additional capacities are available upon request


  • Refrigerators can be designed with or without liquid nitrogen pre-cooling depending upon the availability and cost of liquid nitrogen


  • Computer control is standard, and systems are automated in accordance with customer preferences, including fully automatic start-up and shutdown where applicable


  • Nitrogen refrigerators are also available employing a similar design philosophy

7.5KW Helium Refrigerator Cold Box