Memorial University requires a reliable source of nitrogen to run several of their research programs.  They have purchased a StirLIN-1 expandable system that produces 12 L/h of liquid nitrogen.

Liquid nitrogen applications at Memorial University

• Preservation of irreplacceable cell lines for cancer research and immunology.
• Tissue grinding and clinical applications.
• Instrumentation
• Cold traps for vacuum line and pump applications
• Multi-dimensional High filed NMR
• SQUID magnetometer and 5T magnet
• Magnetic resonance
• Cryostat in the Ultrasonic Lab for Elastic and Magnetic Properties of Materials

Akzo Nobel's Pharmaceutical Division (Organon) has developed a product that is commercialized as an aqueous solution. Droplets of this product are freeze dried for storage. This process requires a refrigeration system capable of cooling the product between -70ºC and -90ºC.

Stirling designed a closed loop system with methanol used as a coolant. The methanol is cooled by a standard cryogenerator, stored in a small vessel and pumped to the client's equipment where the droplets are frozen. The heated methanol is then returned to the cryogenerator to be cooled again and restart the cycle. The Stirling Cryogenerator uses gas helium as the refrigerant. 

The Hong-Kong University requires high purity nitrogen gas for purging and standard purity liquid nitrogen for cooling applications. Stirling designed a nitrogen plant that can produce two levels of purity, as needed by the University. The system includes a double storage vessel for low and high purity nitrogen. The two products are liquefied by one single cryogenerator, cutting down on capital costs.