cryogenics.nist.govCryogenics

Cryogenic Technology Resources The resources presented on this website are part of the output from the NIST Cryogenic Technologies Group that existed as a group from 1995 to 2009. Some limited activities continue today. The activities are divided into four areas: Education. Publications and short courses about cryogenics and its applications for use by the public and professionals. Click on the “About ” link for a brief definition of cryogenics and its uses. Click on the “Publications” link for more detailed information. Cryocooler Research. Cooling to cryogenic temperatures is often carried out by the use of cryocoolers. NIST has carried out theoretical and experimental research on improved refrigeration processes and technologies to achieve cryogenic temperatures more efficiently, more reliably, and more compactly. Click on the “Cryocoolers” link to learn more about cryocoolers. Free software for the analysis of regenerative heat exchangers in regenerative cryocoolers is available under the “Software” link. Further information about cryocoolers can be found in the “Publications” section. Cryogenic Material Properties Database. This database is a critical evaluation of existing experimental measurements on the properties of engineering materials at cryogenic temperatures (including room temperature and above). Equations are given for the recommended property value as a function of temperature. Click on the “Material Properties” link to enter this database. These correlations were developed as part of a past NIST Standard Reference Data (SRD) project. Properties of cryogenic fluids can be accessed under the “Fluid Properties” link. The fluid property data are part of the ongoing REFPROP project, another NIST Standard Reference Data (SRD) project. Cryogenic Flow Calibration. Calibration of flow meters at cryogenic temperatures can be carried out and certified to NIST. Liquid nitrogen is used in the calibration, but the calibration is also valid for liquefied natural gas (LNG). Click on “Flow Calibrations” link for more information. Contact Information Ray Radebaugh (project leader, NIST Fellow emeritus); ray.radebaugh@nist.gov; 303-497-3710. Peter Bradley (material properties); peter.bradley@nist.gov; 303-497-3465. Michael Lewis (flow calibrations); michael.lewis@nist.gov; 303-497-3458. Gary Hardin (Webmaster); gary.hardin@nist.gov; 303-497-5168....