Stories
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Briefs: Manufacturing & Prototyping
Unlike water, liquid refrigerants and other fluids that have a low surface tension spread quickly into a sheet when they come into contact with a surface. For many industrial processes,...
Briefs: Electronics & Computers
Sandia National Laboratories researchers designed a cooling system for supercomputer centers that is expected to save four to five million gallons of water annually in New Mexico if...
Briefs: Materials
Passivation of Flexible YBCO Superconducting Current Lead With Amorphous SiO₂ Layer
Adiabatic demagnetization refrigerators (ADR) are operated in space to cool detectors of cosmic radiation to a few 10s of mK. A key element of the ADR is a superconducting magnet operating at about 0.3 K that is continually energized and de-energized in...
Briefs: Manufacturing & Prototyping
A design of an Active Magnetic Regenerative Refrigeration (AMRR) system has been developed for space applications. It uses an innovative 3He cryogenic circulator to...
Briefs: Manufacturing & Prototyping
Development of a Centrifugal Technique for the Microbial Bioburden Analysis of Freon (CFC-11)
NASA Procedural Requirement 8020.12C entitled “Planetary Protection Provisions for Robotic Extraterrestrial Missions” states that the source-specific encapsulated microbial density for encapsulated organisms (div(0)) in nonmetallic materials ranges...
Briefs: Green Design & Manufacturing
A design of a highly efficient and lightweight space magnetic cooler has been developed at Goddard Space Flight Center that can continuously provide remote/distributed cooling at temperatures in the range of 2 K with a heat sink at about 15 K. The innovative design uses a cryogenic circulator that enables the cooler to operate at a high cycle frequency to achieve a large cooling capacity.
Briefs: Manufacturing & Prototyping
Method for Selective Cleaning of Mold Release From Composite Honeycomb Surfaces
Honeycomb structures are commonly employed as load- and force-bearing structures as they are structurally strong and lightweight. These structures include many aircraft and spacecraft surfaces, including aircraft wings and fuselages, spacecraft pressure vessels, and...
Briefs: Physical Sciences
Instrument for Measuring Thermal Conductivity of Materials at Low Temperatures
With the advance of polymer and other non-metallic material sciences, whole new series of polymeric materials and composites are being created. These materials are being optimized for many different applications including cryogenic and low-temperature industrial...
Briefs: Materials
Improved Thermal-Insulation Systems for Low Temperatures
Improved thermal-insulation materials and structures and the techniques for manufacturing them are undergoing development for use in low-temperature applications. Examples of low-temperature equipment for which these thermal insulation systems could provide improved energy efficiency include...
Briefs: Physical Sciences
Regulating Pressure-Volume Control of a Gas Blanketing Liquid R-124
A system for storing and circulating a refrigerant liquid [R- 124 (chloro- tetrafluoroethane)] includes a reservoir and a subsystem that regulates the pressure of nitrogen gas in the head space of the reservoir. The purpose of the pressurization is to prevent cavitation in a pump...
Briefs: Materials
Refrigerant Blends Containing Trifluoroiodomethane
Blends of refrigerant fluids have been developed as improved alternatives to conventional chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) refrigerants, which contribute to depletion of stratosphere ozone. Each blend of this type is a zeotropic or nearly azeotropic mixture of...
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