Conveners
C1Po2A: Aerospace Applications I: Devices
- Kjell Westra
- Ryan Grotenrath (NASA Glenn Research Center)
We developed a stepping motor working in a cryogenic environment with small heat dissipation from it. While a cryogenic motor is commercially available, a user must prepare a cryogenic environment that can tolerate a large heat dump during the operation.
We modified a commercial stepping motor (TAMAGAWA SEIKI CO., LTD) for room temperature usage. The components of the motor were replaced...
Over the last twelve years, Gloyer-Taylor Laboratories (GTL) has been developing and testing a series of ultra-lightweight composite cryogenic propellant tanks in a range of sizes (16” dia to 63” dia) and form factors (cylinders and spheres). These cryotanks have been validated to deliver 75% mass reduction compared to equivalent state-of-the-art cryotanks.
For example, GTL’s 48” dia x 96”...
In the application of infrared detectors, pulse tube cryocoolers are required to provide cooling power at different temperature ranges simultaneously with light weight and compact construction. Generally, each pulse tube cryocooler can provide cooling power in a certain temperature range with only one cooled sink that is the cold-end heat exchanger. In this paper, a single stage pulse tube...
A micro coaxial pulse tube cryocooler has been developed for infrared detection by Key Laboratory of Technology on Space Energy Conversion, CAS. It has a tiny size and high frequency, driving by the linear compressor, and using the combination of inertance tube and buffer as phase shifter. At present, the operating frequency of this pulse tube cryocooler is 175Hz - 215 Hz, and it can provide a...
A high-efficiency single-stage coaxial pulse tube cryocooler operating at around 35K has been developed for long wavelength infrared detectors. The design considerations are presented, and with the cryocooler model of the Sage, the optimizations on the length of regenerator are described. By experimentally investigation, the cooler prototype has achieved a no-load temperature of 24K, with an...
The Johnson Space Center’s Space Environment Simulation Lab (SESL) has both Chamber A, the world’s largest purpose-built thermal vacuum chamber capable of creating deep space conditions, and Chamber B, the largest human rated thermal vacuum chamber. A unique design feature of these chambers is the gaseous helium cryopumping panels within the liquid nitrogen shroud. This shroud is used to bring...
