Cryogenic Concepts

摘要

We frequently encounter people who need to use cryogenics but don't know how to do it. In one recent case a large aluminum surface in a space chamber was to be maintained at approximately 77K. In another application, an adsorbent bed was to be held near 80K during flight operations. People working on each project were initially thinking of a pump and sump arrangement but were not happy with the complexity and power require-ments.