Apparatus for direct measurement of insulation thermal performance at cryogenic temperatures
US7540656B1 · kind B1 · utility
16Cited by
3References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2007 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | May 11, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N25/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring insulation thermal performance is provided, particularly between ambient and cryogenic temperatures. A warm-temperature boundary has a continuous sample contact surface that is divided into a metered central zone and a boundary guard zone. Each zone is independently heated, and the power necessary to maintain the central zone at constant temperature is directly equated to heat flux through the insulation at the temperature boundary conditions. Methods for measuring insulation thermal performance are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.