Measuring heat leak with a heatmeter
- Resource Type
- Conference
- Authors
- Source
- Conference: Cryogenic engineering conference and international cryogenic materials conference, Boston, MA, USA, 12 Aug 1985; Other Information: Portions of this document are illegible in microfiche products
- Subject
- 47 OTHER INSTRUMENTATION
42 ENGINEERING HEAT METERS
CALIBRATION
DESIGN
HEAT FLOW
HEAT LOSSES
ENERGY LOSSES
LOSSES
MEASURING INSTRUMENTS
METERS 440300* -- Miscellaneous Instruments-- (-1989)
420400 -- Engineering-- Heat Transfer & Fluid Flow
- Language
- English
The heatmeter or more precisely the heatflowmeter is a device based on thermal conductivity measuring techniques. It consists of a thermal conducting body between two thermometers, with provisions for thermal connections and calibration. The paper describes the design, construction details, calibration and performance of one such heatmeter for use with heat reservoirs at either 4.2 K or 78 K. Near 4.2 K it has a sensitivity of 10 ..mu..W and requires less than a minute to reach steady state. Near 78 K its sensitivity is 10 MW and requires 25 minutes to reach steady state.