Effect of thermocouple sheaths on the temperature response in thermal property measurement

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Int. Chem. Eng.; (United States)

OSTI ID:5225805

Miura, T; Fukai, J; Ohtani, S; Tanno, S

The disturbance of the temperature field in a cylindrical specimen due to the position of a thermocouple probe and due to the thermal properties of its insulating sheath was calculated by the finite-element method. The errors of measurement were calculated for both continuous and periodic heating. When the thermal diffusivities of the thermocouple and the sheath are higher/lower than that of the specimen, the temperature of the specimen is higher/lower than when they are equal. The errors are smaller, the closer the thermal diffusivity of the sheath is to that of the specimen. The errors are reduced if a side-wall thermocouple is some distance from the surface of the specimen.

• Research Organization: Research Institute of Combustion Engineering for Effective Use of Energy, Tohoku University
• OSTI ID: 5225805
• Journal Information: Int. Chem. Eng.; (United States), Journal Name: Int. Chem. Eng.; (United States) Vol. 25:2; ISSN INCEA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CYLINDERS
ERRORS
FINITE ELEMENT METHOD
MEASURING INSTRUMENTS
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
SHIELDS
TEMPERATURE MEASUREMENT
THERMAL ANALYSIS
THERMAL SHIELDS
THERMOCOUPLES
THERMODYNAMIC PROPERTIES