Français
4. Heat dissipation measurement systems
4.1 Method principle
A heating element dissipates its energy differently depending on the nature or phase of the medium in which it is immersed, as the surface heat transfer coefficient is not the same. In the case of a solid-liquid interface, the latter is relatively good. It includes transfers by conduction and natural convection (calm medium), or by forced convection (stirring, agitation). The solid-gas and solid-vapor transfer coefficients, on the other hand, are much poorer.
When a given amount of energy is injected into a probe, for example by passing a current of known intensity through a given resistor, the probe's temperature will rise relative to the medium as the latter becomes more difficult to dissipate the heat produced, particularly when the...
The Ultimate Scientific and Technical Reference
This article is included in
Physical measurements
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Heat dissipation measurement systems
Conclusion
Bibliography
Works
Websites
Online course on level measurement using radar technology :
https://academy-online.krohne.com/elearning/fr/cours/mesure-de-niveau-radar/
Engineer's Garage: level sensors :
...Standards and norms
- Tanks for transporting hazardous materials – Tank service equipment – Fill limiters for liquid petroleum fuels. - NF EN 13922 - 2011
- Pressure resistant oblong sight glasses of borosilicate glass without limitation in the...
The catalog of Iso and Afnor standards can be consulted online on the Afnor website: http://www.afnor.fr
Regulations
Arrêté du 8 juillet 2003 relatif au contrôle métrologique des récipients-mesures. NOR: INDI0301736A
Decision no. 09.00.110.003.1 of October 21, 2009 relating to calibration resources in the field of static and dynamic liquid measurement.
Arrêté du 24 mars 2009 relatif aux jaugeurs. NOR: ECEI0906617A
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
ABB :
Endress & Hauser :
Krohne:
The Ultimate Scientific and Technical Reference
