Mirko Javurek, Andreas Mittermair,
"Surface Heat Transfer Coefficient Measurement by Immersed Temperature Sensor and Inverse Modelling"
, in Bernhard Zagar: 5. Tagung Innovation Messtechnik, Vol. 5, Seite(n) 65-70, 2017, ISBN: 978-3-8440-5163-6
Surface Heat Transfer Coefficient Measurement by Immersed Temperature Sensor and Inverse Modelling
Sprache des Titels:
5. Tagung Innovation Messtechnik
A transient surface heating or cooling process of a solid is considered. A procedure for the determination of surface temperature and surface heat flux density during such a process is presented using a submersed temperature sensor in the solid. From this measured temperature the surface temperature and surface heat flux density are calculated by inverse process modelling. This method is prone to errors since measurement errors are amplified in the inverse process modelling and can thus easily become unacceptably large. The LSQR regularisation algorithm is applied to the inverse problem solution. The proposed method allows to simulate an experimental setup and to determine the accuracy of the results gained from the simulated experiment. This is essential for the determination of the accuracy of a planned or existing test facility. The influence of process parameters like sensor depth, sensor noise level, sampling rate, heat flux density amplitude and cooling/heating process duration is investigated.