Open AccessConsiderations on the importance of proper heat transfer coefficient modeling in air cooled electronic systems
Author(s) -
Marcin Janicki,
Agnieszka Samson,
Tomasz Raszkowski,
Tomasz Torzewicz,
Andrzej Napieralski
Publication year - 2018
Publication title -
facta universitatis. series electronics and energetics/facta universitatis. series: electronics and energetics
Language(s) - English
Resource type - Journals
eISSN - 2217-5997
pISSN - 0353-3670
DOI - 10.2298/fuee1804519j
Subject(s) - heat transfer coefficient , heat transfer , thermodynamics , thermal , materials science , natural convection , mechanics , film temperature , heat sink , environmental science , physics , reynolds number , turbulence , nusselt number
This paper illustrates, based on a practical example of a hybrid circuit, the influence of proper heat transfer coefficient modelling in air cooled electronic systems on the accuracy of thermal simulations. This circuit contains a transistor heat source and a set of temperature sensors. The measurements of their temperature responses are taken in natural convection and forced air cooling conditions. The experimental data provide the information necessary to estimate the local heat transfer coefficient values in heat source and temperature sensor locations. Moreover, the experiments rendered possible the fitting of parameters of an empirical heat transfer coefficient model for different surface temperature rise values and cooling air velocities, and hence allowed significant improvement of thermal simulation accuracy.