Thermal Modeling of high power LED modules

TL;DR

This paper investigates the accuracy of thermal modeling for high power LED modules, emphasizing the importance of correct physical assumptions and validating CFD models with measurements across different conditions.

Contribution

It introduces a calibration and validation approach for CFD thermal models of high power LED modules using experimental measurements.

Findings

Calibration of CFD model with thermal measurements

Validation of model accuracy across various conditions

Highlighting importance of physical assumptions in thermal modeling

Abstract

This paper presents a study of accuracy issues in thermal modeling of high power LED modules on system level. Both physical as well as numerical accuracy issues are addressed. Incorrect physical assumptions may result in seemingly correct, but erroneous results. It is therefore important to motivate the underlying key physical assumptions of a thermal model. In this paper thermal measurements are used to calibrate a computational fluid dynamics (CFD) model of a high power LED module model at a reference application condition, and to validate it at other application conditions.