Thermal Simulation of LED- Powered Luminaire With Coupled Electrical Circuit Analysis
Introductions Pier Angelo Favarelo Zumtobel Ruben Bons Director, Electronics
LED Context
The LED Thermal-Electrical Challenge
The LED Thermal-Electrical Challenge
The LED Thermal-Electrical Challenge
The LED Thermal-Electrical Challenge
The LED Thermal-Electrical Challenge LED in series LED in parallel
The Core Problem for LED Simulation I f , V f , Efficiency → Q Electrical Flow/Thermal simulation: simulation: ngspice STAR-CCM+ LED temperature
LED Luminaire: Test Configuration
LED Luminaire: STAR-CCM+ Model
LED Luminaire: STAR-CCM+ Model
STAR-CCM+ Model Overview Flow Thermal – Modeled as a luminaire attached – Ambient air temperature = 298 K (24.85 ° C). to an aluminum bar (heat sink) and sitting on a wood block. – LED heat dissipation is calculated – In a box (270 mm x 190 mm) with by ngspice (as a fraction of I f * V f ). the ends open to the ambient – Laminar Mesh – Natural convection (air using the – Conformal polyhedral ideal gas law) – Utilized extrusions at the walls. – Steady-state – Segregated flow & energy solvers Solver settings – ½ symmetry model used – Segregated flow & energy – Under-relaxation • Fluid energy UR = 0.99 • Solid energy UR = 0.9999
STAR-CCM+ Model: Mesh
STAR-CCM+ Model: Mesh
Video Demonstration: Coupled Simulation Process
STAR-CCM+ Model: Sample Results
STAR-CCM+ Model: Sample Results
STAR-CCM+ Model: Sample Results
STAR-CCM+ Model: Sample Results
Thank You! ruben.bons@cd-adapco.com +1 (760) 536-8122
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