Heatsink Screener

using Makrolon® TC polycarbonate

provided by Covestro LLC

Additional Information
Simulation Information

Design Space

This Heatsink Screener uses two simulation models to predict LED temperatures:
  1. The Makrolon® TC polycarbonate heatsink model uses a dataset based on the Design Space indicated below.

  2. The die-cast aluminum heatsink model uses the same Design Space, but without the aluminum heat-spreader plate.

Input Parameters

Thermal conductivity:
0.5 to 22.5 W/mK
Input power level:
5 to 18 Watts
Number of fins:
3 to 7 fins
Fin height:
5 to 30 mm
Fin spacing:
2.3 to 12.8 mm
Optional heat-spreader thickness:
0 to 3.3 mm
Ambient air temperature:
0 to 90 °C
Heatsink diameter:
63.5 mm (fixed)
Heatsink nominal wall thickness:
3.2 mm (fixed)
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Experimental Correlation

Heatsink Testing Setup
Thermal Image
  • The LED temperature predictions of the Neural Network Model were compared to CFD simulations and experimental test data and were found to correlate well
    (see next tab).

  • Maximum experimental LED temperatures were recorded with thermocouples and validated with thermal imaging.

  • Thermal Conductivity values used to predict LED temperatures were calculated using the in-plane thermal conductivity ASTM measurement method, then increasing the result by 25%.

  • Max Material Temperature used to generate warnings and cut-offs are calculated as 18 °C below the material’s Vicat softening temperature.
Heatsink Screener | using Makrolon® TC polycarbonate      
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Input Parameters
Heatsink body material
(Show TDS - Show SDS)
Input power level (W)
Optional heat-spreader thickness (mm)
Number of fins
Fin height (mm)
Fin spacing (mm)
Ambient air temperature (°C)
LED orientation
For Business Purposes Only
Provided by Covestro LLC
Picture(s): Covestro, 2021

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