Lamp Heat Dissipation Development

There have been two major problems that have plagued the development of LED lamps: one is cost, and the other is heat dissipation. The heat dissipation capability ,not only affects the light efficiency of the lamp, but also relates to the reliability of the luminaire. Therefore, it can be said that ,the radiator is a key component in the LED lamp. And its shape, volume, and heat dissipation area must be considered. The size of the heat sink , and the operating temperature of the LED, can affect the luminous efficiency and lifetime. The design of the heat sink includes the following parts:

1. Defining the power that LED lamps need to dissipate heat. Some parameters to be used in designing the heat sink, are the specific heat ,thermal conductivity of the metal, the thermal resistance of the chip, the thermal resistance of the heat sink, and the thermal resistance of the surrounding environment.

2. Determine the heat dissipation method, determine the maximum operating temperature allowed for the LED fixture, calculate the volume and heat dissipation area of the heat sink, and determine the shape of the heat sink.

3. Combine the heat sink with the LED light into a complete lamp , and verify that it meets relevant standards and regulations.


Lampviews products use a heat dissipation simulation program, the ICEPAK, to evaluate heat sink design and analyze suitability of materials to maintain LED Tc<65℃

 


To test the performance of heat dissipation, the temperature is measured at room, and evaluated through comparing data of Heat-Fluid structural simulations.

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