Cooling of Led Modules with Thermal Accumulators Based on Phase Change Materials
DOI:
https://doi.org/10.63527/1607-8829-2026-1-67-75Keywords:
LED module, luminous flux, thermal accumulator, phase change materials, thermal resistance, thermal stabilization, enthalpyAbstract
The purpose of this study is to design and develop a silent, passive cooling system based on phase change materials capable of maintaining the temperature of LED arrays within an optimal range for extended periods. The system operating principle utilizes the latent heat of fusion of the working substance and allows for the temperature of the semiconductor light source to be precisely fixed. The main condition for its normal functioning is that the melting point of the working substance does not exceed the maximum permissible temperature of the LED element. Depending on the maximum permissible temperature of the cooled elements, wax, paraffin, salt hydrates, etc. can be used as working substances. A disadvantage of phase change materials is their high thermal resistance, which hinders rapid charging and discharging of the thermal accumulator. To reduce the overall thermal resistance of the working substance, the thermal accumulator uses a modular design, in which the accumulator consists of several modules filled with phase change materials with different melting points. The defining feature of a temperature stabilization system is the constant temperature of the working substance during the melting process, which results in a constant temperature of the LED array active area. Thermal stabilization systems based on thermal accumulators offer a significant advantage: they are autonomous and independent of changing external conditions.
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