Thermal storage system using phase change materials in led...

H - Electricity – 05 – B

Patent

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H05B 37/02 (2006.01) F21S 2/00 (2006.01)

Patent

CA 2716829

A phase change material (PCM) is used for thermal storage for LED-based lighting systems. The PCM is placed in a sealed container in close contact with the LED to be cooled. The PCM is selected such that its melting point temperature is ap-proximately the preferred operating temperature of the LED. When the PCM absorbs heat from the LED as a solid, its temperature rises. However, when the PCM reaches its melting point, the temperature of the PCM stays at its melting point temperature until the phase of the PCM changes completely from a solid to a liquid. Then the PCM continues to rise in temperature. Because a PCM can absorb a large amount of heat during its change of phase from a solid to a liquid, the PCM can store a large amount of heat generated by the LED while maintaining its melting point temperature.

Un matériau à changement de phase (PCM) est utilisé pour un stockage thermique pour des systèmes d'éclairage utilisant des DEL. Le PCM est placé dans un contenant scellé en contact étroit avec la DEL à refroidir. Le PCM est sélectionné de telle sorte que sa température de point de fusion soit approximativement égale à la température de fonctionnement préférée de la DEL. Lorsque le PCM absorbe la chaleur dégagée par la DEL sous un état solide, sa température augmente. Cependant, lorsque le PCM atteint son point de fusion, la température du PCM reste à sa température de point de fusion jusqu'à ce que la phase du PCM change complètement en passant d'un état solide à un état liquide. Ensuite, la température du PCM continue à croître. Étant donné qu'un PCM peut absorber une grande quantité de chaleur au cours de son changement de phase de l'état solide à l'état liquide, le PCM peut stocker une grande quantité de chaleur dégagée par la DEL tout en maintenant sa température de point de fusion.

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