Improved static and transient thermal management of handsets using heat spreaders and phase change material (PCMS)

摘要

Improved steady-state (static) thermal management (STM) and transient thermal management (TTM) of an acrylonitrile-butadiene-styrene (ABS) handset mock-up is accomplished by using Phase Change Material (PCM) coupled with metal heat spreaders or graphite loaded polymer (GLP) housing. Power is supplied to the handset mock-ups by a heater that simulates a power amplifier (PA). At fixed intervals of time, thermal images of the handset housing are obtained using an infrared camera while thermocouples record the temperature of the PCM and heater. Transient natural convective and radiative heat transfer rates from the handset to the environment are calculated from the thermal images. Guidelines for designing thermal management systems for portable consumer electronics are developed from the results presented.