Abstract
Thermal energy storage using phase change material (PCM) is needed for renewable power generation using solar energy. In the present investigation, the discrete-ordinate method is used to numerically investigate the radiative transport in a two-dimensional finned cylinder containing an absorbing-emitting PCM. The enthalpy-porosity method is used to track the melting-solidification interface. This study investigated the effects of the optical thickness of the phase change material and the temperature at the outer surface of the finned cylinder on the melting process. The results obtained show that thermal radiation decreases the melting time and accelerates the phase transition process. Besides, the results showed that the use of fins along with a radiation absorber in the PCM decreases the melting time by 65% compared with only fins.
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