Abstract: It uses the schematic graph of thermal cycles’ test setting and reseaches the changes in thermal properties of Al-Si alloy under different thermal cycles.The results show that the phase temperature of Al-Si alloy increases from 579℃to 584℃,and the latent heat decreases from 537 J/g to 500.6 J/g after 1 600 thermal cycles’ test setting.Al-Si alloy as phase change storage materials has a excellent reliability of thermal cycles in the long tem,so it can be used for depositing heat of the solar ther...

Key words: solar thermal power generation； phase change heat storage materials of metal； Al-Si alloy； latent heat；