Numerical simulation of heat-storage performance of filling body with uniformly mixed phase-change paraffin

A phase-change material was added to filling materials in an appropriate proportion realize the effective collection and storage of geothermal energy. Based on theory heat transfer similarity, heat-storage performance body numerically simulated different states; then, influences paraffin proportion, initial temperature body, surrounding rock temperature, stope airflow velocity behavior were analyzed. The results revealed that reducing increasing all effectively increased capacity body; which influence more significant. at end 16 h period, when reduced from 24?C 18?C, without with 5 % decreased by 2.85 ? 103 kJ 2.40 kJ, respectively. When 35?C 45?C, amount stored two bodies 3.89 4.51