Fig. 6
From: A numerical framework for an electrically-charged PCM brick to reduce winter peak heating demand


Temperature distribution contours within the PCM-brick for the Tₘᵢₙ = − 10 °C scenario. The left column shows the unheated case (P = 0 W/m2), while the right column shows the heated case (P = 200 W/m2) at corresponding times of day (from top to bottom: early charging, peak charge, and discharging phase).