Full-scale investigation of the dynamic heat storage of concrete decks with PCM and enhanced heat transfer surface area

The paper presents the full-scale experimental investigation of the dynamic heat storage potential of the prefabricated hollow core deck elements with and without phase change material (PCM) and with and without increased bottom surface area of the decks.In the presented investigation five types of hollow core decks with different surfaces on the bottom are investigated: reference deck made of standard concrete and flat surface, deck with special mortar grooved tiles, deck with flat mortar tiles, deck with grooved mortar and phase change material tiles, deck with flat mortar and phase change material tiles.The experimental investigation presented in the paper is performed in the specially designed modified hot box apparatus that allows maintaining periodic steady-state tests with the full-scale concrete deck elements. The presented research investigates if the extended surface area and PCM can result in the increased heat amount that can be transferred and stored in the heavy construction element during the diurnal indoor temperature fluctuations.

► Passive potential for heat storage in the concrete deck with microencapsulated phase change material.
► Heat transfer enhancement due to extended surface area.
► Full-scale experimental measurements of dynamic heat storage capacity.
► Experimental determination of thermal properties of concrete, mortar and PCM mortar.