Experimental set up for the investigation of partial phase changes of phase change materials

Thermal energy storage with phase change materials (PCMs) has attracted a lot of attention in the last several decades. Most PCMs do not at constant temperature but rather certain range. It means that PCM need to transit through its range fully from solid state liquid and vice-versa. The situation, which transition begins and/or ends within (in mushy zone), is usually called partial (or change). transitions occur quite often real-life thermal systems PCMs; especially when wide behavior during poorly understood moment, because experimental techniques used for characterization (such as differential scanning calorimetry – DSC) are difficult apply study transitions. lack knowledge this area influences accuracy simulation models. main goal investigations, described paper, was obtain data development model changes. set up investigation changes been proposed, assembled, pilot measurements have conducted. consists two water tanks (that can be maintained different temperatures), water-PCM concentric tube type heat exchanger acquisition system. flows central while located annular space exchanger. tanks, temperatures PCM, allow investigations cycles consisting