Phase changing substances (PCM) have many use areas. One of the important areas of use is to increase the thermal retention capacity of building components. The use of PCM in building components increases the thermal retention capacity of the building elements. Researches are carried out on the thermal retention capacities of PCMs to store energy in building components and to ensure building temperature control. The use of PCM in building components has become an important tool for energy saving, since ensuring building temperature control in summer and winter conditions is a situation that requires continuity. This feature provided to the building component provides an improvement in the energy identity of the building. In general researches, the use of macro, micro and nano encapsulated PCM decreases the heat conduction coefficient as it increases the thermal retention capacity of the building components, but decreases the strength as an undesirable situation. However, when the capsule size used in micro capsule applications is reduced to 7 microns and below, it is seen that the strength increases, while the thermal conductivity coefficient continues to decrease. When the PCM capsule particle sizes used in the building components are reduced, it provides an improvement in the granulometry of the component, so a positive effect on strength is seen in the building components. As a result, if the strength in the building component increases or decreases, the thermal conductivity decreases because the increase in the PCM ratio increases the thermal retention capacity of the building component.
Anahtar Kelimeler: Phase change material, Compression strength, Thermal conductivity, Encapsulation size, Cement-based material
|
