Investigation of the mesh Analysis Approaches in the Preparation of Macro Encapsulated Phase Change Materials for High Temperature Energy Storage Systems

Capsulated phase change materials (CPCM) are interesting high energy density solutions to store thermal energy, though there has been little investigation for CPCMs at high temperature. The aim is to create a CPCM with high durability in high temperature with capsuling the PCM. The capsulation can be made by physical or chemical methods. CPCM actually carries out thermal energy storage during melting. The encapsulation of the material prevents its immersion in the environment.KNO3 served as the phase change material (PCM) for thermal energy storage, while diatomite acted as the carrier matrix to provide the structural strength and prevent the leakage of PCM. It was found that KNO3 could be retained 65 wt. % into pores and on surfaces of diatomite without the leakage of melted KNO3 from the SS-CPCM. The green circular sheet with the diameter of 26 mm and the height of 4.5 mm was obtained at 45 MPa via a hydraulic machine.Based on what has been reported by various researchers, by changing the meshes we could find the best usage of mesh point for building a KNO3/diatomite PCM with 65 wt. % of KNO3.In this study KNO3/diatomite PCM with 65 wt.% of KNO3 was chosen by the article and the effect of different type of meshes such as 50, 80, 100 mesh, and not using any meshes for preparation of diatomite on the 15 mm pellet with the width 5mm was seen with an Infrared camera.Figure 1 clearly shows the performance of a CPCM of the synthesized material when the temperature rises. In this graph, the vertical axis represents variations in temperature and the horizontal axis represents time differences. It is observed that when the temperature increases in the near-melting area, the behavior of the material changes.This behavior coincides with the detectable changes in the gradient of the graph. Entering this area with a different slope means starting the energy storage of the material by matter. In this paper, the effect of particle size using mesh coating on the ability to store energy at high temperatures has been investigated. It has also been found that a mesh size of 50 has the most ability to store energy in CPCM.