examination of kno3/diatomite fscpcm analysis in spherical and plate shape at an optimum percentage

Composites of kno3/diatomite with 65/35 wt# %, in plate and spherical shapes, have been developed and tested for thermal energy storage (tes) at high temperatures (300 oc)# the composites for tes were successfully synthesized by impregnation and sintering two-step method# the low-cost binary salt kno3 was chosen as the phase change material and diatomite was as the supporting material# the results showed that this form-stable composite phase change material (fscpcm) has an acceptable chemical compatibility# at first, after impregnating, the composites were pressed at 200 bars with different shapes as plate form and spherical form# the goal of this paper is to testify the duration of phase changing and comparison of the two shapes of both plate and spherical# as a measurement, an ir-camera was used and tested the fscpcm every 12 seconds from 130°c up to 320°c# the phase change temperature in plate mode was at 313°c and in the spherical mode at 316°c# the produced fscpcms are inconvenient phase change temperature range to employ in various applications such as solar energy, building materials and etc#