Thermoelectric characterization for 1 h produce 24, 13 and 45 cycles for palm wax, soy wax and paraffin wax, respectively. Thermoelectric as a thermal cycle test device and the addition of the test module to 4 modules can increase the test efficiency. The Differential Scanning Calorimetry (DSC) results show that the lowest melting and freezing points are owned by soy wax at 43.92 ☌ and 38.49 ☌, respectively. All the natural wax have chemical compositions (C and O) and morphological form are lump layer. The PCM used in this study is consisted of 3 types that derived from natural waxes, namely palm wax, soy wax and paraffin wax. The development of thermal cycle test method to test the thermal stability of PCM has been carried out in this study by using thermoelectric as a heating and cooling media with the number of cycles, namely 500, 1000, 30. The purpose of this study is to analyze the characteristics and thermal stability of PCM using the thermal cycle testing. The stability of the type of Phase Change Material (PCM) during operation are important factors to know before PCM applied.
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