For example, sodium sulfate decahydrate, Na 2 SO 4 ·10H 2 O (SSD), has been identified as one of the most promising salt hydrates for building applications due to its low cost (1.60 $/kWh), high energy storage capacity (254 J/g), and moderate melting temperature (32.4 °C) [20,21]. Nonetheless, the widespread use of SSD as a PCM has …