Performance of a typical ice-based cold thermal energy storage system (CTESS) is immensely affected by its supercooling nature and low freezing temperature (0 °C). In this study, 1-Decanol (PCM) was recognised as a potential replacement for ice as it is cost-effective as well as having zero degree of supercooling, and high freezing temperature (5 °C). High thermal conductivity PCM-Expanded graphite (EG) composite (CPCM) was prepared by incorporating the PCM into the porous structure of EG. The thermal conductivity, specific heat, and thermal cycling stability of CPCM were studied. Further, the charging and discharging characteristics of CPCM were investigated in a 64 mm diameter spherical capsule at -3 °C and 13 °C wall temperatures, respectively. CPCM has an incorporation efficiency of 84.99%, and its thermal conductivity is 16.33 times higher than that of PCM. CPCM and PCM have good thermal reliability for 1000 cycles. The freezing temperature of CPCM is ∼4.1 °C higher than that of ice and its charging time is 81.85% lower than that of PCM, which signifies that the chiller operating time can be reduced by 81.85% to store the specified amount of energy in CPCM. Further, the time-averaged charging and discharging rate of CPCM is 5.51 and 5.97 times higher than that of PCM, respectively. Experimental results concede that CPCM is having high freezing temperature (∼4.1 °C), zero degree of supercooling and enhanced energy storage characteristics, which ensure that the utilisation of CPCM paves the way for efficiently storing and recovering the energy.

典型的基于冰的冷热能存储系统（CTESS）的性能受其过冷特性和较低的冷冻温度（0°C）极大地影响。在这项研究中，1-癸醇（PCM）被认为是冰的潜在替代品，因为它具有成本效益，过冷度为零且冷冻温度高（5°C）。通过将PCM掺入EG的多孔结构中来制备高导热率PCM膨胀石墨（EG）复合材料（CPCM）。研究了CPCM的热导率，比热和热循环稳定性。此外，在壁温为-3°C和13°C的情况下，分别在直径为64 mm的球形胶囊中研究了CPCM的充电和放电特性。CPCM的掺入效率为84.99％，导热系数为16。比PCM高33倍。CPCM和PCM在1000个周期内具有良好的热可靠性。CPCM的冷冻温度比冰的冷冻温度高约4.1°C，其充电时间比PCM的冷冻时间低81.85％，这意味着可以将冷却器的运行时间减少81.85％，以在CPCM中存储指定量的能量。此外，CPCM的时间平均充电和放电速率分别是PCM的5.51倍和5.97倍。实验结果表明，CPCM具有较高的冻结温度（〜4.1°C），过零度和增强的能量存储特性，这确保了CPCM的利用为有效地存储和回收能量铺平了道路。比冰高1°C，充电时间比PCM低81.85％，这意味着可以将冷却器的运行时间减少81.85％，以在CPCM中存储指定量的能量。此外，CPCM的时间平均充电和放电速率分别是PCM的5.51倍和5.97倍。实验结果表明，CPCM具有较高的冻结温度（〜4.1°C），过零度和增强的能量存储特性，这确保了CPCM的利用为有效地存储和回收能量铺平了道路。比冰高1°C，充电时间比PCM低81.85％，这意味着可以将冷却器的运行时间减少81.85％，以在CPCM中存储指定量的能量。此外，CPCM的时间平均充电和放电速率分别是PCM的5.51倍和5.97倍。实验结果表明，CPCM具有较高的冻结温度（〜4.1°C），过零度和增强的能量存储特性，这确保了CPCM的利用为有效地存储和回收能量铺平了道路。CPCM的时间平均充电和放电速率分别是PCM的5.51倍和5.97倍。实验结果表明，CPCM具有较高的冻结温度（〜4.1°C），过零度和增强的能量存储特性，这确保了CPCM的利用为有效地存储和回收能量铺平了道路。CPCM的时间平均充电和放电速率分别是PCM的5.51倍和5.97倍。实验结果表明，CPCM具有较高的冻结温度（〜4.1°C），过零度和增强的能量存储特性，这确保了CPCM的利用为有效地存储和回收能量铺平了道路。