Energy storage, particularly thermal energy, is one of the most important issues in responding to human energy needs. In this numerical work, by using the latent heat of the organic paraffin RT26 and its melting and freezing points, an attempt has been made to study thermal and heat energy storage. In this theory, by analyzing different circular and elliptical shapes of heat exchangers and internal tubes, an attempt has been made to increase the thermal efficiency and deal with the slow rate of completing the process, which is mainly based on buoyancy. In this work, by employing MWCNT and GO, it has been tried to increase the thermal conductivity of organic material. The results also show that increasing the eccentricity of the condenser in the melting process causes a thermal equilibrium to be created in heat exchanger area in such a way that by increasing the eccentricity from 0.02 to 0.04, and 0.06, the percentage of heat efficiency of heat exchanger will increase by 27%, 49% and 58%, respectively. It was also found that by reducing the cold wall temperature from 280 K to 270 K, the solidification process is accelerated so that the time required to complete the process is reduced by 17%.

能量储存，尤其是热能，是满足人类能源需求的最重要问题之一。在这项数值工作中，利用有机石蜡 RT26 的潜热及其熔点和凝固点，尝试研究热能和热能的存储。该理论通过分析换热器和内管的不同圆形和椭圆形，尝试提高热效率，解决主要基于浮力的过程完成速度慢的问题。在这项工作中，通过使用 MWCNT 和 GO，尝试增加有机材料的热导率。结果还表明，在熔化过程中增加冷凝器的偏心会导致在换热器区域建立热平衡，通过将偏心从 0.02 增加到 0.04 和 0.06，热效率百分比交换器将分别增加 27%、49% 和 58%。还发现通过将冷壁温度从 280 K 降低到 270 K，可以加速凝固过程，从而使完成该过程所需的时间减少 17%。