A latent thermal energy storage system designed for domestic hot water is constructed using microencapsulated phase change material (MEPCM) as the energy storage medium. The temperature response and energy storage are experimentally investigated for different MEPCM particle fractions, PCM core fractions and carbon fiber fractions in the energy storage units (ESUs). A model for nominal energy storage is proposed. In the charging process, the ESU experiences three stages: the sensible heat stage before melting, the melting stage, and the sensible heat stage after melting. The ESU shows a high temperature uniformity in circumferential and axial directions. The temperature difference in the two directions is within 5 °C. A higher MEPCM particle fraction and higher PCM core fraction indicate a higher total PCM content, which results in higher energy storage capacity but slows down the energy storage rate. Carbon fiber fraction with a 10% variation shows a mild influence on temperature response and energy storage. In the consecutive alternate charging and discharging experiments, the latent heat of the PCM can be fully utilized and the system has a nearly constant energy storage/release rate. The stable operation and the high heat transfer rate of the system demonstrates that it is practical in the application for domestic hot water.

使用微囊化相变材料（MEPCM）作为储能介质，构造了用于生活热水的潜热储能系统。对能量存储单元（ESU）中不同的MEPCM颗粒部分，PCM核心部分和碳纤维部分的温度响应和能量存储进行了实验研究。提出了名义储能模型。在充电过程中，ESU经历三个阶段：融化前的显热阶段，融化阶段和融化后的显热阶段。ESU在圆周和轴向上显示出高温均匀性。两个方向的温差在5°C以内。较高的MEPCM颗粒分数和较高的PCM核心分数表示较高的总PCM含量，这会导致更高的能量存储容量，但会降低能量存储速率。碳纤维含量变化10％时，对温度响应和能量存储影响较小。在连续的交替充电和放电实验中，PCM的潜热可以被充分利用，并且系统具有几乎恒定的能量存储/释放速率。该系统运行稳定，传热率高，证明了在生活热水中的实用性。PCM的潜热可以得到充分利用，并且系统具有几乎恒定的能量存储/释放速率。该系统运行稳定，传热率高，证明了在生活热水中的实用性。PCM的潜热可以得到充分利用，并且系统具有几乎恒定的能量存储/释放速率。该系统运行稳定，传热率高，证明了在生活热水中的实用性。