In this work, a new design of shell and finned tube latent heat storage system was designed, constructed and tested when it was integrated with the flat plate solar water heater. This design not only provides large heat transfer area between the storage material and the heat transfer fluid, but also it overcomes the problem of low thermal conductivity of paraffin wax (PW) by dividing it into tens of thin slices. Three configurations of storage techniques were proposed; where water, PW as phase change material (PCM) and both water and PW were used as thermal storage materials. The proposed systems were tested at different mass flow rates of heat transfer fluid (0.08–0.16 kg/s). The experimental results showed that the highest daily efficiency of 65% was achieved when the configuration that combines the PCM and water storage tank was used. Moreover, this configuration was capable of providing hot water of temperature ranging from 50 to 60.4 °C through 24 h/day. The results of this configuration showed also that the released energy from PW constitutes 52% of the total stored energy; while the remaining energy of 48% was considered backup stored energy that may help in any sudden thermal loads during night.

在这项工作中，与平板太阳能热水器集成后，设计，建造和测试了一种新的壳翅片管潜热存储系统设计，制造和测试。这种设计不仅在存储材料和传热流体之间提供了较大的传热面积，而且通过将其分成数十个薄片来克服了石蜡（PW）导热系数低的问题。提出了三种存储技术配置；其中水，PW作为相变材料（PCM）以及水和PW都用作储热材料。在不同质量的传热流体流速（0.08-0.16 kg / s）下对建议的系统进行了测试。实验结果表明，使用结合了PCM和储水箱的配置时，日效率最高可达到65％。此外，这种配置能够通过每天24小时提供温度范围为50至60.4°C的热水。此配置的结果还显示，从PW释放的能量占总存储能量的52％；而从PW释放的能量占总能量的52％。而剩余的48％的能量被认为是备用存储能量，可能有助于在夜间产生突然的热负荷。