Numerical study of a Phase Change Material (PCM) embedded solar thermal energy operated cool store: A feasibility study
Numerical study of a Phase Change Material (PCM) embedded solar thermal energy operated cool store: A feasibility study
复制标题
DOI：
10.1016/j.ijrefrig.2020.04.028
复制
发表时间：
2020-09
期刊：
影响因子：
--
通讯作者：
Pooria Pirdavari;S. Hossainpour
中科院分区：
文献类型：
--
作者：
Pooria Pirdavari;S. Hossainpour
太阳能已被证明是化石燃料的理想替代品，但由于其可获得性的间歇性，太阳能系统面临着严重的限制。在这项研究中，开发了一个简化的动态模型来研究嵌入PCM的冷库的行为。这种类型的冷库的主要应用是与太阳能热制冷系统一起运行，以补偿能源供应的间歇性。8640公斤的农作物(土豆)被认为与PCM冷热能储存单元一起储存在冷库内。根据太阳能利用率数据，考虑了制冷系统24小时运行的活跃期为9小时，非活跃期为15小时。在活跃期，PCM单元充电，在非活跃期，它们放电并调节冷库内的温度。结果表明，通过选择合适的特性，PCM可以在制冷系统的非活跃期将作物的温度保持在所需的范围内。此外，还观察到相变材料的用量和相变温度对系统的性能有显著影响。在制冷系统非活跃期，农作物的最低温度是相变温度为9°C、相变温度为9℃时，相变温度为0.026的情况下，排气过程在制冷的非活跃期结束。
Solar energy has proved to be an ideal alternative for fossil fuels, however, due to its intermittency in availability, systems operated by solar energy face serious limitations. In this study, a simplified dynamic model is developed to investigate the behavior of a PCM-embedded cool store. The main application of this type of cool store is to be operated with a solar thermal refrigeration system to compensate for the intermittency in energy availability. 8640 kg of crops (potatoes) is considered to be stored inside the cool store along with PCM cold thermal energy storage units. 9 h of active and 15 h of inactive period are considered for 24 h operation of the refrigeration system based on the solar energy availability data. During the active period, PCM units charge, and during the inactive period, they discharge and regulate the temperature inside the cool store. It was revealed that by choosing the right properties, PCM can keep the temperature of the crops in the desired range during the inactive period of the refrigeration system. Also, it was observed that the amount of PCM used and the phase change temperature of the PCM has a significant impact on the performance of the system. The lowest temperature obtained for the crops during the inactive period of the refrigeration system is for the case with PCM to crops amount ratio of 0.026 with PCM phase change temperature of 9 °C in which the discharge process finishes around the end of the inactive period of the refrigeration.