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首页> 外文期刊>Applied Energy >Energy saving performance assessment and lessons learned from the operation of an active phase change materials system in a multi-storey building in Melbourne
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Energy saving performance assessment and lessons learned from the operation of an active phase change materials system in a multi-storey building in Melbourne

机译：墨尔本多层建筑中主动相变材料系统运行的节能效果评估和经验教训

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While the energy saving performance of an active phase change materials (PCMs) system in buildings has been widely investigated using prototype-scale experiments and numerical assessments, their performance during the operational phase of a real building has been less understood. This study assessed the energy-saving performance of an active PCM system installed in an eleven storey building in Melbourne. Macro-encapsulated PCM with the phase transition temperature of 15 degrees C was installed in a large PCM tank. Water was used as the heat transfer fluid (HTF) to extract and store cooling energy from the PCM tank. The performance of the active PCM system was monitored for 25 consecutive months, and the results were analyzed on a seasonal basis. Building design documents and the maintenance manuals were studied to understand the difference between design intent and actual operation. The analyzed results revealed that the active PCM system reduced cooling load on the chiller by 12-37% only during colder months, but, remained dormant during the summer. Even in the case of maximum effectiveness, the PCM tank only utilized 15% of its available heat storage capacity to reduce the cooling load. The factors that contributed to the underperformance of active PCM system include mismatch between designed and actual operation of the PCM system, inefficient operation logic of the system, poor material quality, and limited knowledge of maintenance staffs during the operation stage. The lessons learned from the operation of this active PCM system in this multi-storey building were reported and discussed.
机译：尽管已使用原型规模的实验和数值评估对建筑物中的主动相变材料（PCM）系统的节能性能进行了广泛研究，但人们对它们在实际建筑物运行阶段的性能却知之甚少。这项研究评估了安装在墨尔本一栋11层建筑中的有源PCM系统的节能性能。将相变温度为15摄氏度的宏观封装PCM安装在大型PCM储罐中。水被用作传热流体（HTF），以从PCM储罐中提取和存储冷却能。连续25个月对活动PCM系统的性能进行了监视，并按季节对结果进行了分析。研究了建筑设计文件和维护手册，以了解设计意图与实际操作之间的区别。分析结果表明，主动式PCM系统仅在较冷的月份将冷水机的冷却负荷降低了12-37％，但在夏季保持休眠状态。即使在最大效率的情况下，PCM油箱也仅利用其可用储热能力的15％来减少冷却负荷。导致有源PCM系统性能不佳的因素包括PCM系统的设计操作与实际操作之间的不匹配，系统的操作逻辑效率低下，材料质量差以及操作阶段维护人员的知识有限。报告并讨论了从此主动式PCM系统在多层建筑中的操作中汲取的经验教训。

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