A preliminary experimental study of a novel incorporation of chilled ceiling with phase change materials and transparent membrane cover
A preliminary experimental study of a novel incorporation of chilled ceiling with phase change materials and transparent membrane cover
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相变材料与透明膜罩新型冷天花板的初步实验研究
DOI：
10.1093/ijlct/ctab104
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发表时间：
2022
影响因子：
2.3
通讯作者：
Riffat J
中科院分区：
文献类型：
--
作者：
Riffat J
本研究提出了一种新型的相变材料（PCM）与透明膜覆盖的冷却天花板，形成一种新型的PCM冷却天花板面板的实验研究。膜盖是红外透明的，以促进辐射冷却，但作为对流的屏障，以避免在潮湿气候地区的应用中的水分冷凝。由于数百万人仍然无法获得可靠的电力供应，特别是在撒哈拉以南和南亚国家，这些国家还面临着制冷需求高和电力供应不足的综合问题，使用太阳能将有助于克服这些问题。为了解决这些问题，所提出的PCM冷却天花板可以与太阳能光伏（PV）直接驱动的蒸汽压缩冷却系统一起沿着应用。光伏（PV）板产生的电力驱动变速直流（DC）压缩机进行制冷生产，而过量的制冷量则存储在PCM包中供夜间使用。变速压缩机可以调节以匹配太阳辐射的波动，从而提高太阳能的利用率。使用小型DC压缩机制冷系统制备小规模实验装置。分别在冷却梁和冷却吊顶中集成水合物型相变材料，并在冷却吊顶中应用透明膜覆盖物，以验证所提出的设计。
This study presents an experimental investigation into a novel incorporation of chilled ceiling with transparent membrane cover and phase-change material (PCM) to form a new type of PCM chilled ceiling panel. The membrane cover is infrared transparent to facilitate radiant cooling, but serves as a barrier of convection to avoid moisture condensation for applications in humid climate regions. As reliable electricity supply is still not accessible to millions of people, especially in sub-Saharan and South Asian countries where these countries also face the combined problems of high cooling demand and inadequate power supply, the use of solar energy would help to overcome these problems. To address such problems, the proposed PCM chilled ceiling can be applied along with a solar photovoltaic (PV) directly driven vapour-compression cooling system. Electricity generated by the photovoltaic (PV) panels drives the variable speed direct current (DC) compressor for cooling production, while excessive cooling is stored in the PCM packs for use at night. The variable speed compressor can adjust to match fluctuation in solar radiation and hence increases the utilization of solar energy. A small-scale experimental setup was prepared using a mini DC compressor refrigeration system. Integration of salt hydrate type PCM in chilled beam and chilled ceiling, respectively, and application of transparent membrane cover in chilled ceiling were tested to verify the proposed design.