Experimental assessment on the use of phase change materials (PCMs)-bricks in the exterior wall of a full-scale room
Experimental assessment on the use of phase change materials (PCMs)-bricks in the exterior wall of a full-scale room
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DOI：
10.1016/j.enconman.2016.04.065
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发表时间：
2016-07
影响因子：
10.4
通讯作者：
Xu Wang;Hang Yu;Lu Li;Mei Zhao
中科院分区：
文献类型：
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作者：
Xu Wang;Hang Yu;Lu Li;Mei Zhao
本文旨在评估一种复合相变材料墙（PCM墙）的全年适用性。测试在净尺寸为3.25 m（L）* 3.86 m（W）* 2.91 m（H）的足尺房间中进行了三个季节的测试，并与常规节能墙进行了比较。根据DSC测试进行PCM砖的比热容。并对该建筑的热工性能进行了研究，主要包括夏季和冬季的节能效果，以及减少旺季内墙面温度波动的效果。结果表明，在夏季条件下，PCM壁的最高内壁表面温度降低约0.2 °C，时间延迟约1-2 h，冷负荷降低24.32%。对于旺季的情况下，PCM墙是在相变温度范围内，可以完全抵抗环境的热干扰。此外，还可以有效地减少内墙表面温度的波动。对于冬季的情况下，PCM墙可以减少10-30%的热负荷。此外，对于在白天（8：30-18：30）或夜间（18：00-9：00（第二天））关闭空调的情况，可以实现从内墙表面损失的热的9-72%的减少。综上所述，PCM墙体全年表现出更优异的热性能。
This paper aims to evaluate the year-round applicability of a kind of composite-PCMs wall (PCM-wall). The test was carried out in a full-scale room with a net dimension of 3.25 m (L) ∗ 3.86 m (W) ∗ 2.91 m (H) in three seasons, and comparisons were made with a regular energy-saving wall. Specific thermal capacity of the PCM-bricks was carried out according to DSC tests. Then thermal performance mainly including of energy-saving effect during summer and winter, reduction of interior wall surface temperature fluctuation during midseason was investigated. Results showed a reduction of about 0.2 °C for the maximum interior wall surface temperature, a time delay of about 1–2 h and a reduction of 24.32% of the cooling load for the PCM-wall under summer conditions. For the midseason cases, the PCM-wall was under the phase transition temperature range and could completely resist the ambient thermal disturbance. Besides, fluctuation of the interior wall surface temperature could be effectively reduced. For the winter cases, the PCM-wall could reduce 10–30% of the heating load. Additionally, as for the cases where air-conditioner was off during daytime (8:30–18:30) or nighttime (18:00–9:00 (next day)), a reduction of 9–72% of the heat lost from the interior wall surface could be achieved. To summarize, the PCM-wall performed more excellent thermal behavior all the year round.