Experimental investigations on the thermal behavior of phase change material (PCM) in ventilated slabs
Experimental investigations on the thermal behavior of phase change material (PCM) in ventilated slabs
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相变材料（PCM）在通风板中热行为的实验研究
DOI：
10.1016/j.applthermaleng.2018.12.032
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发表时间：
2019-02
影响因子：
6.4
通讯作者：
Shuguang Liao
中科院分区：
文献类型：
--
作者：
Xiaoqin Sun;Youhong Chu;Mario A. Medina;Yajing Mo;Siyuan Fan;Shuguang Liao
利用小型风洞对矩形平板中相变材料(PCM)充电过程中的热行为进行了实验研究。一种标称熔融温度范围为26-28 °C的商用石蜡基相变材料被封装在高密度聚乙烯板材中，用于建筑物的储热应用。以熔化时间和能量充填速度为指标，分析了风温、风速和铸坯倾角对铸坯性能的影响。由于自然对流的作用，板坯顶部区域的熔化时间比底部区域缩短了18.8~50.8%。当进风温度从35 °C增加到55 °C时，平均能量充电速度从36.3 W提高到109.4 W，提高了201.7%，而当风速从4 m/S增加到5 m/S时，平均能量充电速度略有增加8.7%，在研究倾角对能量充电过程的影响时应考虑纵横比。当进风温度为55 °C、风速为3 m/S、倾角为90°时，最大储能能力为97.2 W·h，其中含有20.2%的显热，充电速度为109.4 W。
Experiments were conducted using a small wind tunnel to identify the thermal behavior during energy charging processes of phase change material (PCM) in rectangular slabs. A commercially available paraffin-based PCM with a nominal melting temperature range of 26–28 °C was encapsulated in high-density polyethylene (HDPE) slabs for thermal storage applications in buildings. The influence of air temperature and velocity as well as the slab inclination angle was evaluated using melting time and energy charging speed. The melting time was 18.8–50.8% shorter at top zone than it at bottom zone of the slabs because of the natural convection. The average energy charging speed increased from 36.3 W to 109.4 W by 201.7% when the inlet air temperature increased from 35 °C to 55 °C. However, it was slightly enhanced by 8.7% when the air velocity increased from 4 m/s to 5 m/s. The aspect ratio should be considered when studying the impact of inclination angle on energy charging process. The maximum energy storage capacity was 97.2 W·h with a fraction of 20.2% sensible heat with an energy charging speed of 109.4 W when the inlet air temperature was 55 °C, the air velocity was 3 m/s, and the inclination angle was 90°.
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影响因子：
6.4
作者：
Saeid Seddegh;Xiaolin Wang;A. Henderson
通讯作者：
Saeid Seddegh;Xiaolin Wang;A. Henderson
影响因子：
6.7
作者：
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通讯作者：
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DOI：
10.1016/j.icheatmasstransfer.2017.07.023
发表时间：
2017-11
影响因子：
7
作者：
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通讯作者：
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影响因子：
11.2
作者：
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通讯作者：
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影响因子：
8.7
作者：
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通讯作者：
M. Prieto;B. González