| 摘要: |
| 本文采用熔融共混法制备十四酸（MA）-十六醇（HD）二元有机复合相变材料，利用差示扫描量热仪（DSC）确定了复合相变材料的相变温度和相变潜热。相变温度为35.5 ℃，相变潜热为218.23 kJ/kg，经过300次热循环实验，结晶温度变化在0.2 ℃以内，热稳定性良好。利用高低温交变试验箱模拟夏季室外温度变化（变化范围18~58 ℃），测试了双层窗与相变窗内外表面温度随环境温度的变化特性。结果表明：相变窗外表面温度峰值较双层窗降低5.9 ℃，相变窗内表面温度峰值较普通双层窗降低0.6 ℃，温度持续稳定100 min，整个测试过程中相变窗控温效果明显。相变窗较双层窗具有良好的负荷转移能力。 |
| 关键词: 相变材料 相变窗 热负荷 实验工况 传热 |
| DOI： |
| 投稿时间：2017-06-26
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| 基金项目:江苏省自然科学基金项目(BK2012602)，苏州科技大学研究生创新项目(SKCX15_029)资助。 |
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| Experimental Study on Heat Transfer of PCM-filled Window |
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| Abstract: |
| Two kinds of binary composite phase change materials (PCMs) were prepared using a melt blending method with myristic acid (MA) and cetyl alcohol (HD) as the raw materials. The eutectic temperature and latent heat in phase change were tested using DSC, and they are 35.5 ℃ and 218.23 kJ/kg, respectively. After 300 thermal cycles applied during the experiment, the results show that the MA-HD eutectic temperature in phase change undergoes a change of less than 0.2 ℃. This indicates that the thermal stability of the MA-HD binary composite phase change material is good. A high-low temperature box within a temperature range of 18–58 ℃ was used to simulate the outdoor temperature during the summer. The temperature response for a PCM-filled window and a hollow window was tested. The experimental results show that the temperatures of the outer and inner surface of PCM-filled window are 5.9 ℃ and 0.6 ℃ lower than those of a hollow window, respectively. The surface temperatures of the PCM-filled window remain constant for 100 min, and the effects of the temperature control are good, which shows that the PCM-filled window has a good load transfer capability. |
| Key words: phase change materials PCM-filled window heat load test conditions heat transfer |
