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.%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 ex-perimental 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.
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