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.