Phase change material Chinese Kang: Design and experimental performance study
2020
Li, Gang | Bi, Xiaoxuan | Feng, Guohui | Chi, Lan | Zheng, Xianfang | Liu, Xueting
The Chinese Kang is indispensable for domestic heating during the winter in the rural residence of northern China. However, it still has certain drawbacks such as the huge surface temperature difference and limited effective heating time. A novel phase change material Chinese Kang (PCMCK) is developed by combining paraffin and the traditional Kang to overcome such disadvantages. A comparison test was conducted to analyze the thermal performance of PCMCK and traditional Kang. According to the data, the coefficient of variation of the PCMCK is significantly lower than that of the traditional Kang during each time period. Thus, the PCMCK surface temperature distribution is much more uniform. Additionally, after the burning ceased, the indoor temperature of a PCMCK-heated room still kept rising until midnight due to the excessive heat absorbed by #48 paraffin. The mean indoor temperature is 2.94 °C higher than that of the traditional Kang-heated room. As a result, the thermal character of phase change material is fully utilized. The PCMCK can effectively improve the indoor thermal comfort, the uniformity of Kang surface temperature and extend the heating period significantly as well.
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