Department of Architecture and Architectural Engineering, Yonsei University, Seoul 03722, Republic of Korea.
Korea Biochar Research Center, Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea.
Environ Res. 2019 May;172:637-648. doi: 10.1016/j.envres.2019.01.058. Epub 2019 Feb 1.
One approach to enhance the energy efficiency of buildings is the integration of construction materials of latent heat storage biocomposites, which are prepared by vacuum impregnating the phase change material into biochar. Biochar is used because it is highly utilized and environmentally-friendly, and the selected phase change materials are fatty acid type which are bio-based material and have a low risk of depletion. Experimental results showed that latent heat storage biocomposite possesses excellent exudation and thermal stability as characterized by 0.1727 W/mK of thermal conductivity comparable to that for a gypsum board, and good chemical compatibility as its amount of latent heat tends to decrease as compared with that of pure phase change material. Results of the numerical analysis showed further that latent heat storage biocomposite efficiently reduced the maximum energy consumption of reference building models by 531.31 kWh per year. Thus, both results validate the claim that latent heat storage biocomposite is a promising building material.
一种提高建筑物能源效率的方法是整合具有潜热存储功能的生物复合材料建筑材料，这是通过将相变材料真空注入生物炭来制备的。之所以使用生物炭，是因为它的利用率高且环保，而所选的相变材料是脂肪酸型的，属于生物基材料，枯竭的风险低。实验结果表明，潜热存储生物复合材料具有出色的渗出性和热稳定性，其导热系数为 0.1727 W/mK，可与石膏板相媲美，并且具有良好的化学兼容性，因为其潜热含量与纯相变材料相比有所减少。数值分析的结果进一步表明，潜热存储生物复合材料每年可使参考建筑模型的最大能耗有效降低 531.31 kWh。因此，这两个结果都证明了潜热存储生物复合材料是一种很有前途的建筑材料。
