Light-weight materials are comprehensively used to reduce the building weight in high-rise or super high-rise buildings, but they will reduce building thermal inertia remarkably, which can increase the air-conditioning load fluctuation and reduce indoor thermal comfortable. According to this condition, phase-change material (PCM) is filled to hollow bricks to improve thermal behavior by latent thermal storage. A numerical model with the heat transfer process of melting-solidifying was built, and a full-scale experiment was done to verify this model. Due to the filled PCM, the thermal performance of hollow bricks was improved obviously from experimental and numerical results. Under suitable phase-change temperature, the filled PCM can reduce the attenuation rate from 13.07% to 0.92%–1.93% and increase the delay time from 3.83 h to 8.83h–9.83 h. Meanwhile, the filled PCM can reduce the peak heat flux from 45.26 W/m2 to 19.19 W/m2-21.4 W/m2, but cannot reduce the average value. In addition, inner cavities were the better choice for PCM and there was an extra phase-change extent of close to 90% in favor of the different outdoor thermal environment. Finally, influence rules of latent heat and thermal conductivity coefficient of PCM were analyzed on temperature and heat flux in inner surfaces.

轻质材料被广泛用于减轻高层或超高层建筑的建筑重量，但它们将显着降低建筑物的热惯性，从而增加空调负荷的波动并降低室内的热舒适性。根据此条件，相变材料（PCM）被填充到空心砖中，以通过潜热存储来改善热性能。建立了具有熔融-凝固传热过程的数值模型，并进行了全面的实验以验证该模型。实验和数值结果表明，由于填充了PCM，空心砖的热性能得到了明显改善。在合适的相变温度下，填充的PCM可以将衰减率从13.07％降低到0.92％–1.93％，并将延迟时间从3.83 h增加到8.83h–9.83 h。同时，填充的PCM可以将峰值热通量从45.26 W / m2降低到19.19 W / m2-21.4 W / m2，但不能降低平均值。此外，内腔是PCM的更好选择，并且由于不同的室外热环境，相变程度接近90％。最后，分析了PCM的潜热和导热系数对内表面温度和热通量的影响规律。