Bio-based materials have strong hygrothermal behavior and phase change materials (PCMs) have high thermal inertia, but they have usually been studied separately in most research. In this paper, the hygrothermal behavior of a multilayer building envelope integrating hemp lime concrete (HLC) and PCM was investigated at experimental level. The envelope was flanked by a climate chamber and the laboratory ambient to imitate the outdoor and indoor environments, respectively. Four envelope configurations comprising a reference (without PCM) and three configurations with PCM (PCM placed on the outdoor and indoor side, in the middle of the envelope) were considered in order to study the effect of PCM and its position on the hygrothermal behavior of the envelope. The results showed that the PCM had a significant effect on the hygrothermal behavior of HLC, based on the high coupling between temperature and relative humidity. The characteristic time was considered to quantitatively evaluate temperature and relative humidity trends, and their value was increased with the participation of PCM. Moreover, PCM increased the heat store/release capacity linearly with its position. The closer the PCM was to the outdoor, the higher the heat store/release capacity and the lower the heating/cooling load from the envelope to the indoor environment. These phenomena were closely related to the PCM's temperature distribution and its corresponding specific heat capacity. Therefore, due to the envelope's thermal and hygric inertia on the indoor environment and the building's energy saving potential, it was recommended that the PCM be placed close to the outdoor side.

生物基材料具有很强的湿热行为，相变材料 (PCM) 具有较高的热惯性，但在大多数研究中通常将它们分开进行研究。在本文中，在实验水平上研究了集成了大麻石灰混凝土 (HLC) 和 PCM 的多层建筑围护结构的湿热行为。外壳两侧是气候室和实验室环境，分别模拟室外和室内环境。考虑了四种包络配置，包括参考（无 PCM）和三种带有 PCM 的配置（PCM 放置在室外和室内侧，在包络的中间），以研究 PCM 及其位置对湿热行为的影响信封。结果表明，PCM对HLC的湿热行为有显着影响，基于温度和相对湿度之间的高度耦合。特征时间被认为是定量评估温度和相对湿度趋势的，并且它们的值随着PCM的参与而增加。此外，PCM 随其位置线性增加了蓄热/释放能力。PCM 离室外越近，蓄热/释放能力越高，从围护结构到室内环境的加热/制冷负荷越低。这些现象与 PCM 的温度分布及其相应的比热容密切相关。因此，由于围护结构对室内环境的热惯性和湿惯性以及建筑物的节能潜力，建议将 PCM 靠近室外侧放置。