Building-based active envelopes play an important role to reduce active heating supplies. Several techniques are developed to enhance the energy performances of active building envelopes; meanwhile, numerous numerical and mathematical models are also developed to conduct the performance analysis of these techniques. In this paper, we propose a state-space model for solar active wall-based Phase Change Materials (PCM). The advantage of this method remains in its simplicity to provide details of internal nodes and input/output parameters. The low-cost calculation is a supplementary advantage versus a heavy numerical method. The proposed numerical model is applied for a multi-layer wall with PCM Wallboards (PCMW) embedded between indoor and outdoor environments. The results show the ability of the state-space model to estimate the thermal behavior of the system, as well as the thermal characteristics of embedding PCM in the internal face of the wall. It significantly contributes to stabilize the indoor temperature and to ensure the thermal comfort.

基于建筑物的活动围护结构在减少活动供热方面起着重要作用。已开发出多种技术来增强活动建筑围护结构的能源性能。同时，还开发了许多数值和数学模型来进行这些技术的性能分析。在本文中，我们提出了基于太阳能活性壁的相变材料（PCM）的状态空间模型。该方法的优势在于其简单性，可提供内部节点和输入/输出参数的详细信息。相对于繁重的数值方法，低成本计算是一种补充优势。所提出的数值模型适用于在室内和室外环境之间嵌入PCM墙板（PCMW）的多层墙。结果表明状态空间模型能够估计系统的热性能，以及将PCM埋入墙体内表面的热特性。它极大地有助于稳定室内温度并确保热舒适性。