Ventilated slabs are used to provide indoor comfort by taking advantage of thermal inertia. The underlying difficulty is that the computational cost is high, which is hardly compatible with an exhaustive study of dynamic behaviour at room scale. This paper presents a methodology for obtaining a lumped model based on the identification of the transfer functions for constant airflow rate systems. The transfer functions were combined into a state space model, which is able to obtain the main heat fluxes with good accuracy at a much lower computational cost. The study moved to room scale in order to further understand how a ventilated slab influences the heat balance. Increasing the number of ducts promoted better indoor temperature stability but the impact was slight. The mass flow rate, on the other hand, appeared to be crucial. This result underlines the need to tailor a control law specifically to the ventilated slab.

通风板用于通过利用热惯性来提供室内舒适度。潜在的困难是计算成本高，这与在房间范围内对动态行为的详尽研究很难兼容。本文提出了一种基于恒定气流速率系统传递函数的识别方法来获得集总模型的方法。传递函数被组合到一个状态空间模型中，该模型能够以较低的计算成本以良好的精度获得主要的热通量。为了进一步了解通风板是如何影响热量平衡的，研究移至房间规模。风道数量的增加促进了室内温度稳定性的提高，但影响很小。另一方面，质量流量似乎至关重要。