Courtyards are an effective passive strategy for improving the energy performance of buildings. However, there is a lack of accurate simulation tools for their thermal performance due to their complex thermodynamics. This paper’s contribution is the coupling of a CFD model with a system of differential equations at the walls, governing surface and inner wall temperatures, providing an accurate computation of courtyard thermal performance. On this basis, boundary conditions for the standard Boussinesq equations governing temperatures, wind velocity, and pressure within the courtyard are established. Modelling results are compared with monitored data in two days of different months in a courtyard in Seville (Spain). Simultaneously, simulations carried out by existing software were performed. Resulting data showed more accuracy than existing tools, with a Root Mean Square Error of 1.19 (August) and 1.59 (October), while the corresponding values with ENVI-met were 3.31-3.4, and with Ladybug Tools 2.59-4.49.

庭院是提高建筑物能源效率的有效被动策略。但是，由于其热力学复杂，因此缺乏精确的热性能仿真工具。本文的贡献在于将CFD模型与墙壁上的微分方程系统耦合，控制表面和内壁温度，从而提供了庭院热性能的精确计算。在此基础上，建立了用于控制庭院中温度，风速和压力的标准Boussinesq方程的边界条件。在塞维利亚（西班牙）的一个院子里，将建模结果与不同月份的两天内的监测数据进行比较。同时，执行由现有软件执行的模拟。所得数据显示出比现有工具更高的准确性，