This paper presents a numerical simulation of a ventilated roof based on a novel plastic support especially designed to reduce the solar heat gains by improving the airflow distribution as compared to a traditional one. In order to evaluate the benefits of the new configuration, a 3 D numerical model was developed allowing for a deep understanding of the airflow distribution inside the ventilated roof channels. The simulations were performed by varying the solar irradiance from 600 to 1000 W m⁻² assuming buoyancy-driven airflow. The investigation was conducted by comparing the new proposed ventilated roof assembly to the traditional layouts. In particular, two roof types were considered as benchmarks: an insulated roof and a non-insulated one. When compared to the traditional ones, the results revealed that the innovative ventilated roof led to a great reduction (up to 70%) of the total amount of solar heat gains for all the simulated scenarios.

本文介绍了一种基于新型塑料支架的通风屋顶的数值模拟，与传统的相比，该支架专门设计用于通过改善气流分布来减少太阳能热增益。为了评估新配置的好处，开发了一个 3D 数值模型，以便深入了解通风屋顶通道内的气流分布。通过将太阳辐照度从 600 改变到 1000 W m ^-2来进行模拟假设有浮力驱动的气流。调查是通过将新提议的通风屋顶组件与传统布局进行比较来进行的。特别是，两种屋顶类型被视为基准：绝缘屋顶和非绝缘屋顶。与传统屋顶相比，结果表明，创新的通风屋顶导致所有模拟场景的太阳能热增益总量大幅减少（高达 70%）。