Trombe wall can absorb solar energy and provide heat for buildings passively. To improve its heating performances, an improved Trombe wall was proposed and experimentally investigated in our previous study. To better understand the improved Trombe wall, a numerical study on investigating its heating characteristics was carried out in this paper. Overall, the improved Trombe wall increased the average air temperature at the top vent, average air velocity at the top vent, heating capacity, and thermal efficiency by 1.9 °C, 30.4%, 57.1%, and 55.7%, respectively, when compared to a traditional Trombe wall. Besides, the fields of temperature and flow in the improved Trombe wall were also much better than those in the traditional Trombe. Furthermore, the comparative analysis of the heating characteristics of the improved Trombe walls with different thickness of air channel ranging from 50 to 130 mm demonstrated that the best heating characteristics of the improved Trombe wall with a height of 2.7 m can be achieved when the thickness of air channel ranged from 70 to 80 mm. The numerical results of this paper can provide a beneficial effect on the development of the improved Trombe wall.

Trombe墙可以吸收太阳能并为建筑物被动提供热量。为了提高其加热性能，提出了一种改进的Trombe墙，并在我们先前的研究中进行了实验研究。为了更好地理解改进的Trombe墙，本文进行了一项研究其加热特性的数值研究。总体而言，经过改进的Trombe墙与上层通风口相比，上层通风口的平均空气温度，上层通风口的平均空气速度，加热能力和热效率分别提高了1.9°C，30.4％，57.1％和55.7％。传统的Trombe墙。此外，改进的Trombe墙的温度和流动场也比传统Trombe的好得多。此外，对不同风道厚度在50至130 mm范围内的改进Trombe墙的加热特性的比较分析表明，当风道厚度为2.7 m时，可以达到2.7 m高的改进Trombe墙的最佳加热特性。范围从70到80毫米。本文的数值结果可以为改进的Trombe墙的发展提供有益的影响。