The structural components of load-bearing concrete frame buildings, such as concrete beams and columns, are critical elements of the facades which often act as a thermal bridge. To reduce the impact of structural thermal bridge areas in non-retrofitted Portuguese residential buildings, a new innovative solar passive retrofit solution, named Solar Bridge Retrofit System (SBRS), is proposed. This concept relies on the principles of unvented Trombe wall systems and consists in using an external transparent skin in front of the structural areas of the envelope in combination with the traditional ETICS in the remaining area. Contrary to the traditional Trombe walls, this innovative design enables the heavy structure of the building to absorb solar radiation and conduct the heat slowly inward or to the adjacent structure.

To evaluate the thermal performance of the SBRS, an experimental setup was developed. The field results obtained during February and March 2020 for two different configurations, showed that the double-glazing configuration in combination with ETICS has the potential to improve thermal comfort and reduce energy consumption. This paper addresses both the design of the SBRS and the obtained results from the experimental work.

承重混凝土框架建筑的结构部件，例如混凝土梁和柱，是立面的关键元素，通常充当热桥。为了减少结构性热桥区域对未翻新葡萄牙住宅建筑的影响，提出了一种新的创新型太阳能无源翻新解决方案，即太阳能桥翻新系统（SBRS）。该概念基于未通风的Trombe墙系统的原理，在于在信封结构区域的前面使用外部透明蒙皮，并与其余区域中的传统ETICS结合使用。与传统的Trombe墙相反，这种创新的设计使建筑物的沉重结构能够吸收太阳辐射并将热量缓慢地向内传导或传给相邻的结构。

为了评估SBRS的热性能，开发了实验装置。2020年2月和2020年3月在两种不同配置下获得的现场结果表明，与ETICS结合使用的双层玻璃配置具有改善热舒适性和降低能耗的潜力。本文介绍了SBRS的设计以及从实验工作中获得的结果。