RTQ-R’s shadings devices evaluation from a thermal and luminous point of view

Abstract Currently, the Brazilian Energy Labelling System for Residential Buildings, RTQ-R (BRASIL, 2012) values non-venetian shading devices with a maximum weight of 50% of the venetians performance, even though those shading devices show more effective thermal and daylighting performance. This study investigated the energy savings potential as well as the thermal and luminous performance of different shading devices in order to propose an adequacy of the current RTQ-R shading device rating system. Moreover, computational simulations were performed for four orientations in seven Brazilian bioclimatic zones and with seven different shading devices. From the computational simulations performed, a single rating system was proposed. The results indicated a considerable distortion between the simulations and the RTQ-R scores. Bioclimatic zones and solar orientation were noted to have a significant impact on the simulation scores, and, therefore, the study proposes a method that integrates both topics in the shading device rating system.

摘要：当前，巴西2012年发布的住宅建筑能源标识系统RTQ-R规定，非百叶式遮阳装置的最高赋分仅为百叶遮阳装置性能的50%，尽管此类非百叶式遮阳装置的热工与采光性能更为优异。本研究针对不同遮阳装置的节能潜力、热工及采光性能展开调研，旨在为现行RTQ-R遮阳装置评分体系提出适配优化方案。此外，研究针对巴西7个生物气候区的4种建筑朝向，搭配7种不同遮阳装置开展了数值模拟试验。基于本次模拟结果，研究提出了一套统一的评分体系。结果显示，数值模拟结果与RTQ-R现有评分体系存在显著偏差。研究发现，生物气候区与太阳朝向对模拟评分具有显著影响，因此本研究提出了一种将这两类因素整合至遮阳装置评分体系的方法。