Méndez Juana Isabel, Ibarra Luis, Ponce Pedro, Meier Alan, Molina Arturo
Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Puente 222, Tlalpan, 14380, Mexico City, Mexico.
Energy and Efficiency Institute, University of California, Davis, 1605 Tilia St 100, Davis, 95616, CA, USA.
Heliyon. 2024 May 31;10(11):e31599. doi: 10.1016/j.heliyon.2024.e31599. eCollection 2024 Jun 15.
In sun-drenched regions, balancing solar exposure for thermal comfort and minimization of cooling energy presents a key challenge. While passive shading mitigates summer heat gain, it also hinders winter solar benefits, a problem that is echoed by active systems such as photovoltaic panels. Existing adaptive solutions, adjusting to seasonal sun angles, offer flexibility, but introduce complexity, maintenance demands, and potentially higher costs. This study introduces a novel static roof shading system that addresses this knowledge gap. It effectively blocks summer sunrays and allows winter insolation without seasonal adjustments or associated mechanisms. This "install and forget" approach promises improved thermal comfort and reduced energy consumption in hot climates. Rigorous energy simulations in nine different Mexican locations, using a 69 m household model, reveal significant temperature improvements. The system delivers up to 30.38% (above 5 MWh) equivalent annual reduction in HVAC usage and 71.3% relative increase in thermal comfort during hot periods. This sustainable solution offers valuable information to address indoor thermal challenges in high-temperature regions, contributing to the advancement of sustainable building technologies.
在阳光充足的地区，平衡太阳辐射以实现热舒适并将制冷能耗降至最低是一项关键挑战。虽然被动遮阳可减轻夏季热量获取，但也会阻碍冬季太阳能的益处，光伏板等主动系统也存在同样的问题。现有的自适应解决方案可根据季节性太阳角度进行调整，具有灵活性，但会带来复杂性、维护需求以及潜在的更高成本。本研究引入了一种新型静态屋顶遮阳系统，以填补这一知识空白。它能有效阻挡夏季阳光，且无需进行季节性调整或相关机制就能让冬季阳光照射进来。这种“一劳永逸”的方法有望在炎热气候下提高热舒适度并降低能源消耗。使用一个69米的家庭模型在墨西哥九个不同地点进行的严格能源模拟显示，温度有显著改善。该系统在炎热时期可使暖通空调使用量每年等效减少高达30.38%（超过5兆瓦时），热舒适度相对提高71.3%。这种可持续解决方案为应对高温地区的室内热挑战提供了有价值的信息，有助于推动可持续建筑技术的发展。
