利用内部遮阳装置减少日光眩光及其对建筑能源性能的影响

D. L. R. Garcia, F. O. Pereira
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引用次数: 0

摘要

日光眩光引起建筑物的居住者插入内部遮阳装置。在解决眩光问题时,遮阳策略可以增加内部温度和建筑冷却能耗,特别是在炎热的气候下。室内环境质量通过利用时空度量和控制算法的建筑和工程项目进行处理。本文重点研究了使用者行为、遮阳设备性能之间的相互作用,以及它们对建筑光环境和热环境的影响。这项研究旨在通过内部遮阳装置的使用来减少日光眩光的可能性,以及它们对窗户的太阳能热增益和能源冷却需求的影响。使用建筑建模和仿真方法,通过犀牛3D 5.0和插件Grasshopper+DIVA,生成了一个居住者的日光眩光概率(DGP)小时值,该居住者距离窗户1.5米。开放式模式是多层建筑中典型的私人办公室。使用EnergyPlus 8.4软件记录窗口的太阳能热增益和能源冷却需求。模型在东、西、北、南四个方向进行了模拟,网址为Florianópolis。巴西亚热带城市。从“没有太阳能控制”的情况开始,8个控制应用于4个内部遮阳装置:百叶窗50°,百叶窗0°,窗帘和卷帘。两个属性集考虑了更清晰和更深的颜色。从两种固定的阻挡模式(100%和50%),dgpin耐受(>45%)和太阳直接辐射(>50W/m²)应用于拟议的每月、每日和自动控制。在非控制条件下,dgpin耐受年频率从30%到65%不等。这些差异指出了设计的指导方针。已经证实,0°百叶窗不能保证日光眩光,并增加能源冷却需求。深色卷帘,窗帘和百叶窗50°完全解决了眩光问题,由“始终100%关闭”模式和dgpintolerance控制。清除装置仍然允许2%的dgpin耐受频率。然而,透明的滚轴遮阳帘将年冷却需求降低了11.5%,而其他设备的年冷却需求则增加了52%。深色窗帘表明窗的年太阳热增益增加最大(3%)。获得的结果可以确定一些设计准则,以平衡日光眩光保护和能源效率,有助于可持续建筑设计和低影响建筑。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Daylight glare mitigation by internal shading devices use and effects on building energy performance
Daylight glare arouses buildings’ occupants to insert internal shading devices. When solving glare issues, shading strategies can increase internal temperature and building cooling energy consumption, especially in hot climates. Indoor environmental quality has been treated through architectural and engineering projects utilising spatial-temporal metrics and controls algorithms. This article focused on investigating some interactions between user behaviour, shading devices proprieties, and their effects on building’s luminous and thermal environment. This research aimed to relate daylight glare probability’s reductions through internal shading devices uses, with their effects on the window’s solar heat gain and energy cooling demand. Using building modelling and simulation approach through Rhinoceros 3D 5.0 and plug-ins Grasshopper+DIVA, Daylight Glare Probability (DGP) hourly values were generated for an occupant, 1.5 m away from the window at a side lit-room. The open-access model is a typical private office in the multi-floors building. Window’s solar heat gains and energy cooling demands were recorded using EnergyPlus 8.4 software. The model was simulated in East, West, North and South orientations, at Florianópolis. Subtropical Brazilian city. Starting from ‘without solar control’ cases, 8 controls were applied to 4 internal shading devices: blinds 50°, blinds 0°, curtains and roller shades. Clearer and darker colours were considered by two proprieties sets. From two fixed obstruction modes (100% and 50%), DGPintolerable (>45%) and direct solar radiation (>50W/m²) were applied to proposed monthly, daily and automatic controls. DGPintolerable annual frequencies at uncontrolled condition varied from 30% to 65%. These differences pointed out design guidelines according to façades. It has been confirmed that 0° blinds don’t secure daylight glare and increase energy cooling demand. Dark roller shades, curtains and blinds 50° completely solved glare problems, controlled by ‘always 100% closed’ mode and DGPintolerable based controls. Clear devices still allowed 2% of DGPintolerable frequency. However, clear roller shades contributed to reducing annual cooling demand until 11.5% while other devices achieved until 52% increase. Dark curtains indicated maximum increased in annual window’s solar heat gain (3%). Obtained results allowed identifying some design guidelines to balance daylight glare protection and energy-efficiency, contributing to sustainable building design and low impact architecture.
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