Quantifying electrical energy savings in offices through installing daylight responsive control systems in hot climates
Quantifying electrical energy savings in offices through installing daylight responsive control systems in hot climates
复制标题
DOI：
10.1016/j.enbuild.2017.07.078
复制
发表时间：
2017-10
影响因子：
6.7
通讯作者：
N. Shishegar;M. Boubekri
中科院分区：
文献类型：
--
作者：
N. Shishegar;M. Boubekri
照明被认为是降低建筑物能耗的最重要问题之一。据估计，在美国典型的商业建筑中，电气照明消耗总电能的25-40%。在过去的三十年里，人们越来越关注减少与人工照明相关的能源消耗。日光照明可以被认为是人工照明的一种具有成本效益的替代方案，它不仅减少了对电能的需求，而且还为居住者提供了一个愉快、有吸引力和健康的室内环境。通过安装传感器和控制器，日光照明能够减少甚至消除在办公室中提供足够照度水平所需的人工照明的使用。本研究是一个基于模拟的研究，调查各种类型的采光控制器的影响，提高总的和照明的办公楼位于炎热的气候的电能消耗。本研究评估了调光（5%、10%和20%光）、开/关和步进控制系统的效果。E-Quest被用作能源模拟工具，用于计算和比较电力和照明能耗。为了评估日光控制系统在潮湿和干热气候中的效果，分别位于ASHRAE 90.1气候带1A、2B和2A的迈阿密、凤凰城和休斯顿被选为原型建筑的三个位置。原型建筑是一座四层开放式办公楼，宽18 m ×长36 m ×高15 m，沿着东西轴线。评估了所有方向上20%、40%、60%和90%的窗墙比。窗户包括所有立面的水平遮阳以及东、西立面的百叶窗。本研究的结果表明，在所有研究的城市，在办公楼安装日光照明控制器显着降低建筑物的电能消耗，特别是照明。
Lighting is considered as one of the most important issues in reducing energy consumption of a building. It is estimated that electrical lighting consumes 25–40% of the total electrical energy in a typical commercial building in the United States. Over the last three decades, there has been a growing concern about reducing energy consumption associated with artificial lightings. Daylighting could be considered as a cost-effective alternative to artificial lighting which not only reduces the demands for electrical energy, but also provides occupants with a pleasant, attractive, and a healthy indoor environment. Through installing sensors and controllers, daylighting is able to reduce and even eliminates the use of artificial lighting needed to deliver sufficient illuminance levels in an office. Present study is a simulation based research that investigates the impacts of various types of daylighting controllers on enhancing total and lighting electrical energy consumption of office buildings located in hot climates. Effects of Dimming (5%, 10%, and 20% light), On/Off, and Stepped control systems are evaluated in this study. E-Quest is used as the energy simulation tool to calculate and compare electrical and lighting energy consumption. In order to assess the effects of daylight control systems in humid and arid hot climates, Miami, Phoenix, and Houston, located in ASHRAE 90.1 climate zones of 1A, 2B, and 2A respectively, have been chosen as three locations for the prototype building. The prototype building is a four-story open office building measuring 18 m wide × 36 m long × 15 m high oriented along east-west axis. The window to wall ratio of 20, 40, 60 and 90% in all directions are assessed. Windows consist of horizontal shading in all façades as well as blinds in those of East and West. Results of this study demonstrate that in all studied cities installing daylighting controllers in office buildings significantly reduces electrical energy consumption of the building particularly that of lighting.