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Energy Saving Lighting Control Systems for Open-Plan Offices: A Field Study

机译：开放式办公室的节能照明控制系统：一项现场研究

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We conducted a field study in a deep-plan office building equipped with suspended direct-indirect luminaires located centrally in cubicle workstations. In order to reduce lighting energy use, the luminaires employed integral occupancy sensors and light sensors (daylight harvesting), as well as individual dimming control accessed through occupants' computer screens. Data were collected from 86 workstations over a year to examine the energy savings and power reduction attributable to the controls, and how the controls were used. An awareness campaign that used e-mail reminders to encourage the occupants to use the individual control feature of the lighting system was also conducted. Results indicate that the lighting system generated substantial energy savings and peak power reductions compared to a conventional fluorescent lighting system installed on a neighboring floor. The installed lighting power was 42 percent lower than that of the conventional system. The three controls combined saved 42 to 47 percent in lighting energy use compared to the same lights used at full power during work-hours; this translated into overall savings of 67 to 69 percent compared to the conventional Ughttng system. If the three lighting controls systems had been installed separately, occupancy sensors would have saved, on average, 35 percent if used alone, light sensors (daylight harvesting) 20 percent, and individual dimming 11 percent. The light sensor savings were, as expected, higlier in perimeter workstations, and would have matched the performance of the occupancy sensors with some modifications to the control parameters. The average daily peak power demand forrnlighting was also reduced by a similar amount, which resulted in an average effective lighting power density of only 3 W/m~2. Altltough not detailed in this paper, surveys indicated that the studied lighting system was also associated with higlier occupant satisfaction. This was likely due to the individual dimming control although use of this control beyond an initial preferred setting was rare.
机译：我们在一个深层计划的办公楼中进行了实地研究，该办公楼配备了悬挂式直接/间接照明器，这些照明器位于小办公室的中央位置。为了减少照明能源的使用，照明器采用了集成的占用传感器和光线传感器（采光），以及通过占用者计算机屏幕访问的单独的调光控制。一年中从86个工作站收集了数据，以检查归因于控件的节能量和能耗，以及控件的使用方式。还开展了一项宣传运动，该活动使用电子邮件提醒来鼓励居住者使用照明系统的个性化控制功能。结果表明，与安装在相邻地板上的常规荧光照明系统相比，该照明系统节省了大量能源并降低了峰值功率。安装的照明功率比常规系统低42％。与在工作时间内全功率使用的相同灯相比，这三个控件合起来节省了42％至47％的照明能源消耗。与传统的Ughttng系统相比，这意味着总体节省了67％到69％。如果三个照明控制系统分别安装，则如果单独使用占用传感器，则平均可节省35％，节省光传感器（采光）20％，单个调光11％。像预期的那样，光传感器的节省是外围工作站中的更高水平，并且在对控制参数进行一些修改的前提下，可以使占用传感器的性能与之匹配。每日平均峰值照明功率需求也减少了相似的数量，导致平均有效照明功率密度仅为3 W / m〜2。尽管本文没有详细介绍，但调查表明，所研究的照明系统也与较高的乘客满意度有关。这可能是由于单独的调光控件，尽管很少使用超出初始首选设置的控件。

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