چکیده:
Buildings play an important role in the energy demand sector. Due to the increase of environmental
concerns and renewable energy sources restriction, lighting control systems will play an important role in the reduction of energy consumption of the lighting without impeding comfort goals. Lighting control systems can control lighting consumption according to the type of building, adequate luminance, occupation time, scheduled time etc. Better lighting not only can reduce the energy consumption of a room, it can improve the quality of work from its occupants. The main aim of the project is to determine the energy saved by using different artificial lighting control systems and find the best one. Honeybee plug-in for grasshopper in a space as a classroom simulated six different systems in this article and electricity, cooling and heating energy consumption for these systems were compared. Results show that “Auto dimming with switch off occupancy sensor” has the best annual operation and it saves eight times more electricity energy than the worst system which is the traditional “Always on during active occupancy sensor”. Considering thermal energy consumption also proves the priority of occupancy and daylight dimming system. Selecting a suitable lighting control system in initial steps of design or after construction is very affordable and increases environment quality.
خلاصه ماشینی:
"Classroom Lighting Control Systems and Level of Energy Consumption, Tehran, Iran 1*Fahimeh Motazedian, 2Mohammadjavad Mahdavinejad, 3Farah Habib, 4Darab Diba 1Ph. D.
A research in Turkey showed that 30% approximate energy saving could be achieved by using daylight responsive lighting control system (Onaygil & Guler, 2003).
Energy consumption in all lighting systems listed in this article are tested to supply the work plane light level to 500 lux, which is a proper illuminance range for educational buildings (Williams,1999; Kreider, 2011; Krarti,2011).
Adequate illuminance is provided by daylight entering from the window, lights, which are located at the front of the room, near the window, might be dimmed and produce less electricity and heating energy, on the other hand, uniformity ratio, which is one of the factors supplying visual comfort will get higher.
Electricity consumption in the 5th system (Auto dimming with switch off occupancy sensor) is the most energy-efficient, because its function relates to occupancy needs and vacancy and dimmers which act based on daylight entering the room.
Comparing some of systems in a usual classroom, using Honeybee plug-in for Grasshopper simulation software, indicate that daylight harvesting systems and occupancy sensors with user preferences can have great effect on decreasing energy consumption.
Therefore, the best lighting control system for classroom, as an educational space with a simple 30% window to wall ratio in Tehran, is an occupancy and daylight harvesting dimming system."