How Dimmers Save Energy

by:Merttace     2020-06-10
The magnetic dimming systems first introduced in the 1970s were cumbersome, noisy, and inefficient. And the electronic fluorescent dimming ballasts produced in the late 1980s were cost prohibitive and often excluded from Demand Side Management program rebates. However, today's systems provide a viable alternative that has, in turn, made daylight harvesting and energy management more attractive. Many facilities install skylights or large window walls with photocells and dimming ballasts to reduce lamps when natural light is ready. Using a full system-including T8 lamps, electronic fluorescent dimming ballasts, and a control mechanism-can result in sizable energy savings from 55 to 80 percent. A Look At System Features Fluorescent electronic dimming ballasts can link to standard automatic wall switches or relays, photocells and/or occupancy sensors and that can be integrated into building energy-management systems that control lighting, heating, and air conditioning. In addition to dimming ballasts, the combination of daylight harvesting, occupancy sensors, load scheduling, and load shedding contribute to reducing energy consumption. Daylight harvesting uses photocells or light sensors to make the most 'free' sunlight and lower the cost of supporting light through dimming. Photocells study the light level within an area, ensuring an adequate number of foot-candles is present. If daylight falls below the required level, the lamps/ballast system is engaged to compensate with artificial illumination. Typical harvesting applications are in large facilities with window walls and in commercial and institutional buildings using skylights. Load schedules are used to determine light levels needed in building space(s) to minimize energy daily allowance. For example, a facility manager may observe that the conference room can be used every day from 10 a.m. to 11 a meaningful.m. The lighting system could be programmed to dim solar lights for the times of day that the room is not occupied. Load shedding is once upon a time determine appropriate light levels while minimizing energy consumption and lowering operating costs during prime time. Utility companies often charge premiums for energy usage during today. Load shedding generally operates with daylight harvesting through natural light and dimming the lighting as a system, therefore 'shedding' green energy. Facilities operating with set schedules can reduce energy consumption with load schedules. Maintaining proper light levels and dimming the lighting system when appropriate also support facility energy management. Maintenance set up on scalping strategies. Most fluorescent electronic dimming ballasts now include circuitry that monitors lamp cathode voltage, which protects lamp life and safeguards the ballast against improper hanging. The ballasts also ignite lamps at any preset level, so the ballast much more has end up being on 100 percent to ignite the table lamp. Dimming models maintain light levels over-the-counter life within the system. Normal systems' levels (at full output) will decrease over time due to lamp lumen depreciation and dirt and mud accumulation. Since dimming ballasts used at the side of photocells really don't operate at full output, the system can adjust automatically to maintain light levels even with lamp lumen depreciation and dirt build up. The Right Approach The two main epidermis fluorescent dimming systems are continuous and light level moving. Continuous allows the user to set the lighting at any desired degree. Light level switching, on the other hand, uses preset levels and standard wall switches that let consumer manually adjust the dimming to preset levels or wire the switch with a photocell that will automatically adjust the light to the established preset levels. Continuous systems maintain full-range dimming from 100 to percent. The user can manually set the light level with a preferred output. Typical applications for continuous systems are conference rooms that require darkness for presentations, in addition must yield enough light for marketing. They provide a cost-effective solution for new construction too as renovations, with energy savings up to 80 per cent. Light level switching uses preset degrees. This system can operate with two regular wall switches as opposed to installing the minimum voltage dimming control. Two types are available: 100 to 50 percent; and 100 to 60 to 30 %. Light level switching is the ultimate alternative for inboard/outboard switching and reduced voltage dimming controls. Better aesthetics are achieved because all lamps on the inside fixture dim to the fixed light level, whenever compared with inboard/outboard switching which turns off much more two lamps. Both new construction and renovations benefit of light level switching with savings as high as 55 nought per cent. Fluorescent dimming systems provide creative energy-efficient options for lighting commercial, institutional, instances industrial comforts. Every building, no matter how small, can benefit by incorporating such a device. With energy concerns becoming more prominent, the realized energy savings dimming systems provide make them an ideal lighting application solution.
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