To maximize the respective benefits of open-loop and closed-loop systems, and minimize their limitations, the California Lighting Technology Center (CLTC) developed a dual-loop photosensor control system for skylight applications. The system features a control algorithm that monitors the open-loop and closed-loop photosensors and controls the electric light to provide the designed light level. It also automatically recalibrates nightly in order to adjust to longterm changes to the interior space.
Features & Benefits:
- Automatic recalibration reduces maintenance costs
- Differentiates between daylight and space changes for more accurate light level adjustments
- Dramatically improves lighting consistency
- Improves the energy savings of open-loop control systems by 50%
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