Daylight Harvesting — Video One
Summary
TLDRThe video discusses daylight harvesting, a lighting control strategy that adjusts artificial lighting based on natural light levels to save energy. It illustrates a typical office setup with a daylighting sensor and explains how artificial lighting is managed throughout the day. Starting from dawn with full artificial lighting, the system dims as natural light increases, achieving maximum energy savings when natural light is at its peak. As the day progresses into the afternoon and dusk, the artificial lighting is adjusted accordingly. The video sets the stage for a follow-up discussion on control methods for daylight harvesting.
Takeaways
- 🌞 Daylight harvesting is a control strategy for lighting.
- 💡 It adjusts artificial lighting based on natural light levels.
- 🌅 The goal is to save energy while maintaining desired lighting.
- 📊 A graph shows the relationship between artificial and natural lighting.
- 🌄 At dawn, artificial lighting is at full brightness.
- 🌞 As natural light increases, artificial lighting dims.
- 🔋 Maximum energy savings occur when natural light exceeds dimming capability.
- 🌇 In the afternoon, as natural light decreases, artificial lighting is brightened again.
- 🌙 At dusk, artificial lighting returns to full brightness.
- 🔄 The cycle repeats each day with changing natural light.
Timeline
- 00:00:00 - 00:02:16
The video introduces daylight harvesting, a control strategy that adjusts artificial lighting based on natural light levels to save energy. It features an office setup with a daylight region, a sensor, and a window. The explanation begins at dawn with no natural light, requiring full artificial lighting. As the sun rises, natural light increases, prompting a dimming of artificial lights to maintain the desired brightness. This dimming continues until natural light surpasses the artificial light's dimming capability, maximizing energy savings. In the afternoon, as natural light decreases, artificial lighting is gradually brightened again until dusk, when artificial lights return to full brightness. The video concludes by indicating that the next installment will discuss open loop and closed loop control methods for daylight harvesting.
Mind Map
Video Q&A
What is daylight harvesting?
Daylight harvesting is a control strategy that adjusts artificial lighting based on the amount of natural light in a space.
What is the goal of daylight harvesting?
The goal is to save energy while maintaining a desired lighting level.
How does artificial lighting change throughout the day?
Artificial lighting dims as natural light increases and brightens as natural light decreases.
When do maximum energy savings occur?
Maximum energy savings occur when natural light exceeds the dimming capability of artificial lighting.
What happens at dusk?
At dusk, artificial lighting returns to full brightness as natural light diminishes.
What will the next video cover?
The next video will cover the two different control methods: open loop control and closed loop control.
- daylight harvesting
- energy saving
- lighting control
- natural light
- artificial lighting
- office setup
- sustainability
- lighting strategy
- open loop control
- closed loop control