An open-loop venetian blind control to avoid direct sunlight and enhance daylight utilization

作者：Zhang Shenqiu; Birru Dagnachew^*

来源：Solar Energy, 2012, 86(3): 860-866.

DOI：10.1016/j.solener.2011.12.015

• Venetian blinds
• Daylighting
• Shading control
• Open-loop
• Glare

Shading devices, such as venetian blinds, are widely used to eliminate glare and maintain a comfortable working environment for occupants. This paper proposes an open-loop control of blind height and slat angle based on an analytic model of solar position, and geometry of venetian blinds and the windows. The algorithm enables completely blocking direct sunlight from entering the room beyond a certain user specified interior distance from the window while enhancing daylight utilization. We derive closed-form solutions for blind height and angle which are easily implemented in practice. Moreover, the proposed blind control algorithm is simulated with favorable performance. The algorithm has also been implemented and verified in real-time test-beds.

• 出版日期2012-3