Abstract :
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.
2011 Elsevier Ltd. All rights reserved.
