A conceptual framework for dynamic control of daylighting and electric lighting systems

As an initial step toward establishing a comprehensive research program on building automization, a conceptual framework for a dynamic and integrative control of daylighting and electric lighting systems for commercial buildings is presented. The integrative control of architectural systems creates opportunities to reduce energy consumption in buildings. With the increased application of microprocessors to HVAC, electric lighting, and adjustable facade elements, occupants and climatic conditions can be used to advantage. For daylighting control, an integrative control approach is proposed that considers context variables, control logic, design variables, and control functions. From these, a framework was developed for the integrative control of architectural systems. An important part of the integrative control approach is the application of predictive control functions. In the case of daylighting control, this includes predictors for glare index and light level. By parsimoniously expressing these variables in terms of easily sensed climatic variables and window properties, an integrative solution can be achieved that considers energy efficiency and occupant well being