The Research On The Characteristic And Control Strategy Of The Permanent Supplementary Artificial Lighting In Interiors

This thesis is carried out on the basis of the science and technology of Chongqing: The research on mechanism and experiment of the control of the Permanent Supplementary Artificial Lighting in Interiors.Though daylighting has been neglected all the time in interior lighting, traditional lighting control method is still used in most buildings.In addition, with the constant improvement of people's living, the pressure of the supply of electric power of our country is becoming more and more serious, among which the lighting power consumption reaches 20% of the social total power consumption. So, this thesis proposes the control strategy of "introducing" the daylighting with electromotive micro-blade and studying the Permanent Supplementary Artificial Lighting to get the healthy, energy-conserving and flexible working lighting luminous environment. Then how to use daylighting maximally and how to control output luminous flux of light sources become the main concern of this thesis.â‘ The sunshine characteristics of the building are studied and the concept of equivalent solar altitude is set up to unify the calculation of equivalent transmittance of the window under various solar altitudes and various solar azimuth angles.â‘¡The daylighting characteristics are studied to confirms adjusting rules of the blade angle to optimize the daylighting illuminance distribution. The rules are restraining the direct radiation entering room and maximization of the equivalent transmission when in clear sky, and making the equivalent transmission maximal when in overcast sky.â‘¢The artificial illumination characteristic are studied, Considering both direct illumination and indirect illumination, the illumination calculating method on the basis of Luminance transfer function matrix is put forward, and the point illumination proportion model is built. The point illumination proportion model reveals the inherent relation between the points illuminance in the room.â‘£The principle that artificial illumination is regarded as the compensation of daylighting illumination in the room is put forward, and the coordination of daylighting and artificial illumination is optimized. The least square method is adopted to estimate the elements of Luminance transfer function matrix and to optimize the luminous flux output according to daylighting luminous flux in the room; Matlab and DIALux software are adopted to simulate and analyze the system. The conclusion shows that the control system can not only reduce operation energy consumption of room lighting greatly under the IEC overcast sky,but also improve working efficiency and reduce visual fatigue.