Calculation method of relationship model between external sunshade louver rotation angle and indoor illuminance
A technology of rotation angle and calculation method, applied in geometric CAD, special data processing applications, etc., can solve problems such as large difference in calculation results, increased energy consumption, neglect of edge effects, etc., and achieve the effect of improving accuracy
Active Publication Date: 2021-05-28
CHONGQING UNIV
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Problems solved by technology
[0003] The adjustment method of the louvers will greatly affect the comfort of users and the energy consumption of the building. If the adjustment of the louvers is not reasonable, it will not only increase the energy consumption, but also affect the promotion of the louvers.
At present, most of the existing louver control methods on the market are relatively simple, and many louver systems under research cannot be put into practical use, so the development space of the sunshade louver system is huge
[0004] At present, in the study of the louver illumination model, the following assumptions are generally made: first, the thickness of the louver is ignored; second, the louver is straight and opaque; third, the edge effect is ignored; this results in the calculation There is a large difference between the results and the actual sampling results, and the reference value is relatively limited
Method used
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[0067] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0068] The purpose of the present invention is achieved by such technical solutions, as figure 1 As shown, the specific steps are as follows:
[0069] 1) Determine the shape of the louver, and determine the specific size parameters of the louver, if it is a straight louver, proceed to step 2), if it is a curved louver, proceed to step 5);
[0070] 2) Taking the specific size parameters of the louvers obtained in step 1) as known conditions, determine the relationship expression between the rotation angle of the straight louvers and the shading area, so as to obtain the area ratio of the vertical projection shaded by the louvers;
[0071] 3) Taking the proportion of the area occupied by the shaded part of the vertical projection obtained in step 2) as a known condition, determine the direct transmittance of the straight louvers;
[0072] 4...
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Abstract
The invention relates to a calculation method for the relationship model between the rotation angle of the external sunshade louvers and the indoor illuminance, and belongs to the technical field of natural lighting adjustment of the external sunshade louvers. 3) Determine the diffuse transmittance; 4) Determine the average equivalent reflectance; 5) Determine the initial luminosity of the window; 6) Determine the luminosity of each surface in the room after mutual reflection; 7) Determine the relationship between the calculation point and each indoor Angle factor between surfaces; 8) Determine and calculate point illumination. The invention can accurately calculate the illuminance of any point in the room, and realize the optimal control of the adjustment of the louvers.
Description
technical field [0001] The invention belongs to the technical field of natural lighting adjustment of external sun-shading louvers, and relates to a calculation method for a relationship model between the rotation angle of external sun-shading louvers and indoor illuminance. Background technique [0002] Building external sunshade louvers is a complex system and an important part of intelligent buildings. It has been developed rapidly because of its huge potential in energy saving and emission reduction and greatly improving the comfort of occupants. The goal of the louver system is the illuminance of the working plane, and the control object is the motor. Therefore, an illuminance model is needed to correlate the illuminance change with the motor rotation angle. Establishing an accurate illuminance model is an important basis and basis for selecting a system control strategy, which is of great significance . [0003] The adjustment method of the louvers will greatly affect...
Claims
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IPC IPC(8): G06F30/13
CPCG06F30/13
Inventor 林景栋杨琰冰郑锡曾宪杰潘攀王坤
Owner CHONGQING UNIV