How to calculate the average power density of building lighting

1. Check the building lighting design manual. It’s in the book, and I can’t remember the specific formula.

2. The calculation method is that the power of the lamp in the whole illuminated space is divided by the area of the illuminated space, and the lighting power density is obtained. The introduction of the concept of lighting power density value is to advocate the application of efficient light source to reduce the installed capacity of lighting when the same illuminance value is reached, so as to reduce the power consumption of lighting operation and achieve the purpose of energy saving.

3. Simple calculation method average value method: the lamp efficiency is about 0.7, and the maintenance coefficient is about 0.7-0.8. Take 0.8 in a clean place, or 0.7 in a clean place. Take the office as an example: take 300Lx as the standard illuminance. N ≥ 300 10 / (1800 0.7 0.8) = 276. Take 30 sets.

4. this suggestion is for you to browse: electrical data Health Network, Lighting, Illumination Standard, Construction. Wait for information.

5. The Urban Road Lighting Design Standard and the Urban Night scene Lighting Design Standard, which have been submitted for review, contain the maximum allowable lighting power density (LPD) of different lighting places under different conditions.

6. therefore, it is required that the actual lighting power density in the lighting design should be less than or equal to the maximum limit of the lighting power density specified in the standard. If equal, it is a qualified design; if it is exceeded, it is an unreasonable design.

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What does “lighting power density (LPD)” mean?

The LPD value in building electricity refers to the lighting power density value, the lighting power density value refers to the room or place of the building, and the lighting installation power per unit area includes the power consumption of ballast and transformer, in watts per square meter.

Content expansion: definition of lighting power density (LPD): room or place of a building, lighting installation power per unit area (including power consumption of ballast and transformer), in watts per square meter. The lighting power density is expressed by LPD value, in watts per square meter.

The power density value is a value considered in the lighting design, which means the power of the lighting lamp per square meter when the prescribed illuminance value is reached. In the room or place of the building, the lighting installation power per unit area (including the power consumption of ballast and transformer) is also the lighting power density.

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