[Radiance-general] Daysim and results

[Per Haugaard]

Dear userSorry to post my question in this forum, but since it deals with daylight I think that it's ok.
A brief question about Daysim and results.I have made an analysis of a room where I compare the energy savings for artificial lighting by changing the ceiling reflectance. I look at two types of installed effect - 5 W/m2 and 10 W/m2. which is the only difference between the two calculations. There is no solar shading in the model.
I use the same model for both analyzes. This means that I only make a one calculation of daylight coefficients. The light is controlled in both analyzes via photo sensors with dimming (photo-sensor control).
The for my question. Why is there a smaller increase in energy consumption of approximately 1 W/m2 by going from 5 W/m2 to 10 W/m2 installed power? Here I compare 2 x the energy consumption for 5 W/m2 with the energy consumption of 10 W/m2

I look forward to hearing from you

Best regards
Per Haugaard
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