iK Lab|Brise soleil: the right position

Louvre, blind and brise soleil are a quite important tool in order to control the solar gain. But the problem is: how to design it? where to put them? Just a simple example: I run 3 tests with the same glass and the same blind.
As we can easily understand from the pictures I posted, the right position of the blinds might be outside (we only gain 21% of total amount of energy available) and the worst is inside (the radiation is already entered - 52%). The solution of the blinds between the two glass panels is a little bit controversial.
Pro:
- they don't need to be cleaned (outside they get dirty easily)
- we can buy blinds and glass "all in one".
Cons:
- The termal performances is not very good: if the color of the blind is dark, they will reflect a small part of it, re-irradiating part of the radiation absorbed.
- If we choose this system, we buy all the device already assembled: if some parts of the system get damaged, we must change everythig (as you can guess, it is not very suitable for big surfaces)

(blinds in between - iaakuza)

(blind outside - iaakuza)

(blinds inside - iaakuza)

The simulation was run under Arup Software, called E+TA, the location is London and period I chose is July .

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