Probably slightly off topic but hoping someone interested in the topic
can help me if interested in the topic.

I am running with E+ a daylighting simulation to optimise the shading
device of a standard office building. Im using a single zone model for
simplicity and shading devices are modelled as Shading:Zone:Detailed
surfaces.

At the momento to optimise it Im running a GA which uses a fitness
fucntion daylighting issues only. I wanted to keep my fitness function
as simple as possible so I considered the uniformity ratio over my
illumninance map grid. In this case my fitness function is F = Emax/Emin
where Emax and Emin are respectivele the max and min illuminance values
over the map grid.

Now I wanted to consider and possibly optimise my shading device
according to other factors such as heating and cooling electricity
demands. So I was thinking to calculate my new Objective function as MIN
Zone Heating Load [J] + Zone Cooling Load [J] / Zone Load Target. This
can be caclulated using the Zone,Meter,Heating:EnergyTransfer +
Zone,Meter,Cooling:EnergyTransfer respectively.

Do you think this approach could be reasonable?

many thanks in advance