My project has very large South East facing windows and the morning sun is causing major solar gains.
I know the architect intends to install blinds - how can I force DDB to see these to prevent the gain?
I have set up the windows with blinds. How do I know the system is taking these into consideration.
Also does it make any difference to the gain calc if I tick the operable box for the windows?
Regards
Craig
Hi Craig,
Blinds are modelled in the Glazing Data menu - please find further details here.
To take blinds into account in Design Database calc's they will need to be incorporated into your Solar Gain Factors for your glazing. Your glazing manufacturer should be able to specify the exact figures for you. Alternatively you can calculate them yourself according to this document.
Could you please clarify what you mean by "tick the operable box for the windows"? Are you referring to the below option?
If so, this option is to include any fins included in your Window surfaces:
Shane Regan | Principle Building Performance Support EngineerHevacomp to OpenBuildings - A complete guide for every user | Bentley Communities
Hi Shane
Many thanks for the prompt reply.
WRT - "tick the operable box for the windows"? look at your second image just beside window type there is a tick box for operable windows.
It made a very minor change to my heat gains when ticked.
I was hoping the gain would account for manual opening of windows.
Hi Craig, thanks for clarifying! To model window openings in your DDB calc's you would need to incorporate them into your air change rate figures in the room data.
Alternatively, more complex openable window simulations can be carried out by using Simulator, in which you can specify window opening strategies through Flowpaths in CAD Input.