Transparency schedule is modified but it has no impact on the cooling loads
Dear Community, I'm designing a dynamic shading system that changes hourly based on different shading states. I model the shading, as a context Surface with Shading:Building:Detailed and then I assigned a transmittance schedule with EMS to replicate the activation of the shading system. I have two sensors: solar radiation and operative temperature. I actually, followed the same method that was posted here: https://unmethours.com/question/37305...
I noticed that EMS is working fine, and the schedule is getting modified. But, it doesn't have an impact on the energy consumption results.
Regards
As a check have you run the model without EMS once with shading surface schedule to 1 and the other to 0. This will confirm that the shading surfaces are impacting the model. An example where it might not be is if the surface normal is opposite of what is expected and if energy plus isn't mirroring them. Or the models zone surfaces may not be sun exposed or might be adiabatic and not have any heat transfer.
I have done a similar analysis with variable transmittance schedule and noticed the same thing so I posted a question. Within the question, you will find that there are two GitHub posts on the same issue but I am not sure if the issue is resolved!
Dear @David Goldwasser, Thanks for your comment. Yes, I did check as you mentioned. cooling loads is varying with shading transmittance schedule for 1 or 0. However, when I replaced the constant transmittance schedule of 1 with EMS object that has different values of transparency throughout the year, the cooling is the same as results obtained if it is 1. I think that the new transmittance schedule doesn't overwrite the constant schedule.
Dear @Ammar De, Thanks for your reply. Yes, I'm facing the same issue. Have you been able to fix it? I will look into these posts as well. Thanks
@archammar unfortunately not. It seems the author of this post was able to get the results he is expecting. So maybe you can read the post carefully and give it another try. Do you have any intermediate values for the transmittance schedule or is it just 1 (Transparent) and 0 (opaque)? I have a workaround in mind but I need to test it.