Hi All
I found a problem while simulating the shading surface in EnergyPlus.
I would like to simulate a model as can be seen in picture 1 below. The model has opaque shadings on the right, left, upper side and in the area between the window, plus a shading with transmittance in the front area. (picture 1 - I set the model to be transparent so that all the shading device can be seen).
Basically, I would like to know how much the window heat gain reduction can be obtained by varying the transmittance on the front shading. I assumed that the higher the transmittance the higher the window heat gain will be.
However, after doing several simulations, the result was not as I expected. The result showed that the window heat gain obtained by using the 80% transmittance front shading is higher than without using the front shading at all. Besides, I also checked whether the heat gain will also be lower if I set to 99% (near 100%) transmittance. But, the result showed that the 99% transmittance front shading has higher heat gain than the 80% transmittance (as expected). I also check if the result will be different if I set the transmittance to 100% (transparent), without deleting the shading object in the model. But, it showed the same result as deleting the shading.
After trying to fix this error, I found that by deleting the vertical shadings which are placed between two windows (see picture 2 ? without the vertical shadinngs), this error can be solved. So, I guess this error occurs because there is an overlap between those shading surface objects.
Thus, I would like to ask if anyone here ever find the same problem (error) before? Does it correct that this vertical shading is the reason of this error? Or is there any other explanation?
How can I fix this error without deleting those vertical shadings that I mention above? Because my actual model will have this shading and I would like to include those shadings in my model. Maybe anyone here has any idea of the other way to simulate my model.
Thank you so much!
Cheers
Nurul