Zone Air Temperature Simulation by EnergyPlus
Hi everyone,
Now I'm trying a very simple simulation of a natural temperature by using EnergyPlus (OpenStudio). The model is 64 cubic meter (Width 4m * Depth 4m * Height 4m), the boundary condition of only one surface with a window (3m*3m) is "outdoor" and the others are "adiabatic". I don't set any internal load or ventilation, and just do a simulation of natural ventilation.
The result is as attached. I cannot understand why the zone air temperature is so higher than the outdoor temperature in the winter season. Especially in January, the zone air temperature is almost 50℃ (120ºF). I cannot find a failure of my setting of this simulation.
Please give me some advice.
what is the latitude of the simulation (roughly), what is the orientation of the one wall that does have exterior exposure and a window, and is their any overhang over the wall or window? I'm wondering if it is setup in such a way that there is more solar gain through the window and on the surface in winter than summer. If you had a very low conductivity to the wall and window, then solar gain could play more of a role in zone temperature than the outdoor air temperature.
Dear David, thanks for your reply. I checked a solar heat gain through the window and as you said, the solar gain caused this high indoor temperature. Thanks again for your advice.