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.

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.

C:\fakepath\result.PNG

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 * 4mDepth 4m * 4mHeight 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.

C:\fakepath\result.PNG