[EnergyPlus_Support] Re: Sudden temperature drops and ups

["L Lawrie" <linda@xxxxxxxxxxxxxx>]

The secret here was that the RunPeriod object told the program to "consider weather file rain/snow" in the simulation.

When it's raining, the program does, through convection coefficients, tries to drive the outside surface temperature of a surface to the outdoor wetbulb. Apparently, the weather indicates rain for an interval.  (I may look at that in detail tomorrow) but removing those from consideration has a steady change in roof surface temperature.

Answered on the helpdesk -- included here for your information.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "malindow" <fypguevibyor@...> wrote:
>
> I make a building model (simple box). I run a simulation and got roof temperature profile during 1 week period. There are a lot of sudden ups and downs (like zig-zag) in the temperature profile.
> 
>



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