[EnergyPlus_Support] Re: Cooling Recovery Problem

["mjwitte" <mjwitte@xxxxxxxx>]

I've experimented with this file.  The "sink" is the mass of the
building.  It appears to be a very well insulated building, there are
no windows, no internal gains, and some infiltration.  The
temperatures trends are generally upward.  There just is not enough
heat getting into the space to warm up the mass as fast as you expect.
 I tried increasing the infiltration rate x100 and the air and surface
temperatures quickly rise to >30C.  It appears that you need to
increase the drivers, or allow a longer warmup time.

Mike


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "aboyemeplus"
<Merid.Aboye@...> wrote:
>
> I am trying to simulate a scenario where Air Conditioning (in this 
> case Purchased Air at fixed flow rate) is supplied to a building, 
> after the building has been shut off for a number of days. The idea 
> is to let the building come into equilibrium with the surrounding 
> environment (90F Zone air and Wall temperatures) before initiating 
> cooling. 
> I am simulated the problem using a modified weather file where all 
> parameters between 7/1 and 7/21 3PM are set equal to the 7/21_15:00 
> wheather data record, which happens to have a DB temperature of 90F.
> The simulation is run strating on 7/01_0:15 and ending on 7/21_ 
> 24:00. Cooling is initiated on the last day, at 15:00. Upto that 
> point, results show that each zone air temperature only increase by 
> about 5F to 85F, dispite the fact that the unconditioned building 
> sits in 90F environment for over 20 days with infiltartion turned 
> ON. Since floors are      ed as non-conducting, I am having 
> difficulty identifying what the sink is? Furthermore, whether the 
> building is shutoff for a couple days or 20 days, I do not see 
> differences in the transient temperature responses. Can someone 
> please help? All relevant files are saved under \Problem 
> Submttals\Aboye_recovery\.
> 
> Thank you for your kind support.
> 
> Merid
>




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