[EnergyPlus_Support] Re: Unexpected results when running model with Daylight and Window Shading control

["diorthotis" <diorthotis@xxxxxxxxx>]

Ok reference case: 752GJ for heating 161GJ for cooling
1st scenario: 771GJ for heating 155GJ for cooling
2nd scenario: 694GJ for heating 104GJ for cooling

Well I will check the variables for solar heat gain and glazing heat loss. Thanks

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad <RRaustad@...> wrote:
>
> You didn't say whether the 3rd case has lower/higher heating energy than 
> the 1st case, only that the 2nd case is lower than both of these. The 
> switchable glazing can help to retain heat (can reduce glazing heat 
> loss). It would be a trade off on solar heat gain vs glazing heat loss 
> You should look more closely at available report variables (*.rdd) to 
> further investigate.
> 
> diorthotis wrote:
> >
> > I get some really strange results when I run a simulation for a 
> > Benchmark Medium Office New V1.3_5.0 model (I downloaded it from the 
> > benchmark buildings web page of DOE). I created three scenarios:
> >
> > Reference scenario: nothing changed to the model
> >
> > 1st scenario: added Daylight Control for lights
> >
> > 2nd scenario: Daylight Control in the lights together with switchable 
> > glazing control.
> >
> > Adding Daylight Controls is supposed to reduce cooling energy and 
> > increase heating energy, as the lights, which are internal load, are 
> > dimmed when possible. In the second scenario, the required heating 
> > energy will be further increased and cooling energy decreased, because 
> > additional solar gains are rejected.
> >
> > Running the simulation for different weather files I discovered that 
> > in some cases (for example for the Amsterdam weather file) the 
> > required heating energy is for the 2nd scenario less than in the other 
> > cases. (Concerning cooling energy, there everything is OK).
> >
> > How can this be possible?
> >
> > 
> 
> -- 
> Richard A. Raustad
> Senior Research Engineer
> Florida Solar Energy Center
> University of Central Florida
> 1679 Clearlake Road
> Cocoa, FL  32922-5703
> Phone:   (321) 638-1454
> Fax:     (321) 638-1439 or 1010
> Visit our web site at: http://www.fsec.ucf.edu
> 
> UCF - From Promise to Prominence: Celebrating 40 Years
>




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