Re: [EnergyPlus_Support] Changing the DesignDays - no difference in the cooling loads

["Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Assuming that you mean "annual energy use" for "results", that sounds correct.  The DesignDays are used to size equipment, while the weather file is used for annual energy calculations.

I think there should be small differences in energy use when using different DesignDays dues to the varying impact of part load performance curves, but a few degrees difference in the DesignDay won't affect the energy use very much.

On Thu, Aug 25, 2016 at 1:22 PM, ifigeneiat@xxxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 

Dear all, 

I am running a set of simulations in order to compare the difference between the cooling loads for a building with different SummerDesignDay objects according to in-situ measurements for the actual climatic conditions. I have changed the Maximum Dry-Bulb Temperature but there is no difference in the results. 
Any tips?

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James V Dirkes II, PE, BEMP, LEED AP
CEO/President
The Building Performance Team Inc.
1631 Acacia Dr, GR, Mi 49504

Direct: 616.450.8653
jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx

Website l  LinkedIn | May 2016 ASHRAE Journal article on energy modeling

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Posted by: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

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