Re: [EnergyPlus_Support] Food for thought....

[ahneto@xxxxxx]

Dear JIm,

I found , in my research projects, differences from 30 to 50% between  
the simulated and the actual consumption due to the use of TMY and  
actual climate data.

Regards,

Alberto Hernandez Neto

Citando Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>:

> Dear Forums,
>
> I am busy preparing a short talk for the Fall ASHRAE Energy Modeling
> Conference.  The topic is "An Approach for Calibrating Existing Building
> Energy Models to their Utility Consumption".
>
> As part of the preparation, I will address the issue of how much difference
> might result in energy conservation measure savings predictions if you use
> actual weather data for the billing period versus TMY data.
>
> To get a rough idea  how much variation there might be, I looked at Degree
> Days for a span of years.  What a variation! (for the city I'm studying at
> least)
>
> I am not yet sure how that affects total energy consumption - you'll have to
> attend my presentation in Atlanta to find out J.
>
> In the meantime, I am starting to think that existing building energy models
> should use actual weather, not TMY data.  Have any of you run similar
> comparisons for existing building models?
>
>
>
>





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