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Re: [EnergyPlus_Support] Problem of unmet hours in relation with the sizing period
That is a very good question. I do not know all that is calculated
during sizing, but I would look at the eio files and see how the
equipment sizes and air flow rates changed. Also check the value for
coil sensible heat ratio (SHR).
Also look at the output and see how well the zone temperature and
relative humidity are being maintained (specifically during the unmet
hour periods), since this data is used to calculate unmet hours.
surekha tetali wrote:
>
>
> Hello,
>
> I am working on a basic model using EnergyPlus and Hyderabad weather file.
> I created two similar models/files with the only difference being the
> sizing period as below,
> case1: sizing period of two days, and other,
> case2: with the sizing period as one year.
>
> In the first case the number of unmet hours are 86 hrs and,
> in the second case the unmet hours are 1416 hrs.
>
> Why are the unmet hours increasing in the second case. Should it not
> do the sizing for the worst days such that the unmet hours are zero.
>
> Please help me understanding this behavior of the models.
> I am herewith attaching both the idf files.
>
>
> Thanks & Regards,
>
> --
> Surekha Tetali
>
>
--
Richard A. Raustad
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Florida Solar Energy Center
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