[EnergyPlus_Support] Re: one strange problem about weather data

["hvacgeshen516" <geshen516@xxxxxxxxx>]

Thanks a lot. 

Problem solved.
yeah, it's the problem of time step..


> The reason is that EnergyPlus uses sub-hourly time steps and the 
data 
> are "averaged" over the reporting frequency.
> 
> Change the number of timesteps per hour to 1 (ref Timestep object) 
and 
> the minimum system timestep to 0 (ref ConvergenceLimits object) and 
try 
> the comparison again.
> 
> Timestep,  1;   !- Number of Timesteps per Hour
> ConvergenceLimits, 0; !- Minimum System Timestep
> 
> Let us know if you still find difference in the weather file data..
> 
> hvacgeshen516 wrote:
> >
> > Problem description:
> > I downloaded one weather data from www.energyplus.gov
> >
> > 1. I transfer it from epw to csv format;
> > 2. I use this epw to do simulation and get output about outdoor 
dry bulb.
> >
> > however, results are: outdoor dry bulb from 1 and 2 are 
different...
> >
> > who know why? thanks
> >
> > I am still trying to find the reason..
> >
> >  
> 
> -- 
> 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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