Re: [EnergyPlus_Support] revisiting design day info

["Michael J. Witte" <mjwitte@xxxxxxxx>]

The design data in the weather files is from 2001 ASHRAE data.  The  
datasets use pre-1997 data.  The ASHRAE data was completely redone in 
the 1997 Handbook of Fundamental.  The percentage basis was seasonal 
in pre-1997, now it is annual.  This, along with some other changes 
in method resulted in slightly different values. 

"MWS .40%" and PWD .40% are the cooling wind conditions. 3.  Almost, 
use "Range of DB" data for cooling day, use zero range (constant 
temperature) for heating day; clearness, must select, conservative is 
zero for heating day, 1.0 for cooling day, clearness ranges from 0.9 
at sea level in humid region to 1.1 at high altitude.  



On 9 Nov 2002, at 22:08, no_rb wrote:

> If i look at the 5zoneaircooled.idf example - the design day 
> information does not completely match the info in the USA_IL_Chicago-
> Ohare_TMY2.epw/rpt file (and it did not match the blastdesign file).
> Also i cannot seem to find wind direction slot for the cooling design
> day in the weather file
> 
> am i missing something or does the ashrae design day not provide
> complete information for the eplus design input?
> 
> thanks in advance for any pointers.
> 
> rohini
> 
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