[EnergyPlus_Support] External heat transfer coefficients

["Andy Tindale" <andy@xxxxxxxxxxxxxxxx>]

I am running some steady-state EnergyPlus simulations and am getting some
unexpected external heat transfer coefficients reported in the eso file.  It
seems that for rough walls I get an external heat transfer coefficient of
12.49 whatever value of wind speed I enter in the DesignDay section of the
input file.  Using the simple algorithm, I would expect this value for
windspeed =0 (looking at the equation in the documentation) but would expect
a much higher value for a windspeed of 30 m/s.

Also, I get this value whether I request the simple or detailed external
heat transfer coefficient algorithm.  Have I missed something here?  I've
attached an input file which illustrates the problem.  Thanks for your help.

Andy

=================================================
Andrew Tindale, DesignBuilder Software Ltd.
Palace Chambers, 41 London Road, Stroud, Gloucestershire, UK
=================================================


------------------------ Yahoo! Groups Sponsor ---------------------~-->
Get 128 Bit SSL Encryption!
http://us.click.yahoo.com/JjlUgA/vN2EAA/kG8FAA/dkFolB/TM
---------------------------------------------------------------------~->

To unsubscribe from this group, send an email to:
EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/




 

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Attachment not found:
D:\Documents_And_Settings\L-Lawrie\Eudora\Attach\in2.idf