[Equest-users] Unexpected Custom SHGC Results

[Chris Jones]

I can think of a number of reasons why you might see an increase in 
cooling and fan "load".  Without spending some time looking at the 
input/output, it is pretty hard for me to offer any definite 
opinion.  I know for myself, it is generally an input assumption I 
hadn't considered, not a flaw on the modelling program.

For doing analysis on an existing building, you want to make sure 
your inputs are not defaulting and that the model somewhat matches 
the building.



At 02:51 PM 14/07/2012, Peter Baumstark wrote:
>Hello,
>
>I have an "L" shaped building with the point of the "L" facing 
>North.  The inside of the "L" has both NE and NW surfaces, that 
>include a high amount of glass, which heats up the perimeter 
>building spaces considerably during the summer.  Glazing is single pane tinted.
>
>The customer wants to install some Verisol SilverScreen shades in 
>these windows.  According to the manufacturer, the SHGC will reduce 
>by about 33%.  I modeled in eQUEST, window properties in these 
>windows to have an SHGC of 0.67 and ran an EEM reducing SHGC to 
>0.34, and got an increase in cooling load and fan load year round, 
>even in the summer months.
>
>Am I seeing this wrong?  I can't figure out how I could possible get 
>results like this?
>
>Thank you,
>Pete
>San Jose, CA
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Christopher Jones, P.Eng.
Suite 1801, 1 Yonge Street
Toronto, ON M5E1W7
Tel. 416-203-7465
Fax. 416-946-1005
email cj at enersave.ca