[Equest-users] Ashrae Baseline Model & Unmet loads

[Martz, Amanda]

I have reverse action set, a range of 6 degrees, night cycling set to
"cycle on any," and a 20 degree delta T. You're right, those usually do
the trick, that's why I'm so stumped. 

 

________________________________

From: Amber Welsh [mailto:amber at timmonsdesigneng.com] 
Sent: Wednesday, July 21, 2010 1:28 PM
To: Martz, Amanda
Subject: RE: [Equest-users] Ashrae Baseline Model & Unmet loads

 

Amanda,

 

When I first had these problems it had to do with fan control and night
cycling.  Make sure that your fans are cycling.  Next, check to make
sure that you have a minimum delta T of 20 between room set point and
supply air temperature.  These are the 2 biggest things affecting the
unmet hours.

 

Amber

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Martz,
Amanda
Sent: Wednesday, July 21, 2010 1:22 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Ashrae Baseline Model & Unmet loads

 

I have several VAV units with reheat serving several zones in my Ashrae
baseline model. It is autosizing all of the capacities, so why would I
have unmet loads? I have cooling and heating set to size at 1.15 and
1.25 as Ashrae states, and I have cooling control set to "warmest." I'm
sure it is a control issue, but I can't figure out what exactly it is. I
attached my model, any help would be very greatly appreciated!

 

Amanda E. Martz, EIT, LEED AP

Mechanical Engineer

KlingStubbins

2301 Chestnut Street
Philadelphia, Pennsylvania
19103

P 215.569.2900, ext. 3612

F 215.569.5963
E amartz at klingstubbins.com 
W www.klingstubbins.com <http://www.klingstubbins.com/> 

 

 

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