[Bldg-sim] Equest Cooling Desing Day

[Andrew Craig]

Steve---

 

I only know of creating design days in the Detailed Edit mode, but it's
not hard.  Click on the Project and Site tab to bring up its window pane
and then right click on the top line that says "Project: ...(whatever
your project name is)".  One of the options is "Create Design Day..."
and you can specify whether it's heating or cooling.  

 

Good luck.

 

Andrew Craig, EIT,LEED AP/ Mechanical Designer 
INTERFACE ENGINEERING 
direct 503.382.2696 

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of STEVE
SAMENSKI
Sent: Monday, March 03, 2008 7:13 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Equest Cooling Desing Day

 

I'm hoping someone can help me figure out how to get eQuest to perform a
unit sizing according to a user-defined cooling design day as opposed to
the hourly weather data.

Situation: I'm modeling a four-story residential building in West Palm
Beach, FL where each apartment uses a split system.  I'm getting an odd
situation where eQuest tells me the peak cooling load is being set in
January, and while I haven't 100% figured that one out, I suspect if I
tell the program to size the unit based on a cooling design day derived
from ASHRAE data then that issue will go away.

Problem: I can't figure out how to define the outside air conditions for
the cooling design day.

I know there was a recent discussion on using eQuest to do equipment
sizing, but I can' find that discussion on the archives.  Here's what I
have figured out:

*	If you're modeling a location outside California, you have to
manually input temperatures and humidity for the design day.  These are
going to be worse than probably anything in the weather data file
because they're extremes (the ASHRAE 97.5% or similar). 
*	eQuest lets you define "CDD" schedules where you can specify
percentages for occupancy, lighting, misc equipment, etc.  I know how to
do this.


So where do I go in eQuest to define my cooling design day exterior
conditions?  Is it in the Wizard?  Do I do it via Detailed Data
interface?  Do I have to go all the way out to the BDL file, alter it in
a text editor, and then run DOE2 separately from eQuest?  (I haven't
figured out how to make changes to a BDL and run it in eQuest without
eQuest overwriting any of my changes.)

Help.  Please.

Steve Samenski PE
Engineering Manager
The Spinnaker Group, Inc.
786-385-3510
www.thespinnakergroupinc.com <http://www.thespinnakergroupinc.com> 
Become the solution... Join the USGBC!

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