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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>Sherie - I'll do my best. The majority of our energy
models are for the sole purpose of performing an Energy Life Cycle Cost Analysis
for schools and other government funded buildings here in Washington State.
These reports are used to aid the owner in making decisions
regarding envelope design, HVAC systems, lighting controls and power density,
etc. that best suit their needs. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>1. SD - Providing we have adequate building layouts
from the Architect.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>2. Rules of thumb system sizing and Industry Standards.
If equipment schedules are completed we use those. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>3. eQuest.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>4. We normally build 1 model in the design wizard that
includes all systems to be studied in the report (normally 4 systems includeing
an ASHRAE G baseline). Then each system gets modeled seperately using this main
model as a starting point. Normally it takes 40 hours to get this starting model
built with all utility rates, schedules, envelope parameters, etc. established
for the project. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>5 & 6. Another 40 - 60 hours is spent developing
the 4 seperate models for HVAC system types to be studied, fine tuning each
model, and anaylizing the outputs. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>7. If you start a project in SD you have to understand
that it is a snap-shot in time. How it compares to the CD varies greatly.
</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>We are also writing a report with a very specific
layout/guideline to follow. The hours for writing the report are not included
here. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=734463418-06042009>As other people have stated hours can vary greatly but
on average we are able to complete our models/simulations within these ranges.
</SPAN></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Sherie E.
Hensley<BR><B>Sent:</B> Wednesday, April 01, 2009 10:46 AM<BR><B>To:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> [Bldg-sim] How long it takes
for energy modeling? HME<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>I have done
several energy models over the last few years using Trane Trace. I have
heard others (typically from those who don't have experience with energy
modeling) say "it only takes a day" to create an energy model and get
results. </FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>I am trying
to get a better understanding of how long it takes others to complete an energy
model. I realize there are many factors involved and length of time can
vary drastically given the complexity of the project.</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>For an xxx
sq ft project with xxx systems:</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>1.
What phase are you starting the energy model - SD, DD, CD?</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>2.
What information are you starting with - load results from another program,
rules of thumb for system sizing, etc?</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>3.
What program are you using?</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>4.
How long does it take to build the proposed model?</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>5.
How long does it take to build the baseline model (per ASHRAE 90.1-2004,
Appendix G)?</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>6.
How long does it take to calculate the results from the energy simulation
program?</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>7. If
you have started a projected in the SD phase, how detailed is the input
information you use? How do the results compare to the energy model
developed in CD - within 10%?</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>Any
information you can provide would be helpful.</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial
size=2>Thanks,</FONT></SPAN></P>
<P align=left><SPAN class=784422912-10022009><FONT face=Arial size=2>Sherie
Hensley</FONT></SPAN></P></DIV></BODY></HTML>