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<p class="MsoNormal"><span style="">Hi all,<br>
The project is an New construction office building with a 30 tons
ground source heat pump with a
back-up boiler and Hybrid Hydronic Heat Pumps at zone level (total
cooling
capacity is 110 tons).</span></p>
<p class="MsoNormal"><span style="">In EE4, when you model the plant as
Combination Ground Source Heat Pump/Boiler,
you can’t choose a hydronic heat pump as system. So I modeled HHHPs as
4-pipe
fan-coils. In heating mode, this will fairly represent the operation of
the
HHHPs (no condenser/compressor work) but in cooling mode it doesn’t.</span></p>
<p class="MsoNormal"><span style=""> DOE 2.1 converts the GSHP
to an equivalent centrifugal chiller and electric boiler (with a
modified
COP).<span style=""> </span>The problem here is that heat
rejected by the chiller in cooling mode is not shared with the loop and
cannot
be used for space heating. The other issue is the
loop temperatures. HHHP operate at a lower temperature than standard
HPs.</span></p>
<p class="MsoNormal"><span style="">How can you account
for heat sharing in this case? </span></p>
<p class="MsoNormal"><span style="">Anyone has a
workaround for this situation?<br>
Thanks <br>
<br>
</span></p>
<pre class="moz-signature" cols="72">Hayssam Barhoun, LEED AP, Ing.
Chargé de projet - Energy
Montreal, Qc (H1S-1N2)
Tel.: (514)257-9389 ext. 271
Fax : (514)257-6090
email: <a class="moz-txt-link-abbreviated" href="mailto:hebarhoun@ges-int.com">hebarhoun@ges-int.com</a> </pre>
<br>
On 16/09/2010 3:01 PM, <a class="moz-txt-link-abbreviated" href="mailto:bldg-sim-request@lists.onebuilding.org">bldg-sim-request@lists.onebuilding.org</a> wrote:
<blockquote
cite="mid:mailman.1.1284663665.18975.bldg-sim-onebuilding.org@lists.onebuilding.org"
type="cite">
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Today's Topics:
1. CFD w/ Ecotect and Winair4 / NIST FDS (<a class="moz-txt-link-abbreviated" href="mailto:Shariq_Ali@URSCorp.com">Shariq_Ali@URSCorp.com</a>)
2. Re: PLR for PRTU furnaces (Carol Gardner)
3. Re: PLR for PRTU furnaces (James V Dirkes II, PE)
4. Re: Modeling a Green Roof (Lopez, Phylroy)
5. Re: CFD w/ Ecotect and Winair4 / NIST FDS (jyotirmay mathur)
6. Re: CFD w/ Ecotect and Winair4 / NIST FDS
(Raoni Ven?ncio dos Santos Lima)
7. MINIMUM VENTILATION RATE FOR OFFICES IN JAPAN (Luis P?rez-Lombard)
8. Direct/Diffuse Radiation Model (Reinhart, Christoph)
9. Frameless Windows (Jon Matthews)
10. Re: Direct/Diffuse Radiation Model (D. Charlie Curcija)
11. Re: Direct/Diffuse Radiation Model (David Bradley)
12. Re: Frameless Windows (Chris Jones)
13. Re: Frameless Windows (David Eldridge)
14. Re: Frameless Windows (Mehta, Gaurav)
15. Exterior Gas Powered Torches (Chris)
16. Re: Exterior Gas Powered Torches (Carol Gardner)
17. Re: Exterior Gas Powered Torches (Bishop, Bill)
18. Re: Exterior Gas Powered Torches (Christopher Zabaneh)
19. Job Posting - Harley Ellis Devereaux (`Careers Los Angeles)
----------------------------------------------------------------------
Message: 1
Date: Wed, 15 Sep 2010 15:07:03 -0400
From: <a class="moz-txt-link-abbreviated" href="mailto:Shariq_Ali@URSCorp.com">Shariq_Ali@URSCorp.com</a>
To: <a class="moz-txt-link-abbreviated" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a>
Subject: [Bldg-sim] CFD w/ Ecotect and Winair4 / NIST FDS
Message-ID:
<a class="moz-txt-link-rfc2396E" href="mailto:OF5B98D9DE.335945C6-ON8525779F.00683CDE-8525779F.0069020C@urscorp.com"><OF5B98D9DE.335945C6-ON8525779F.00683CDE-8525779F.0069020C@urscorp.com></a>
Content-Type: text/plain; charset="us-ascii"
What does the community think of mechanical / energy engineers running
airflow studies of air movement around and inside buildings using
Autodesk's Ecotect and Winair4 or NIST FDS? (If an individual can get the
programs to play together)
I touched on CFD and FEA in college and remember there is quite a bit to
it, epically when it comes to assumptions and boundary conditions.
Can a mechanical / energy engineer adequately analyze air movement in and
around a building with out training in CFD?
Or do you feel that this is an analysis that is best left for people who do
CFD simulations regularly?
Keep in mind that Ecotect and Winair4 and NIST FDS are limited in their
analysis capabilities, so we can limit the scope of this question to only
analyzing air movement due to wind / pressure in and around a building.
NIST FDS uses LES, I am not certain what Winair4 uses.
Regards,
Shariq
Shariq Ali EIT, LEED AP BD+C
Mechanical Engineer
URS Corporation
1375 Euclid Ave. Suite 600
Cleveland, OH 44115
Direct: 216.622.2276
Fax: 216.622.2428
This e-mail and any attachments contain URS Corporation confidential
information that may be proprietary or privileged. If you receive this
message in error or are not the intended recipient, you should not retain,
distribute, disclose or use any of this information and you should destroy
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Message: 2
Date: Wed, 15 Sep 2010 14:09:48 -0700
From: Carol Gardner <a class="moz-txt-link-rfc2396E" href="mailto:cmg750@gmail.com"><cmg750@gmail.com></a>
To: Morgan Heater <a class="moz-txt-link-rfc2396E" href="mailto:morgan@ecotope.com"><morgan@ecotope.com></a>
Cc: <a class="moz-txt-link-abbreviated" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a>
Subject: Re: [Bldg-sim] PLR for PRTU furnaces
Message-ID:
<a class="moz-txt-link-rfc2396E" href="mailto:AANLkTi=2N7ozTuKfewzercRUUrFBb0t5t1dZSqi798kh@mail.gmail.com"><AANLkTi=2N7ozTuKfewzercRUUrFBb0t5t1dZSqi798kh@mail.gmail.com></a>
Content-Type: text/plain; charset="iso-8859-1"
I'd ask your local rep for data or go online and look for Technical
Specifications for the manufacturer. You can usually find them there.
Carol
On Wed, Sep 15, 2010 at 11:49 AM, Morgan Heater <a class="moz-txt-link-rfc2396E" href="mailto:morgan@ecotope.com"><morgan@ecotope.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap=""> Does anyone have a good source for part load performance curves for the
heating section of gas pack RTUs? Thanks.
Morgan Heater, PE, LEED AP
Ecotope, Inc
(206) 322-3753 x209
4056 9th Avenue NE
Seattle, WA 98105
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</pre>
</blockquote>
<pre wrap="">
</pre>
</blockquote>
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