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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">Bruce and all,</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">Thanks for your input below, I will definitely take breaking out server space into additional zones per expansion phase into consideration.</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">Regarding process energy, my understanding is that there is a mechanism for showing process energy reduction via the exceptional calculation
method per ASHRAE 90.1 ( See LEED-NC 2009 EAp2 pg 238 paragraph 2 and EAc1 p258 2<sup>nd</sup> to last paragraph of Option 1). Admittedly, I have never used an exceptional calculation to show process energy production, but it seems that it is possible. As
mentioned in my second post, I came across a CIR that approved using Server Virtualization as means to show process reduction for a data center (Copied Below). We have submitted a CIR to confirm that this would be possible solution for the project, but have
not received the response yet. </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">The CIR is for an existing data center so the baseline would have been existing equipment. In my case, I am operating under the premise
that standard servers for the baseline would not adopt Virtualization. Though, to honest, I don’t know if Virtualization for a new datacenter would actually save as much energy as claimed below. I think an argument could be made that Virtualization allows
for higher performance machines that use more energy to being packed into the same amount of space. The energy reduction would be realized at part load when a single “Virtualized server” could support the tasks of several, allowing those units to be turned
off. I don’t know enough about servers to comment much beyond this at this time.
</span></font></p>
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">It sounds like you do a fair bit of datacenter modelling, so perhaps the above could be of value to your projects as well.
</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">I would appreciate if anyone has any experience to share or comments on using exceptional calculations for process energy reductions.</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">CIR 2441</span></font></p>
<p class="MsoNormal" style="margin-left:21.75pt"><font size="2" color="#5f6264" face="Arial"><span style="font-size:11.0pt; font-family:Arial; color:#5F6264"> </span></font><font size="2" color="#5f6264" face="Arial"><span style="font-size:11.0pt; font-family:Arial; color:#5F6264">Ruling
</span></font><font size="2" color="#5f6264" face="Arial"><span style="font-size:11.0pt; font-family:Arial; color:#5F6264">[
<input type="image" src="https://www.usgbc.org/images/LI/Minus.GIF" name="ctlLISearch$rptResults$ctl00$Image2"> ]
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
<p class="MsoNormal" style="margin-left:21.75pt"><font size="2" color="#5f6264" face="Arial"><span style="font-size:11.0pt; font-family:Arial; color:#5F6264">The applicant may use the Exceptional Calculation Method to take credit for any energy savings available
from the server virtualization technology. Be sure to include as supporting documentation under EAc1 all assumptions made in the calculations, detailed data, any actual measurements taken to support the savings claims and any other pertinent information. Please
note that the actual amount of credit will be determined by the review team at the time of the review.</span></font></p>
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<p class="MsoNormal"><font size="2" color="#5f6264" face="Arial"><span style="font-size:11.0pt; font-family:Arial; color:#5F6264">This project is a remodeling of an existing office building that will include the addition of a Data Center. The Data Center will
make extensive use of server virtualization to save energy, space and money. Server virtualization is the technique of replacing multiple servers with one server running multiple "virtual servers" on one larger, high performance server. In their existing Data
Center, our client runs an average of 8 virtual servers on each high-performance server. Although the high performance server uses more energy than any one of the low to medium performance servers that it replaces, this results in a net energy savings of between
60-75%. Our question is: Under EAc1, Option 1, may we use the Exceptional Calculation Method to model the energy savings accountable to server virtualization?</span></font></p>
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">Thanks in advance and regards,</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy">Shuichi</span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt; font-family:Arial; color:navy"> </span></font></p>
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<p class="MsoNormal"><b><font size="2" color="black" face="Tahoma"><span lang="EN-US" style="font-size:10.0pt; font-family:Tahoma; color:windowtext; font-weight:bold">From:</span></font></b><font size="2" color="black" face="Tahoma"><span lang="EN-US" style="font-size:10.0pt; font-family:Tahoma; color:windowtext">
Bruce Easterbrook [mailto:bruce5@bellnet.ca] <br>
<b><span style="font-weight:bold">Sent:</span></b> Tuesday, June 21, 2011 1:25 AM<br>
<b><span style="font-weight:bold">To:</span></b> Will Mak<br>
<b><span style="font-weight:bold">Cc:</span></b> Shuichi Hendrickson; Patrick Keeney; equest-users@lists.onebuilding.org<br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [Equest-users] Data Center Modelling and Ice Storage (2)</span></font><font color="black"><span lang="EN-US" style="color:windowtext"></span></font></p>
</div>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p>
<p class="MsoNormal"><font size="4" color="black" face="Times New Roman"><span style="font-size:13.5pt">Correct, you need to model them but they normally don't vary between the 2 models, just accounted for. LEED does assess how efficiently your system deals
with them for certain process loads in certain buildings. I was describing a "industrial type" process load which a big data centre is similar to.</span></font>
<font size="4"><span style="font-size:13.5pt">LEED doesn't really get into this territory or give credits for it as far as the "industrial" process load. Now Google is very interested in it because it impacts their profitability. LEED is more concerned with
the commercial market where first cost rules and down and dirty is the norm. Traditionally this sector did not pay much (any?) attention to operating cost. LEED is trying to encourage longer term thinking when a building is designed and built. Industry
normally thinks long term and includes operating cost in their analysis over the life cycle of the process. With the increase in the cost of energy plus the needs of utility companies to reduce their peak loads or reduce the rate of expansion of this peak
load it makes sense for the government and all the players to be on the "team". There is a disconnect in the commercial sector to many of the market forces which would encourage better design. There is also a huge stock of old properties to be re-furbished.
This sector consumes a large chunk of the nations energy.<br>
Bruce <br>
<br>
<br>
</span></font>On 20/06/2011 11:37 AM, Will Mak wrote: </p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)"><font size="2" color="black" face="Segoe UI"><span style="font-size:10.0pt; font-family:"Segoe UI"">Where does it say LEED does not deal with process loads? It states that you must model the process loads
anticipated on the design on both proposed design and baseline models.</span></font></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)"><font size="2" color="black" face="Segoe UI"><span style="font-size:10.0pt; font-family:"Segoe UI""> </span></font></span></p>
<div>
<p class="MsoNormal"><b><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt; font-weight:bold">William Mak, LEED AP BD+C</span></font></b><font size="1"><span style="font-size:9.0pt"><br>
</span></font><font size="1"><span style="font-size:8.0pt">Mechanical Design Engineer</span></font><font size="1" face="Segoe UI"><span style="font-size:9.0pt; font-family:"Segoe UI""><br>
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<p class="MsoNormal"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt; font-family:Tahoma; color:windowtext; font-weight:bold">From:</span></font></b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt; font-family:Tahoma; color:windowtext">
Bruce Easterbrook [<a href="mailto:bruce5@bellnet.ca">mailto:bruce5@bellnet.ca</a>]
<br>
<b><span style="font-weight:bold">Sent:</span></b> Monday, June 20, 2011 10:22 AM<br>
<b><span style="font-weight:bold">To:</span></b> Shuichi Hendrickson<br>
<b><span style="font-weight:bold">Cc:</span></b> Will Mak; Patrick Keeney; <a href="mailto:equest-users@lists.onebuilding.org">
equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [Equest-users] Data Center Modelling and Ice Storage (2)</span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p>
<p class="MsoNormal"><font size="4" color="black" face="Times New Roman"><span style="font-size:13.5pt">LEED doesn't deal with process loads. Typically it is not something you can have much effect on. The process defines how much heat you have to deal with
and normally it is not negotiable. Economically your main technique is to load shift. Time of use electrical billing (TOU) if in effect will further reinforce this technique. If you have cheap natural gas available and a large enough load absorption chillers
become an option as well. Economizer use and free cooling can be very effective. As far as your project goes and myself knowing very little about the actual project you seem to be on the right track. You are using a legitimate technique to load shift.
There aren't really any "rules" except to design an energy efficient system which is inexpensive to run. As far as your set up of your model I would use zones to correspond to the planned expansions. Your first zone would represent Day 1 conditions without
any techniques used to reduce server loads. Your last will correspond to the full design. You will need to get some idea of how they plan to expand and enhance the server performance but just start with a plain baseline for them. Looking at your unit combinations
I would go with more zones myself, break down Day one conditions into 2 or 3 zones. It is easier to combine zones later than try to add more. You will probably be able to provide input on their proposed expansion plan and the timing as well once you have
a model running. You want to keep your model flexible so it is easy to adjust as you learn more about the system without having to start over. Because there are discrete equipment sizes both for HVAC systems and servers you could assist in planning the expansions
by optimizing the size of each addition and by having a certain amount of over capacity to handle smaller additions to the servers without adding to the HVAC system. You would also optimize the size of the extra capacity to minimize inefficiencies in the
part load running. You would be able to add their strategies for reducing the process load to the model. Make sure you keep a copy of the model before you start to run different ideas. Some things suggested may require you to back up to the base model.
With copies along your process you just jump back to where you need to restart your model creation without going right back to the beginning. Servers are a little different from people. You have to remove all the heat all the time. They have to be operational
24/7 no if ands or buts, 100% up time.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
</span></font><br>
On 20/06/2011 01:24 AM, Shuichi Hendrickson wrote: </p>
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<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">Patrick, Will, John and all</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">Thank you all for the quick responses to my original post.</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">Based on your comments, I have a couple more questions that I hope someone may have insight into.</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">It seems that due to the large process equipment energy usage for datacenters, others have experienced that showing significant energy reduction
through HVAC alone is difficult. Following from this, for the purposes of LEED it appears that is would be best to find some strategy to minimize process loads in the model or somehow show a process load reduction.</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">1) For the project I am working on, we are starting off with 3 X 600RT CWH chillers + 2 X 600RT dual mode (CHW and Ice) chillers on Day 1, but
with an additional 1 x 600RT CHW + 2 X 600RT dual mode units are planned for full future design cooling capacity. Correspondingly, the Server (process equipment) will be installed in stages as well.
</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">Does anyone know what if there are any rules as to what point in project development the model should be based on? My original plan was to model
at full design capacity, but I am thinking now that it would be better to model Day 1 conditions if permissible to lower the denominator in the energy reduction calculation.</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">2) The client is considering using Server Virtualization technology for the IT equipment. I understand that this is a much more efficient means
of operating server equipment and I am considering using this as a basis for showing process energy reduction based on a CIR I have come across (CIR 2441). The CIR was originally submitted for a remodelling project, so the process reduction would have been
shown versus the originally installed equipment. </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">Does anyone have any thought or experience any with showing this type of process reduction for a LEED-NC project? I am imagining the baseline
will be based on servers without virtualization. I don’t really know enough about “Virtualization” at this stage to really quantify what energy reduction, if any, could be expected. Some long conversations with the IT designer are warranted, but would appreciate
if any one has any thoughts to share.</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">Again, any thoughts will be greatly appreciated.</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">Thanks in advance,</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt">Shuichi</span></font></p>
<p class="MsoPlainText"><font size="2" color="black" face="Courier New"><span lang="EN-GB" style="font-size:10.0pt"> </span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><b><font size="2" color="black" face="Times New Roman"><span lang="EN-GB" style="font-size:10.0pt; font-weight:bold">Shuichi Hendrickson</span></font></b></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="black" face="Times New Roman"><span lang="EN-GB" style="font-size:10.0pt">Environmental Engineer, LEED AP</span></span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"><br>
</span></font><b><font size="2" color="gray" face="Book Antiqua"><span lang="EN-GB" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray; font-weight:bold">ERM Japan</span></font></b></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="black" face="Times New Roman"><span lang="EN-GB" style="font-size:10.0pt">The Landmark Tower
</span></span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="black" face="Times New Roman"><span style="font-size:10.0pt">Yokohama</span></font><font size="2"><span style="font-size:10.0pt"> 19F</span></span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="black" face="Times New Roman"><span style="font-size:10.0pt">2-2-1-1, Minatomirai, Nishi-ku</span></span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="black" face="Times New Roman"><span lang="DE" style="font-size:10.0pt">Yokohama, 220-8119, Japan</span></span></font><span lang="DE"></span></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><font size="2" color="black" face="Arial"><span lang="DE" style="font-size:10.0pt; font-family:Arial"><br>
</span></font><font size="2"><span lang="DE" style="font-size:10.0pt">T:</span></font><span style=""><font size="2"><span lang="PT-BR" style="font-size:10.0pt"><a href="tel:%2B81%280%2945-640-3780" target="_blank"><span lang="DE">+81(0)45-640-3780</span></a></span></span></font><span style=""><font size="2"><span lang="DE" style="font-size:10.0pt">
<br>
F:</span></span></font><font size="2" color="gray" face="Book Antiqua"><span lang="PT-BR" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray"><a href="tel:%2B81%280%2945-640-3781" target="_blank"><span lang="DE">+81(0)45-640-3781</span></a></span></font><span style=""><font size="2"><span lang="DE" style="font-size:10.0pt"><br>
</span></font><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial"><a href="mailto:shuichi.hendrickson@erm.com" target="_blank" title="mailto:shuichi.hendrickson@erm.com
mailto:first.lastnamemasashi.hishiyama@erm.com
mailto:first.lastname@erm.com"><span lang="DE">shuichi.hendrickson@erm.com</span></a></span></font><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">
</span><span lang="DE"><br>
</span></span></font><font size="2" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"><a href="http://www.erm.com/" target="_blank" title="http://www.erm.com/"><span lang="DE">www.erm.com</span></a></span></font><font size="2" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">
</span></font><span lang="DE"></span></p>
<p class="MsoNormal"><i><font size="2" color="gray" face="Book Antiqua"><span lang="EN-GB" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray; font-style:italic">Ranked No1 All-Environmental Firm: ENR Magazine (2004, 2005, 2006, 2007)<br>
Environmental Adviser of the Year: Acquisitions Monthly (2005, 2006, 2008)</span></font></i></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><font size="1" color="teal" face="Webdings"><span style="font-size:8.0pt; font-family:Webdings; color:teal">P</span></font><font size="1" color="teal" face="ＭＳ ゴシック"><span style="font-size:8.0pt; font-family:"MS Gothic"; color:teal">
</span></font><font size="1" color="teal" face="Arial"><span style="font-size:8.0pt; font-family:Arial; color:teal">Please consider the environment before printing this email</span></font></p>
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<p class="MsoNormal"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt; font-family:Tahoma; font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt; font-family:Tahoma"> Will Mak [<a href="mailto:wmak@epsteinglobal.com">mailto:wmak@epsteinglobal.com</a>]
<br>
<b><span style="font-weight:bold">Sent:</span></b> Friday, June 17, 2011 11:15 PM<br>
<b><span style="font-weight:bold">To:</span></b> Patrick Keeney; Shuichi Hendrickson<br>
<b><span style="font-weight:bold">Cc:</span></b> <a href="mailto:equest-users@lists.onebuilding.org">
equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: [Equest-users] Data Center Modelling and Ice Storage</span></font></p>
</div>
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<p class="MsoNormal"><font size="2" color="black" face="Times New Roman"><span style="font-size:10.0pt">Side note that you may want to keep in mind that’s been brought up here is how you model the data center process loads. If the loads are too large, you may
have a difficult time meeting the prerequisite. </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Times New Roman"><span style="font-size:10.0pt"> </span></font></p>
<p class="MsoNormal"><b><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt; font-weight:bold">William Mak, LEED AP BD+C</span></font></b><font size="1"><span style="font-size:9.0pt"><br>
</span></font><font size="1" face="Segoe UI , sans-serif ;"><span style="font-size:8.0pt; font-family:"Segoe UI \, sans-serif \;"">Mechanical Design Engineer</span></font><font size="1" face="Segoe UI"><span style="font-size:9.0pt; font-family:"Segoe UI""><br>
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</span></font><b><font size="2"><span style="font-size:10.0pt; font-weight:bold">EPSTEIN</span></font></b><font size="1"><span style="font-size:9.0pt"><br>
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Engineering<br>
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<p class="MsoNormal"><font size="1" color="black" face="Segoe UI ; color: black;"><span style="font-size:8.0pt; font-family:"Segoe UI \; color\: black\;"">Sustainability<br>
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W:</span></font><font size="1"><span style="font-size:8.0pt"> <a href="http://www.epsteinglobal.com/">
<font color="#c75b12"><span style="color:#C75B12">www.epsteinglobal.com</span></font></a></span></font><font size="1" face="Segoe UI , sans-serif ;"><span style="font-size:9.0pt; font-family:"Segoe UI \, sans-serif \;""><br>
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Epstein is a firm believer in sustainability. We ask that you please consider the environment before printing this e-mail.</span></font></p>
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<div style="border:none; border-top:solid windowtext 1.0pt; padding:3.0pt 0mm 0mm 0mm">
<p class="MsoNormal"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt; font-family:Tahoma; font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt; font-family:Tahoma">
<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b><span style="font-weight:bold">On Behalf Of </span></b>Patrick Keeney<br>
<b><span style="font-weight:bold">Sent:</span></b> Friday, June 17, 2011 9:06 AM<br>
<b><span style="font-weight:bold">To:</span></b> Shuichi Hendrickson<br>
<b><span style="font-weight:bold">Cc:</span></b> <a href="mailto:equest-users@lists.onebuilding.org">
equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [Equest-users] Data Center Modelling and Ice Storage</span></font></p>
</div>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt">Hi Shuichi,</span></font></p>
</div>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt">Below is a link to an additional source from a previous post that helps explain how to model UFAD and/or displacement ventilation. Their method is very
similar to yours, in that you split the equipment loads between the plenum and the space. In particular, there is a section which explains pretty clearly how to model UFAD in eQUEST. This may be repeat info to you, but it may be able to help.
</span></font></p>
</div>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p>
</div>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt"><a href="http://www.archenergy.com/ieq-k12/Public/Proj2_Deliverables/D2.9c_FinalDVDesignGuide_2006-0630.pdf">http://www.archenergy.com/ieq-k12/Public/Proj2_Deliverables/D2.9c_FinalDVDesignGuide_2006-0630.pdf</a></span></font></p>
</div>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt">Best, Patrick</span></font></p>
</div>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt"><br>
<br>
</span></font></p>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt">On Fri, Jun 17, 2011 at 3:07 AM, Shuichi Hendrickson <<a href="mailto:Shuichi.Hendrickson@erm.com">Shuichi.Hendrickson@erm.com</a>> wrote:</span></font></p>
<div>
<div>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">Hello all,</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">I am attempting to model a data center in eQuest for LEED. This will be a first attempt at modelling a data center for me and I am
in hopes someone could provide some sage advice on the subject. </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">My understanding is that the data center will be a standard hot/cold aisle configuration with underfloor cooling (UFAD). The CRACs
are on CHW and the CHW plant consists of multiple chillers, as well as, dedicated chillers for ice storage.</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">Recognizing that eQuest doesn’t consider fluid air dynamics or temperature stratification resultant from UFAD, I am considering using
the UFAD modelling guidance in the EDR Design Guidelines: HVAC Simulation Guidance (<a href="http://www.energydesignresources.com/resources/publications/design-guidelines/design-guidelines-hvac-simulation-guidelines.aspx" target="_blank">http://www.energydesignresources.com/resources/publications/design-guidelines/design-guidelines-hvac-simulation-guidelines.aspx</a>)</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">This document addresses UFAD, but not specific to data center or hot/cold aisle. What Ive gotten out of the guidance is that for comfort
UFAD applications, the upper portion of a room (non occupied ) space is defined as plenum and the internal loadings for the room are apportioned between the occupied zone and plenum. It seems to me that this method could be appropriate for hot/cold aisle scenarios
as well, with the hot aisle as the plenum and cold as space. From the guidance equipments loads are suggested to be apportioned 67% space 33% plenum for comfort applications.
</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">My understanding of hot/cold aisle configurations is that cold air is supplied on the front side of the server racks, pulled through
the racks by the server internal cooling fans, and exhausted in to the hot aisle. Following from this logic it seems to me that the equip load should apportioned mostly to the plenum (hot aisle).
</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">Does anyone have a better suggestion for load proportioning for a datacenter? Am I over complicating this?</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">My next challenge is modelling the Ice storage. I have 6 chillers of which 2 are dual mode CHW and Ice making. My guess is that I will
have to model the dual mode units as 4 chillers (2 for CHW and 2 for ice) because of the different efficiencies and supply temps, while somehow using to the equip controls to make sure the chillers are not operating simultaneously.
</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">This will be another first attempt for me. If anyone knows of any useful modelling guidance docs or has any advice on this it would
be highly appreciated.</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">Thank you in advance and regards,</span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"> </span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><b><font size="2" color="black" face="Times New Roman"><span lang="EN-GB" style="font-size:10.0pt; font-weight:bold">Shuichi Hendrickson</span></font></b></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="gray" face="Book Antiqua"><span lang="EN-GB" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray">Environmental Engineer, LEED AP</span></span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><font size="2" color="black" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"><br>
</span></font><b><font size="2" color="gray" face="Book Antiqua"><span lang="EN-GB" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray; font-weight:bold">ERM Japan</span></font></b></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="gray" face="Book Antiqua"><span lang="EN-GB" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray">The Landmark Tower
</span></span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="gray" face="Book Antiqua"><span style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray">Yokohama</span></font><font size="2" color="gray" face="Book Antiqua"><span style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray">
19F</span></span></font></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="gray" face="Book Antiqua"><span lang="PT-BR" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray">2-2-1-1, Minatomirai, Nishi-ku</span></span></font><span lang="PT-BR"></span></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><span style=""><font size="2" color="gray" face="Book Antiqua"><span lang="PT-BR" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray">Yokohama, 220-8119, Japan</span></span></font><span lang="PT-BR"></span></p>
<p class="MsoNormal" style="text-align:justify; text-justify:inter-ideograph"><font size="2" color="black" face="Arial"><span lang="PT-BR" style="font-size:10.0pt; font-family:Arial"><br>
</span></font><font size="2" color="gray" face="Book Antiqua"><span lang="PT-BR" style="font-size:10.0pt; font-family:"Book Antiqua"; color:gray">T:<a href="tel:%2B81%280%2945-640-3780" target="_blank">+81(0)45-640-3780</a>
<br>
F:<a href="tel:%2B81%280%2945-640-3781" target="_blank">+81(0)45-640-3781</a><br>
</span></font><font size="2" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"><a href="mailto:shuichi.hendrickson@erm.com" target="_blank" title="mailto:shuichi.hendrickson@erm.com
mailto:first.lastnamemasashi.hishiyama@erm.com
mailto:first.lastname@erm.com"><span lang="PT-BR">shuichi.hendrickson@erm.com</span></a></span></font><font size="2" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">
</span></font><font size="2" face="Arial"><span lang="PT-BR" style="font-size:10.0pt; font-family:Arial"><br>
</span></font><font size="2" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial"><a href="http://www.erm.com/" target="_blank" title="http://www.erm.com/"><span lang="PT-BR">www.erm.com</span></a></span></font><font size="2" face="Arial"><span lang="EN-GB" style="font-size:10.0pt; font-family:Arial">
</span></font><span lang="PT-BR"></span></p>
<p class="MsoNormal"><i><font size="2" color="black" face="Times New Roman"><span lang="EN-GB" style="font-size:10.0pt; font-style:italic">Ranked No1 All-Environmental Firm: ENR Magazine (2004, 2005, 2006, 2007)<br>
Environmental Adviser of the Year: Acquisitions Monthly (2005, 2006, 2008)</span></font></i></p>
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