I do not believe we are double discounting. Try this: think of when you turn your computer on and off however you do so during the day, lets say on at 9 am off at noon on at 1 pm off at 5 pm. That is your schedule. Now think of how when you walk away from your computer for any length of time and it goes into sleep mode, that's your diversity. <br>
<br>Comments, thoughts are welcome. Is this what you were maybe getting at with the multiplier, Nick.<br><br>Waiting to learn more,<br>Carol<br><br><div class="gmail_quote">On Wed, May 5, 2010 at 10:02 AM, Yuvaraj Saravanan <span dir="ltr"><<a href="mailto:Yuvaraj.Saravanan@arup.com">Yuvaraj.Saravanan@arup.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Hi Carol,</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">This question is not specific to equest. Would you apply a
diversity as well as a schedule for process load? I thought by applying a schedule
we are accounting for diversity. By applying a diversity and then a schedule
are we not double discounting the load?</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Regards,</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Yuvaraj</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Carol
Gardner<br>
<b>Sent:</b> Tuesday, May 04, 2010 11:15 PM<br>
<b>To:</b> Gaurav Mehta<br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><div><div></div><div class="h5"><br>
<b>Subject:</b> Re: [Equest-users] Process Equipment Power Consumption</div></div></span></p>
</div><div><div></div><div class="h5">
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="margin-bottom: 12pt;">Whenever you have an equipment,
aka process, load it is proper to apply first a diversity factor, aka % on at
one time, and then a schedule. Whether your building is new or existing doesn't
matter. This is an Art not a Science. Experience is the primary teacher. You
can always ask us old farts. We are relevant and have information that one only
can get with time. Yours to chose to listen to or not.<br>
<br>
Peace out,<br>
Carol</p>
<div>
<p class="MsoNormal">On Mon, May 3, 2010 at 9:20 PM, Gaurav Mehta <<a href="mailto:gmehta75@gmail.com" target="_blank">gmehta75@gmail.com</a>> wrote:</p>
<p class="MsoNormal">Please refer to the Chapter 18, Nonresidential Cooling and
Heating Load Calculations of the 2009 ASHRAE Handbook of Fundamentals.<br>
<br>
<br>
Best regards,<br>
<br>
Gaurav Mehta<br>
<br>
Stantec<br>
<br>
<br>
--------------------------------------------------<br>
From: "Walson, Kristy" <<a href="mailto:kristy.walson@tlc-eng.com" target="_blank">kristy.walson@tlc-eng.com</a>><br>
Sent: Monday, May 03, 2010 11:29<br>
To: <<a href="mailto:omoltay@mimtarch.com" target="_blank">omoltay@mimtarch.com</a>>;
<<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>><br>
Subject: Re: [Equest-users] Process Equipment Power Consumption</p>
<div>
<div>
<blockquote style="border-width: medium medium medium 1pt; border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color rgb(204, 204, 204); padding: 0in 0in 0in 6pt; margin-left: 4.8pt; margin-right: 0in;">
<p class="MsoNormal" style="margin-bottom: 12pt;"> </p>
<p class="MsoNormal" style="margin-bottom: 12pt;">Hi Omer,<br>
<br>
On recent projects, I have had to pay more attention to the process loads for
the types of equipment you mentioned below. In the past, I would just
ensure that my process energy cost was 25% of the total energy cost because I
knew that the types of buildings I was modeling (commercial offices, mostly)
would never have an actual process load even close to 25%.<br>
<br>
However, recently I have been modeling process loads in a more exact way. What
I do is I take the kW rating of the equipment, then I talk to the electrical
engineer to get an idea of whether that equipment will ever run at its rated
load and, if not, I apply the appropriate reduction to it based on what the
electrical engineer says.<br>
<br>
Once I have this maximum energy use for process loads in the building, I then
create a custom schedule for this process energy. Sometimes I need to
create more than one custom schedule based on the type of equipment in the
space. This can become very tedious if you get too far into the weeds, so
I try to keep the schedules realistic, but simple and I keep the number of
different custom schedules I create to a minimum. As we all know, you can
never know the actual occupancy and use schedule of a building until it is
occupied for a certain period of time, so keep your assumptions simple and
logical.<br>
<br>
I'd love to hear what other folks are doing if it differs from my process.<br>
<br>
Kristy Walson, PE, LEED AP<br>
Mechanical Engineer / Sustainable Design<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>]
On Behalf Of <a href="mailto:omoltay@mimtarch.com" target="_blank">omoltay@mimtarch.com</a><br>
Sent: Monday, May 03, 2010 1:46 PM<br>
To: <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
Subject: [Equest-users] Process Equipment Power Consumption<br>
<br>
Dear All,<br>
<br>
One of the things that cause most trouble for us in modelling is the power<br>
consumption of equipment such as dishwashers, ovens, food warm-up<br>
equipment and so on that have varying levels of power consumption during<br>
operation (even PCs and laptops). We are sometimes using nameplate<br>
installed kW values, but deep inside we know that this is quite wrong -<br>
but we have no other more reliable source / guideline for such equipment.<br>
I would appreciate any feedbacks on how others are modelling such<br>
equipment.<br>
<br>
Thank you,<br>
<br>
Omer Moltay, LEED AP<br>
Mimta<br>
<br>
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