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<p>Amit,</p>
<p> There is a component in the TESS Utility library (Type572:
equipment fouling) that was designed for this purposes. The
disadvantage of it is that you have to define the reduction in
production efficiency as a function of the dust. However, once you
do the component will linearly degrade component performance and
will then account for periodic cleanings.</p>
<p> If you do not have access to that component you are probably
best multiplying the performance of the PV by a performance
reduction factor using an equation.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 01/29/2018 03:17, Amit Verma via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAGJ6am+kBiSDSK_wkHpbA83c9evQqkf6UHEkrgm=wS9es0a32A@mail.gmail.com">
<div dir="ltr">Hello Everyone,
<div><br>
</div>
<div>I am doing a project on type 94 (PV Module) . I have to
find dust effect on PV module's Efficiency. Please suggest me
how to enroll it with PV module .</div>
<div><br>
</div>
<div><br>
</div>
<div>Kind Regards</div>
<div>Amit Verma</div>
<div><br>
</div>
</div>
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<div class="gmail_quote">On Thu, Jan 25, 2018 at 6:00 AM, <span
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wrote:<br>
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Today's Topics:<br>
<br>
1. airchange between zones (Alex moreno)<br>
2. Re: airchange between zones (David BRADLEY)<br>
<br>
<br>
---------- Forwarded message ----------<br>
From: Alex moreno <<a
href="mailto:alamoreno19@hotmail.com"
moz-do-not-send="true">alamoreno19@hotmail.com</a>><br>
To: trnsys_users <<a
href="mailto:trnsys-users@lists.onebuilding.org"
moz-do-not-send="true">trnsys-users@lists.onebuilding.org</a>><br>
Cc: <br>
Bcc: <br>
Date: Wed, 24 Jan 2018 14:22:02 +0000<br>
Subject: [TRNSYS-users] airchange between zones<br>
Hi<br>
<br>
I have a doubt when i modeling a single family building with
two floors,<br>
how i can connect the airchange between of two zones (first
floor and<br>
second floor)<br>
<br>
another doubt is:<br>
<br>
Firstly i simulated the two floors us one zones, but now i
simulate the<br>
buildign us two zones, the results of heating differ 2%
respec of one<br>
zone building and differ cooling 10%, it is normally?<br>
<br>
regards<br>
<br>
<br>
Alex<br>
<br>
<br>
<br>
---------- Forwarded message ----------<br>
From: David BRADLEY <<a
href="mailto:d.bradley@tess-inc.com"
moz-do-not-send="true">d.bradley@tess-inc.com</a>><br>
To: "TRNSYS users mailing list at OneBuilding.org" <<a
href="mailto:trnsys-users@lists.onebuilding.org"
moz-do-not-send="true">trnsys-users@lists.onebuilding.org</a>><br>
Cc: Alex moreno <<a href="mailto:alamoreno19@hotmail.com"
moz-do-not-send="true">alamoreno19@hotmail.com</a>><br>
Bcc: <br>
Date: Wed, 24 Jan 2018 16:49:40 -0600<br>
Subject: Re: [TRNSYS-users] airchange between zones<br>
Alex,<br>
<br>
When you define an ADJACENT wall (or floor/ceiling)
between two zones you have the ability to define a coupling
air flow rate from each to the other. You can set the flow
rate as a constant, as a scheduled value, or as an input.
Type56 leaves it to you to determine how much air flows back
and forth between the zones.<br>
<br>
The most correct way of determining the quantity of
airflow is to use an airflow modeling tool such as TRNFlow
or Type97/CONTAM.<br>
<br>
It is hard to answer your second question. The answer
depends on what metrics you are looking at. For instance, I
would be surprised to see the loads of the building change
by 10% based on 1 zone or 2. However, if you are looking at
consumption of energy by an HVAC system then it is possible,
especially if you are using a single thermostat to control
the system.<br>
<br>
kind regards,<br>
<br>
David<br>
<br>
<br>
<br>
On 01/24/2018 08:22, Alex moreno via TRNSYS-users wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi<br>
<br>
I have a doubt when i modeling a single family building
with two floors,<br>
how i can connect the airchange between of two zones
(first floor and<br>
second floor)<br>
<br>
another doubt is:<br>
<br>
Firstly i simulated the two floors us one zones, but now i
simulate the<br>
buildign us two zones, the results of heating differ 2%
respec of one<br>
zone building and differ cooling 10%, it is normally?<br>
<br>
regards<br>
<br>
<br>
Alex<br>
<br>
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</blockquote>
<br>
-- <br>
***************************<br>
David BRADLEY<br>
Principal<br>
Thermal Energy Systems Specialists, LLC<br>
22 North Carroll Street - suite 370<br>
Madison, WI 53703 USA<br>
<br>
P:+1.608.274.2577<br>
F:+1.608.278.1475<br>
<a href="mailto:d.bradley@tess-inc.com" target="_blank"
moz-do-not-send="true">d.bradley@tess-inc.com</a><br>
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<pre wrap="">_______________________________________________
TRNSYS-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a>
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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