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Anas,<br>
There is no flow of liquid going through your heater. The inlet
flow rate is set to a constant value of 0.<br>
<br>
I am unclear on why you are sending a heating rate to the Type940
heater model. Type940 is intended to compute how much energy is
needed in order to raise the temperature of a liquid flow from its
inlet temperature to a setpoint temperature. If you already know how
much energy your heater needs then there is no reason to use a
heater model. You could compare your known energy quantity with the
results of Type940 or you could use a simple equation to compute the
temperature of the water leaving a heater based on your known energy
quantities.<br>
regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 4/22/2015 12:58 AM, Anas Majdouli
wrote:<br>
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<hr id="stopSpelling">From: <a class="moz-txt-link-abbreviated" href="mailto:majdouli_anas@hotmail.fr">majdouli_anas@hotmail.fr</a><br>
To: <a class="moz-txt-link-abbreviated" href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a><br>
Subject: TRNsys basic simulation of a an instantaneous gaz
heater<br>
Date: Wed, 22 Apr 2015 07:57:06 +0200<br>
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<p class="ecxMsoNormal">Hi TRNsys community !</p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal">I am working on a simulation using
Type940 [Gas Tankless
Water Heater] and based on a daytime strategy using Type
14c [Time Dependent
Forcing Function: Internal Gains]. </p>
<p class="ecxMsoNormal">The values of Type 14c points are
heat rates [kJ/hr] because
I calculated for each hour the energy rate required for
heating. But the energy
output of the heater (Type940) doesn’t correspond match
with my forcing
function : it remains constant <span
style="font-family:Wingdings;">L</span>.</p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal">Please find attached to this email
my simulation files. I am
using TRNsys 17. </p>
<p class="ecxMsoNormal">Thanks in advance for your help.</p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal">Yours Sincerely,</p>
<p class="ecxMsoNormal">Anas MAJDOULI</p>
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<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>
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