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Mayank,<br>
Without seeing your simulation, it is hard to know what is going
wrong. A few thoughts, though (and I am assuming that you are using
Type56 to model the building).<br>
<br>
1. Make sure that you have adjusted the capacitance of your zones.
The default capacitance only accounts for the capacitance of the air
in the zone. Adjust the value to be about 5 times higher than the
default in each of your zones in TRNBuild.<br>
<br>
2. Make sure that you are conditioning the building using
temperature level control NOT the automatic cooling type that is
built into Type56. This will involve adding a VENTILATION stream to
your building and a thermostat model in addition to Type921 and the
blower.<br>
<br>
3. Make sure that you are using a 1 or a 5 minute time step. TRNSYS
can only make one control decision each time step. If the time step
is too long, the zone will get over-cooled long before the end of
the time step and the controller will try to turn off the air
conditioner, which will result in the zone getting too hot.<br>
<br>
Regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 12/9/2012 12:34, Mayank Bhatnagar
wrote:<br>
</div>
<blockquote
cite="mid:CAJdG7BDcePgUKNm0t+3ySMNegeq62oBO+i0+QJY58reuZdFhpg@mail.gmail.com"
type="cite">Hello All,<br>
<br>
I am modeling vapor compression air conditioning system for a
house. I am using type 921 with a blower to meet the cooling load
of zones of the building. In this I got an error of maximum
warning limit exceeds. The warnings are : <br>
TRNSYS Message 441 : The inputs to the listed units have not
converged at this timestep. The values at the last iteration will
be used and the simulation will proceed.<br>
Reported information : UNITS: 9 39 64 70<br>
<br>
I am not sure, what I am doing wrong.Please help me out.<br>
<br>
If some one has example file of this, please share it.<br>
<br>
Thank you.<br>
<br>
Regards,<br>
<br>
Mayank Bhatnagar,<br>
<br>
<br>
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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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