<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Michael,<br>
I have run into this problem as well, particularly in Trnsys16 and
I was not ever able to resolve it. In the end, I had to increase my
flowrate through the floor enough (or segment the floor enough) so
that the flow rate I was giving got above that threshold. My
suspicion is that Type56 calculates the required minimum flow at one
temperature and then corrects the actual flowrate for some
temperature dependent property during the simulation. If your
example is simple enough and you are willing, please send it our way
so that we can try and track down the cause!<br>
Best,<br>
david<br>
<br>
<br>
On 6/18/2012 16:24, Michael Döbele wrote:
<blockquote cite="mid:4FDF9C91.6090400@hochschule-bc.de" type="cite">Dear
TRNSSYS User,
<br>
<br>
i am trying to run an active layer with an specific massflow rate
of 15 kg/h m² (absolute value 654.15 kg/h). TRNBuild calculates a
minimum allowed massflow rate of 10.25 kg/h. (446 kg/h) ....so far
so good.
<br>
But when I set this massflow rate in TRNSYS Studio via Input to
the wanted 654.15 kg/h I get following error
<br>
<br>
"specific fluid mass flow of active layer in surface 2 below
minimum
<br>
value of16.26/m2h, increase the minimum mass flow rate or use
<br>
autosegmentation feature of TRNBuild for subdividing the surface."
<br>
<br>
This is a really strange behavior. The massflow criteria varies
and seems to depend on the inlet temperature.. I also tried
autosegmentation - I didn´t help, I got the same error message.
<br>
Please help me out here..
<br>
<br>
Thank you
<br>
<br>
Michael Döbele
<br>
<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
TRNSYS-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:TRNSYS-users@cae.wisc.edu">TRNSYS-users@cae.wisc.edu</a>
<a class="moz-txt-link-freetext" href="https://mailman.cae.wisc.edu/listinfo/trnsys-users">https://mailman.cae.wisc.edu/listinfo/trnsys-users</a>
</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>
</body>
</html>