<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Dear Younness,<br>
I would not worry about switching to the detailed humidity model
in Type56; the simple one is quite adequate. Make sure that the
humidity multiplier is set to a value between about 5 and 15. This
indicates that the zone has between 5 and 15 times the moisture
capacitance of the air in the zone. If you only consider the
moisture capacitance of the air (by setting the multiplier to 1)
then you are discounting the fact that the furnishings and the wall
materials in the zone can absorb (and desorb) moisture. <br>
<br>
I think also that you are modeling the variation in RH correctly,
its just that based on your system, there isn't a very good way to
dry out the space. Look carefully at the RH of the ventilation air
that you are putting into the space. If its RH is high and if there
are any latent gains in your space (from occupants or from cooking,
for example) then the moist air in the residence has no way of
drying out. Try changing the conditions of the air that you are
putting into the space by means of a VENTILATION type; set the RH
(arbitrarily) to 30% and make sure that the RH in the zone drops to
something close to that level.<br>
Kind regards,<br>
David<br>
<br>
<br>
On 12/29/2011 10:38, youness EL FOUIH wrote:
<blockquote
cite="mid:CAA8z4JcMjg3qc_u2U_siUjLqdLjxQkr-DWxK-uEkr-g4qg-1KQ@mail.gmail.com"
type="cite">Dear TRNSYS users,<br>
I'm trying to simulate a humidity controlled ventilation system
for a flat. As you know in this system the air flow rate is given
as function of the relative humidity. the problem that I'm facing
now is that the relative humidity within the kitchen (which has no
external walls, only adjacent) does not vary it's almost fix
around 98%. <br>
I cheked the humidity parameter for the considered zone and I
changed the model from "Simple Humidity Model" to "Moisture
capacitance Moisture" but i really don't know how we could use
this model and does every parameter mean.<br>
<br clear="all">
I would be pleased if anyone who know how can I model the
variation of the internal relative humidity show me how to do it.<br>
<br>
Thanks for your help in advance.<br>
<br>
-- <br>
<div dir="ltr"><font color="#999999"><span
style="color:rgb(51,51,51)"><b>EL Fouih Younness<br>
</b><font color="#666666">Ingénieur Process - ENIM </font></span></font><span
style="color:rgb(51,51,51)"><font color="#666666">- Rabat</font></span><span
style="color:rgb(51,51,51)"><font color="#666666"> - Promo
2010 <br>
Master Stratégies Énergétiques - Mines Paristech - Paris<br>
</font></span><font color="#666666">Tel : <a
moz-do-not-send="true"
href="tel:%2B33%206%2048%2081%2001%2013"
value="+33648810113" target="_blank">+33 6 48 81 01 13</a><br>
</font></div>
<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>