<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Dear Mehdi,<br>
There are a couple of issues going on here. First, Type91 is a
sensible heat exchanger that is intended to be used with liquid on
both sides. You can use it for a water to air heat exchanger but you
need to use a Type33 on the outlet side to compute the humidity of
air leaving the heat exchanger. Keep in mind that the heat exchanger
will only transfer sensible heat so you have to assume that the
absolute humidity ratio of the air going in to Type91 is the same as
the absolute humidity ratio of the air leaving Type91 (only the
temperature and the relative humidity change). <br>
<br>
Second, it sounds as though you need a version of Type683 that
will calculate the outlet humidity ratio based on a known
regeneration air temperature. There are two options here. If you are
able to update to Trnsys17 and the TESS HVAC Library for Trnsys17,
then Type683 is now available in two modes, one that calculates the
required regeneration air temperature to achieve a desired humidity
setpoint and one that calculates the outlet humidity given a known
regeneration air inlet temperature. If you need to stick with your
current Trnsys version then you can put an auxiliary air heater on
the outlet of your Type91 and further heat up the air if it is not
sufficiently hot to achieve the dehumidification that you want.<br>
Kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/21/2012 11:17, Mehdi Salehi
wrote:<br>
</div>
<blockquote
cite="mid:1350836278.57685.YahooMailNeo@web125104.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:times
new roman, new york, times, serif;font-size:12pt">
<div><br>
</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 12pt; ">
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 12pt; ">
<div id="yiv560837223">
<div>
<div style="color: rgb(0, 0, 0); background-color:
rgb(255, 255, 255); font-family: 'times new roman',
'new york', times, serif; font-size: 12pt; ">
<div style="font-family: 'times new roman', 'new
york', times, serif; font-size: 12pt; ">
<div style="font-family: 'times new roman', 'new
york', times, serif; font-size: 12pt; ">
<div dir="ltr"> </div>
<div id="yiv560837223">
<div>
<div style="color: rgb(0, 0, 0);
background-color: rgb(255, 255, 255);
font-family: 'times new roman', 'new york',
times, serif; font-size: 12pt; ">
<div><span style="font-size:12pt;">Dear Dr.
Sir/madam</span><br>
</div>
<div style="font-family: 'times new roman',
'new york', times, serif; font-size: 12pt;
">
<div style="font-family: 'times new
roman', 'new york', times, serif;
font-size: 12pt; ">
<div id="yiv560837223">
<div>
<div style="color: rgb(0, 0, 0);
background-color: rgb(255, 255,
255); font-family: 'times new
roman', 'new york', times, serif;
font-size: 12pt; ">
<div style="font-family: 'times
new roman', 'new york', times,
serif; font-size: 12pt; ">
<div style="font-family: 'times
new roman', 'new york', times,
serif; font-size: 12pt; ">
<div id="yiv560837223">
<div style="color: rgb(0, 0,
0); background-color:
rgb(255, 255, 255);
font-family: 'times new
roman', 'new york', times,
serif; font-size: 12pt; ">
<div><font face="times new
roman, new york,
times, serif" size="3">I
am phd student in
Solar Energy Research </font><font
face="times new roman,
new york, times,
serif">Institute (
SERI) National
University of
Malaysia.</font><font
face="times new roman,
new york, times,
serif" size="3"> </font></div>
<div
style="background-color:transparent;"><font
face="times new roman,
new york, times,
serif" size="3">I
would like to inform
you that my project is
solar two
stage desiccant cooling.
I working on
simulation by Trnsys,
but I have problem for
type 683 rotary
desiccant
dehumidifier. I don't
know How I can arrange
set point humidity
ratio of
exit process air to
find temperature of
regeneration air
required. </font></div>
<div
style="background-color:transparent;"><font
face="times new roman,
new york, times,
serif">I used </font><span
style="font-family:
'times new roman',
'new york', times,
serif; ">heat </span><span
style="font-family:
'times new roman',
'new york', times,
serif; ">ex-changer</span><span
style="font-family:
'times new roman',
'new york', times,
serif; "> (type 91)</span><span
style="background-color:transparent;"><font face="times new roman, new
york, times, serif"> to
transfer heat from
solar system while
the outputs of type
91 are just flow
rate and Temperature
and there is no
humidity ratio
to connecting to
input ( humidity
ratio) of type 683.
but I
can connecting humidity
ratio of output
fresh air of </font></span><span><font
face="times new
roman, new york,
times, serif">heat
recovery heat ( type
760 b) to input
humidity ratio
of regeneration type
683 .</font></span><span
style="background-color:transparent;"><font face="times new roman, new
york, times, serif"> I
can send to you my
simulation by
attachment file,If
you need.</font></span></div>
<div
style="background-color:
transparent; color:
rgb(0, 0, 0); font-size:
16px; font-family:
'times new roman', 'new
york', times, serif;
font-style: normal; "><span
style="background-color:
transparent;
font-family: 'times
new roman', 'new
york', times, serif; "> Kindly
please advice to me
for simulation by type
683.</span></div>
<div
style="background-color:
transparent; color:
rgb(0, 0, 0); font-size:
16px; font-family:
'times new roman', 'new
york', times, serif;
font-style: normal; "
class="yiv560837223yui_3_7_2_20_1350828273051_71"><span
style="background-color:
transparent;
font-family: 'times
new roman', 'new
york', times, serif; "
class="yiv560837223yui_3_7_2_20_1350828273051_96"><br>
</span></div>
<div
style="background-color:transparent;"><font
face="times new roman,
new york, times,
serif">Your cooperation is
highly appreciated.</font></div>
<div
style="background-color:
transparent; color:
rgb(0, 0, 0); font-size:
16px; font-family:
'times new roman', 'new
york', times, serif;
font-style: normal; "><font
face="times new roman,
new york, times,
serif">Best Regards,</font></div>
<div
style="background-color:
transparent; color:
rgb(0, 0, 0); font-size:
16px; font-family:
'times new roman', 'new
york', times, serif;
font-style: normal; "><font
face="times new roman,
new york, times,
serif"><br>
</font></div>
<div
style="background-color:
transparent; color:
rgb(0, 0, 0); font-size:
16px; font-family:
'times new roman', 'new
york', times, serif;
font-style: normal; "><font
face="times new roman,
new york, times,
serif">Mehdi Salehi</font></div>
<div
style="background-color:
transparent; color:
rgb(0, 0, 0); font-size:
16px; font-family:
'times new roman', 'new
york', times, serif;
font-style: normal; "><br>
</div>
</div>
</div>
<br>
<br>
</div>
</div>
</div>
</div>
</div>
<br>
<br>
</div>
</div>
</div>
</div>
</div>
<br>
<br>
</div>
</div>
</div>
</div>
</div>
<meta http-equiv="x-dns-prefetch-control" content="on">
<br>
<br>
</div>
</div>
</div>
<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>