<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>The performance of the heat pump comes from the data that is
stored in the data file that Type927 references. Type927 reads the
data points in the file and interpolates between them to find the
performance for the present inlet conditions. Be aware, though,
that the Type cannot exptrapolate beyond the data range given in
the file. If you are asking for performance at inlet conditions
not covered in the data file you will get erroneous results. At
the end of a simulation the *.lst file contains a note about how
often the performance data files were accessed above or below
their range so that you can get an idea whether this is a problem
in your case.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 1/10/2023 1:37 PM, Amirreza Heidari
via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAMtrc5TpR+ki14nKa77uLJUbAziVmEpvZ4PFsuc3Zu06vhrFgw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div><font style="" size="4" face="times new
roman, serif" color="#000000">H<span
class="gmail_default" style="">ello,</span></font></div>
<div><font style="" size="4" face="times new
roman, serif" color="#000000"><span
class="gmail_default" style="">I am
using type 927 to model a water to water
heat pump. But I wonder why</span></font><span
style="color:rgb(0,0,0);font-family:"times new
roman",serif;font-size:large"> the
variations of heat pump power use with the
flow rate and the load temperature is <span
class="gmail_default"
style="font-family:georgia,serif;color:rgb(11,83,148)">too
small</span>. For example, a load with a
double flowrate and 2 C higher temperature
</span>only<span
style="color:rgb(0,0,0);font-family:"times
new roman",serif;font-size:large"> increases
the power usage by 0.1 kW. Any ideas about
what can be wrong? The flowrate and
temperature </span>of source<span
style="color:rgb(0,0,0);font-family:"times
new roman",serif;font-size:large">
side is fixed.</span></div>
<div><font style="" size="4" face="times new
roman, serif" color="#000000"><span
class="gmail_default" style=""><br>
</span></font></div>
<div><img
src="cid:part1.XBPbm6ZF.lplu7v0o@tess-inc.com"
alt="image.png" class="" width="517"
height="311"><br>
</div>
<div><img
src="cid:part2.XjEBDkSO.nadB4vhg@tess-inc.com"
alt="image.png" class="" width="517"
height="306"><br>
<br>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
TRNSYS-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a>
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
<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>