<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Simple question; did you connect the outputs of the heat pump ( temperature, humidity and flow rate) back to the building as ventilation inputs?<div><br></div><div>Jeff<br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Mar 27, 2020, at 10:31 AM, David BRADLEY via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p>Hüseyin,</p>
<p> I am not clear on what you mean by "it" doesn't change. I would
recommend that you send the project, weather file, and heat pump
files to your distributor so that they can have a look. If you
aren't sure who to contact, please email me.</p>
<p>David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 03/27/2020 10:27, Hüseyin Günhan
Özcan wrote:<br>
</div>
<blockquote type="cite" cite="mid:7a282d1fe953480980c4352ea4c35817@ExchMbx2.yustaff.local">
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<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">Dear David,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">Thanks for your rapid reply. As you said, I
turned off the automatic heating and cooling. I can see the
temperature of the zone is floating. I also used a second
stage thermostat (type 1503) and adjust the high and low
stage temperatures. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">However, it does not change although the
temperature floats between 19 °C and 30 C°.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">Regards.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">HG Ozcan<o:p></o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif" lang="EN-US">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif" lang="EN-US"> David BRADLEY
<a class="moz-txt-link-rfc2396E" href="mailto:d.bradley@tess-inc.com"><d.bradley@tess-inc.com></a>
<br>
<b>Sent:</b> Friday, March 27, 2020 3:12 PM<br>
<b>To:</b> Hüseyin Günhan Özcan
<a class="moz-txt-link-rfc2396E" href="mailto:huseyin.ozcan@yasar.edu.tr"><huseyin.ozcan@yasar.edu.tr></a>; TRNSYS users mailing
list at OneBuilding.org
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users@lists.onebuilding.org"><trnsys-users@lists.onebuilding.org></a><br>
<b>Cc:</b> Muhammad Zeeshan
<a class="moz-txt-link-rfc2396E" href="mailto:zeeshanmuhammad922@gmail.com"><zeeshanmuhammad922@gmail.com></a><br>
<b>Subject:</b> Re: [TRNSYS-users] Type 941(Air to water
heat pump)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Hüseyin<o:p></o:p></p>
<p> This may seem very basic but make sure that you have turned
off the automatic heating and cooling in TRNBuild so that the
temperature of your zone is floating. You can verify this by
running your simulation; the zone temperature should more or
less follow the ambient temperature. You will then implement a
thermostat to watch the zone temperature and turn on/off the
heat pump accordingly.
<o:p></o:p></p>
<p> If that is what you are doing already and the power and
capacity of the heat pump is not changing at all then it must
mean that neither the return air temperature nor the water
inlet temperature is changing at all. It could also mean that
the return air temperature and inlet water temperature are
outside the range of data values given in the data file. The
routine that reads the data file and interpolate within the
range but cannot extrapolate beyond the range given.<o:p></o:p></p>
<p>kind regards,<o:p></o:p></p>
<p> David<o:p></o:p></p>
<p><o:p> </o:p></p>
<div>
<p class="MsoNormal">On 03/27/2020 09:29, Hüseyin Günhan Özcan
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">Dear all,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">I have a similar question about modeling air
source heat pump.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">In my case I am working the model inverter
heat pump so I selected the multi stage heat pump (Type
922c).</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">Meanwhile, I connected its return temperature
value to the Type 56 indoor temperature (I am following a
single room) and I also use Type 15-6 for outdoor
conditions. Although I make some changes in the building
file (internal heat gain, regimes, etc.) and weather data
the model shows always the same values.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">Therefore, I realized that it only works
based on external catalogue values. But, it does not make
sense. Do you have an idea about this case ? How can type
922c operates based on temperature variations belongs to
the building.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">Another question is how can I change the
catalogue values ? (I have no problem in proforma
including parameter, input and output parts).</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US" lang="EN-US">Thanks in advance.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Huseyin
Gunhan Ozcan</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Visiting
Researcher</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Porto
Uni., Dept. of Mech. Eng.</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt"> </span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Yu Gothic
,sans-serif",serif"><div><image001.png></div></span></b><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif" lang="EN-US">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif" lang="EN-US"> TRNSYS-users
<a href="mailto:trnsys-users-bounces@lists.onebuilding.org" moz-do-not-send="true"><trnsys-users-bounces@lists.onebuilding.org></a>
<b>On Behalf Of </b>David BRADLEY via TRNSYS-users<br>
<b>Sent:</b> Friday, March 27, 2020 1:45 PM<br>
<b>To:</b> TRNSYS users mailing list at
OneBuilding.org <a href="mailto:trnsys-users@lists.onebuilding.org" moz-do-not-send="true">
<trnsys-users@lists.onebuilding.org></a><br>
<b>Cc:</b> David BRADLEY <a href="mailto:d.bradley@tess-inc.com" moz-do-not-send="true"><d.bradley@tess-inc.com></a>;
Muhammad Zeeshan
<a href="mailto:zeeshanmuhammad922@gmail.com" moz-do-not-send="true"><zeeshanmuhammad922@gmail.com></a><br>
<b>Subject:</b> Re: [TRNSYS-users] Type 941(Air to
water heat pump)</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p>Muhammad,<o:p></o:p></p>
<p> Please refer to the Type941 documentation. It explains
how the external files and the parameters relate to each
other to compute the overall capacity and power consumption
of the heat pump.
<o:p></o:p></p>
<p> The evaporator does not really need to be designed more
than to choose a machine with an appropriate rated capacity.
Traditionally that might mean adding a safety factor to the
peak cooling load (10% is often used) and then selecting a
machine that will meet that capacity. Also bear in mind that
Type941 models a single speed (ie single capacity) heat pump
that is either on or off. Depending on how variable the load
in your building it, you might want to meet that load with
multiple smaller heat pumps rather than one big one.<o:p></o:p></p>
<p>kind regards,<o:p></o:p></p>
<p> David<o:p></o:p></p>
<p> <o:p></o:p></p>
<div>
<p class="MsoNormal">On 03/27/2020 08:02, Muhammad Zeeshan
via TRNSYS-users wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Hello Everyone, <o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> I am
working on cooling a building with type 41(air to
water source heat pump). The cooling load of the
building is 25 tons. I want to know<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">1)- how the compressor power will
be calculated? as the external files of type 941
contains fractions of compressor power which shows no
link to the equations provided in manual. How to link
the external file with the provided equations?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">2)-As the cooling load of the
building is 25 tons, how to design the evaporator for
this building load?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Your help in this regard will be
highly appreciated.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Regards,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Muhammad Zeeshan<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>TRNSYS-users mailing list<o:p></o:p></pre>
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<pre>-- <o:p></o:p></pre>
<pre>***************************<o:p></o:p></pre>
<pre>David BRADLEY<o:p></o:p></pre>
<pre>Principal<o:p></o:p></pre>
<pre>Thermal Energy Systems Specialists, LLC<o:p></o:p></pre>
<pre>3 North Pinckney Street - suite 202<o:p></o:p></pre>
<pre>Madison, WI 53703 USA<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>P:+1.608.274.2577<o:p></o:p></pre>
<pre>F:+1.608.278.1475<o:p></o:p></pre>
<pre><a href="mailto:d.bradley@tess-inc.com" moz-do-not-send="true">d.bradley@tess-inc.com</a><o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre><a href="http://www.tess-inc.com" moz-do-not-send="true">http://www.tess-inc.com</a><o:p></o:p></pre>
<pre><a href="http://www.trnsys.com" moz-do-not-send="true">http://www.trnsys.com</a><o:p></o:p></pre>
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<pre><span style="color:black">Bu elektronik postada bulunan tum fikir ve gorusler ve ekindeki dosyalar sadece adres sahip/sahiplerine ait olup,<o:p></o:p></span></pre>
<pre><span style="color:black">Yasar Universitesi bu mesajin icerigi ile ilgili olarak hic bir hukuksal sorumlulugu kabul etmez. Eger gonderilmesi<o:p></o:p></span></pre>
<pre><span style="color:black">dusunulen kisi veya kurulus degilseniz, lutfen gonderen kisiyi derhal haberdar ediniz ve mesaji sisteminizden siliniz.<o:p></o:p></span></pre>
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<pre><span style="color:black">The information contained in this e-mail and any files transmitted with it are intended solely for the use of the<o:p></o:p></span></pre>
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<pre>-- <o:p></o:p></pre>
<pre>***************************<o:p></o:p></pre>
<pre>David BRADLEY<o:p></o:p></pre>
<pre>Principal<o:p></o:p></pre>
<pre>Thermal Energy Systems Specialists, LLC<o:p></o:p></pre>
<pre>3 North Pinckney Street - suite 202<o:p></o:p></pre>
<pre>Madison, WI 53703 USA<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>P:+1.608.274.2577<o:p></o:p></pre>
<pre>F:+1.608.278.1475<o:p></o:p></pre>
<pre><a href="mailto:d.bradley@tess-inc.com" moz-do-not-send="true">d.bradley@tess-inc.com</a><o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><a href="http://www.tess-inc.com" moz-do-not-send="true">http://www.tess-inc.com</a><o:p></o:p></pre>
<pre><a href="http://www.trnsys.com" moz-do-not-send="true">http://www.trnsys.com</a><o:p></o:p></pre>
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<pre>Bu elektronik postada bulunan tum fikir ve gorusler ve ekindeki dosyalar sadece adres sahip/sahiplerine ait olup,
Yasar Universitesi bu mesajin icerigi ile ilgili olarak hic bir hukuksal sorumlulugu kabul etmez. Eger gonderilmesi
dusunulen kisi veya kurulus degilseniz, lutfen gonderen kisiyi derhal haberdar ediniz ve mesaji sisteminizden siliniz.
The information contained in this e-mail and any files transmitted with it are intended solely for the use of the
individual or entity to whom they are addressed Yasar University does not accept legal responsibility for the
contents. If you are not the intended recipient, please immediately notify the sender and delete the message from your system.</pre>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
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>
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