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<p>Pouyan,</p>
<p> Variable speed heat pump models (air-to-air, air-to-water,
water-to-air, and water-to-water) will be available in an upcoming
update to the TESS libraries. Because we have not yet set a firm
release date, models are available individually at the moment.
Please contact <a class="moz-txt-link-abbreviated" href="mailto:techsupport@tess-inc.com">techsupport@tess-inc.com</a> for details if you are
interested.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 08/09/2021 08:41, Pouyan
Talebizadehsardari (Staff) via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:LO0P265MB4895812FF913E2722F5C55B1CDF69@LO0P265MB4895.GBRP265.PROD.OUTLOOK.COM">
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<div class="WordSection1">
<p class="MsoNormal">Dear <span
style="font-family:"Century Schoolbook",serif"
lang="TR">
Huseyin,<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for your answer. However, in your
paper, you used an air-to-air heat pump; however, as I have a
radiator in my system, I need to use an air-to-water heat pump
which there is only a single stage type in the TRNSYS TESS
library.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kind regards<o:p></o:p></p>
<p class="MsoNormal">Pouyan<o:p></o:p></p>
<p class="MsoNormal"><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="mso-fareast-language:EN-GB" lang="EN-US">From:</span></b><span
style="mso-fareast-language:EN-GB" lang="EN-US"> Hüseyin
Günhan Özcan <a class="moz-txt-link-rfc2396E" href="mailto:huseyin.ozcan@yasar.edu.tr"><huseyin.ozcan@yasar.edu.tr></a>
<br>
<b>Sent:</b> 09 August 2021 14:27<br>
<b>To:</b> Pouyan Talebizadehsardari (Staff)
<a class="moz-txt-link-rfc2396E" href="mailto:Pouyan.Talebizadehsardari@brunel.ac.uk"><Pouyan.Talebizadehsardari@brunel.ac.uk></a><br>
<b>Cc:</b> 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>Subject:</b> RE: air-to-water heat pump - Type 941<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR">Dear Sardari,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR">You can use two-stage heat
pump models to create low, nominal and high stages for the
considered heat pump.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR">We had a publication for a
two stage air source heat pump. Pls. see the shared link
below.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR"><a
href="https://www.sciencedirect.com/science/article/pii/S2210670721000482"
moz-do-not-send="true">https://www.sciencedirect.com/science/article/pii/S2210670721000482</a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR">Dr. Huseyin Gunhan OZCAN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century
Schoolbook",serif" lang="TR"><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="mso-fareast-language:TR" lang="TR">From:</span></b><span
style="mso-fareast-language:TR" lang="TR"> 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>Pouyan Talebizadehsardari (Staff)
via TRNSYS-users<br>
<b>Sent:</b> Monday, August 9, 2021 12:54 PM<br>
<b>To:</b> <a
href="mailto:TRNSYS-users@lists.onebuilding.org"
moz-do-not-send="true">TRNSYS-users@lists.onebuilding.org</a><br>
<b>Cc:</b> Pouyan Talebizadehsardari (Staff) <<a
href="mailto:Pouyan.Talebizadehsardari@brunel.ac.uk"
moz-do-not-send="true">Pouyan.Talebizadehsardari@brunel.ac.uk</a>><br>
<b>Subject:</b> [TRNSYS-users] air-to-water heat pump -
Type 941<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="TR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">Dear All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">I am
modelling a house heated by radiators using an air-to-water
heat pump. This model is based on user-supplied data files
containing catalogue data for the capacity and power based
on the inlet water temperature and air to the heat pump. As
I understand, for a specific existed heat pump, the system
should be tested for several inlet conditions (for example 5
different temperatures of water and air=25 case) and then
create a new data file including the capacity and power. Am
I correct?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">My main
question is that is it possible to consider additional
characteristics of the heat pump in the model such as
variable speed compressor so the system can be worked with a
lower power when less heat is required for the radiators?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">Thanks in
advance<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt">Best regards<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="background:white"><b><span
style="color:#201F1E;border:none windowtext
1.0pt;padding:0cm;mso-fareast-language:EN-GB">*******************************************************************************</span></b><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#222222;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#201F1E;border:none windowtext
1.0pt;padding:0cm;mso-fareast-language:EN-GB">Pouyan
Talebizadeh Sardari</span></b><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#201F1E;border:none windowtext
1.0pt;padding:0cm;mso-fareast-language:EN-GB">, BSc MSc PhD
AFHEA</span><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#222222;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#201F1E;border:none windowtext
1.0pt;padding:0cm;mso-fareast-language:EN-GB">Centre for
Sustainable Energy Use in Food Chains,
<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#201F1E;border:none windowtext
1.0pt;padding:0cm;mso-fareast-language:EN-GB">Institute of
Energy Futures,
<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#201F1E;border:none windowtext
1.0pt;padding:0cm;mso-fareast-language:EN-GB">Brunel
University London,
<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#201F1E;border:none windowtext
1.0pt;padding:0cm;mso-fareast-language:EN-GB">Kingston Lane,
Uxbridge, Middlesex, UB8 3PH, UK
</span><span style="font-size:12.0pt;font-family:"Times
New
Roman",serif;color:#222222;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#201F1E;border:none windowtext
1.0pt;padding:0cm;mso-fareast-language:EN-GB">Email: </span><span
style="color:black;mso-fareast-language:EN-GB"><a
href="mailto:pouyan.talebizadehsardari@brunel.ac.uk"
moz-do-not-send="true"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:blue;border:none windowtext
1.0pt;padding:0cm">pouyan.talebizadehsardari@brunel.ac.uk</span></a></span><span
style="font-size:12.0pt;font-family:"Times New
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<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>
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</blockquote>
<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
<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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