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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=DE>Hi Muhammad, <o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>That was actually part of my PhD research project.</p><p class=MsoNormal>In Trnsys you have the possibility to apply single and 2-stage heat pumps models (Type 927, 1221) but as far as I know no type for variable speed heat pump is yet implemented. </p><p class=MsoNormal>I would recommend you to use a datasheet of operation points of variable speed heat pump from any manufacturer and use Type Multi-Dimensional Data Interpolation (Type 581) to generate an interactive interpolation depending on the parameters you want to study such as (Compressor Frequency, outlet water temperature and etc).</p><p class=MsoNormal>You can then connect your heating/cooling load model to your heat pump model. </p><p class=MsoNormal>However to have a start point you could start with Type 1221 and implement a simple load control strategy for it to seen how it performs.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Bests, </p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hamidreza Heidar Esfehani<br>Wissenschaftlicher Mitarbeiter|Research Associate<br><br>Leibniz Universität Hannover <br>IEK Abt.Gebäudetechnik<br>Herrenhäuser Str. 8<br>30419 Hannover<br><br>Telefon : +49 (0)511 762 3811<br>Fax : +49 (0)511 762 3016<br>hamidreza.esfehani@iek.uni-hannover.de<br><br>www.iek.uni-hannover.de/gebaeudetechnik</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:trnsys-users@lists.onebuilding.org">Muhammad Abid via TRNSYS-users</a><br><b>Sent: </b>Sunday, January 27, 2019 4:10 PM<br><b>To: </b><a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a><br><b>Cc: </b><a href="mailto:Abid-M@ulster.ac.uk">Muhammad Abid</a><br><b>Subject: </b>[TRNSYS-users] Variable speed heat pump compressor heat pump inTRNSYS</p></div><p class=MsoNormal><o:p> </o:p></p><p><span style='font-size:12.0pt;color:black'>Hi Dear TRNSYS user,<o:p></o:p></span></p><p><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></p><p><span style='font-size:12.0pt;color:black'>I will be using TRNSYS for my research work on variable speed heat pump compressor for demand side management and network stability. <o:p></o:p></span></p><p><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></p><p><span style='font-size:12.0pt;color:black'>I have started learning TRANSYS since last two months and have got some basic ideas.I wish to start in systematic way. Once I look into the different heat pump mathematical models, get confused i.e Geometrical or Physical model, semi empirical model(including the lumped model), empirical model. I am not sure which model should i select at this early stage which should be useful to achieve the objectives associated with the topic at later stage.<o:p></o:p></span></p><p><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></p><p><span style='font-size:12.0pt;color:black'>I need some suggestions and a simple start point which can lead me to go through my PhD studies? Furthermore as a part of my work i need to do some experiments with the test bed. So what parameters should i expect from the test bed?<o:p></o:p></span></p><p><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></p><p><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></p><p><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></p><p><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></p><p><span style='font-size:12.0pt;color:black'>Best Regards<o:p></o:p></span></p><div id=Signature><div id=divtagdefaultwrapper><p class=MsoNormal><span style='font-size:12.0pt;color:black'><img border=0 width=150 height=114 style='width:1.5666in;height:1.1833in' id="_x0000_i1025" src="http://cdn.ulster.ac.uk/signature-logos/doctoral_email_150_outlook.jpg" alt="Ulster University"></span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Muhammad Abid</span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>PhD Researcher</span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Centre for Sustainable Technologies, Room 26B23</span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Belfast School of Architecture and the Built Environment</span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Faculty of Computing, Engineering and the Built Environment </span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Ulster University, Jordanstown Campus, United Kingdom</span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>T: +44-(0)-2890366413</span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>E: abid-m@ulster.ac.uk </span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>W:</span><u><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:blue'><a href="" target="_blank"><span style='font-size:9.0pt'> www.ulster.ac.uk</span></a></span></u><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black;background:white'>W</span><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D;background:white'>: </span><span class=MsoHyperlink><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black;background:white'><a href="http://www.cst.ulster.ac.uk/"><span style='font-size:9.0pt'>www.cst.ulster.ac.uk</span></a></span></span><span style='font-size:12.0pt;color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;background:white'><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></p></div></div><p class=MsoNormal><span style='font-size:7.5pt'><br><br>This email and any attachments are confidential and intended solely for the use of the addressee and may contain information which is covered by legal, professional or other privilege. 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