<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Victor,<div><br></div><div>The best thing you can do to start is to isolate the heat pump in a separate project and drive it with various inlet temperature and flow rates to make sure the performance of the machine matches the map. When you’re sure it’s working correctly that’ll help you track down what’s happening with the rest of your project.</div><div><br></div><div>Jeff<br><br><div id="AppleMailSignature">Sent from my iPhone</div><div><br>On Aug 1, 2019, at 10:24 AM, Vitor Leite via TRNSYS-users <<a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>> wrote:<br><br></div><blockquote type="cite"><div>
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Hello everyone,</div>
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I got the results from a simulation and I think I am getting inconsistent results when comparing the heat pump COP and comparing it normalized performance data sample included with the component, which is the one I am currently using (type 927).</div>
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<span style="color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">The system is basically two identical heat pumps (50RT) being controlled by a multi-stage differential controller. (which is also controlling the flow rate for
both source side and load side pumps). So for the load side (connected to a vertical heat exchanger) there is only really small changes in temperature and the flow-rate goes from 0 to 0.5 to 1 following the number of H.Ps on. </span></div>
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<span style="color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">Load side flow-rate also goes from 0 to 0.5 to 1 but there are bigger temperature changes according to the demand.</span></div>
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<span style="color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">But, according to the performance data, during heating mode, the load side flow-rate should no change normalized capacity and if the load side temperature increases,
normalized capacity should decrease. Which was not what happened with my results.</span></div>
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<div style=""><font color="#000000" face="Calibri, Helvetica, sans-serif"><span style="font-size: 12pt;">Can someone with a better understanding about H.Ps take a quick look and see if this graph is
</span>reasonable compared to the performance curve<span style="font-size: 12pt;">?</span></font></div>
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<div style=""><font color="#000000" face="Calibri, Helvetica, sans-serif"><span style="font-size: 12pt;">Thanks in advance</span></font></div>
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