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<p>Emre,</p>
<p>No it's not normal for the outlet temperature to be the inlet temperature - unless there is no heat transfer going on. Did you turn the heat pump and the pump on? Did you plot the energy flows from the heat pump to see what they show? It's hard to see your plot but if the pump temperature in pink is being plotted, and it's the same temperature as the outlet temperature in red, then the pink line would totally cover the red line - which doesn't look like it's happening....</p>
<p> </p>
<p>Jeff</p>
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<pre>---<br />Jeff Thornton
President - TESS LLC
3 N. Pinckney Street, Suite 202, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com
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<p>On 09/04/2019 1:13 pm, Emre Arpaci via TRNSYS-users wrote:</p>
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<div dir="ltr">hello trnsys users
<div>I m heating a greenhouse with water source heat pump as you see in the figure.</div>
<div>I m using a lake as the heat source ( open loop system)</div>
<div>my heat pump values are there</div>
<div> </div>
<div>Rated heating capacity : 58120 kj/hr</div>
<div>rated heating power : 15120 kj/hr </div>
<div>inlet source flowrate : 1700 kg/hr</div>
<div>inlet load flowrate : 2600 kg/hr</div>
<div> </div>
<div>and my lake montly temperatures</div>
<div>january : 4 santigrad degree</div>
<div>february :5</div>
<div>march : 6 ...etc.</div>
<div> </div>
<div>so my question is that my heat pump output source temperature and the inlet source temperature are same, is this normal ? </div>
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<div>I thınk the output source temperature should be less than inlet source temperature( 4 degrees and changing montly ). because the source energy is absorbed in heating mode.</div>
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<div>thanks </div>
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<div><img src="cid:b236a381444bfbd4bce01c84e020a268@tess-inc.com" alt="heatpmp1.jpg" width="452" height="283" />
<div><img src="cid:564250593578fff8ca1f677eb2fed038@tess-inc.com" alt="heatpmp2.jpg" width="452" height="283" /></div>
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