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    Alessandro,<br>
      It depends on what heat pump model you are using. If you are using
    one of the TESS heat pump models then it does not take the COP
    directly. Instead it takes the heat pump capacity (energy delivered,
    assuming the heat pump does not have a variable speed compressor)
    and the heat pump power draw at various inlet conditions. The COP is
    computed from these two values so knowing two, you can compute the
    third and enter it in the external data files required by the heat
    pump model.<br>
    Regards,<br>
     David<br>
    <br>
    <br>
    On 6/24/2012 03:00, Alessandro Rinaldi wrote:
    <blockquote cite="mid:DUB109-W44D8CDD33BAA625D56CDB8C3E20@phx.gbl"
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         <span id="result_box" lang="en"><span class="hps">Hi,</span> <span
            class="hps">I am doing</span> <span class="hps">a</span> <span
            class="hps">simulation</span> <span class="hps">with an</span>
          <span class="hps">air to air</span> <span class="hps">heat
            pump</span><span>.</span> <span class="hps">How</span> <span
            class="hps">I can</span> <span class="hps">insert the</span>
          <span class="hps">pump efficiency</span> <span class="hps
            atn">(</span><span>COP</span><span>)</span><span>,</span> <span
            class="hps">because</span> <span class="hps">of the
            technical</span> <span class="hps">data</span> <span
            class="hps">regarding</span> <span class="hps">the pump</span>
          <span class="hps">power consumption</span> <span class="hps">and
            their</span> <span class="hps">heat loads</span><span>.</span>
          <span class="hps">thanks</span></span> </div>
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    <br>
    <pre class="moz-signature" cols="72">-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
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<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
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