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<p class=MsoNormal>I’m attempting to model the difference between using
PTHP’s vs. PTAC’s in a hotel in Seattle, WA. The only difference
between the two models is heat-source = ELECTRIC for the PTAC model and
heat-source = HEAT-PUMP for the PTHP model, as well as a COP of 3.2 for the
PTHP’s. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>After running the models, I find that the PTHP’s use
more heating energy than the PTAC’s. This doesn’t seem to make
sense. Even in the worst case scenario in which the PTHP’s use their supplemental
heat 100% of the time it seems the savings should at worst be 0%. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Anyone have any thoughts as to what I’m doing wrong?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-family:"Franklin Gothic Demi","sans-serif"'>Robby
Oylear, LEED</span><span style='font-size:8.0pt;font-family:"Franklin Gothic Demi","sans-serif";
position:relative;top:-2.0pt;mso-text-raise:2.0pt'>®</span><span
style='font-family:"Franklin Gothic Demi","sans-serif"'> AP<o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt'>Mechanical Engineer</span></i><i><span
style='font-size:10.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></i></p>
<p class=MsoNormal><span style='font-size:10.0pt'>direct: 206.788.4571<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'>cell: 206.354.2721</span><span
style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:3.0pt'><u><span style='font-size:7.5pt;
color:blue'>www.</span></u><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><a
href="http://www.rushingco.com" title="blocked::http://www.rushingco.com/"><span
style='font-size:7.5pt;color:blue'>rushingco</span><span style='font-size:7.5pt;
font-family:"Calibri","sans-serif";color:blue'>.com</span></a><o:p></o:p></span></p>
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