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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>Hello e-quest users,</FONT></P>
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>I am working in detailed mode and need to change from PTAC to WSHP (a cooling tower provides cold water and condensing boiler provides hot water to WSHP). I calculated EIR from EER and COP using the equation that was recommended for packaged VAV on this forum.<SPAN style="mso-spacerun: yes"> </SPAN>Is there a more accurate way of calculating EIR for heat pumps? I also noticed that my energy cost increases when I use higher COP (electricity consumption decreases but natural gas consumptions goes up significantly, more that I would expect). <SPAN style="mso-spacerun: yes"> </SPAN>SV-A report shows that e-quest auto selects heat pumps of larger capacity if I enter larger COP. I also have significant increase in the energy cost if I manually increase the heating size of WSHP while keeping EER and COP unchanged. Since my HP cycle I would not expect significant increse in cost with larger HP at the same heating load. Am I wrong?</FONT></P>
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>I would greatly appreciate if anyone would share his/her experience with modeling WSHP. Why would cost increase with higher COP and do you have e-quest auto size WSHP?</FONT></P>
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>Thanks</FONT></P>
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>Ana Nedeljkovic</FONT></P>
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>HVAC Engineer</FONT></P> <br /><hr />Bing brings you maps, menus, and reviews organized in one place. <a href='http://www.bing.com/search?q=restaurants&form=MFESRP&publ=WLHMTAG&crea=TEXT_MFESRP_Local_MapsMenu_Resturants_1x1' target='_new'>Try it now.</a></body>
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