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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Hello All,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>I’m a novice eQuest user in the process of trying to learn some of the ins and outs of the program. Your questions and answers have already helped me immensely over the last couple of weeks, but I wasn’t able to find an answer to my latest question in the archives, so here goes nothing:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>I’m attempting to find overall percent energy savings associated with using more efficient water-source heat pumps. Keeping all other aspects of my model unchanged, I raised the heat pumps’ cooling and heating EIRs to represent a drop in both EER and COP_h (to observe the increase in electricity use associated with that one action). Total energy increase was less than I expected because the boiler attached to the water loop ended up using less natural gas to heat the loop; I remember reading that this is because eQuest uses the ratio of COPs to calculate WSHP compressor capacity, meaning that I’m actually increasing WSHP heating capacity by lowering the ratio of COPs.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Ideally, I’d like to keep WSHP capacity constant and use the changing efficiency to make the units consume more electricity. I’ve tried both hard-inputting zone capacities under the Air-Side HVAC section as well as using the Heat Sizing Ratio; neither strategy resulted in constant natural gas use.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>My hourly reports seem to indicate that the boiler is allocated less load whenever I lower the heat pumps’ COPs. Does anybody know how I might be able to keep load allocation constant between runs? Overall, I’d like the WSHPs to deliver the same amount of heat regardless of efficiency, but use more electricity in doing so.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Thank you very much!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width="100%" style='width:100.0%'><tr><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'><p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#6A747C'>Charles Stellberger</span></b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#6A747C'><br>Energy Engineer <o:p></o:p></span></p></td></tr><tr><td colspan=4 style='padding:2.25pt 2.25pt 2.25pt 2.25pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:black'><img width=260 height=52 id="Picture_x0020_1" src="cid:image001.gif@01CE579F.37B79DC0" alt="cid:image001.gif@01CE579F.37B79DC0"><o:p></o:p></span></p></td></tr><tr><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#6A747C'>274 Summer Street | Boston, MA 02210<o:p></o:p></span></p></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td></tr><tr><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#6A747C'>T 617.574.8169 | F 617.423.7401 <o:p></o:p></span></p></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td></tr><tr><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'><p class=MsoNormal><a href="http://www.vanderweil.com"><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:blue'>www.vanderweil.com</span></a><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#9FCF67'> <o:p></o:p></span></p></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td><td style='padding:2.25pt 2.25pt 2.25pt 2.25pt'></td></tr></table></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>