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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:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I would either use a WSHP or a chilled water system with 0 pumping energy. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Cory Duggin, PE, LEED AP BD+C <o:p></o:p></span></b></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#333333'>Associate/Energy Engineer<o:p></o:p></span></i></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#006363'>TLC Engineering for Architecture </span></b><span style='color:#1F497D'><o:p></o:p></span></p></div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>direct: </span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>615-346-1939</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Bldg-sim [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Rathna Shree<br><b>Sent:</b> Wednesday, May 27, 2015 2:18 AM<br><b>To:</b> BldgSim Mailing List; equest-users@onebuilding.org<br><b>Subject:</b> [Bldg-sim] VRF performance curve<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id="yui_3_16_0_1_1432709861102_2418"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Dear All,<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2532"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2563"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>I worked on a couple of projects in equest using the VRF performance curves from Daikin and LG. The methodology i followed is as below:<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2596"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2597"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>1) Modelled packaged VAV with minimum flow ratio 1. <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2628"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>2) Created systems based on number of ODU's and assigned multiple zones to the respective ODU. (Just like modelling a AHU)<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2793"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>3) Inputted the ODU Cooling capacity and supply flow<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2629"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>4) Fans will be constant volume.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2630"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>5) Since it is a cooling only system, i assigned only the "Cool EIR - fEWB-OAT", "Cool-EIR-fPLR" and "Cool cap-fEWB&OAT" curves. Rest were all default DX unit curves.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2736"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2856"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'> PVAV system is used as PSZ system cannot handle multiple zones well thus causing unmet hours.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2858"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2735"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>I did 2 trials, one with default DX curves and the other with performance curves from LG and Daikin. The results showed a decrease in cooling energy consumption by more than 30% thus impacting the overall energy consumption by more than 10%. <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2748"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2829"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Is the simulation methodology and results appropriate? I feel the savings is on a higher side.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2871"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2872"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Please advise.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2830"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2853"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Regards,<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1432709861102_2854"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Rathnashree<o:p></o:p></span></p></div></div></div></body></html>