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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;color:#1F497D'>Typically the amount of heat that can be recovered from refrigeration heat reclaim is from 50% to 80% of the total heat of rejection of the refrigeration system. It varies depending on the outside temperature, which causes the refrigeration system head pressure and associated heat to drop. Also, the refrigeration load placed on the refrigeration system various with the outdoor ambient air temperature. If you only have refrigeration cases and walk-ins that are all located inside of a temperature controlled store, then the actual refrigeration load is 70-80% of the typical design BTUH load, because the inside temperature of the building is like maybe 70 degrees F DB and 40 degrees F WB in winter, while the summer design is 75/55. If you have walk-in coolers that are located outside then the refrigeration BTUH load can be dropped clear down to zero at times, in which cause there is no refrigeration heat reclaim available at all. You will have to look at your particular situation and use engineering judgment accordingly. <o:p></o:p></span></font></p><p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;color:#1F497D'>If you model this you should vary the refrigeration load with the outside air temperature and maybe use like 80% of the total heat of rejection for recoverable heat. <o:p></o:p></span></font></p><p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p><p class=MsoNormal><b><i><font size=6 color=blue face="Bradley Hand ITC"><span style='font-size:24.0pt;font-family:"Bradley Hand ITC";color:blue;font-weight:bold;font-style:italic'>David A. Bastow </span></font></i></b><font size=3 color="#1f497d" face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></font></p><p class=MsoNormal><b><i><font size=3 color="#1f497d" face="Rockwell Extra Bold"><span style='font-size:12.0pt;font-family:"Rockwell Extra Bold","serif";color:#1F497D;font-weight:bold;font-style:italic'>McClure Engineering, Inc. </span></font></i></b><font size=3 color="#1f497d" face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></font></p><p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></font></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold'>From:</span></font></b><font size=2 face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Rinkesh Shah [mailto:rinkesh.shah@smithandandersen.com] <br><b><span style='font-weight:bold'>Sent:</span></b> Tuesday, November 15, 2011 6:06 PM<br><b><span style='font-weight:bold'>To:</span></b> equest-users@lists.onebuilding.org<br><b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] Heat Recovery from Refrigeration<o:p></o:p></span></font></p></div></div><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Hi eQuesters,<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>I am modeling a big box store that uses heat reclaim loop to recover energy from their refrigeration load. The store is to be located in Toronto, Canada.<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>I was wondering if anyone on these boards has had experience with using heat recovery in the refrigeration section of the zones?<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>I am hesitant on using the numbers I get from the Heat recovery feature in the refrigeration portion, as I can’t see the math behind it. <o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Help files do not explain how this works and the hourly report doesn’t have category specific to heat recovery from refrigeration.<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Also if anyone has had experience even with what type of % reduction on the heating, that would be useful too.<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Thanks,<o:p></o:p></span></font></p><p class=MsoNormal><b><font size=3 color="#948983" face=Arial><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:#948983;font-weight:bold'>Smith </span></font></b><b><font size=3 color="#ea761f" face=Arial><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:#EA761F;font-weight:bold'>+ Andersen<o:p></o:p></span></font></b></p><p class=MsoNormal><font size=3 color="#948983" face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#948983'><o:p> </o:p></span></font></p><p class=MsoNormal><b><font size=2 color="#ea761f" face=Arial><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#EA761F;font-weight:bold'>Rinkesh Shah,</span></font></b><font size=2 color="#948983" face=Arial><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#948983'> B. A. 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