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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:"Verdana","sans-serif";color:black'>I received the following response from CanmetENERGY about WATSUN solar collector test data inputs and thought I’d share it with the group to follow up my recent post.<o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>“The equation you refer to Q = Area ((A + B dT) Akt H - (C + D dT) dT - E) is for glazed collectors where A, B, C, D and E are test parameters, Area is the area of the collector, Akt is the incidence angle modifier, H is the incoming solar radiation, dT is the temperature difference between the collector inlet and ambient air.<o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Typically, glazed collectors do not require the B & E coefficients (leave them as zero). If you do not have the second order coefficient D set it to zero as well.<o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>A = Fr (tau alpha)<br>B = 0<br>C = Fr UL<br>D = Fr UL_T<br>E = 0.”<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#000099'>Brian Turner </span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'>PE, CEM, LEED AP BD+C</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#000099'> </span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#000099'><br></span><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'>Mechanical Engineer <br></span><span style='font-size:12.0pt;font-family:"Garamond","serif";color:gray'><br><b>C</b></span><b><span style='font-size:10.0pt;font-family:"Garamond","serif";color:gray'>LARK</span></b><b><span style='font-size:12.0pt;font-family:"Garamond","serif";color:gray'> N</span></b><b><span style='font-size:10.0pt;font-family:"Garamond","serif";color:gray'>EXSEN </span></b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'><br></span><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'>Architecture & Engineering</span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'><br></span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'>6160 Kempsville Circle Suite 200A</span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'><br></span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'>Norfolk, VA 23502</span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'><br></span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'>757.455.5800 Office</span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'><br></span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'>757.455.5638 Fax</span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'><br></span></b><span style='font-size:10.0pt;font-family:"Garamond","serif";color:#000099'><a href="mailto:bturner@clarknexsen.com"><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:blue'>bturner@clarknexsen.com</span></b></a> </span><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#000099'><br></span><span style='font-size:10.0pt;font-family:"Garamond","serif";color:#000099'><a href="http://www.clarknexsen.com%20"><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:blue'>www.clarknexsen.com</span></b></a></span><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray'> </span><o:p></o:p></p></div></body></html>