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<p class="MsoNormal">I have found variations in published documents of the Cooling Tower Curves used in DOE2.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Specifically I am looking for the Cooling Tower formulas used in the current version of DOE2 to calculate the two variables below:<o:p></o:p></p>
<p class="MsoNormal">FRA = TWR GPM FRA<o:p></o:p></p>
<p class="MsoNormal">FWB = TWR GPM FWB<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The DOE2 Engineering Reference Manual 2.1A and subsequent Supplement 2.1E are where I am finding conflicting information about the variables f(x,y) to use for each.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">They are both Bi-Quadratics and the (a-f) coefficients are clearly and consistently stated in DOE2 documents.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">z = a + bx + cx<sup>2</sup> + dy + ey<sup>2</sup> + fxy<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">One section of the Supplement 2.1E (copied below) explains the function as:<o:p></o:p></p>
<p class="MsoNormal">FRA = f(T<sub>range</sub>, T<sub>approach</sub>)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">TWR-GPM-FRA<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Times New Roman","serif"">accepts the u-name of a CURVE-FIT instruction that defines a<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Times New Roman","serif"">bi-quadratic equation.
<span style="background:yellow;mso-highlight:yellow">That equation will be used to express an<o:p></o:p></span></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Times New Roman","serif";background:yellow;mso-highlight:yellow">intermediate variable which
</span><span style="font-size:10.5pt;font-family:"Arial","sans-serif";background:yellow;mso-highlight:yellow">is
</span><span style="font-family:"Times New Roman","serif";background:yellow;mso-highlight:yellow">a function of the range and<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Times New Roman","serif";background:yellow;mso-highlight:yellow">approach.</span><span style="font-family:"Times New Roman","serif""> The intermediate variable is in turn used in the<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">curve TWR-GPM-FWB.</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And another section of the Supplement 2.1E (copied below) explains it as<o:p></o:p></p>
<p class="MsoNormal">FRA = f(T<sub>range</sub>, FRA)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:"Times New Roman","serif"">COOLING TOWER</span><span style="font-size:6.0pt;font-family:"Arial","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:"Times New Roman","serif"">TWR-FAN-FPLR A1RCEL 0.33162901 ·0.88567609 0.60556507 0.94848233 0.00000000 0.00000000 TWRFAN
</span><span style="font-size:10.5pt;font-family:"Times New Roman","serif"">CUBIC<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:"Times New Roman","serif";background:yellow;mso-highlight:yellow">TWR-GPM-FRA RNG,FRA ·2.22888899 0.16679543 ·0.01410247 0.03222333 0.18560214
0.24251871 GPMRA B1·QUAD<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:"Times New Roman","serif"">TWR-GPM-FRB FRA,OWB 0.60531402 ·0.03554536 0.00804083 0.02860259 0.00024972 0.00490857 GPMRB B1.QUAD<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:"Times New Roman","serif"">TC-CHLR-CAP-FT Teond,Tcw ·0.351443 0.056583 ·0.600054 ·0.045625 ·0.000043 ·0.000012 CCAPT5
B1.QUAD<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Which format is used in the actual simulation?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks,<o:p></o:p></p>
<p class="MsoNormal">Noah<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="color:#292929">Noah Czech, </span></b><b><span style="font-size:10.0pt;color:#292929">AIA</span></b><span style="color:#1F497D"><br>
</span><span style="color:#5F5F5F">Staff Engineer</span><span style="color:#1F497D"> </span><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:3.0pt"><b><span style="color:#BB0000">ARCHITECTURAL ENERGY CORPORATION</span></b><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:10.0pt;color:#5F5F5F">2540 Frontier Avenue, Suite 100 | Boulder, Colorado 80301</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#5F5F5F">P: 303.459.7421</span><span lang="FR" style="font-size:10.0pt;color:#5F5F5F"> |
</span><span style="font-size:10.0pt;color:#595959"><a href="mailto:nczech@archenergy.com"><span style="color:#595959;text-decoration:none">nczech@archenergy.com</span></a></span><span style="color:#595959"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#BB0000"><a href="http://www.archenergy.com/"><span style="color:#BB0000;text-decoration:none">www.archenergy.com</span></a></span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:3.0pt"><b><i><span style="font-size:10.0pt;color:#292929">Transforming the Built Environment</span></i></b><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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