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<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Arial","sans-serif"'>Dear
All,<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='margin-left:27.0pt;text-indent:-27.0pt;
mso-list:l0 level2 lfo1;text-autospace:none'><![if !supportLists]><span
style='font-size:11.0pt'><span style='mso-list:Ignore'>1.<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt'>I had submitted
energy model for certification and have received following reply:<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-indent:27.0pt;text-autospace:none'><b><i><span
style='font-family:"Arial","sans-serif"'>As per table G3.1.3.7, ASHRAE
90.1.2007, “as chiller auto size capacity is more than 600 tons,
centrifugal chiller should be considered”. <o:p></o:p></span></i></b></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-left:27.0pt'><span style='font-family:"Arial","sans-serif"'>My
building conditioned area is < 22296 m<sup>2</sup> and as per model my
chiller capacity is more than 600 TR and I have to use 2 chillers. I have modeled
2 nos. screw chillers of equal capacity (auto size mode) with 5.5 COP.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-indent:27.0pt'><span style='font-family:"Arial","sans-serif"'>I
checked the table and no where it is written that we need to model centrifugal
chillers.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-indent:27.0pt'><span style='font-family:"Arial","sans-serif"'>Can
someone help me to understand where I went wrong?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='margin-left:27.0pt;text-indent:-27.0pt;
mso-list:l0 level2 lfo1;text-autospace:none'><![if !supportLists]><span
style='font-size:11.0pt'><span style='mso-list:Ignore'>2.<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt'>I had submitted
PS E report of all rotations of base case and have received following reply: <o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:27.0pt;text-autospace:none'><b><i><span
style='font-family:"Arial","sans-serif"'>Peak demand (946.52kW) reported for
cooling is not matching with chiller input (For 2*613 TR and 5.5 COP, 783kW).
So cooling savings in not justified. <o:p></o:p></span></i></b></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-left:27.0pt;text-autospace:none'><span
style='font-family:"Arial","sans-serif"'>As per first submittal comment, I had
changed my chiller to auto size mode and the chiller capacity is selected by
model and not by me. Now, I have received above comment. What is the way out?<o:p></o:p></span></p>
<p class=MsoListParagraph style='margin-left:1.0in'><span style='font-size:
11.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Rakesh Desai<o:p></o:p></span></p>
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