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Hello Energy Modelers,</div>
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This is regarding to increased cooling consumption while modelling DCV in eQUEST.I have prepared a hourly analysis on a single zone modeled without and with DCV, hourly result is attached.</div>
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<b><span style="font-size: 14pt; line-height: normal;">Modeling Inputs <br>
</span></b></div>
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<span style="font-size: 10pt; line-height: normal; color: rgb(12, 100, 192);">Project Location :
<b>Bangalore India</b> <b>(moderate climate)</b>. </span></li><li style="font-family: "segoe ui", "segoe ui web (west european)", "segoe ui", -apple-system, blinkmacsystemfont, "roboto", "helvetica neue", sans-serif; font-size: 12pt; color: rgb(51, 51, 51); background-color: rgba(0, 0, 0, 0);">
<span style="font-size: 10pt; line-height: normal; color: rgb(12, 100, 192);">Occupancy profile :
<b>90%</b> in office hours and <b>50%</b> in lunch hours</span></li><li style="font-family: "segoe ui", "segoe ui web (west european)", "segoe ui", -apple-system, blinkmacsystemfont, "roboto", "helvetica neue", sans-serif; font-size: 12pt; color: rgb(51, 51, 51); background-color: rgba(0, 0, 0, 0);">
<span style="font-size: 10pt; line-height: normal; color: rgb(12, 100, 192);">Minimum air schedule is modeled in air side and minimum control is set to<b> DCV reset down.</b></span></li></ol>
<span style="font-size: 10pt; line-height: normal; color: rgb(12, 100, 192);"></span><span style="font-size: 10pt; line-height: normal; color: rgb(12, 100, 192);">The outcomes are summarize below:</span>
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<table style="border-collapse:
collapse;width:324pt" width="433">
<colgroup><col style="width:48pt" width="64" span="2"><col style="mso-width-source:userset;mso-width-alt:4608;width:97pt" width="130"><col style="mso-width-source:userset;mso-width-alt:3612;width:76pt" width="102"><col style="mso-width-source:userset;mso-width-alt:2588;width:55pt" width="73"></colgroup>
<tbody>
<tr style="height:14.4pt" height="19">
<td colspan="4" style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; text-align: center; background: rgb(0, 176, 80) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); height:14.4pt; width:269pt" width="360" height="19">
=Without DCV-With DCV</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(0, 176, 80) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); width:55pt" width="73">
Remarks<span style="mso-spacerun:yes"> </span></td>
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<tr style="height:14.4pt" height="19">
<td colspan="3" style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; background: rgb(146, 208, 80) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); height: 14.4pt; text-align: center;" height="19" align="right">
Difference in supply air flow (btu)</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; background: rgb(198, 224, 180) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); text-align: center;" align="center">
2,98,886</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; background: rgb(226, 239, 218) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); text-align: center;" align="center">
Reduced</td>
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<tr style="height:14.4pt" height="19">
<td colspan="3" style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(146, 208, 80) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); height:14.4pt; mso-ignore:colspan" height="19" align="right">
Difference in latent (btu)</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(198, 224, 180) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212)" align="center">
0</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(226, 239, 218) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212)" align="center">
No change</td>
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<td colspan="3" style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(146, 208, 80) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); height:14.4pt; mso-ignore:colspan" height="19" align="right">
Difference in total tonnage (TR)</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(198, 224, 180) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212)" align="center">
-1,764</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(226, 239, 218) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212)" align="center">
Increased</td>
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<td colspan="3" style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(146, 208, 80) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); height:14.4pt; mso-ignore:colspan" height="19" align="right">
Difference in fresh air (CFM)</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(198, 224, 180) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212)" align="center">
8,51,210</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(226, 239, 218) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212)" align="center">
Reduced</td>
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<tr style="height:14.4pt" height="19">
<td colspan="3" style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(146, 208, 80) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212); height:14.4pt; mso-ignore:colspan" height="19" align="right">
Difference in vent fan consumption (kW)</td>
<td style="padding-top: 1px; padding-right: 1px; padding-left: 1px; color: black; font-size: 11pt; font-family: Calibri, sans-serif; vertical-align: bottom; border: medium none; background: rgb(198, 224, 180) none repeat scroll 0% 0%; border: 1px solid rgb(212, 212, 212)" align="center">
32</td>
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Reduced</td>
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<b><span style="font-size: 14pt; line-height: normal;">Queries :</span></b></div>
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<ol>
<li style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: rgb(0, 111, 201); background-color: rgba(0, 0, 0, 0);">
Supply flow air and vent fan consumption is reduced, why their is an increment total cooling consumption.
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</li><li style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: rgb(0, 111, 201); background-color: rgba(0, 0, 0, 0);">
Why their is no change in Total SPACE latent heat load from LOADS (Btu/hr). <br>
</li><li style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: rgb(0, 111, 201); background-color: rgba(0, 0, 0, 0);">
What should be the correct way to model this and get efficiency. <br>
</li></ol>
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<div style="font-size:13.3333339691162px"><span style="font-size:10pt">Warm Regards </span></div>
<div style="font-size:12.8000001907349px"><font color="#000000"><span style="font-size:13.3333330154419px">Harshal Gupta</span></font></div>
<font color="#073763"><b>Energy Analyst</b></font></div>
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