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<div dir="ltr" data-setdir="false">Thanks Brian for your help.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I checked the PS-H report and found that the DHW loop flow and the coil load is infinity as per the screen shot below. Do you think this is the problem? what could be the reason?</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Looking forward for your advice.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Regards</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><img title="Inline image" alt="Inline image" src="cid:0f4f1c26-0417-4eff-476d-77628e4e022e@yahoo.com" class="yahoo-inline-image" draggable="false" style="max-width: 800px; width: 100%;" data-inlineimagemanipulating="true" data-id="<0f4f1c26-0417-4eff-476d-77628e4e022e@yahoo.com>"><br><span></span><br></div><div><br></div>
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On Monday, September 27, 2021, 09:47:17 PM GMT+10, Brian Fountain <brian.fountain@sa-footprint.com> wrote:
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;">I am not aware of a general issue with DHW in eQUEST with regards to the schedules so I suspect it is a project specific issue – at which point sharing the .inp
may be helpful. I have been surprised at the impact of the UA value in the DHW heater on the heater’s efficiency, but as the loads change, the natural gas input will also.</span></p>
<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"> </span></p>
<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;">Quick checks:</span></p>
<p class="ydp4704dda8yiv2410073866MsoListParagraph"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"><span>-<span style="font-style: normal; font-weight: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: New;">
</span></span></span><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;">Are the schedules linked as you expect? Daily->weekly->annual->DHW Loop Process Load</span></p>
<p class="ydp4704dda8yiv2410073866MsoListParagraph"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"><span>-<span style="font-style: normal; font-weight: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: New;">
</span></span></span><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;">Are the changes being masked by other gas uses? i.e. check the PS-H report in the .sim for the DHW heater – is the load and response there changing?</span></p>
<p class="ydp4704dda8yiv2410073866MsoListParagraph"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"><span>-<span style="font-style: normal; font-weight: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: New;">
</span></span></span><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;">Check the Process T of your DHW loop. If it is lower than the DHW loop temperature, the DHW flow is “mixed” at the tap with the incoming water temperature
reducing the DHW loop flow. Perhaps this is set much too low?</span></p>
<p class="ydp4704dda8yiv2410073866MsoListParagraph"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"><img id="ydp4704dda8yiv2410073866Picture_x0020_1" style="width: 623px; max-width: 623px;" src="cid:IRmoa6RezHCGkZhosYQw" data-inlineimagemanipulating="true"></span><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"></span></p>
<p class="ydp4704dda8yiv2410073866MsoListParagraph"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"> </span></p>
<p class="ydp4704dda8yiv2410073866MsoListParagraph"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"> </span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;">Brian</span></p>
<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:11.0pt;font-family:sans-serif;color:#1F497D;"> </span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><b><span style="font-size:11.0pt;font-family:sans-serif;">From:</span></b><span style="font-size:11.0pt;font-family:sans-serif;"> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Ahmad Fraij via Equest-users<br clear="none">
<b>Sent:</b> Monday, September 27, 2021 3:51 AM<br clear="none">
<b>To:</b> Fraij via Equest-users <equest-users@lists.onebuilding.org><br clear="none">
<b>Subject:</b> [Equest-users] Changing DHW Schedule Does not Change the Gas Consumption</span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"> </p>
<p class="ydp4704dda8yiv2410073866MsoNormal">CAUTION: EXTERNAL SENDER </p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Hello Guys,</span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;"> </span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">I am changing the fraction in the Domestics Hot Water (DHW) schedules in eQUEST but the gas consumption is not changing. Does anybody encountered something like that?</span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;"> </span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">I spent a lot of time trying to fix it but I could not. Your help will be highly appreciated.</span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;"> </span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Thank you.</span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;"> </span></p>
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<p class="ydp4704dda8yiv2410073866MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Ahmad</span></p>
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