can you provide the water side system screenshot in eQUEST or attach your inp and pd2 file in Email.<div><br></div><div><br></div><div style="font-size: 12px;font-family: Arial Narrow;padding:2px 0 2px 0;">------------------ 原始邮件 ------------------</div><div style="font-size: 12px;background:#efefef;padding:8px;"><div><b>发件人:</b> "WangWendy"<silver_mirror@msn.com>; </div><div><b>发送时间:</b> 2013年5月31日(星期五) 下午5:54</div><div><b>收件人:</b> "冷面寒枪"<503271081@qq.com>; "Equest-users@lists.onebuilding.org"<equest-users@lists.onebuilding.org>; </div><div><b>主题:</b> RE: 回复：[Equest-users ] Thermal storage tank doesn't work belo w zero degree</div></div><div><br></div><style><!--
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<div dir="ltr">Of course I've set the maximum rate per design value. My problem here is the actual rate doesn't equal to the supposed value. As i mentioned below, the actual discharge/charge load/rate is zero when the entering/leaving temperature is below 0 degree. I don't think the problem comes from wrong setting of discharge/charge rate.<br>
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Any other possibility besides the charge/discharge rate?<br>
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Thank you all the same.<br>
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From: <a href="mailto:503271081@qq.com" target="_blank">503271081@qq<wbr>.com</a><br>To: <a href="mailto:silver_mirror@msn.com" target="_blank">silver_mirro<wbr>r@msn.com</a>; <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users<wbr>@lists.onebu<wbr>ilding.org</a><br>Subject: 回复：[Equest-users] Thermal storage tank doesn't work below zero degree<br>Date: Fri, 31 May 2013 17:32:17 +0800<br><br><br>
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<div>you must Specifies the maximum rateat which the storage component can discharge and discharge <span style="LINE-HEIGHT: 1.5">。</span></div>
<div><a style="LINE-HEIGHT: 1.5" href="http:///" target="_blank"> </a><img style="LINE-HEIGHT: 1.5" src="cid:E739A72E@F4106071.9974A851.216EA851"></div>
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<div style="PADDING-BOTTOM: 2px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-FAMILY: Arial Narrow; FONT-SIZE: 12px; PADDING-TOP: 2px">------------------ 原始邮件 ------------------</div>
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<div><b>发件人:</b> "WangWendy"; </div>
<div><b>发送时间:</b> 2013年5月31日(星期五) 下午2:55</div>
<div><b>收件人:</b> "<a href="mailto:Equest-users@lists.onebuilding.org" target="_blank">Equest-users<wbr>@lists.onebu<wbr>ilding.org</a>"; </div>
<div><b>主题:</b> [Equest-users] Thermal storage tank doesn't work below zero degree</div></div>
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<p style="MARGIN: 0cm 0cm 0pt" class="ecxMsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Hello everyone</span></p>
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<p style="MARGIN: 0cm 0cm 0pt" class="ecxMsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">This problem came across when I was modelling an ice-storage system. Hourly report said the charge and discharge load are both zero, which means the tank doesn’t work under the setting condition. The supposed entering temperature of the tank is -6</span><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="ZH-CN"><font face="宋体">℃</font></span><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"> and is leaving at -3</span><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="ZH-CN"><font face="宋体">℃</font></span><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">. Freeze temp is below -10</span><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="ZH-CN"><font face="宋体">℃</font></span><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">. In order to run the simulation, I have to raise the charge/discharge temperature as well as the loop temperature of charge loop up above 0</span><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="ZH-CN"><font face="宋体">℃</font></span><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">. When the charge temperature is above or<span> </span>equal to zero, the tank does work. However it changes the performance of double duty chillers under ice-making mode, since the curve of chiller is different with different leaving temperature, leading to a bigger assigned load of double duty chiller than the max charge load and less accurate results.</span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="ecxMsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"> </span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="ecxMsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Does anyone have any thoughts how to solve this problem? Making storage tank work below 0</span><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="ZH-CN"><font face="宋体">℃</font></span><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"> at setting temperature? Or is this the limit of eQuest software yet to be solved?</span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="ecxMsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"> </span></p>
<p style="MARGIN: 0cm 0cm 0pt" class="ecxMsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Many thanks</span></p>
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<p style="MARGIN: 0cm 0cm 0pt" class="ecxMsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Wendy</span></p></div></div> </div>