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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I met the same problem. Maybe it is a bug of equest. If my memory is right, I think eQuest before 3.63 could do ice storage correctly.<o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>

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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]

<b>On Behalf Of </b>WangWendy<br>

<b>Sent:</b> 2013</span><span lang="ZH-CN" style="font-size:10.0pt">年</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">5</span><span lang="ZH-CN" style="font-size:10.0pt">月</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">31</span><span lang="ZH-CN" style="font-size:10.0pt">日</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">

 18:14<br>

<b>To:</b> </span><span lang="ZH-CN" style="font-size:10.0pt">冷面寒枪</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">; Equest-users@lists.onebuilding.org<br>

<b>Subject:</b> Re: [Equest-users] </span><span lang="ZH-CN" style="font-size:10.0pt">回复：</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE:

</span><span lang="ZH-CN" style="font-size:10.0pt">回复：</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">[Equest-users ] Thermal storage tank doesn't work belo w zero degree<o:p></o:p></span></p>

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<p class="MsoNormal"><o:p> </o:p></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif"">enclosed are the screenshot. You may see both the water side system and the propertites panel of storage tank. Charge temperature now is 32 F( 0 C) due to the reason i mentioned. Another two

 attachement are the screenshot of charge loop and discharge loop.<br>

<br>

 <o:p></o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif"">From: <a href="mailto:503271081@qq.com">

503271081@qq.com</a><br>

To: <a href="mailto:silver_mirror@msn.com">silver_mirror@msn.com</a>; <a href="mailto:equest-users@lists.onebuilding.org">

equest-users@lists.onebuilding.org</a><br>

Subject: <span lang="ZH-CN">回复：</span> RE: <span lang="ZH-CN">回复：</span>[Equest-users ] Thermal storage tank doesn't work belo w zero degree<br>

Date: Fri, 31 May 2013 17:59:53 +0800<br>

<br>

can you provide the water side system screenshot in eQUEST or attach your inp and pd2 file in Email.

<o:p></o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif""><o:p> </o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif""><o:p> </o:p></span></p>

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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial Narrow","sans-serif"">------------------ </span><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">原始邮件</span><span style="font-size:9.0pt;font-family:"Arial Narrow","sans-serif""> ------------------<o:p></o:p></span></p>

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<p class="MsoNormal" style="background:#EFEFEF"><b><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">发件人</span></b><b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">:</span></b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">

 "WangWendy"; <o:p></o:p></span></p>

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<p class="MsoNormal" style="background:#EFEFEF"><b><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">发送时间</span></b><b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">:</span></b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">

 2013<span lang="ZH-CN">年</span>5<span lang="ZH-CN">月</span>31<span lang="ZH-CN">日</span>(<span lang="ZH-CN">星期五</span>)

<span lang="ZH-CN">下午</span>5:54<o:p></o:p></span></p>

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<p class="MsoNormal" style="background:#EFEFEF"><b><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">收件人</span></b><b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">:</span></b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">

 "<span lang="ZH-CN">冷面寒枪</span>"; "<a href="mailto:Equest-users@lists.onebuilding.org">Equest-users@lists.onebuilding.org</a>";

<o:p></o:p></span></p>

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<p class="MsoNormal" style="background:#EFEFEF"><b><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">主题</span></b><b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">:</span></b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">

 RE: <span lang="ZH-CN">回复：</span>[Equest-users ] Thermal storage tank doesn't work belo w zero degree<o:p></o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif""><o:p> </o:p></span></p>

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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"微软雅黑","sans-serif"">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>

<br>

Any other possibility besides the charge/discharge rate?<br>

<br>

Thank you all the same.<br>

<br>

<o:p></o:p></span></p>

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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"微软雅黑","sans-serif""><br>

From: <a href="mailto:503271081@qq.com" target="_blank">503271081@qq.com</a><br>

To: <a href="mailto:silver_mirror@msn.com" target="_blank">silver_mirror@msn.com</a>;

<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>

Subject: <span lang="ZH-CN">回复：</span>[Equest-users] Thermal storage tank doesn't work below zero degree<br>

Date: Fri, 31 May 2013 17:32:17 +0800<br>

<br>

<o:p></o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif"">you must Specifies the maximum rateat which the storage component can discharge and discharge

<span lang="ZH-CN">。</span><o:p></o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif""> <img border="0" width="273" height="187" id="_x0000_i1027" src="cid:image001.png@01CE5E2D.2D6A3F00"><o:p></o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif""><o:p> </o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif""><o:p> </o:p></span></p>

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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial Narrow","sans-serif"">------------------

</span><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">原始邮件</span><span style="font-size:9.0pt;font-family:"Arial Narrow","sans-serif""> ------------------<o:p></o:p></span></p>

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<p class="MsoNormal" style="background:#EFEFEF"><b><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">发件人</span></b><b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">:</span></b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">

 "WangWendy"; <o:p></o:p></span></p>

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<p class="MsoNormal" style="background:#EFEFEF"><b><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">发送时间</span></b><b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">:</span></b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">

 2013<span lang="ZH-CN">年</span>5<span lang="ZH-CN">月</span>31<span lang="ZH-CN">日</span>(<span lang="ZH-CN">星期五</span>)

<span lang="ZH-CN">下午</span>2:55<o:p></o:p></span></p>

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<p class="MsoNormal" style="background:#EFEFEF"><b><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">收件人</span></b><b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">:</span></b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">

 "<a href="mailto:Equest-users@lists.onebuilding.org" target="_blank">Equest-users@lists.onebuilding.org</a>";

<o:p></o:p></span></p>

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<p class="MsoNormal" style="background:#EFEFEF"><b><span lang="ZH-CN" style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">主题</span></b><b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">:</span></b><span style="font-size:9.0pt;font-family:"微软雅黑","sans-serif"">

 [Equest-users] Thermal storage tank doesn't work below zero degree<o:p></o:p></span></p>

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<p class="MsoNormal"><span style="font-family:"微软雅黑","sans-serif""><o:p> </o:p></span></p>

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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello everyone</span><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">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 lang="ZH-CN" style="font-size:11.0pt;color:#1F497D">℃</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> and is leaving at

 -3</span><span lang="ZH-CN" style="font-size:11.0pt;color:#1F497D">℃</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">. Freeze temp is below -10</span><span lang="ZH-CN" style="font-size:11.0pt;color:#1F497D">℃</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">.

 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 lang="ZH-CN" style="font-size:11.0pt;color:#1F497D">℃</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">.

 When the charge temperature is above or  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><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Does anyone have any thoughts how to solve this problem? Making storage tank work below 0</span><span lang="ZH-CN" style="font-size:11.0pt;color:#1F497D">℃</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">

 at setting temperature? Or is this the limit of eQuest software yet to be solved?</span><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Many thanks</span><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Wendy</span><span style="font-family:"微软雅黑","sans-serif""><o:p></o:p></span></p>

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