<div dir="ltr"><p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">Dear Officer of Trnsys:</span></p><p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">I have encountered an abnormal problem when using type 170a & type 170 d. A detailed description is shown below. </span><span style="font-size:10.5pt">Please check if it's a programming bug.</span></p><p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">Type 170a: </span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US"> </span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">When parameters are set as the table below and leave other parameters as default, the output of the <b>Required cooling water
flow rate </b>is 1.417, </span></p>

<table class="gmail-MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse:collapse;border:none">
 <tbody><tr style="height:17.6pt">
  <td width="472" valign="top" style="width:354.15pt;border:1pt solid windowtext;padding:0cm 5.4pt;height:17.6pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">Number of cells in series per stack</span></b></p>
  </td>
  <td width="81" valign="top" style="width:60.65pt;border-top:1pt solid windowtext;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:none;padding:0cm 5.4pt;height:17.6pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">100</span></p>
  </td>
 </tr>
 <tr style="height:17.55pt">
  <td width="472" valign="top" style="width:354.15pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt;height:17.55pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">Electrode area</span></b></p>
  </td>
  <td width="81" valign="top" style="width:60.65pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt;height:17.55pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">7500</span></p>
  </td>
 </tr>
 <tr>
  <td width="472" valign="top" style="width:354.15pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">Current needed from stack       </span></b></p>
  </td>
  <td width="81" valign="top" style="width:60.65pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">1000</span></p>
  </td>
 </tr>
</tbody></table>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">While if set <b>Electrode area</b> to 8500,
the <b>Required cooling water flow rate would be </b>11.18, which is an
abnormal increase. </span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US"> </span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">The table below shows outputs under other
conditions, the <b>heat energy calculated</b> according to the water flow rate
and <b>temp rise</b>, and <b>the power out</b> given by the unit.</span></p>

<table class="gmail-MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse:collapse;border:none">
 <tbody><tr>
  <td width="113" valign="top" style="width:84.8pt;border:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">Electrode area</span></b><span lang="EN-US"> </span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:1pt solid windowtext;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">Required cooling water flow rate (m3/hr)</span></b><span lang="EN-US"></span></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:1pt solid windowtext;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">Calculated heat(default TEMPrise = 20
  C)/ FC Power out(W)</span></b></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">9000</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">4.344 </span></b></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">101118(W)/83279</span></b></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">8400</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">42.02</span></b></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><b><span lang="EN-US">978134/82707</span></b></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">8300</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0</span></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0</span></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">8200</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0</span></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0</span></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">8100</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0</span></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0</span></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">8000</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0</span></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0</span></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">7900</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0.3359</span></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">7819/82189</span></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">7800</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">0.7451</span></p>
  </td>
  <td width="279" valign="top" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">17344/82081</span></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">7200</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">1.753</span></p>
  </td>
  <td width="279" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US" style="font-size:11pt;color:black">40805/81388</span><span lang="EN-US"></span></p>
  </td>
 </tr>
 <tr>
  <td width="113" valign="top" style="width:84.8pt;border-right:1pt solid windowtext;border-bottom:1pt solid windowtext;border-left:1pt solid windowtext;border-top:none;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">7000</span></p>
  </td>
  <td width="161" valign="top" style="width:120.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">1.900</span></p>
  </td>
  <td width="279" style="width:209.5pt;border-top:none;border-left:none;border-bottom:1pt solid windowtext;border-right:1pt solid windowtext;padding:0cm 5.4pt">
  <p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US" style="font-size:11pt;color:black">44227/81141</span></p>
  </td>
 </tr>
</tbody></table>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">The above trend of <b>hot water flow rate</b>
change with the <b>Electrode area</b> is abnormal, the <b>hot water flow rate</b> between
8000 and 8300 should not be 0.</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US"> </span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">Similar mistakes happen in <b>Type 170d</b>:</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">When parameters are set as below:</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">1: <b>Number of cells in series per stack     100</b></span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">2: <b>Number of stacks in parallel per
module</b>   25</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">3: <b>Electrode area</b>  8000</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">4: <b>Required Current</b> 1000</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">The <b>hot water flow rate</b> is 0.</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US"> </span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">When parameters are set as below:</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">1: <b>Number of cells in series per stack</b>     100</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">2: <b>Number of stacks in parallel per
module</b>   2</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">3: <b>Electrode area</b>  7500</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">4: <b>Required Current</b> 1000</span></p>

<p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">The <b>hot water flow rate</b> is 0.</span></p><p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US"><br></span></p><p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">Best regards,</span></p><p class="MsoNormal" style="margin:0cm;text-align:justify;font-size:10.5pt;font-family:等线"><span lang="EN-US">XH Zhang</span></p></div>