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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">HI Hsien,
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Add an insignificant value in the denominator<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">[ Eff_energy = GT(m_H2,0)*(P_load+Q_heating+Q_DHW+Q_cooling)/(m_H2*LHV+0.000000001) ]<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Cheers,<br>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Hsein Moussawi<br>
<b>Sent:</b> Wednesday, 4 May 2016 9:43 PM<br>
<b>To:</b> trnsys-users@lists.onebuilding.org<br>
<b>Subject:</b> [TRNSYS-users] Error: division by zero<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Hello there,<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">I am trying to compute certain equation, but I am constantly getting the following error:<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">[ TRNSYS Message 5 : The TRNSYS Program attempted to evaluate an EQUATION that has a division by zero. Please check the EQUATION formulation and re-run
the simulation<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"> Reported information : EFF_ENERGY ]<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">I made sure to calculate the equation only when the denominator is positive as follows:<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">[ Eff_energy = GT(m_H2,0)*(P_load+Q_heating+Q_DHW+Q_cooling)/(m_H2*LHV) ]<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Any help would be appreciated...<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Regards.<o:p></o:p></span></p>
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