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<body class='hmmessage'><div dir='ltr'><font size="3">Dear all, </font><h1><span style="font-weight: normal;"><font size="3">In the type743¡¯s document, there is an equation743.1 about P, which is power drawn the pump, as following:</font></span></h1><h1><span style="font-weight: normal;"><font size="3">P=a0+a1(m/mrated)+ a2(m/mrated)2+ a3(m/mrated)3+¡¡¡..</font></span></h1><h1><span style="font-weight: normal;"><font size="3">In the type743¡¯s parameter setting, parameter number 5 is set to¡°number of power coefficients¡±,if I input ¡°3¡±then the parameter number6¡¢7 ¡¢8 is as following£º</font></span></h1><h1><span style="font-weight: normal;"><font size="3">power coefficient-1</font></span></h1><h1><span style="font-weight: normal;"><font size="3">power coefficient-2</font></span></h1><h1><span style="font-weight: normal;"><font size="3">power coefficient-3</font></span></h1><h1><span style="font-weight: normal;"><font size="3">And the explanation about the coefficient is ¡°The value of the polynomial multiplier for the relationship between normalized pump power and normalized pump flow rate¡±.</font></span></h1><h1><span style="font-weight: normal;"><font size="3">My question is:</font></span></h1><h1><span style="font-weight: normal;"><font size="3">1)whether a1¡¢a2 a3 is correspond to power coefficient-1¡¢power coefficient-2 and power coefficient-3 respectively? if yes, how to set the value </font></span><span style="font-size: 12pt; font-weight: normal;">a0? or i just need fitting an equation that </span><span style="font-size: 12pt; font-weight: normal;">a0 is zero?</span></h1><h1><span style="font-weight: normal;"><font size="3">2)If not ,what is the right relationship between them?</font></span></h1><h1><span style="font-weight: normal;"><font size="3">In addition, I referred to an example named ¡°pumps with flow rate known¡± in Tess models of TRNSYS software, the type743¡¯s parameter 5 is set to 3, and the parameter6 and 7 (power coefficient-1¡¢power coefficient-2) are both 0, while parameter 8 is set to 1. The similar situation setting could be found in other types such as TYPE510¡¯s power coefficient.</font></span></h1><div><span lang="EN-US" style="font-family: Calibri, sans-serif;"><font size="3">Thank
you very much help me out of this issue.</font></span></div><div><span lang="EN-US" style="font-family: Calibri, sans-serif;"><font size="3"><br></font></span></div><div><span lang="EN-US" style="font-family: Calibri, sans-serif;"><font size="3">With best regards</font></span></div><div><span lang="EN-US" style="font-family: Calibri, sans-serif;"><font size="3"><br></font></span></div><div><span lang="EN-US" style="font-family: Calibri, sans-serif;"><font size="3">Yours sinscerely</font></span></div><div><span style="font-size: 12pt; font-family: Calibri, sans-serif;">Weiwei</span></div><div><span lang="EN-US" style="font-family: Calibri, sans-serif;"><font size="3"><br></font></span></div><div><span lang="EN-US" style="font-family: Calibri, sans-serif;"><font size="3">Chongqing university</font></span></div><div><span lang="EN-US" style="font-family: Calibri, sans-serif;"><font size="3"><br></font></span></div><h1><span style="font-size: 19px; font-weight: normal;"><br></span></h1><h1><span style="font-size: 19px; font-weight: normal;"> </span></h1><h1><span style="font-size: 19px; font-weight: normal;"><br></span></h1><h1><span style="font-size: 19px; font-weight: normal;">Thank you very much help me out of this issue. </span></h1> </div></body>
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