<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
@font-face
{font-family:"Times New Roman \, serif";
panose-1:0 0 0 0 0 0 0 0 0 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
color:black;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
color:black;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor=white lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='color:#1F497D'>Hello Sir,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thank you very much for quick
reply. I have a question about <b>Power Coefficient</b> of Pumps and Fan.
This is a parameter which is required for calculation of power consumption of
Pump and Fan. It is a user defined value. My question is : How can I calculate
the power coefficient or there is some standard value for constant speed and
variable speed pump and Fans? Please guide me. If there is some literature about
it please specify.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Mayank <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> David BRADLEY
[mailto:d.bradley@tess-inc.com] <br>
<b>Sent:</b> Thursday, March 22, 2012 10:34 PM<br>
<b>To:</b> Mayank<br>
<b>Subject:</b> Re: [TRNSYS-users] calculation of unmet hours<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Mayank,<br>
If you have access to the TESS Utility Library, you can use the
"zone temperature watcher: Type584." When zone temperature exceeds
the setpoint, you have an "unmet hour." If you do not have Type584, you
can write an equation that has a value of 1 if the zone temperature exceeds the
setpoint temperature.<br>
<br>
On a related note, he first important thing to do is to define what you
mean by "unmet hours." In the industry, most often people refer to
"unmet load hours" If you are running your Type56 in energy rate
control mode (where you define a setpoint temperature and HEATING and COOLING
types <b><i>inside </i></b>TRNBuild and use the QSENS NTYPES to predict your
sensible energy loads) then you have the choice as to whether you limit or do
not limit the capacity of your idealized heating and cooling system. If you
limit the heating or cooling capacity then an unmet load occurs whenever the
Type56 zone temperature exceeds the cooling setpoint temperature or falls below
the heating setpoint temperature. <br>
<br>
If your building is operating in temperature level control (where you
define a thermostat, an actual HVAC system and the zone temperature reacts to
what the HVAC system is doing) then "unmet load hours" are
meaningless because the "load" is never calculated at the space level
(the space reacts to the HVAC system's operation, it only indirectly commands
the HVAC system). In this case, we typically redefine "unmet load" as
time spent outside the throttling range of the thermostat (ie above or below
the deadband). Again Type584 is used to total the amount of time.<br>
Kind regards,<br>
David<br>
<br>
On 3/19/2012 03:42, Mayank wrote: <o:p></o:p></p>
<p class=MsoNormal>Hello Everyone,<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>I need to calculate unmet hours of my system. Is there any
component in TRNSYS 16 or I have to make manual calculation.<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>Please guide me.<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>Regards,<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-family:"Times New Roman , serif","serif"'>Mayank
Bhatnagar</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-family:"Times New Roman , serif","serif"'>M.Tech.(Energy
Engineering)</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-family:"Times New Roman , serif","serif"'>Malaviya
National Institute of Technology, </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-family:"Times New Roman , serif","serif"'>Jaipur
(INDIA)</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-family:"Times New Roman , serif","serif"'>Ph.:
+91-9983816468</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre><pre>TRNSYS-users mailing list<o:p></o:p></pre><pre><a
href="mailto:TRNSYS-users@cae.wisc.edu">TRNSYS-users@cae.wisc.edu</a><o:p></o:p></pre><pre><a
href="https://mailman.cae.wisc.edu/listinfo/trnsys-users">https://mailman.cae.wisc.edu/listinfo/trnsys-users</a><o:p></o:p></pre>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>
<br>
<o:p></o:p></span></p>
<pre>-- <o:p></o:p></pre><pre>***************************<o:p></o:p></pre><pre>David BRADLEY<o:p></o:p></pre><pre>Principal<o:p></o:p></pre><pre>Thermal Energy Systems Specialists, LLC<o:p></o:p></pre><pre>22 North Carroll Street - suite 370<o:p></o:p></pre><pre>Madison, WI 53703 USA<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>P:+1.608.274.2577<o:p></o:p></pre><pre>F:+1.608.278.1475<o:p></o:p></pre><pre><a
href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre><a
href="http://www.tess-inc.com">http://www.tess-inc.com</a><o:p></o:p></pre><pre><a
href="http://www.trnsys.com">http://www.trnsys.com</a><o:p></o:p></pre></div>
</body>
</html>