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Anton,<br>
In order to create a new data file you'll need to have
manufacturer's data for the machine that you want to model.
Manufacturer's data usually includes some information that shows how
the machine's cooling capacity changes as a function of the inlet
conditions. Often they give values of full-load capacity for a
number of inlet water temperatures in a table. The fraction of rated
capacity is obtained by dividing the capacity at a given set of
inlet conditions by the capacity at the machine's rated inlet
conditions. The same principal is true for the design energy input.
In the case of Type107 the design energy input is the amount of
energy that is extracted from the hot water stream at the machine's
rated condition.<br>
kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 5/10/2015 4:25 AM, Anton Åhlund
wrote:<br>
</div>
<blockquote cite="mid:DUB130-W186F36D2D74E46D87C70A3F0DC0@phx.gbl"
type="cite">
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<div dir="ltr"><span style="color: rgb(51, 51, 51); font-family:
Arial, sans-serif; font-size: 13px; line-height: 17px;
background-color: rgb(255, 255, 255);">Hi! </span><br
style="box-sizing: border-box; color: rgb(51, 51, 51);
font-family: Arial, sans-serif; font-size: 13px; line-height:
17px; background-color: rgb(255, 255, 255);">
<br style="box-sizing: border-box; color: rgb(51, 51, 51);
font-family: Arial, sans-serif; font-size: 13px; line-height:
17px; background-color: rgb(255, 255, 255);">
<span style="color: rgb(51, 51, 51); font-family: Arial,
sans-serif; font-size: 13px; line-height: 17px;
background-color: rgb(255, 255, 255);">I'm doing a master
thesis in solar cooling and I have problem with the type 107
external data file. I want to use other temperature spans then
the ones in the example data file. </span><br
style="box-sizing: border-box; color: rgb(51, 51, 51);
font-family: Arial, sans-serif; font-size: 13px; line-height:
17px; background-color: rgb(255, 255, 255);">
<br style="box-sizing: border-box; color: rgb(51, 51, 51);
font-family: Arial, sans-serif; font-size: 13px; line-height:
17px; background-color: rgb(255, 255, 255);">
<span style="color: rgb(51, 51, 51); font-family: Arial,
sans-serif; font-size: 13px; line-height: 17px;
background-color: rgb(255, 255, 255);">I can't figure out how
to calculate the <Fraction of rated capacity> and
<design energy input>, which changes depending on the
different temps. of the fluid flows (inlet hot water temp,
chilled water setpoint and cooling water temp). I have looked
carefully in the mathematical description pdf but can figure
it out. Does anyone know how to calculate this? </span>
<div><span style="color: rgb(51, 51, 51); font-family: Arial,
sans-serif; font-size: 13px; line-height: 17px;
background-color: rgb(255, 255, 255);"><br>
</span></div>
<div><span style="color: rgb(51, 51, 51); font-family: Arial,
sans-serif; font-size: 13px; line-height: 17px;
background-color: rgb(255, 255, 255);">Kind regards,</span></div>
<div><span style="color: rgb(51, 51, 51); font-family: Arial,
sans-serif; font-size: 13px; line-height: 17px;
background-color: rgb(255, 255, 255);">Anton Åhlund</span></div>
</div>
<br>
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<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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