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<p>Emre,</p>
<p> The most correct way to calculate the solar fraction is to sum
up all of the energy consumed by the system (fans, pumps,
auxiliary heaters) for each month and then to run the system again
with the solar part of it disabled (or you can run a non-solar
comparison system in parallel) and again sum up the energy
consumed by all the equipment and divide the two by one another.
The trouble with the method that you propose is that it may not be
that all of the energy gain from the collector can be applied
against the heating load. You have losses from storage, parasitic
power from pumping, and it may be that the useful solar gain is
only available when your load is already satisfied.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 11/25/2019 14:00, Emre Arpaci via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CADBhVH2J7=vp6QUAMU196apkDHaHs14y3k4kx=qUG_cy2h_ScQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">hi trnsys users
<div>I have a question about solar fraction I m heating a space
with solar assisted heat pump. and I want to calculate solar
fraction with trnsys. I m using fan coils to heat up the
space. so how can ı calculate solar fraction.If I do that the
useful energy gain of collector in montly divided by required
heating load in montly.</div>
<div>is it give me the montly solar fraction or am i wrong ? (
I dont have dhw in my system)</div>
<div><br>
</div>
<div><br>
</div>
<div>regards</div>
</div>
<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
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