Andrés,
Jeff is currently out of the office and while I am not certain, I
would be very very surprised if you were not able to specify a
different flow rate than the tested flowrate; it is standard
practice for collector models to correct for the performance impact
of running at other flow rates than the tested one. To be certain,
check the "more" button contents on the various parameters and
inputs of the model.
Kind regards,
david
On 6/29/2012 02:26, Andrés Montero
wrote:
Dear Jeff,
One more thing about Type1288. Can I use a different flow
rate than the one used to test the collector? or the type is
only intended to model collector at specific conditions?
Thank you
Andrés
2012/6/28 Andrés Montero <andresmonteroi@gmail.com>
Dear Jeff,
I wanted to be sure about how to set correctly
Type1288. I have a PTC collector which works at a flowrate
of 0.173kg/s (this flowrate is for a single collector). I
have an aperture area of 50m2 and the aperture area of a
single collector is 5.384m2, so the number of collectors
would be 9. The configuration I need is: 3 rows in
parallel with 3 collectors in series.
____________ out
l l l
X X X
I I I
X X X
I I I
X X X
l____I___ l___in
In the Proforma: Parameters-> Number in series=3,
Collector array area=50. The flowrate for the entire solar
collector array is 0.173x3 (3 rows)=0.519
Is this set correct?
Regards,
Andrés
2012/6/27 Andrés Montero <andresmonteroi@gmail.com>
Dear
Jeff,
In one of my previous emails I forgot to ask
you about the Chromasun collectors.. well I
actually did but your answer was only refering
Sopogy collectors. In order to use the radiation
processor with Type1288 as a Chromasun collector,
I guess I have to set the tracking mode to fixed
surface. Is this correct?
Best regards,
Andrés
2012/6/26 Andrés
Montero <andresmonteroi@gmail.com>
Dear Jeff,
On regard to the beam radiation on
the tilted surface used by Type288. Do I
have to correct that variable with the
cosphi? What would you recommend me to
do for the Chromasun Fresnel collector
and the Sopogy SopoNova4.1 collector?
Regards,
andrés
2012/6/21
Jeff Thornton <thornton@tess-inc.com>
I have one more
question about Type1288.
In case I'd like to
simulate this Type as a
linear Fresnel
collector, I saw that
the proforma matches the
Chromasun collector as
well as the IAM external
file. One thing that I
want to be sure is when
I link the solar
radiation processor to
Type 1288. What type of
tracking mode do I have
to select for this
specific Fresnel
collector? Do I have to
use a Fixed surface or a
single axis tracking?
What about if I use data
from the manufacturer
Sopogy (according to
test standard Solar
Rating &
Certification Corp.)
with Type1288
(EN-12975). Fixed or
single axis tracking
with Type1288?
You have to choose the
tracking mode that
reflects the operation of
the system that you are
studying. If you're using
a Sopogy collector and
they're azimuth tracking
then you'll have to use
that option in TRNSYS. If
the Sopogy collectors are
stationary in your
installation (doubtful)
then you'd used fixed
surface mode.
Jeff
--
Andrés Montero I.
+34-680705256
--
Andrés Montero I.
+34-680705256
--
Andrés Montero I.
+34-680705256
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Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
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d.bradley@tess-inc.com
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