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Fred, Edward I have also noticed that some
weather data are read differently depending on which weather data reader you
are using (either Type 15 or Type 109). The example I have found is the
weather data for Hemsby (GB) for which, when you plot the total horizontal
radiation with Type 15, the output is constantly zero, whereas when you use the
Type 109, you get the right values out. So further than checking the
connections are right, you might as well check that the weather data you are
using is not outputting zero radiation, in which case you might need to change
the weather data reader. Kind regards, François Badinier Development Engineer ICAX Ltd 1 Hatfield House
Baltic Street
West London EC1Y OST From: Edward Halawa
[mailto:Edward.Halawa@unisa.edu.au] Dear
Fred, >>My solar thermal panels are not
producing any heat or elevated temperature. As the temperature of the water
inside the panel doesn’t exceed the ambient temperature, the pumps never
start, and there is no flow. << It is hard for someone else to detect the
problem unless he/she looks directly into your TRNSYS project. It seems to me
that your control doesn’t work properly, it may be the signal formulation
or its connection (perhaps to pump or collector). >>I have verified that the
connections from the weather file and the rest of the loop are correct.
<< I am familiar with frustration that arises
when a TRNSYS project doesn’t work as expected. I used to ask a colleague
of mine to check the detailed results for me, i.e. the printed results of any
outputs from components that I suspect create the problem. You need to create a
file (I used to name it check.dat) that saves the printer (TYPE 25) outputs of
those components. Using excel, then you (or your colleague) can open the file
and go through it line by line to see if the make sense. In your case, you can try by setting a
simulation stop time of say 1 week (168 hrs) or even one day just to include
the hours when solar radiation exists. Try to run the DHW.tpf
in the TRNYS \Examples folder and compare it with the one that you developed. regards, edward From: Fred Betz [mailto:fbetz@aeieng.com] TRNSYS Users, My solar thermal panels are not producing
any heat or elevated temperature. As the temperature of the water inside the
panel doesn’t exceed the ambient temperature, the pumps never start, and
there is no flow. I have verified that the connections from
the weather file and the rest of the loop are correct. I put in the specs and IAM for this panel
from the SRCC data sheet. Any thoughts on what I might be
forgetting/doing wrong? Thanks, Fred
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