Solar radiation model (details)
Hello!
I'm doing this tutorial: ACU-T: 3201 Solar Radiation and Thermal Shell Tutorial (https://help.altair.com/hwcfdsolvers/acusolve/topics/tutorials/acu/acu_3201_intro_hm_r.htm#acu_3201_intro_hm_r). However, I don't understand the output of the AcuSolve Command Prompt:
<span class="keyword cmdname">acuSflux -time "dec-3-2019 11:00:00" -tinc 1800 -nts 25 -lat 42.6064 -lon -83.1498 -ndir "1,0,0" -udir "0,0,1"</span>
where the output is this:
Here are my questions:
- What does each column mean?
- What database or what model is used to obtain this solar data?
- Does the solar data take clouds or another weather event into account?
- Where I can find a theory manual indicating the solar radiation model implemented in HyperWorks CFD?
Best regards,
Francisco,
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Dear @acupro
Your answer is helpful. However, the links unfortunately do not work. Could you please update this information?
Thanks in advance!
Altair EmployeeDear @acupro
Your answer is helpful. However, the links unfortunately do not work. Could you please update this information?
Thanks in advance!
This is my best guess:
Ok, thanks. I think now I can have a better understanding of the solar radiation model using in HWCFD (acusolve).
Altair EmployeeIf you issue
acuSflux -h
you will see what the various entries to the command indicate.
1 - You end with four columns in the resulting data file - time in seconds, X/Y/Z components of solar flux (the solar flux vector - input to the SOLAR_RADIATION command, with type = linear)
2 - Algorithm used in this program is a combination of
standard solar position:
altitude/pressure relationship of mid summer tables
clear sky radiation model
report (SERI/TR-215-2436)
http://rredc.nrel.gov/solar/pubs/spectral/model/
Gettotal direct solar irradiation
Extracted from spetral2
code: http://rredc.nrel.gov/solar/codes_algs/spectral/
theory: http://rredc.nrel.gov/solar/pubs/spectral/model/
3 - This all assumes clear sky, no historical weather data
4 - We only have the information in item 2 above
If you issue
acuSflux -h
you will see what the various entries to the command indicate.
1 - You end with four columns in the resulting data file - time in seconds, X/Y/Z components of solar flux (the solar flux vector - input to the SOLAR_RADIATION command, with type = linear)
2 - Algorithm used in this program is a combination of
standard solar position:
altitude/pressure relationship of mid summer tables
clear sky radiation model
report (SERI/TR-215-2436)
http://rredc.nrel.gov/solar/pubs/spectral/model/
Gettotal direct solar irradiation
Extracted from spetral2
code: http://rredc.nrel.gov/solar/codes_algs/spectral/
theory: http://rredc.nrel.gov/solar/pubs/spectral/model/
3 - This all assumes clear sky, no historical weather data
4 - We only have the information in item 2 above