<I have seen that it requires to call Psychrometrics Routine, Moist Air Properties and Air Properties. Where can I find these property files? are they standard values and is there any reference for them?>
The psychrometrics routine can be found in the source sode/kernel directory and the file is called psych.f90. This routine uses an equation of state to calculate the remaining moist air properties given the known moist air properties. For example, I could call psych with h, T and P and get back the relative humidity and the entropy. The dry air properties can be found in the TESS Libraries\Source Code directory.
<The component requires to call data from external file containing ‘InterpolateData’. This InterpolateData gives friction capacity and power for a range of air temperature and water temperature, however I am wondering what will happen when the actual air temperature and/or water temperature is out of the range (how the calculation is carried out)? Is there any correlation used for this scenario? >
If the values are outside the range, the value at the end of the range is used - no extrapolation is done. The documentation for InterpolateData can be found in the documentation folder.
Jeff
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Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com
On 03/27/2013 12:13 pm, Zhe Li wrote:
Dear All,
Thank you for your time.
I am trying to follow the Type941 source code (since there is no mathematical description available) in order to understand how exactly this air-source-heat-pump calculates the power output. However, I have a couple of questions in regarding with it, hope somebody could help me with these:
1. I have seen that it requires to call Psychrometrics Routine, Moist Air Properties and Air Properties. Where can I find these property files? are they standard values and is there any reference for them?
2. The component requires to call data from external file containing ‘InterpolateData’. This InterpolateData gives friction capacity and power for a range of air temperature and water temperature, however I am wondering what will happen when the actual air temperature and/or water temperature is out of the range (how the calculation is carried out)? Is there any correlation used for this scenario?
Thank you very much for your help.
Zhe Li
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