I check all of Type16 inputs and parameters, and everything seems good...
When I compare Type16 results with Grenoble Meteonorm data (from TRNSYS Library).
Results are checked in following table:
| ITH [kWh/year] |
IT_North [kWh/year] |
IT_South [kWh/year] |
IT_East [kWh/year] |
IT_West [kWh/year] |
|
| Meteonorm |
1241.6 |
383.3 |
940.8 |
740.8 |
749.1 |
| Type16 |
1239.4 |
482.0 |
971.2 |
1030.5 |
693.3 |
| Differences |
-0.2% |
+25.8% |
+3.2% |
+39.1% |
-7.5% |
Total Radiation on horizontal and south surfaces seem to be identical , whatever the calculation mode chosen.
Difference is less than 10% for West orientation, which maybe acceptable.
For East and North orientations, total radiation are very different (more than 25% btween the both calculation modes).
Total Radiation on East surface is much more higher than IT West, although values seem to be really close to each other with Meteonorm data.
Being unable to solve that issue, I decide to use Meteonorm data for radiation values calculation in my simulation, which seems to be right.
If someone have an idea...
Best regards
 www.itf.biz |
Adrien
JEZEQUEL Simulations Thermiques Dynamiques |
|
| ITF |
87, Avenue de
Chambéry 73230 St Alban Leysse FRANCE |
|
| Phone : Fax : Mail: |
+33(0) 479 750
029 +33(0) 479 852 122 a.jezequel@itf.biz |
|
Please, consider our environmental responsability before printing this email
Matt Duffy a écrit :
Dear Adrien,
Please make sure that your "solar high noon" in your data matches the "solar high noon" coming out of Type16. This may be an issue with your start time - it could be off by an hour. Also, make sure you are NOT interpolating in Type9 for your radiation data.
Best regards,
Matt Duffy
----- Original Message -----
From: a.jezequel@itf.biz
Sent: Wed, September 30, 2009, 5:43 AM
Subject: [TRNSYS-users] Problem with Type16
Dear TRNSYS users,
I try to use Type16 to obtain solar radiation on each surface (North, South, East, and West) of my building with IBH and IDH given and read by a simple data reader.
The considered building is placed in Grenoble (lat : 45.12° - long 5.42°).
I put those informations in Type16 parameters :
Parameter5 (Latitude) = 45.12 degrees
Parameter7 (Shift in Solar Time) = -15-(-5.42) = -9.58 degrees
Parameter9 (Solar Time) = 1
But beam radiation exceeds extraterrestrial radiation for 25 time-steps during the simulation. This problem occurs only for East orientation (West orientation if parameter7 is positive) whatever the tilted surface mode (Parameter3).
I have seen in TRNSYS users archive that other people have encountered problem in Type16 use, but I haven't found how to solve that issue.
Any help will be appreciated
Best regards
--
Afin de contribuer au respect de l'environnement, merci de n'imprimer cet e-mail que si nécessaire
www.itf.bizAdrien JEZEQUEL
Simulations Thermiques DynamiquesITF
87, Avenue de Chambéry
73230 St Alban Leysse
FRANCE
Phone :
Fax :
Mail:
+33(0) 479 750 029
+33(0) 479 852 122
a.jezequel@itf.biz
Please, consider our environmental responsability before printing this email