Dear Diego,Thanks for this advice, I was using version 16.01.0002 and with version 16.01.0003 the error did not occured again.
However, I've got some additional questions on Type 67:I've realised the following experience: I've used Type67 without shadings (angular height equal to 0°) and Type34 without shadings (overhang projection and wingwalls projection equal to 0). Direct and diffuse radiation should not change. Actually, diffuse radiation vary. It's sometimes even greater after Type34 than before! Another phenomenon : I've tried the experience with a "detailed" angular obstruction data file (24 surface angles) and a simplified one (4 surface angles): it turns out that with the simplified obstruction data file, diffuse radiation after Type34 varies with a greater amplitude.
.tpf, angular obstruction data files (normal and simplified) and printed values of total and beam radiations are attached to this e-mail.
Given these results, and since solar gains is probably the most important phenomenon to assess building energy performance, I would be gratefull for any explanation. The following questions might help: 1 - On weather data, which sky model should we use? Given that Type34 probably use an isotropic sky model, I used this one in the weather data. 2 - In angular obstruction data files, for angles directed inside the building (eg 0° for North orientation), which angular height should be used? (0°, 90°, it doesn' matter?)
Finally, questions about basic use type 67 follow :5 - I cannot use more than 20 orientations with type 67 eventhough the max is 40 in the proforma. Can you help me? 6 - Besides, I did not manage to use 2 type 67 at the same time. I made a few tests using 2 type 67 and it always generate an error of reading of the external file, while both types 67 work alone. Is there a bug somewhere?
Thanks in advance for you help, Best regards, At 22:20 04/06/2007, you wrote:
Dear David,I was not able to reproduce the error. Which version that you are running? (16.01.xxxx)Please try downloading the latest version 16.01.0003. Best regards, Diego Enertech wrote:Dear Trnsys Users, I've identified quite a strange phenomenon with Type 67.I've used an empty shading mask for south orientation, that is, angular height from azimuth -90° to 90° is 0, and it's 90 form 90° to 180° and from -180° to -90°. The shading mask has no effect on beam radiation except... each day at 13 o'clock, as you can see on the printed values of the beam radiation before and after the shading mask. At 13 o'clock, the shading mask turns the beam radiation to 0..tpf, mask and printed values are attached to this e-mail. Do you have any explanation ? Thanks in advance for your help, Best regards, =========================== David Chénier ENERTECH F-26160 FELINES SUR RIMANDOULE tel-fax : 04 75 90 18 54 Email : sidler@club-internet.fr Web : http://sidler.club.fr ================================-- Diego A. Arias TRNSYS Coordinator Solar Energy Laboratory University of Wisconsin - Madison 1500 Engineering Drive Madison, WI 53706
=========================== ENERTECH F-26160 FELINES SUR RIMANDOULE tel-fax : 04 75 90 18 54 Email : sidler@club-internet.fr Web : http://sidler.club.fr ================================
Attachment:
Results.xls
Description: Binary data
Attachment:
Results_Simplified.xls
Description: Binary data
1 ! ID for each orientation (or opening) 90 ! Slope for each orientation 0 ! Azimuth for each orientation -180 -165 -150 -135 -120 -105 -90 -75 -60 -45 -30 -15 0 15 30 45 60 75 90 105 120 135 150 165 ! View angles - ALWAYS (-180:step:180-step) 0.0 ! Obstruction height for Sud 0 angle 1 ( -180 to -165 ) 0.0 ! Obstruction height for Sud 0 angle 2 ( -165 to -150 ) 0.0 ! Obstruction height for Sud 0 angle 3 ( -150 to -135 ) 0.0 ! Obstruction height for Sud 0 angle 4 ( -135 to -120 ) 0.0 ! Obstruction height for Sud 0 angle 5 ( -120 to -105 ) 0.0 ! Obstruction height for Sud 0 angle 6 ( -105 to -90 ) 0.0 ! Obstruction height for Sud 0 angle 7 ( -90 to -75 ) 0.0 ! Obstruction height for Sud 0 angle 8 ( -75 to -60 ) 0.0 ! Obstruction height for Sud 0 angle 9 ( -60 to -45 ) 0.0 ! Obstruction height for Sud 0 angle 10 ( -45 to -30 ) 0.0 ! Obstruction height for Sud 0 angle 11 ( -30 to -15 ) 0.0 ! Obstruction height for Sud 0 angle 12 ( -15 to 0 ) 0.0 ! Obstruction height for Sud 0 angle 13 ( 0 to 15 ) 0.0 ! Obstruction height for Sud 0 angle 14 ( 15 to 30 ) 0.0 ! Obstruction height for Sud 0 angle 15 ( 30 to 45 ) 0.0 ! Obstruction height for Sud 0 angle 16 ( 45 to 60 ) 0.0 ! Obstruction height for Sud 0 angle 17 ( 60 to 75 ) 0.0 ! Obstruction height for Sud 0 angle 18 ( 75 to 90 ) 0.0 ! Obstruction height for Sud 0 angle 19 ( 90 to 105 ) 0.0 ! Obstruction height for Sud 0 angle 20 ( 105 to 120 ) 0.0 ! Obstruction height for Sud 0 angle 21 ( 120 to 135 ) 0.0 ! Obstruction height for Sud 0 angle 22 ( 135 to 150 ) 0.0 ! Obstruction height for Sud 0 angle 23 ( 150 to 165 ) 0.0 ! Obstruction height for Sud 0 angle 24 ( 165 to 180 )
Attachment:
Shading.tpf
Description: Binary data
1 ! ID for each orientation (or opening) 90 ! Slope for each orientation 0 ! Azimuth for each orientation -180 -90 0 90 ! View angles - ALWAYS (-180:step:180-step) 0.0 ! Obstruction height for Sud 0 angle 1 ( -180 to -90 ) 0.0 ! Obstruction height for Sud 0 angle 2 ( -90 to 0 ) 0.0 ! Obstruction height for Sud 0 angle 3 ( 0 to 90 ) 0.0 ! Obstruction height for Sud 0 angle 4 ( 90 to 180 )