[TRNSYS-users] Surprising phenomenon with Type 67

[Enertech]

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 at club-internet.fr
Web  : http://sidler.club.fr
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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)
90.0	 ! Obstruction height for	Sud	0	angle	1	(	-180	to	-165	)
90.0	 ! Obstruction height for	Sud	0	angle	2	(	-165	to	-150	)
90.0	 ! Obstruction height for	Sud	0	angle	3	(	-150	to	-135	)
90.0	 ! Obstruction height for	Sud	0	angle	4	(	-135	to	-120	)
90.0	 ! Obstruction height for	Sud	0	angle	5	(	-120	to	-105	)
90.0	 ! 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	)
90.0	 ! Obstruction height for	Sud	0	angle	19	(	90	to	105	)
90.0	 ! Obstruction height for	Sud	0	angle	20	(	105	to	120	)
90.0	 ! Obstruction height for	Sud	0	angle	21	(	120	to	135	)
90.0	 ! Obstruction height for	Sud	0	angle	22	(	135	to	150	)
90.0	 ! Obstruction height for	Sud	0	angle	23	(	150	to	165	)
90.0	 ! Obstruction height for	Sud	0	angle	24	(	165	to	180	)