Energy and Daylighting Evaluation of Integrated Semitransparent Photovoltaic Windows with Internal Light Shelves in Open-Office Buildings

Table 13

UDI thresholds in cardinal orientations under clear sky condition (Riyadh city).

Orientation (Riyadh)	South	East	North	West	South	East	North	West	South	East	North	West
Configuration (STPV)	UDI <100				UDI 100–2000				UDI >2000
R. model	0	0	0	0	75	82	99	73	25	18	1	27
STPV 10%	100	100	100	100	0	0	0	0	0	0	0	0
STPV 20%	88	89	100	82	12	11	0	18	0	0	0	0
STPV 30%	66	76	96	66	34	24	4	34	0	0	0	0
STPV 10% 75%	32	59	81	47	68	41	19	53	0	0	0	0
STPV 20% 75%	40	62	91	52	60	38	9	48	0	0	0	0
STPV 30% 75%	16	47	59	30	84	53	41	70	0	0	0	0
STPV 10% 50%	6	15	20	9	92	83	80	86	2	2	0	5
STPV 20% 50%	3	12	15	6	95	85	85	89	2	3	0	5
STPV 30% 50%	1	7	8	2	96	89	92	91	3	3	0	6