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

Table 14

UDI thresholds in cardinal orientations under overcast sky condition (London city).

Orientation (London)	South	East	North	West	South	East	North	West	South	East	North	West
Configuration (STPV)	UDI <100				UDI 100–2000				UDI >2000
R. model	2	3	3	2	69	82	96	83	28	15	0	15
STPV 10%	100	100	100	100	0	0	0	0	0	0	0	0
STPV 20%	86	92	100	92	14	8	0	8	0	0	0	0
STPV 30%	62	78	97	78	38	22	3	22	0	0	0	0
STPV 10% 75%	37	65	95	64	62	35	5	35	1	0	0	0
STPV 20% 75%	31	59	89	57	69	41	11	42	0	0	0	0
STPV 30% 75%	25	49	73	48	74	51	27	52	1	0	0	0
STPV 10% 50%	12	21	32	21	84	76	68	77	4	3	0	3
STPV 20% 50%	11	19	27	18	85	79	73	80	4	3	0	2
STPV 30% 50%	9	14	20	14	86	83	80	83	5	3	0	0