Development and Performance Evaluation of Light Shelves Using Width-Adjustable Reflectors

Table 8

Performance evaluation results for a light shelf with a width-adjustable reflector.

Season	Light shelf		Illumination sensor (lx)		Uniformity ratio	Lighting dimming control: lighting number (dimming level)	Electricity consumption (kWh)
	Optimum width (m)	Angle	Minimum	Average
Summer	0.6	−10°	72.1	230.7	0.312	1 (8)→3 (8)→2 (2)	0.124
		0°	76.1	243.8	0.312	1 (8)→3 (8)→2 (2)	0.124
		10°	83.3	259.8	0.321	1 (8)→3 (8)→2 (2)	0.124
		20°	89.1	276.1	0.323	1 (8)→3 (8)→2 (1)	0.114
		30°	96.0	281.9	0.341	1 (8)→3 (8)→2 (1)	0.114
Middle season	0.2	−10°	88.8	280.6	0.316	1 (8)→3 (8)→2 (2)	0.124
		0°	90.2	286.3	0.315	1 (8)→3 (8)→2 (2)	0.124
		10°	92.9	293.5	0.316	1 (8)→3 (8)→2 (1)	0.114
		20°	93.8	296.0	0.317	1 (8)→3 (8)→2 (1)	0.114
		30°	98.0	299.9	0.327	1 (8)→3 (8)	0.102
Winter	0.1	−10°	177.2	625.55	0.283	1 (8)→3 (2)	0.069
		0°	177.6	640.24	0.277	1 (8)→3 (2)	0.069
		10°	182.4	656.49	0.278	1 (8)	0.012
		20°	189.2	677.52	0.279	1 (8)	0.012
		30°	194.3	672.78	0.289	1 (8)	0.012
					Total electricity consumption (kWh):		0.228