arch layout 11.21.98

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38



								2800
								2800

Performance of the dynamic blind system (DB ) compared to a static horizontal blind (SB) system. Notetheuncontrolleddaylight levels of the horizontal blind of 2400 lux, which results in higher daily cooling of 21% and peak cooling loads of 13%.Daily light- ingenergyreductions were21%.Thesedata arefor a southeast-facing windowin Oakland on a clear day in August.Both roomshave thesame daylighting control system.
									0
													Hour


Performance of the dynamic blind system comparedtoa static 45� blindsystem. Here, thedaily cooling loadand peak coolingload reductions were more modest,4% and 8%, respectively, comparedtothis partly-closed blind;butdaily lighting energysavings were 46%.These two examplesshow that irre- spective of whether thestatic blind is hori- zontal or partly closed,thedynamic system wins in thereductionoftotalenergyandpeak demand.
														Hour
			Monitored Daily Lighting Electricity, Cooling Load, and Peak Cooling Load Reductions StaticSeasonNo. ofLightingNo. ofCoolingNo. ofPeakCooling BlindDaysElectricityDaysLoadDaysLoad Angle
		45�		Spring Summer Autumn Winter Spring Summer Autumn Winter Spring Summer Autumn Winter	9 8 18 4 12 14 3 4 13 11 6 5	27 52 37 19 14 22 7 1 -1 -14 11 -1	�5% �9% �12% �4% �8% �17% �2% �1% �4% �19% �10% �3%			4 8 13 0 7 12 3 0 10 11 5 0	15 6 7 28 13 22 32 17 17	�7% �6% �3% -- �16% �5% �11% -- �16% �6% �10% --			8 8 16 4 11 13 3 1 11 11 6 3	11 6 8 15 22 13 21 28 25 24 18 32	� � � �	6% 8% 5% 11%
		15�															�6% �10% �6% �0%
		0�															� � � �	8% 7% 11% 3%
	Base case static blind angle defined asdownward anglefrom horizontal, occupantview ofground. Static settings (0�and 15�)may allow direct sunlight to penetrate the room. 21