Effect of daylighting on energy consumption and daylight quality in an existing elementary school

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Title: Effect of daylighting on energy consumption and daylight quality in an existing elementary school
Author: Atre, Umesh Vinayak
Abstract: This research investigates the effects of daylighting in an existing elementary school in College Station , Texas . The conclusions are generalizable to similar school designs in hot and humid climates . This study focuses on the trends observed in the building ? ?s heating , cooling , and lighting energy consumption due to daylighting , and the overall effect on total energy consumption . Skylights with 1 % to 10 % glazing surface to floor area and clerestories from 2 ft to 8 ft glazing height were analyzed to formulate balanced daylighting designs that could provide for decreased electricity and gas energy consumption and increased daylight illuminance levels and energy cost savings . Classroom and Library areas inside the case study school building were analyzed using walk -throughs and daylight factor measurements to understand existing lighting conditions and the potential for daylighting . Physical scale models of the study spaces with and without daylighting alternatives were built for daylight factor and daylight penetration analysis . Computer simulation models were created for the base case and all proposed daylighting designs for building energy performance evaluation using the DOE -2 building energy simulation program . Daylight factors from the actual spaces , physical model measurements , and computer simulation outputs were studied for trendsin interior daylight illuminance levels . Annual energy consumption analyses were performed using DOE -2 and involved heating , cooling , and electrical energy use comparisons of all proposed designs with the base case . One design each from the skylight and clerestory cases , and an overall design based upon the performance criteria are proposed for the existing school building . The building energy analyses suggested that a considerable reduction in artificial lighting and total electricity use could be achieved through proper sizing of skylights and clerestories . Heating energy use stayed almost constant in all cases . Considering all different trends in energy use , all the proposed cases perform better than the base case in terms of total energy savings . The spaces analyzed constituted 15 % of total school area , and projected savings would be much higher if daylighting could be applied to the entire school building .
URI: http : / /hdl .handle .net /1969 .1 /2293
Date: 2005-08-29

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Effect of daylighting on energy consumption and daylight quality in an existing elementary school. Available electronically from http : / /hdl .handle .net /1969 .1 /2293 .

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