The evaluation of energy performance of atrium space with daylight-linked lighting control

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The evaluation of energy performance of atrium space with daylight-linked lighting control


Author: Chan, Ka-shing
Title: The evaluation of energy performance of atrium space with daylight-linked lighting control
Degree: M.Eng.
Year: 2006
Subject: Hong Kong Polytechnic University -- Dissertations
Atrium buildings -- China -- Hong Kong -- Lighting
Daylighting -- Evaluation
Electric lighting -- Control
Lighting, Architectural and decorative
Department: Dept. of Building Services Engineering
Pages: v, 99 leaves : ill. ; 30 cm.
Abstract: The current design trend for commercial buildings in Hong Kong is to introduce the shopping arcade at the lower floors and provide the atrium with daylight. If daylight is properly utilized, electrical lighting energy can be saved. But the atrium could admit solar radiation into the space and increase the cooling load. What would be the overall energy performance of an atrium space with daylight-linked lighting control? Could the saving on electrical lighting power compensate the additional energy expenditure on cooling? This study was carried out for three different types of atria assuming daylight-linked lighting control was employed. The energy performance of the atria was analyzed using computer simulation programs Ecotect and HTB2. The field-measurement of average daylight factor was conducted on the real atrium site to validate the simulation results. Different daylight-linked lighting controls, fenestration glazing types, as well as skylight area were investigated. The results showed that daylight availability and space cooling load of the atrium would be greatly affected by the surrounding buildings. Glazing and skylight of an atrium play a vital role on the daylight availability and air-conditioning energy consumption. Both glazing type and skylight area have great influence on the average daylight factor of the atrium. Glazing type of atrium, however, has more significant effect of cooling load control than atria skylight area. The results also indicated that atrium building of high daylight availability would consume more energy per annum. The daylight-linked lighting controls can provide an annual lighting energy saving over of 75% (compared with no lighting control). This energy saving from electrical lighting can compensate the induced energy consumption. With regard to the overall energy performance, the introduction of atrium can be energy beneficial.

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