Performance of glazing systems with improved visual performance

Pao Yue-kong Library Electronic Theses Database

Performance of glazing systems with improved visual performance

 

Author: Chan, Hoi-yee Angela
Title: Performance of glazing systems with improved visual performance
Degree: M.Eng.
Year: 2007
Subject: Hong Kong Polytechnic University -- Dissertations.
Office buildings -- China -- Hong Kong -- Energy consumption.
Lighting, Architectural and decorative -- Evaluation.
Daylighting -- China -- Hong Kong.
Department: Dept. of Building Services Engineering
Pages: x, 108, v, [31] leaves : ill. (some col.) ; 30 cm.
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2231992
URI: http://theses.lib.polyu.edu.hk/handle/200/4539
Abstract: Building is a large energy consumer requiring substantial generation of electricity in order to support proper operation. In order to minimize the negative impacts to the environment due to the electricity generation, many countries adopt daylighting design as solution to improve the energy performance of buildings. Daylighting design can reduce the energy use of artificial lighting but introduces solar heat gain at the same time. Strong solar intensity would be a factor to cause glare problem to indoor environment which discourages the use of daylight by using shading to cover the window by the occupants. These comprehensive processes would alter the energy requirement in an overall aspect. This research seeks to evaluate the performance of glazing systems of an office building in Hong Kong. The investigation involves the aspects of daylighting and energy use with consideration for visual requirement. Computer simulation software "EnergyPlus" was adopted to simulate the parameters of the office building model developed to obtain data for analysis. The daylight availability, problem of glare and the impacts on the use of internal shading devices in achieving a visually comfortable daylighting design were studied. The findings reveal the performance of the four commonly used glazing types in Hong Kong office building. In terms of daylighting, the daylight illuminance on working plane is high but some glazing types can cause serious daylight glare problem during the annual daylight period. By deploying the shading to improve the problem of high daylight glare, it significantly affects the peak cooling load and annual energy consumption of building. Both of them vary depending on the quality of daylighting design and level of visual comfortable environment required to achieve. Neglecting the visual comfort of occupants in daylighting design gives rise to over-estimating the annual energy consumption of buildings. Glazing performance with improved visual criteria has been demonstrated. It is hoped that by evaluating the energy performance of fenestration design, more concrete reference and idea can be provided to architects and engineers in considering an effective daylighting design for both energy efficiency and daylight quality.

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