Study of lighting performance of artificial lighting installations of classrooms in the Hong Kong Polytechnic University

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Study of lighting performance of artificial lighting installations of classrooms in the Hong Kong Polytechnic University

 

Author: Poon, Shing
Title: Study of lighting performance of artificial lighting installations of classrooms in the Hong Kong Polytechnic University
Degree: M.Eng.
Year: 2016
Subject: School buildings -- Lighting.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Building Services Engineering
Pages: xiii, 117, 36 pages : color illustrations
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2917128
URI: http://theses.lib.polyu.edu.hk/handle/200/8614
Abstract: Lighting Quality of classroom lighting installations has been concerned for its correlation with the learning outcome and students' health issue. The effect of different lighting quality on the students' performance has been investigated by scholars over the globe. However, there are yet to have a comprehensive study in quantifying the relationship between the lighting quality which is mainly the performance, satisfaction and comfort level under the lighting environment, and the lighting parameters of the classrooms such as lighting level and discomfort glare level. The objective of this research is to focus on having a better insight on the relationship between the lighting quantities and the lighting quality by correlating and quantifying them through statistical analysis. This study is carried out under the hypothesis that there are relations between the quantitative and qualitative data of the classrooms. The lighting quantitative and qualitative data from 8 selected classrooms with different lighting environment features in the Hong Kong Polytechnic University were collected and examined by means of on-site measurement, computer simulation and questionnaire survey. Illuminance level, uniformity, unified glare rating and cylindrical illuminance are the key lighting parameters for this study. In the investigation, questionnaire survey and photometric measurements were carried out in the selected classrooms. The questionnaire survey involved 241 samples in 8 selected classrooms in the campus. The results of photometric measurements revealed that classrooms in old campus building core are below the standard requirement of SLL lighting code. The results also indicated that glare problem does not exist in the selected classrooms and poor uniformity is the main problem in the classrooms which affect the students' expectation of their performance and comfort level in the classroom. The checking of code requirement can only justify the fulfillment of the acceptable minimum level and a code-compliance lighting environment does not necessarily imply a good lighting quality. Students' ratings of the lighting condition are not the highest even lighting parameters such as illuminance and uniformity meet the requirement. It is found that students are generally not sensitive to the small difference in lighting parameters but percept the big difference in them. This can be ascribed to the ability of human eye to adapt the lighting environment. To explain and predict the students' perception of lighting environment, a statistical analysis is carried out to find out the relationship between the data from the photometric measurement and questionnaire survey. By correlating them and carrying out the multiple regression, a lighting quality assessment model which consist of three equations on the prediction of students' perception on comfort level, performance level and whiteboard lighting conditions are established for assessing the lighting quality of the classrooms.

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