Umudike Journal of Engineering and Technology

Michael Okpara University of Agriculture, Umudike


ILLUMINANCE QUALITY AND VISUAL SAFETY ASSESSMENT OF CLASSROOM ENVIRONMENT IN A NIGERIAN UNIVERSITY

Azodo, A. P.
Department of Mechanical Engineering, Federal University of Agriculture, P. M. B. 2240, Abeokuta, Ogun state

Onwubalili, C.
Department of Electrical and Electronic Engineering, Federal Polytechnic Oko, P. M. B 021, Anambra State

Mezue, T. C.
Department of Electrical and Electronic Engineering, Federal Polytechnic Oko, P. M. B 021, Anambra State



ABSTRACT

Lighting is an essential element in an academic environment which affects visibility and performance of visual tasks. This study assessed the illuminance quality and light distribution of the lighting systems used in thirteen classrooms in five different buildings in a Nigerian university for visual safety in handling the predisposed visual task in the classrooms under the IES standard recommendations for classroom work plane. The illuminance of the classrooms carried out on the students’ works planes was through the instrumentation of a digital luxmeter (model HS1010). In each of the classrooms assessed, nine grid measurement points were considered, across the rows and down the columns. The measurements were conducted during the day between 8:00 – 10:00 am and at night between 8:00 – 10:00 pm. Analysis of classroom illuminance data obtained gave average ranges of 60 – 1837, 71 – 1979 and 0 – 82 lux for daylight, daylight + artificial light, and nighttime artificial lighting respectively. The classroom work plane illuminance standard showed 53.8, 54.7 and 0 percent compliance level for daylight, daylight + artificial light, and nighttime artificial lighting respectively. The three categories of lighting system assessed were all above the standard illuminance uniformity ratio of 0.3 for the perception to remain acceptable but for 7/12 (53.8%) of the classrooms on artificial light. Multiple independent-sample t-tests used for comparisons of illuminance obtained for the three categories of measurement on SPSS version 16.0 software at a confidence level of p



Keywords: daylight, classrooms, lighting, illuminance, artificial light


View: 173 | Download: 2

Conference Code
IECON2019

Conference Title
ENGINEERING FOR SUSTAINABLE ECONOMIC DIVERSIFICATION, FOOD AND NATIONAL SECURITY

ISBN
978-978-53175-8-9

Date Published
Friday, September 20, 2019

Conference Date
2nd - 4th September, 2019

The contents of the articles are the sole opinion of the author(s) and not of UJET.


Open Access
Umudike Journal of Engineering and Technology makes abstracts and full texts of all articles published freely available to everyone immediately after publication thereby enabling the accessibility of research articles by the global community without hindrance through the internet.

Indexing and Abstracting
We are index in Google Scholar