Abstract
AbstractEnergy efficiency has been viewed as the most accessible and cost‐effective form of alternative energy. While lighting occupies only a small percentage in the total electric loads in homes, technological advances in light‐emitting diodes (LEDs) are becoming more convincing in their power consumption and lumens output. This article evaluates the percentage that lighting occupied in the total load spectrum in the two main buildings at Osun State University and verifies the light level in the library reading rooms—places where adequate lighting is imperative—with recommended standards and a comparison between the output of compact fluorescent lamps (CFLs) and the LEDs. The walk‐through energy audit approach was used to evaluate the percentage of energy that lighting consumes in these buildings. This approach involved identifying and grouping all of the electrical loads with their respective power ratings in Watts. Similarly, an illumination level verification campaign was conducted with the use of a digital light meter (a sensor‐based device) connected to a personal computer to log illumination levels in real time along the library's aisles and in the reading cubicles. The same light meter was used for comparing the output of installed CFL and proposed LEDs in an office space. Results indicate that lighting fixtures consume 12.2% of the load spectrum. The lighting installations also do not conform to global illumination standards for the assessed facilities, while the output of the LEDs that were tested was still low compared to the output of the CFLs. It is therefore recommended that better LED light sources be considered for efficient energy, reduction in environmental pollution associated with power generation, reduction in the power needed to maintain a cooling effect, and cost economy.
Highlights
Energy consumption worldwide is growing as advancements in technology continue to deliver alternative and efficient systems that serve basic human needs for heating, cooling, ventilation, air conditioning, lighting, etc
The results obtained during the energy audit at the Administrative and College of SET buildings, illumination level verification at the University Library’s reading rooms and comparison of light output for the Compact Fluorescent Lamps (CFL) in use and the Light Emitting Diodes (LED) fixtures are presented
The percentage energy consumption by existing lighting fixtures was quantified through an energy audit exercise on two main buildings - the Administrative building and College of Science, Engineering and Technology building
Summary
Energy consumption worldwide is growing as advancements in technology continue to deliver alternative and efficient systems that serve basic human needs for heating, cooling, ventilation, air conditioning, lighting, etc. Study has shown that lighting fixtures account for about 19% of electricity consumption worldwide (Deswert et al, 2009). Renewable and efficient energy has been recommended in recent times as a sustainable concept for managing the dwindling resources in the energy sector, reducing ozone layer depletion and reducing the cost of energy (Froechlich et al, 2011). The motivation for an efficient lighting system is drawn from the deployment of renewable energy systems and proper metering of homes in Nigeria. There are notable innovations in the lighting technology and had grown consistently over the years, performance depends on a number of other factors
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