Modelling of the effects of luminaire installation geometries and other factors on road illumination system photometric parameters and energy efficiency

Abstract

Purpose Properly planned road illumination systems are collectively a public wealth and the commissioning of such systems may require extensive planning, simulation and testing. The purpose of this simulative work is to offer a simple approach to facilitate luminance-based road lighting calculations that can be easier to comprehend and apply to practical designing problems when compared to complex multi-objective algorithms and other convoluted simulative techniques. Design/methodology/approach Road illumination systems were photometrically simulated with a created model in a validated software platform for specified system design configurations involving high-pressure sodium (HPS) and light-emitting diode (LED) luminaires. Multiple regression analyses were conducted with the simulatively obtained data set to propound a linear model of estimating average luminance, overall uniformity of luminance and energy efficiency of lighting installations, and the simulatively obtained data set was used to explore luminaire power–road surface average luminance characteristics for common geometric design configurations involving HPS and LED luminaires, and four categories of road surfaces. Findings The six linear equations of the propounded linear model were found to be well-fitted with their corresponding observation sets. Moreover, it was found that the luminaire power–road surface average luminance characteristics were well-fitted with linear trendlines and the increment in road surface average luminance level per watt increment of luminaire power was marginally higher for LEDs. Originality/value This neoteric approach of estimating road surface luminance parameters and energy efficiency of lighting installations, and the compendia of luminaire power–road surface average luminance characteristics offer new insights that can prove to be very useful for practical purposes.

Study of LED Retrofit Lamps in HSPV Luminaires Based on Photometric Method for Road Lighting

“…Studies have shown that a lower lumen output of LED lamps is sufficient to match higher lumen values from HPSV lamps (Brons et al, 2021). Modeling techniques on comparison of HPSV and LED luminaires concluded that LEDs are marginally higher in average luminance per watt increment of luminaire power than HPSV luminaires (Bhattacharya et al, 2023). Studies on the photometric impact of replacing the original light source are limited (Abdullah et al, 2021).…”

Energy Efficiency in Public Lighting Systems Friendly to the Environment and Protected Areas

“…Recent research explores successful SSL implementation in outdoor lighting systems [21]. LED technology shows positive results [20], not only from the point of view of energy efficiency but also in terms of the improvement in the quality of illumination [4], which can be shown in parameters such as the uniformity of the illuminated surfaces [22].…”

Modelling and optimization of laser welding of Al2024 aluminium alloy

“…In the designing of indoor environments with daylight integration (for example, historical buildings and public libraries), light shelves are often installed (to redirect sunlight into the interior space) whose upper reflective surfaces are coated with highly reflective film in aluminium alloy (Balocco and Calzolari, 2008) and the daylight transmission level through a clerestory increases with the increment in the optical reflectance of the reflective surface of a light shelf (Bhattacharya et al , 2022). Moreover, it is averred that for road lighting systems, where installation layouts and pavement characteristics profoundly influence the photometric quality parameters and system energy efficiency (Bhattacharya et al , 2021; Bhattacharya et al , 2023), aluminium-coated reflectors of luminaires reduce lumen depreciation and can increase luminaire luminous efficacy (luminous flux emitted by the luminaire per Watt of consumed electric power) (Unlu, 2022). Consequently, it can be avouched that aluminium alloys do find a plethora of energy-efficient applications in different fields ranging from lighting design to production.…”