Abstract
In this paper, two aspects related to streetlight systems are considered. In the first part, the economic analysis of replacing existing HPS lamps with light-emitting diode (LED) and discrete LED lamps for street lighting is performed using actual data from Oman. The street lighting system inside Sultan Qaboos University is considered for the case study. The discounted payback period, which is calculated to study the practicability of implementing the system, is found to be 1.01 years, making the system financially appealing. Moreover, the estimated reduction of a carbon footprint shows that tonnes of CO2 emissions are reduced, which makes it environmentally attractive. The second part of the paper considers optimal sizing of PV/battery system for a new streetlight system with LED lamps. The life cycle cost analysis was performed and the related cost of energy generated per kWh is estimated as 0.097 $/kWh which proves the economic viability of the system to be implemented in Oman besides minimizing the CO2 emissions to zero.
Highlights
In this paper, two aspects related to streetlight systems are considered
This paper shows a detailed analysis of the characteristics of light-emitting diode (LED) lamps that make it more appealing compared with high-pressure sodium (HPS) lamps and emphasizes the importance of replacing these lamps
The luminous flux distribution is optimized, and the results prove that converting HPS lamps to LED lamps with the same total luminous flux resulted in reduced light trespass, higher illuminance, higher uniformity of traffic lines, and higher levels of vertical illuminance
Summary
The Greenhouse gases produced from fossil fuel–charged energy generation cause global warming and harm the environment. A much better alternative for energy saving ( given its superior features) is the light-emitting diode (LED) lamp, which can replace the existing HPS lamps. These lamps possess high luminous efficacy and more accurate distribution of luminous flux compared. This paper shows a detailed analysis of the characteristics of LED lamps that make it more appealing compared with HPS lamps and emphasizes the importance of replacing these lamps It considers a new street light system powered by PV/battery system, with optimised values for the number of photovoltaic (PV) panels and batteries using genetic algorithm. The second part deals with optimising the number of panels and batteries for new street light system, with Section 6 covering the models for the panels and batteries, Section 7 the objective functions and constraints, Section 8 the life cycle cost analysis followed by the conclusion
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