Public Lighting Research Articles

Evaluation study of solar powered public street lighting as battery charging at Islamic Center based on PSIM

Electrical energy is essential for the growth and advancement of technological knowledge that continues to increase. Solar cells are devices that convert solar energy through photovoltaic devices. Solar cell public street lighting (PJUBS) uses unlimited and free solar energy, is a feasible and cheap alternative to providing electric lighting. The Islamic center mosque is one of the places of worship for the majority of Muslims in the city of Lhokseumawe using public street lighting to support public security and safety. Installation of lamps for lighting is installed at several points, namely right, left or in the middle of the road, as needed, including flyovers, underpasses, and bridges. Public street lighting that is efficient and environmentally friendly is in accordance with SNI 7391: 2008. In this study, the lamps used in this evaluation study are solar types with a power of 50 Watts. The calculation results show that the illumination produced at the end of the road when using a 50 Watt solar LED lamp is 0.29 lux so that this does not comply with the provisions of BSN SNI 7391: 2008. This condition is influenced by several factors, namely surface temperature, shadows, inclination angle, light intensity, irradiation, and the condition of the panel surface in order to maximize the conversion value of sunlight into electrical energy

Comparative Study of Photovoltaic Thermal Performance with Water and Aloe Vera Heat Extracting Fluids

Crystalline solar panels are widely used in households and for public road lighting. Mono-crystalline panels are well-known for their higher efficiency and long service life. However, their efficiency decreases as the module temperature increases under consistent solar radiation conditions. To enhance module power generation and efficiency, effective temperature reduction techniques are necessary. This study investigates the use of water and aloe vera fluid as cooling agents for a mono-crystalline photovoltaic thermal (PVT) system. The system was designed with a circulating mass flow rate of 0.016 kg/s or 1 LPM (liter per minute) and tested under the climate conditions of Phnom Penh city, Cambodia. The specific heat of aloe vera fluid was determined and found to be 4236 j/kg·K. The optical efficiency of PVT systems using water and aloe vera fluid was compared in this paper. The experiment results indicate that cooling with aloe vera fluid led to a 0.21% higher electrical power generation compared to water cooling, due to more effective temperature reduction and thermal heat absorption rate of aloe vera fluid is higher than water 32.41%.

Street Lighting in Brazilian Cities: From Comfort to Safety at Nighttime

Objective: The objective of this work is to carry out a qualitative literature review, with the aim of exploring the multidisciplinary nature of the topic discussed here. Bibliographic exploration was consulted in order to establish a historical narrative regarding the impact of the emergence of public lighting in Brazilian cities. It is also the intention to raise the discussion regarding the multifactors that public lighting can address in improving the lives of those who enjoy the city at night. This context, which presents itself as a fruit of human development, raises the need for work, since progress should not negatively affect the reality, health and sociability of the human species. As a secondary objective, the proposal arises to raise the collective notion of the importance of establishing administrative and technical efforts, so that Brazilian cities remain sufficiently illuminated during the night, since the technological development of lighting resources is constantly updated. Such understanding is fundamental to enhancing the role of urban settlements in the lives of the citizens who live there and have, at night, the possibility of leisure, work and sociability. As a consequence, an improvement in the safety, health and well-being of the population can be achieved. Theoretical Framework: The primary database used in the development of this study was the analysis of historical and technical data on the implementation of the public lighting system in Brazil, as well as its benefits, obtained from the bibliography of authors capable of discussing the subject. Method: The methodology adopted for this research comprises the process of integrative bibliographic review, with the objective of fostering the multidisciplinary nature of the topic regarding public lighting in Brazilian cities. Data collection was carried out through the exploration of digital academic databases. Results and Discussion: The results obtained reinforced the crucial role of public lighting for the well-being of the population. Furthermore, they revealed that the central subject explored in the research demands a broad and integrated study, given the complexity of its nature. Public lighting in Brazilian cities needs to be analyzed from the perspective of various fields of knowledge. Research Implications: The practical and theoretical implications of this research are discussed, providing insights on how the results can be applied or influence practices in the fields of electrical engineering, urban planning, statistics, architecture, public administration, and the joint work between these fields. Originality/Value: This study contributes to the literature by presenting an innovative, theoretical and integrative essay on the topic of public lighting in Brazilian cities. The work also acts as a promoter for future studies that seek to unite in a complex way the multifactors treated, and, possibly, factors external to the topic.

The cost of debt around the IPO

PurposeThe purpose of this study is to provide empirical evidence on a possible economic explanation for changes in borrowing costs of US private firms that are going public.Design/methodology/approachUsing an OLS regression with firm fixed effects and the IPO as an information releasing event that alters information asymmetries between borrowers and lenders and relying on several proxies for pre-IPO information asymmetries, I analyze the impact of the IPO on changes in borrowing costs from before to right after an IPO of firms with high pre-IPO information asymmetries.FindingsMy findings indicate that small firms, firms with high R&D, firms with negative EBITDA and firms with a single lending relationship benefit more from going public by realizing larger decreases in borrowing costs after an IPO than firms with lower pre-IPO information asymmetries. The results are consistent with changing information asymmetries caused by the IPO event playing a role in changes in borrowing costs after the IPO. Furthermore, I provide empirical evidence that a reduction in the lender’s bargaining power due to the IPO event plays an important role in explaining changes in borrowing costs around that time.Originality/valueThis study uses a hand-collected data set of loans obtained from financial statements issued by US firms at the time of their IPO. As a result, I am able to comprehensively document changes of borrowing costs of US private firms going public and shed light on one of the economic forces behind those changes.

Black women’s filicidal rage in zones of impoverishment

ABSTRACT Visual and written accounts of rage in popular media tend to associate rage with violent masculinities. 1 Filicide brings women’s rage into sharp relief. By reading South African women in relation to their ancestral peer, Sila van den Kaap and through a ‘black deformative’ analysis of media accounts and an interview of filicide in South Africa, this paper asserts that black women have ample cause for rage. Filicide brings the purportedly personal into public light and compels a response. Although the response tends to pathologise filicidal women, it calls attention to the conditions of impoverishment that black women live under. The paper suggests that filicidal women’s refusal of the conditions of mothering, may also be an enactment of a strike against gendered scripts of care. Their own subsequent suicide might simultaneously be read as an opting out and as reaching for freedom beyond the interdiction of impoverishment. The findings suggest that rage is a crucial action-oriented affect in the expression and striving for black freedoms of which women are always core protagonists.

Harnessing Solar Energy for Sustainable Urban Street Lighting

Public street lighting plays an important role in enhancing safety and comfort in urban areas. However, the use of conventional energy for public street lighting significantly contributes to greenhouse gas emissions. This research aims to study the optimization of solar energy usage in public street lighting systems to reduce urban emissions. The methods used include energy efficiency analysis, case studies of solar energy-based public street lighting implementation, and environmental impact evaluation. The results of the study show that the application of solar energy technology in public street lighting can increase energy efficiency by up to 30% and reduce CO2 emissions by 25% compared to conventional systems. In the case study of public street lighting in the city of Binjai, the reduction in carbon emissions reached 99.96%. Additionally, this study also identifies key factors affecting the success of implementation, such as technical design, initial costs, and government policy support. Therefore, optimizing solar energy-based public street lighting not only has the potential to reduce negative environmental impacts but also supports sustainable urban development.

A comprehensive survey on an IoT-based smart public street lighting system application for smart cities

The swift advancement and updating of urban lighting systems, along with the incorporation of smart and Internet of Things (IoT) infrastructure, have opened up numerous opportunities for technological progress across various facets of life. This paper offers a comprehensive overview on the development of smart public street lighting infrastructure tailored for IoT applications in smart cities. Initially, the focus lies on transitioning from conventional lighting to Light-Emitting Diodes (LEDs) technology in street lighting. Complementing this transition, the incorporation of the wireless networked sensors and controllers ensures dynamic brightness control in operational zones, envisioning substantial energy savings. Furthermore, the notion characterizing smart cities denotes incorporating modern digital infrastructures to develop innovative functionalities and connect various application, following the IoT paradigm. The key findings from the proposed study have enhanced knowledge regarding smart public street lighting application. This system integrates smart poles equipped with LEDs lamps technology, smart sensors, communication network and monitoring unit, leveraging current technological advancements in IoT applications. The implementation of IoT-based smart public street lighting systems presents several challenges, including integrating diverse sensors and actuators ensuring robust device communication, secure data management, and effective system scaling and maintenance. Despite these challenges, this system significantly advances smart city infrastructure by enhancing energy efficiency, safety, and sustainability. However, addressing their high initial costs, data privacy and security concerns, and ongoing maintenance are crucial in future studies to realize their full potential in smart cities.

Implementasi Teknologi LoRa untuk Monitoring Real-Time Lampu PJU Berbasis Solar Panel

In the digital age, public road lighting (PJU) monitoring efficiency is becoming essential for effective infrastructure management. The research developed a PJU monitoring system based on LoRa technology and an Arduino microcontroller to monitor the operating conditions of PJU solar panels in real time. The system uses the LoRa 433 MHz module for remote data communication and is equipped with a voltage sensor to monitor batteries and solar panels as well as an ACS712 current sensor to measure current consumption on LED lights. The data is displayed on an I2C 16x2 LCD screen, making monitoring easy. LoRa technology offers the advantages of broad communication range and low power consumption. The development method used is prototyping, including needs analysis, system design, implementation, testing, and maintenance. Test results show that the system works well, with sensors providing adequate accuracy and LoRa communication enabling remote data access. The system improves the efficiency and accuracy of PJU monitoring, as well as reduces time and effort in the monitoring process. Overall, the system is an effective solution for PJU management in the digital age.

Enhancing Smart City Infrastructure: An Iot-Integrated System Approach for Real-Time Urban Management

Objectives: The primary objective of this study is to evaluate the effects of new information technologies on the workability, scalability, and reliability of urban installations. This study also aims to enhance smart city infrastructure by integrating various Internet of Things (IoT) systems, particularly for real-time smart city management. Methods : A complete experimental setup was established in a controlled urban environment encompassing numerous IoT technologies, such as environmental sensors, traffic management units, and public security systems, as well as data communication units. The Tensorflow framework, along with Python, was used to perform simulations and experiments. The system design was categorised into four key levels: data reception and transmission, computation, network and data analytics, and application. The proposed systems were subsequently tested in real-world environments, including zones frequently hosting urban events, to analyse key performance indicators. Findings : The results demonstrate significant improvements in urban management through IoT initiatives, including a 25% reduction in fine particulate matter (PM2.5) and nitrogen dioxide (NO2) levels, leading to decreased respiratory hospital admissions and enhanced air quality and health benefits. Additionally, notable advancements were observed in noise control, energy efficiency, and emergency response. Specifically, the findings recorded a 10 dB decrease in nighttime noise, a 30% reduction in energy consumption for public lighting, and a 40% faster emergency response time. These outcomes highlight the broad impact of IoT on urban sustainability and safety. Novelty : This paper introduces a novel concept focused on the design perspective of IoT-connected systems to boost smart city infrastructure, with particular emphasis on the real-time management of urban environments. Keywords: Smart Cities, IoT Technologies, Urban Infrastructure, Real ­Time Urban Management, System Architecture

MOVEMENT-CONTROLLED STREET LIGHTING SYSTEM WITH MINIMAL POWER CONSUMPTION

Energy consumption in the public lighting system represents the largest part of the energy usage of a community, while the maintenance and operation of the system are a considerable expense for every city. This paper focuses on products and innovative components for street lighting, proposing a consumption-reducing solution based on an intelligent system for remote measurements and control with dimming technologies for high-intensity discharge (HID) lamps. The results indicate that considerable energy savings are achieved and the service life of the lamps is extended. A movement-controlled street light system is controlled according to the specific mode. The modes are controlled by two sensors, which are the light-dependent resistor (LDR) and the infrared (IR) sensor. This system can automatically turn on and off the lights according to traffic flow. It operates at night, and the focus is only on the one-way road at a junction. The street light will be on when there is at least one road user; otherwise, it will turn off. This design can save a great deal of energy compared to conventional street lights that keep a light throughout the night. Moreover, the maintenance cost can be reduced, and the lifespan of the system will increase. As a result, the system has been successfully designed and implemented as a model system.

Analysis of solar power public street lighting optimization with Pvsyst software in a residential complex area

Analysis of solar power public street lighting optimization with Pvsyst software in a residential complex area

Evaluation of a cost-effective photoelectric sensor for daylight harvesting in smart public lighting systems

Global warming concerns, along with international agreements and regulations, reflect a broader effort to change the public's high energy demand in recent years. Smart public lighting systems are gaining popularity due to their energy-saving capabilities, reduction in carbon dioxide emissions, and improved public comfort. However, transitioning to smart public lighting requires careful planning and multiple stages. This is not only to accommodate public behavior, revise scenarios, and test citizen acceptance but also due to the necessary infrastructure investments. Smart public lighting incorporates new technologies, often with a breakeven point that takes several years to reach. To promote the widespread adoption of smart public lighting, it is essential to produce relatively expensive components in large quantities and explore cost-effective solutions. This research focuses on investigating a cost-effective photoelectric sensor for smart public purposes. The primary originality of this study lies in identifying a cost-effective photoelectric sensor that can replace technically equivalent but more expensive sensor solutions for indoor and outdoor lighting control purposes.

Is the public lighting contribution being used to pay for lighting services? Exploratory study in municipalities in the state of Cearáará.

The State demands resources to guarantee the fulfillment of its final functions, achieved through the creation of public goods and services that allow collective needs to be met. In this context, the revenue from the Public Lighting Contribution (CIP) gains prominence and, therefore, it is relevant to identify whether the use of this tax is capable of guaranteeing its usefulness as a public policy based on the normative provisions created and structured for its control. Therefore, the objective of the article will be to evaluate the control and management of resources linked to CIP revenue with constitutional and infra-constitutional provisions. The methodology used consisted of a bibliographic and documentary review. In effect, the study is classified as descriptive, explanatory and exploratory, with qualitative analysis and multiple case study. The results showed flaws in the planning of public policy related to public lighting, transparency, management and application of resources linked to the CIP. The data from this study allows us to visualize the relevance of this Contribution and its materiality as a source of financing for public policies. In relation to the municipalities studied, there is a clear need to improve the Public Lighting policy. Regarding management implications, improvements are needed in the resource planning process and accounting records of these expenses. Finally, the implications for society, the control and management of CIP resources will favor transparency and the exercise of social control.

"Special Regime - Galapagos islands" analysis of the electricity and public lighting service: Current status

This article presents the impact of applying the electricity sector and public lighting policies in the Galapagos Islands, focused on a framework that addresses six issues: legislation, demand, financial, technologies, environmental, and international commitments. The installed power capacity in 2022 was 31.55 MW, 23.04 % from renewable sources. By 2027, the power generation is expected to be 57.62 MW with 56 % renewable sources, without a short-term plan to comply with the "Zero fossil fuels" policy. The electrical system is isolated from the continent, and some policies analyzed can serve as a reference to implement changes in similar systems.

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

Solid-state lighting technology, such as LED devices, is critical to improving energy efficiency in street lighting systems. In Ecuador, government policies have established the obligation to exclusively use LED systems starting in 2023, except in special projects. Ecuador, known for its vast biodiversity, protects its national parks, which are rich in flora, fauna and natural resources, through international institutions and agreements such as UNESCO, CBD and CITES. Although reducing electrical consumption usually measures energy efficiency, this article goes further. It considers aspects such as the correlated color temperature in the lighting design of protected areas, light pollution and the decrease in energy quality due to harmonic distortion. Measurements of the electromagnetic spectrum of the light sources were made in an area in the Galápagos National Park of Ecuador, revealing highly correlated color temperatures that can affect ecosystem cycles. In addition, the investigation detected levels of light pollution increasing the night sky brightness and a notable presence of harmonic distortion in the electrical grid. Using simulations to predict the behavior of these variables offers an efficient option to help preserve protected environments and the quality of energy supply while promoting energy savings.

Monitoring the power flow of a low voltage distribution network using public lighting infrastructure

The production of renewable energy sources can change rapidly in a short period of time, making monitoring the power quality of Low Voltage Distribution Networks (LVDNs) one of the biggest challenges for Distribution System Operators (DSOs). An LVDN can overload some equipment if it does not monitors voltage profiles, voltage unbalance and reverse apparent power flow. Therefore, we propose a monitoring system that uses the Public Lighting Infrastructure (PLI), which is fed directly by the LVDN, to monitor the LVDN. It is based on remote management relays installed in the PLI, and replaces the installation of a power quality analyzer (PQ). The system has been empirically validated and the results show that the proposed system can identify reverse apparent power flow, profiles, and voltage unbalance with an average absolute error of 0.096% compared to a professional PQ analyzer. The proposed system can be a relevant contribution to the challenge of power quality monitoring, with cost savings; for example, DSOs can use the proposed system to access real-time information in the LVDN through a low-cost data acquisition model, without the need to send a team to install a PQ analyzer in the LVDN and then obtain the data.

ANALISIS PENCAHAYAAN LAMPU PENERANGAN JALAN UMUM (LPJU) PADA JALAN TOL SEMAYANG

Several issues with public street lighting are often found and do not meet the Indonesian National Standard (SNI). Common problems include uneven spacing between streetlight poles, improper pole heights, poorly organized streetlight installations, and incorrect selection of lamp types and wattages according to the SNI standards. The lack of streetlights on busy road sections results in inefficient operation and discomfort for road users due to inadequate light intensity at the streetlight locations caused by various factors. To address these issues, solutions are needed to improve the existing situation, including energy-saving measures for public street lighting. Some necessary actions include replacing non-compliant streetlights and conducting evaluations by relevant authorities after installation works are completed. The existing condition of streetlights along the Semayang Toll Road shows an average illumination level produced by 150W SON-T lamps of 3.1 lux with light uniformity of 0.0, which does not comply with SNI 7391:2008. Simulation results using Dialux 4.13 software indicate that the average illumination level produced by Philips LED luminaires of 150W is 11 lux with a light uniformity of 0.106 lux, meeting SNI 7391:2008 requirements. Similarly, for Philips LED luminaires of 120W, the average illumination level is 11 lux with a light uniformity of 0.114 lux, thus meeting the standards. Based on the simulation results using Dialux 4.13 software, the use of 120W LED lamps for public street lighting on the Semayang Toll Road can lead to a 20% reduction in electricity consumption.

Optimizing sewage water of Perum Pesona Permata Gading with the assistance of Cu/Mg electrodes as public street lighting based on green technology electricity

Electricity in Indonesia uses fossil fuels as an energy source. If fossil fuels run out, we will lose our largest source of electrical energy. Therefore, we need a way to reduce dependence on fossil fuels by making good use of renewable energy as a source of electrical energy. One of them is Green Technology Electricity with the utilization of sewage water to convert chemical energy into electrical energy. This study aims to determine the potential of sewage water assisted by Cu/Mg electrodes as a source of street lighting, manufacturing, and testing methods, and the effect of optimizing sewage water on electrical performance as street lighting. Lack of lighting in residential areas is also a supporting factor in this research. The stages used are preparation, incubation, construction assembly, research, and strength testing. Based on research, the sewage water from Perum Pesona Permata Gading can be used as street lighting with the highest potential difference and current strength being 4.4 V and 0.55 A for each 50 mL of the sewage water.

IoT BASED SMART PUBLIC LIGHTING SYSTEM

We can observe that public lights are lit even during daytime in many areas leading to the inefficient usage and wastage of power consumption. Even though energy efficient LEDs are being used still in many places’ timer controlled or manual turning on/off mechanisms are being employed to operate the lights which proved to be ineffective in saving energy. Hence using an IoT based system including solar panel to dynamically control the intensity of the lights will not only help to minimize the power consumption but also including a fault detection capability will help in real time monitoring of the lighting infrastructure and tracking the location using web application interface thereby reduces the maintenance time for repairing. Key words: Solar Panel, IoT, fault detection, real time monitoring

Penerapan Nilai-Nilai Kebangsaan Bersumber dari Pancasila dan UUD 1945 dalam Meninjau Strategi Manajemen Sekuriti pada PT. PLN (Persero) Guna Meningkatkan Kepuasan Pemenuhan Kebutuhan Listrik untuk Menyejahterakan Masyarakat Indonesia

PLN is a state-owned company which operates in the fields of electricity generation, electricity supply, telecommunications, finance and maintenance services. In accordance with the existing electricity supply law, the Indonesian state-owned company which is given the authority to manage the electricity industry, starting from the industrial, housing, business, government office and public street lighting sectors is PT. PLN. Apart from that, PT. PLN is also obliged to improve the welfare of the Indonesian people by fulfilling electricity needs in accordance with the 5th principle of Pancasila. The method used in this research is the literature review journal method. This research is to describe the extent to which national values originating from Pancasila and the 1945 Constitution are implemented in PT's security management strategy. PLN to increase satisfaction with meeting the electricity needs of the Indonesian people. The aim of this research is to analyze the implementation of security management strategies at PT. PLN is based on national values, namely the 5th principle of Pancasila and Law Number 30 of 2009 concerning Electricity Articles 28a and 28b. PT. PLN as a state-owned business actor which is fully obliged and responsible for its design in accordance with existing laws, must ensure that the security management system implemented by this company covers security and safety aspects in its operations.