Smart Regulation and Efficiency Energy System for Street Lighting with LoRa LPWAN

2021 ◽  
pp. 102912
Author(s):  
F. Sanchez-Sutil ◽  
A. Cano-Ortega
Keyword(s):  
Energy System ◽  
Street Lighting ◽  
Smart Regulation

Smart Cities and Smart Regulation

2018 ◽  
Author(s):  
Anita Rønne
Keyword(s):  
Climate Change ◽  
Urban Areas ◽  
Fossil Fuels ◽  
System Analysis ◽  
New Technologies ◽  
Smart Cities ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Political Agenda ◽  
Smart Regulation

Increasing focus on sustainable societies and ‘smart cities’ due to emphasis on mitigation of climate change is simultaneous with ‘smart regulation’ reaching the forefront of the political agenda. Consequently, the energy sector and its regulation are undergoing significant innovation and change. Energy innovations include transition from fossil fuels to more renewable energy sources and application of new computer technology, interactively matching production with consumer demand. Smart cities are growing and projects are being initiated for development of urban areas and energy systems. Analysis from ‘Smart Cities Accelerator’, developed under the EU Interreg funding programme that includes Climate-KIC,——provides background for the focus on a smart energy system. Analysis ensures the energy supply systems support the integration of renewables with the need for new technologies and investments. ‘Smart’ is trendy, but when becoming ‘smart’ leads to motivation that is an important step towards mitigating climate change.

scholarly journals Modeling of a CO2-Based Integrated Refrigeration System for Supermarkets

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6926
Author(s):  
Ángel Á. Pardiñas ◽  
Michael Jokiel ◽  
Christian Schlemminger ◽  
Håkon Selvnes ◽  
Armin Hafner
Keyword(s):  
High Pressure ◽  
Measurement Data ◽  
Cost Savings ◽  
Energy System ◽  
Refrigeration System ◽  
System Configuration ◽  
Valve System ◽  
Smart Regulation ◽  
Integrated Energy System ◽  
Natural Refrigerant

An integrated energy system that consists of a centralized refrigeration unit can deliver the entire HVAC&R (heating, ventilation, air conditioning, and refrigeration) demand for a supermarket. CO2 (R744) is a natural refrigerant that is becoming increasingly popular for these centralized units due to significant energy and cost savings, while also being sustainable, safe, and non-toxic. This study focuses on the fully integrated CO2 refrigeration system configuration for a supermarket in Porto de Mos, Portugal, which was equipped and fully monitored through the EU-funded project MultiPACK. A dynamic system model was developed in Modelica and validated against measurement data from the site recorded for one week. The model is used to provide additional ejector performance data supporting the obtained measurement data and to evaluate the system configuration at equivalent boundary conditions. The simulation results show that the installation of a vapor ejector (high-pressure lift) is sufficient to improve the efficiency of the unit compared to an ejector-less (high-pressure valve) system. However, more notable enhancements are achieved by including additional flooded evaporation with liquid ejectors and smart regulation of the receiver pressure, adding up to a global efficiency increase of 15% if compared to the high-pressure valve system during the validation week.

scholarly journals Environmental and Economic Impacts of Lighting Highways Using Photo-Voltaic Panels

2021 ◽  
Vol 2 (2) ◽  
Author(s):  
Mohamed Saber Shahat ◽  
Soliman M. Sharaf ◽  
Mohamed Edrees ◽  
Mohamed Abdelhalim
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Power Saving ◽  
Life Time ◽  
Energy System ◽  
Economic Feasibility ◽  
Street Lighting ◽  
Environmental Feasibility

The renewable energy sources in power generation globally increases rapidly over time. This paper presents a novel technique of street lighting by using off-grid solar energy system. The electrical power is generated from solar panels at the day time and stored in batteries and consequently, discharged in the street lamps at night. The charging, discharging and their rates rate are controlled obviously by charger controller. Highway road is selected in this study. Several aspects are optimized in this study. Number of columns, columns types, lamp arms, columns distance and the backup storage limits are studied. The sizing of the individual solar stations in terms of economic and environmental feasibility are optimized. New power saving technique will apply advanced methods to reduce the storage capacity and power consumption to enhance the economic feasibility of the suggested system. In addition, the life time of storage batteries is increased. The most appropriate technique is selected in terms of economic and environmental feasibility by comparing all the different cases suggested in this study. Finally, the best case for solar street lighting project is compared to the normal or conventional system to show the economic and environmental potentiality of using renewable energy, especially solar energy. Experimental solar energy street lighting system with power saving is implemented in this study.

Street lighting and its future

1961 ◽  
Vol 7 (74) ◽  
pp. 100-103
Author(s):  
W.R. Stevens ◽  
H.M. Ferguson
Keyword(s):  
Street Lighting

Street lighting

1955 ◽  
Vol 26 (102) ◽  
pp. 107
Author(s):  
A.A. Marshall
Keyword(s):  
Street Lighting

Optimal approaches to manage power system decarbonation

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1447-1452
Author(s):  
Vincent Mazauric ◽  
Ariane Millot ◽  
Claude Le Pape-Gardeux ◽  
Nadia Maïzi
Keyword(s):  
Free Energy ◽  
Linear Programming ◽  
Phase Transitions ◽  
Power System ◽  
Energy System ◽  
Energy Sources ◽  
Low Carbon ◽  
Faraday’S Law ◽  
Optimal Description ◽  
Low Carbon Technologies

To overcome the negative environemental impact of the actual power system, an optimal description of quasi-static electromagnetics relying on a reversible interpretation of the Faraday’s law is given. Due to the overabundance of carbon-free energy sources, this description makes it possible to consider an evolution towards an energy system favoring low-carbon technologies. The management for changing is then explored through a simplified linear-programming problem and an analogy with phase transitions in physics is drawn.

Design of Solar-Powered LED Road Lighting System

2019 ◽  
pp. 75-85
Author(s):  
Canan Perdahci ◽  
Hamdi Ozkan
Keyword(s):  
High Pressure ◽  
Renewable Energy Sources ◽  
Junction Temperature ◽  
Mercury Vapour ◽  
Light Sources ◽  
Street Lighting ◽  
Led Light ◽  
Road Lighting ◽  
Lighting Systems ◽  
High Pressure Sodium Lamp

Turkey is rich in terms of renewable energy sources and, therefore, is now encouraging the use of sustainable clean lighting systems in road applications. High pressure sodium lamp is the most widely used type in main roads, but other types of lamps such as mercury vapour lamps or metal halide lamps can be utilized for street lighting. Since it enables energy and money saving, LED light technology has replaced high pressure sodium lamps nowadays. Once solar power system (PV) is integrated with LED lamp for street lighting, the amount of saving and local impact might be enriched. LEDs used as light sources in road lighting luminaires with rising lumen values, decreasing junction temperature, higher colour rendering efficiency, longer lifetime have become more efficient than many light sources with the latest developments. Since the structure of the luminaires in which the LED light sources are used differs from that of the conventional light sources, the optical, thermal and electrical design of the LED luminaires must be considered differently. Thus, this study concentrates upon design considerations and the operating principle of solarpowered LED road lighting luminaire in details. Also, a simple solar panel system was designed and the economical values obtained at the end of 20 years were compared when using the ongrid system and the off-grid system.

Evaluation of net shortwave radiation over China with a regional climate model

2020 ◽  
Vol 80 (2) ◽  
pp. 147-163
Author(s):  
X Liu ◽  
Y Kang ◽  
Q Liu ◽  
Z Guo ◽  
Y Chen ◽  
...  
Keyword(s):  
Regional Climate Model ◽  
Climate Model ◽  
Regional Climate ◽  
Radiant Energy ◽  
Energy System ◽  
Radiation Budget ◽  
Shortwave Radiation ◽  
Monsoon Region ◽  
Clear Sky ◽  
Sky Conditions

The regional climate model RegCM version 4.6, developed by the European Centre for Medium-Range Weather Forecasts Reanalysis, was used to simulate the radiation budget over China. Clouds and the Earth’s Radiant Energy System (CERES) satellite data were utilized to evaluate the simulation results based on 4 radiative components: net shortwave (NSW) radiation at the surface of the earth and top of the atmosphere (TOA) under all-sky and clear-sky conditions. The performance of the model for low-value areas of NSW was superior to that for high-value areas. NSW at the surface and TOA under all-sky conditions was significantly underestimated; the spatial distribution of the bias was negative in the north and positive in the south, bounded by 25°N for the annual and seasonal averaged difference maps. Compared with the all-sky condition, the simulation effect under clear-sky conditions was significantly better, which indicates that the cloud fraction is the key factor affecting the accuracy of the simulation. In particular, the bias of the TOA NSW under the clear-sky condition was <±10 W m-2 in the eastern areas. The performance of the model was better over the eastern monsoon region in winter and autumn for surface NSW under clear-sky conditions, which may be related to different levels of air pollution during each season. Among the 3 areas, the regional average biases overall were largest (negative) over the Qinghai-Tibet alpine region and smallest over the eastern monsoon region.

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