scholarly journals Polarization Models of Radiation in a Solar Energy Concentrator System

2021 ◽  
Vol 43 (5) ◽  
pp. 93-107
Author(s):  
Y.S. Chernozomov ◽  
Keyword(s):  
Solar Radiation ◽  
Renewable Energy Sources ◽  
Radiation Energy ◽  
Optical Systems ◽  
Energy Sources ◽  
Hydrogen Fuel ◽  
Energy Component ◽  
Production Of Hydrogen ◽  
Solar Energy Concentrator ◽  
Polarization Models

The possibility of using renewable energy sources (RES) for the production of hydrogen fuel, in particular solar radiation energy, without using the stage of generating electricity is considered. A mathematical model of a reflector with anisotropy of electrodynamic properties is presented. According to the analysis, using the described model, conclusions were drawn about the possibility of using this effect to ensure the transmission capacity of the energy component of solar radiation with partial or complete retention of polarization. Based on the data obtained, variants of collimating optical systems of energy concentrators are proposed that are potentially capable of realizing the photolysis process.

scholarly journals Hazard and Economical Evaluation for a Hydrogen Fuel Station

2021 ◽  
Vol 9 (2) ◽  
Author(s):  
Mohammed Fawzi ◽  
Tarek Hamad ◽  
AL-Hassan M. Azouz
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Developed Countries ◽  
Primary Objective ◽  
High Mass ◽  
Hazard Evaluation ◽  
Energy Sources ◽  
Hydrogen Fuel ◽  
Conventional Vehicle

Many developed countries around the world are currently competing to find low-cost, sustainable and clean energy sources. To replace conventional energy sources such as (oil, coal, etc.) for several reasons. mainly, because of the negative environmental impact of the Greenhouse Gas (GHG) emission problem. Also, these resources will deplete soon. As a result, seeking for a better replacement of fossil fuels either by converting to electric vehicles or by using other possible renewable energy sources with low (GHG) emissions is essential. Hydrogen is one of the primary potential future alternatives of current automotive petroleumrelated due to its high mass-energy ratio and abundance since it can be obtained from a broad spectrum of sources and by various techniques, such as anaerobic digestion from organic materials, rendering it a prospective target for safe and renewable energy. Hydrogen fuel stations are predicted to have a significant impact on the implementation of hydrogen as a fuel substitution on the worldwide fuel market, especially for heavy transportation. The primary objective of this innovative station branch is not only to promote the idea of hydrogen fuel on the vehicle fuelling industry but also to enhance the advancement of hydrogen fuel facilities while minimizing the danger to the investor. There are, though, some areas that need to be investigated with such drop-in facilities as storage and delivery mechanisms which this study covers. The key idea of such a system is to provide a safe, affordable and accessible car fuel source equivalent to conventional vehicle fuel on the industry, whether it is renewable. The primary goal of this research is to develop a secure, flexible and environmentally friendly hydrogen fueling facility, this design is regarded to be cost-efficient compared to other designs by at least 48 percent. Furthermore, this design showed encouraging signs concerning safety procedures and hazard evaluation where is ranked 6.8 on average out of 25 in the FMEA review assuring it’s safe further.

scholarly journals Life Cycle Assessment of Electric Vehicles and Hydrogen Fuel Cell Vehicles Using the GREET Model—A Comparative Study

2021 ◽  
Vol 13 (9) ◽  
pp. 4872
Author(s):  
Eugene Yin Cheung Wong ◽  
Danny Chi Kuen Ho ◽  
Stuart So ◽  
Chi-Wing Tsang ◽  
Eve Man Hin Chan
Keyword(s):  
Global Warming ◽  
Fuel Cell ◽  
Electric Vehicles ◽  
Fuel Cycle ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Fuel Cell Vehicles ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Hydrogen Fuel Cell Vehicles

Facing global warming and recent bans on the use of diesel in vehicles, there is a growing need to develop vehicles powered by renewable energy sources to mitigate greenhouse gas and pollutant emissions. Among the various forms of non-fossil energy for vehicles, hydrogen fuel is emerging as a promising way to combat global warming. To date, most studies on vehicle carbon emissions have focused on diesel and electric vehicles (EVs). Emission assessment methodologies are usually developed for fast-moving consumer goods (FMCG) which are non-durable household goods such as packaged foods, beverages, and toiletries instead of vehicle products. There is an increase in the number of articles addressing the product carbon footprint (PCF) of hydrogen fuel cell vehicles in the recent years, while relatively little research focuses on both vehicle PCF and fuel cycle. Zero-emission vehicles initiative has also brought the importance of investigating the emission throughout the fuel cycle of hydrogen fuel cell and its environmental impact. To address these gaps, this study uses the life-cycle assessment (LCA) process of GREET (greenhouse gases, regulated emissions, and energy use in transportation) to compare the PCF of an EV (Tesla Model 3) and a hydrogen fuel cell car (Toyota MIRAI). According to the GREET results, the fuel cycle contributes significantly to the PCF of both vehicles. The findings also reveal the need for greater transparency in the disclosure of relevant information on the PCF methodology adopted by vehicle manufacturers to enable comparison of their vehicles’ emissions. Future work will include examining the best practices of PCF reporting for vehicles powered by renewable energy sources as well as examining the carbon footprints of hydrogen production technologies based on different methodologies.

In-situ Formation of Grain Boundaries on Supported Hybrid to Boost Water Oxidation Activity of Iridium Oxide

Nanoscale ◽  
2021 ◽  
Author(s):  
Wei Sun ◽  
Zhiqiang Wang ◽  
Xinlong Tian ◽  
Hui Deng ◽  
Jianjun Liao ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Water Oxidation ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Hydrogen Fuel ◽  
Oxidation Activity ◽  
In Situ Formation ◽  
Electrochemical Water Splitting ◽  
Kinetics Of

Coupling electrochemical water splitting with renewable energy sources shows great potential to produce hydrogen fuel. The sluggish kinetics of oxygen evolution reaction (OER) resulting from the complicated reaction mechanism and...

scholarly journals The establishment and significance of district/regional roof cadastres in the utilization of solar energy

2014 ◽  
Vol 6 (1) ◽  
pp. 45-51
Author(s):  
Lajos Szalontai
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Renewable Energy Sources ◽  
Local Level ◽  
Regional Level ◽  
Energy Sources

Abstract After its establishment, the roof cadastre - solar cadastre I wish to introduce in this article will form a database, with the help of which we will be able to analyse solar radiation factors on the local level (street, house), and a map display will also be available. Through the implementation of the appropriate methods, we can establish roof/solar cadastres on the settlement/district/regional level and these can help to increase the rate of utilization of renewable energy sources.

scholarly journals Water Electrolysis for the Production of Hydrogen to Be Employed in the Ironmaking and Steelmaking Industry

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1816
Author(s):  
Pasquale Daniele Cavaliere ◽  
Angelo Perrone ◽  
Alessio Silvello
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
High Temperature ◽  
Low Temperature ◽  
Steel Industry ◽  
Renewable Energy Sources ◽  
Water Electrolysis ◽  
Energy Sources ◽  
Production Of Hydrogen ◽  
Basic Production

The way to decarbonization will be characterized by the huge production of hydrogen through sustainable routes. Thus, the basic production way is water electrolysis sustained by renewable energy sources allowing for obtaining “green hydrogen”. The present paper reviews the main available technologies for the water electrolysis finalized to the hydrogen production. We describe the fundamental of water electrolysis and the problems related to purification and/or desalinization of water before electrolysis. As a matter of fact, we describe the energy efficiency issues with particular attention to the potential application in the steel industry. The fundamental aspects related to the choice of high-temperature or low-temperature technologies are analyzed.

scholarly journals Evaluation of the solar conditions for the acquisitions of energy from renewable sources on the base of Sosnowiec city (Poland)

2014 ◽  
Vol 3 (1) ◽  
pp. 83-90
Author(s):  
Sonia Sarapata
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Energy Security ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Security Risk ◽  
Annual Average ◽  
Radiation Data ◽  
Wide Range ◽  
Annual Total

Abstract The country’s energy security risk, as well as a desire to protect the environment from the pollution and degradation which are the results of conventional fuels acquisition - these was a motivation for intensive researches on the use of renewable energy sources in eco - innovative installations. Solar radiation is one of the self - renewable energy sources which can be used both as a source of electricity and heat. The area of research is Sosnowiec city located in the south of Poland in the eastern part of Silesia voivodeship. The solar radiation data covering the years 2003 to 2013 was used. The intra - annual variability of daily averaged solar radiation hesitated in a wide range from 0.6 kWh/m2 (December) to 5.2 kWh/m2 (June). Day duration varies on average from 10 hours in January, November and December to 17 hours in May, June and July. Day occupies 56% of the 8767 hours in year. On average the largest amount of energy reached the analyzed area in July: 157 kWh/m2 (15% of the annual average), while the smallest in December: 18 kWh/m2 (less than 2% of the annual average). The 75% of the average annual total of energy falls on the period from 1st March to 31th August (spring - summer). The range of the annual solar radiation was determined by the minimum of 980 kWh/m2 and the maximum of 1094 kWh/m2. In Sosnowiec the average annual irradiation total on the horizontal surface amounts to 1052 kWh/m2 (2003 - 2013)

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