You're using an outdated browser. Please upgrade to a modern browser for the best experience.
Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort by:
Most Viewed Latest Alphabetical (A-Z) Alphabetical (Z-A)
Filter:
All Topic Review Biography Peer Reviewed Entry Video Entry
Topic Review Peer Reviewed
Metal-Ion Batteries
Metal-ion batteries are systems for electrochemical energy conversion and storage with only one kind of ion shuttling between the negative and the positive electrode during discharge and charge. This concept also known as rocking-chair battery has been made highly popular with the lithium-ion battery as its most popular example. The principle can also be applied with other cations both mono- and multivalent. This might have implications and advantages in terms of increased safety, lower expenses, and utilizing materials, in particular metals, not being subject to resource limitations.
  • 1.4K
  • 04 Feb 2024
Topic Review
Waste Cooking Oil Biodiesel
To reduce the emissions caused by running the compression ignition engines, waste cooking oil (WCO) biodiesel is one of the best alternative fuels locally available in all parts of the world. WCO biodiesel cuts down the emissions value by 85% due to decreased hydrocarbon, SO2, CO, and smoke emissions in the exhaust that will effectively save the environment.
  • 1.4K
  • 10 May 2021
Topic Review
Energy Situation in Informal Settlements
Informal Settlements (ISs) are a widespread phenomenon in cities in the global south. In Sub-Saharan Africa (SSA), about 56% of the urban population lives in ISs. More than half of the urban population of Sub-Saharan Africa lives in informal housing conditions. While urban areas are, in general, characterized by a high electrification rate, residents of informal settlements are still affected by energy poverty, the use of traditional energy sources and unreliable electricity supply. 
  • 1.4K
  • 04 Jul 2023
Topic Review
Nanostructures GaAs Solar Cells
At present, the world is now passing a very far different time than normal situation due to the COVID-19 pandemic crisis. The global life-style and human civilization is currently progressing with down-stream that affecting almost every sectors necessary for human civilizations except the current environmental situation. To control the COVID-19 spreading, most of the countries are following lockdown process that reduces human mobility, thus reducing the CO2 emission to the environment. Though the COVID-19 pandemic is a blessing for the present environment, however, the post-COVID world will face a massive thrust of energy and only conventional energy resources may not be enough to mitigate the energy demands. Solar power generation technology mainly the photovoltaic (PV) systems and their advancement can be the leading possibilities to minimize the gap between the power demand and generation. It is now time to think how we can improve the PV power generation in future and the post-COVID world. In this encyclopaedia communication, we report on Nano-technological approach to improve the conversion efficiency of GaAs solar cells. We have designed and optimized several types of nano-structured assemblies that can be implemented to reduce the front surface incident light reflection losses thus can assist to improve the conversion efficiency of GaAs solar cells.
  • 1.4K
  • 02 Nov 2020
Topic Review
Method for FAPR Compliance Testing
A power hardware-in-the-loop (PHIL) based method for fast active power regulation (FAPR) compliance testing of the wind turbine converter controls. The presented PHIL setup is a generic test setup for the testing of all kinds of control strategies of the grid-connected power electronic converters.
  • 1.4K
  • 27 Oct 2020
Topic Review
Agrivoltaics in Alberta Canada
As Alberta increases conventional solar power generation, land-use conflicts with agriculture increase. A solution that enables low-carbon electricity generation and continued (in some cases, increased) agricultural output is the co-locating of solar photovoltaics (PV) and agriculture: agrivoltaics.
  • 1.4K
  • 10 Jan 2023
Topic Review Peer Reviewed
Cushion Gas Consideration for Underground Hydrogen Storage
Due to the increasing world population and environmental considerations, there has been a tremendous interest in alternative energy sources. Hydrogen plays a major role as an energy carrier due to its environmentally benign nature. The combustion of hydrogen releases water vapor while it also has a vast industrial application in aerospace, pharmaceutical, and metallurgical industries. Although promising, hydrogen faces storage challenges. Underground hydrogen storage (UHS) presents a promising method of safely storing hydrogen. The selection of the appropriate cushion gas for UHS is a critical aspect of ensuring the safety, efficiency, and reliability of the storage system. Cushion gas plays a pivotal role in maintaining the necessary pressure within the storage reservoir, thereby enabling consistent injection and withdrawal rates of hydrogen. One of the key functions of the cushion gas is to act as a buffer, ensuring that the storage pressure remains within the desired range despite fluctuations in hydrogen demand or supply. This is achieved by alternately expanding and compressing the cushion gas during the injection and withdrawal cycles, thereby effectively regulating the overall pressure dynamics within the storage facility. Furthermore, the choice of cushion gas can have significant implications on the performance and long-term stability of the UHS system. Factors such as compatibility with hydrogen, cost-effectiveness, availability, and environmental impact must be carefully considered when selecting the most suitable cushion gas. The present study provides a comprehensive review of different types of cushion gases commonly used in UHS, including nitrogen, methane, and carbon dioxide. By examining the advantages, limitations, and practical considerations associated with each option, the study aims to offer valuable insights into optimizing the performance and reliability of UHS systems. Ultimately, the successful implementation of UHS hinges not only on technological innovation but also on strategic decisions regarding cushion gas selection and management. By addressing these challenges proactively, stakeholders can unlock the full potential of hydrogen as a clean and sustainable energy carrier, thereby contributing to the global transition towards a low-carbon future.
  • 1.4K
  • 15 May 2024
Topic Review
Adsorptive Biogas Purification
Siloxanes are among the most technologically troublesome trace compounds present in biogas. As a result of their combustion, hard‐to‐remove sediments are formed, blocking biogas energy processing devices and reducing the efficiency of biogas plants. This entry can help to choose the optimal technology for the adsorptive removal of volatile methylsiloxanes (VMSs) from biogas and to identify adsorbents worth further development. Both the already implemented methods of adsorptive VMSs removal from landfill and sewage gases—e.g. using activated carbon and silica gel—and the ones being under development—e.g. using polymer resins—are presented, and their advantages and drawbacks are analyzed. The methods of obtaining adsorbents and the parameters of adsorption processes are discussed, and possible ways of regenerating spent adsorbents are evaluated. Especially promising adsorbents seem to be some zeolites—which can also be used for biogas desulfurization—and adsorbents based on polymer resins, as being particularly active towards VMSs and most amenable to multiple regeneration.
  • 1.4K
  • 27 Oct 2020
Topic Review
Liquefied Natural Gas in Railways
Liquefied natural gas (LNG) can used as an alternative to diesel fuel in railway traction. At present, there is a common effort to reduce the environmental effect of energy consumption. With this objective, the transportation sector seeks to improve emissions in all its modes. In particular, the rail transport industry is analysing various alternatives for non-electrified lines. These services are mainly carried out with diesel units.
  • 1.4K
  • 26 Jul 2021
Topic Review
Underwater Compressed Gas Energy Storage
Underwater compressed air energy storage was developed from its terrestrial counterpart. It has also evolved to underwater compressed natural gas and hydrogen energy storage in recent years. Underwater compressed air energy storage (UWCGES) is a promising energy storage technology for the marine environment and subsequently of recent significant interest attention.
  • 1.4K
  • 11 Oct 2022
Topic Review
Capacity Sizing of Battery–Supercapacitor Hybrid Energy Storage System
A battery–supercapacitor hybrid energy storage system is investigated as a solution to reduce the high-power delivery stress on the battery. An optimally-sized system can further enhance the storage and cost efficiency.
  • 1.4K
  • 17 Jun 2022
Topic Review
Existing Waste-To-Energy Technologies
Energy is a critical element in human existence, and is essential to a society’s sustainable economic growth. Globally, fossil fuels have been the primary source of electrical generation. Technologies that can efficiently recover energy from waste with little to no environmental damage have been considered as alternatives for conventional fossil fuel generation. The conversion pathways utilized in waste-to-energy (MSW) technologies may be classified into two main categories: thermochemical and biochemical. The thermochemical pathway involves the conversion of MSW feedstock to energy (electricity, heat, and value-added products) under high temperatures. It is most commonly utilized for dry waste with a larger proportion of nonbiodegradable material (a low water content). Combustion (incineration), gasification, and pyrolysis are the most common technologies under thermochemical conversion of MSW. Biochemical processes are optimal for wastes with a high proportion of biodegradable organic materials and a high moisture/water content that promotes microbial activity. Anaerobic digestion (AD) and methane recovery from a controlled environment in landfills are the most common technologies under the biochemical pathway.
  • 1.4K
  • 26 Aug 2022
Topic Review
Gas-Liquid Membrane Contactors with Aqueous-Amine Solvents
Gas–liquid membrane contactor (GLMC) is a promising process intensification technology for offshore natural gas conditioning in which weight and footprint constraints impose severe limitations. Thanks to its potential for substituting conventional packed/trayed columns for acid-gas absorption and acid-gas solvent regeneration, gas-liquid membrane contactors have been investigated experimentally and theoretically, wherein aqueous-amine solvents and their blends are the most employed solvents for carbon dioxide removal from natural gas in gas-liquid membrane contactors. 
  • 1.4K
  • 19 Sep 2022
Topic Review
The Smart Grid perspective Related to Electric Vehicle
Smart grids (SG) is a concept that has been modernizing the energy sector since it allows to establish a bidirectional communication infrastructure, allowing to improve the control, efficiency, and quality of service of power systems.
  • 1.4K
  • 08 Jun 2022
Topic Review
Electroreforming of Biomass for Value-Added Products
Humanity’s overreliance on fossil fuels for chemical and energy production has resulted in uncontrollable carbon emissions that have warranted widespread concern regarding global warming. To address this issue, there is a growing body of research on renewable resources such as biomass, of which cellulose is the most abundant type. In particular, the electrochemical reforming of biomass is especially promising, as it allows greater control over valorization processes and requires milder conditions. Driven by renewable electricity, electroreforming of biomass can be green and sustainable. Moreover, green hydrogen generation can be coupled to anodic biomass electroforming, which has attracted ever-increasing attention.
  • 1.4K
  • 22 Dec 2021
Topic Review
Lattice Boltzmann Method: Nuclear Reactor
Nuclear engineering requires computationally efficient methods to simulate different components and systems of plants. The Lattice Boltzmann Method (LBM), a numerical method with a mesoscopic approach to Computational Fluid Dynamic (CFD) derived from the Boltzmann equation and the Maxwell–Boltzmann distribution, can be an adequate option.
  • 1.4K
  • 10 Aug 2021
Topic Review
Hybrid Renewable Energy Systems
According to literature, around 80% of the world’s total energy demand is supplied either through fuel-based sources such as oil, gas, and coal or through nuclear-based sources. Literature also shows that a shortage of fossil fuels is inevitable and the world will face this problem sooner or later. Moreover, the remote and rural areas that suffer from not being able to reach traditional grid power electricity need alternative sources of energy. A “hybrid-renewable-energy system” (HRES) involving different renewable resources can be used to supply sustainable power in these areas. The uncertain nature of renewable energy resources and the intelligent ability of the neural network approach to process complex time series inputs have inspired the use of ANN methods in renewable energy forecasting. 
  • 1.4K
  • 11 May 2021
Topic Review
Micro combined heat and power
       Micro Combined Heat and Power (µCHP) systems in a DG infrastructure can reduce a building’s primary energy consumption, reduce carbon footprint, and enhance resiliency. The simultaneous production of electrical and thermal energy from a single fuel source at a high overall energy efficiency can reduce primary energy consumption while lowering greenhouse gas (GHG) emissions. A comprehensive overview of various modeling approaches adopted by international researchers is presented. The key objective is to present the state-of-the-art models and approaches while identifying opportunities for further refinement to expand the capabilities of such models for versatile applications.  
  • 1.4K
  • 27 Aug 2020
Topic Review
Ionic Liquids and Lignin
This entry gives overview of the lignin separation methods from lignocellulosic biomass using various methods but the main attention has been paid on lignin separation using ionic liquids. Lignin is a natural polymer, one that has an abundant and renewable resource in biomass. Due to a tendency towards the use of biochemicals, the efficient utilization of lignin has gained wide attention. The delignification of lignocellulosic biomass makes its fractions (cellulose, hemicellulose, and lignin) susceptible to easier transformation to many different commodities like energy, chemicals, and materials that could be produced using the biorefinery concept. 
  • 1.4K
  • 10 Oct 2020
Topic Review
Biomass Resources in Jordan
The state of Jordan’s energy independence is critical, with the country relying almost entirely on imported oil and gas. Consequently, energy availability is considered to be the most significant challenge faced by Jordan’s industrial sectors. Jordan generates large amounts of animal, human, and agricultural waste each year, of which one-third is food waste. Most of Jordan’s biomass resources are dispersed throughout the country, and there is limited collection coverage. During biomass collection in Jordan, a significant amount of agricultural residue is lost, either by being burned or reused as animal food.
  • 1.4K
  • 18 Apr 2023
  • Page
  • of
  • 33
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of COVID-19
Encyclopedia of Engineering
Encyclopedia of Social Sciences
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Academic Video Service
Feedback