scholarly journals Feasibility Study of a Small Standalone Marine Power Source

2020 ◽  
Vol 16 ◽  
Keyword(s):  
Energy Production ◽  
Fossil Fuel ◽  
Sea Water ◽  
Power Source ◽  
Current Generator ◽  
Technical Feasibility ◽  
Marine Current ◽  
Marine Currents ◽  
Current Energy ◽  
Suitable Location

This paper presents a preliminary technical feasibility of using marine current as a possible source of renewable energy production in Kuwait substituting fossil fuel based energy production. Kuwait sea water depth and velocity have been studied in order to obtain the most suitable location for such system. Topographical data collected from Kuwait Institute for Scientific Research for marine currents and seabed have been used in carrying on a simulation study of the proposed system where the possible power output has been estimated. An economical study comparing the implementation of a small standalone generator and the implementation of a marine current generator for a standalone application was carried out showing the advantages of the latter. This preliminary work will help to show that marine current energy is a viable source of energy.

scholarly journals Bioenergía a partir de microalgas en México

2019 ◽  
pp. 23-34
Author(s):  
Sheila Genoveva Pérez-Bravo ◽  
Ana María Mendoza-Martínez ◽  
Maria del Refugio Castañeda-Chávez ◽  
Luciano Aguilera-Vázquez
Keyword(s):  
Energy Demand ◽  
Energy Production ◽  
Fossil Fuel ◽  
Technological Development ◽  
Raw Material ◽  
World Population ◽  
Fuel Prices ◽  
Lipid Contents ◽  
Current Energy ◽  
Short Carbon

The energy demand of the world population is increasing due to population growth and technological development. The current energy base is a generator of CO2 emissions, the most abundant and main greenhouse gas responsible for global warming, as well as pollutants, sulfur oxides and nitrogen oxides. The environmental deterioration and the increase in fossil fuel prices make it necessary to investigate less aggressive energy sources with the environment at competitive costs in the market. Biofuels are an alternative for energy production due to their origin in the short carbon cycle, their emissions are considered almost zero, including biodiesel and bioethanol. The latter can be obtained from microalgae rich in carbohydrates and lipids, easy to grow in short periods of time. The objective of this research is to summarize the findings made about the existence of useful microalgae as raw material to produce biofuels in Mexican territory. An exhaustive review of the literature was carried out, which contributed to estimate the microalgal diversity in the country and its lipid contents as well as carbohydrates, with different species of the genera Chlamydomonas, Chlorella, Scenedesmus, Desmodesmus being found mainly.

Marine current energy conversion: the dawn of a new era in electricity production

2013 ◽  
Vol 371 (1985) ◽  
pp. 20120500 ◽  
Author(s):  
AbuBakr S. Bahaj
Keyword(s):  
Energy Conversion ◽  
Resource Assessment ◽  
Electricity Production ◽  
Planetary Motion ◽  
The Status ◽  
Marine Current ◽  
Marine Currents ◽  
Wind Energy Development ◽  
Current Energy ◽  
Flow Velocities

Marine currents can carry large amounts of energy, largely driven by the tides, which are a consequence of the gravitational effects of the planetary motion of the Earth, the Moon and the Sun. Augmented flow velocities can be found where the underwater topography (bathymetry) in straits between islands and the mainland or in shallows around headlands plays a major role in enhancing the flow velocities, resulting in appreciable kinetic energy. At some of these sites where practical flows are more than 1 m s −1 , marine current energy conversion is considered to be economically viable. This study describes the salient issues related to the exploitation of marine currents for electricity production, resource assessment, the conversion technologies and the status of leading projects in the field. This study also summarizes important issues related to site development and some of the approaches currently being undertaken to inform device and array development. This study concludes that, given the highlighted commitments to establish favourable regulatory and incentive regimes as well as the aspiration for energy independence and combating climate change, the progress to multi-megawatt arrays will be much faster than that achieved for wind energy development.

Design of a Ducted Cross Flow Turbine for Fiji

2015 ◽  
Vol 772 ◽  
pp. 561-565
Author(s):  
Jai Nendran Goundar ◽  
Niranjwan Chettiar ◽  
Sumesh Narayan ◽  
Ashneel Deo ◽  
Deepak Prasad
Keyword(s):  
Energy Source ◽  
Alternative Energy ◽  
Fossil Fuel ◽  
Fluid Dynamic ◽  
Cross Flow ◽  
Maximum Efficiency ◽  
Maintenance Cost ◽  
Ansys Cfx ◽  
Marine Current ◽  
Current Energy

Marine current energy is clean and reliable energy source. It can be alternative energy source to produce electricity if tapped with a suitable marine current energy converter. Pacific Island countries (PIC) like Fiji can reduce the amount of Fossil fuel used. However for most energy converters designed perform well at marine current velocities above 2m/s and it needs to be installed at depths of 20 – 40m also installation and the maintenance cost of such devise will be quite high if it needs to be installed in Fiji. Therefore a ducted cross flow turbine was designed, which can give desired output at minimum installation and maintenance cost. A dusted cross flow turbine has been design taking into account for its operating condition. The turbine was modelled and analyzed in commercial; Computational Fluid dynamic (CFD) code ANSYS-CFX. The code was first validated and with experiment results and finally performance analysis of full scale turbine was carried out. The designed turbine can have maximum efficiency of 56% producing rated power of 21kW; it produces 0.77kW at cut in speed of 0.65m/s.

scholarly journals Analysis of Stand-Alone Photovoltaic—Marine Current Hybrid System and the Influence on Daily and Seasonal Energy Storage

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 468
Author(s):  
Jorge Olmedo-González ◽  
Guadalupe Ramos-Sánchez ◽  
Erika Paola Garduño-Ruiz ◽  
Rosa de Guadalupe González-Huerta
Keyword(s):  
Energy Storage ◽  
Hybrid Systems ◽  
Hybrid System ◽  
Storage Systems ◽  
Storage System ◽  
Energy Storage System ◽  
Daily Energy ◽  
Marine Current ◽  
Marine Currents ◽  
Current Energy

Stand-alone systems in remote regions require the utilization of renewable resources; however, their natural intermittence requires the implementation of energy-storage systems that allow a continuous power supply. More than one renewable source is usually available at the same site. Thus, the choice of a hybrid system seems viable. It is relevant to study hybrid systems as they could reduce energy storage; however, sizing the hybrid system might have several implications, not only for the available daily energy, but also for the required daily energy storage and surplus seasonal energy. In this work, we present a case study of a stand-alone, conventional household powered by photovoltaic and marine-current-energy systems in Cozumel, Mexico. The analysis of different hybridization degrees serves as a guidance tool to decide whether hybrid systems are required for a specific situation; in contrast to previous approaches, where ideal consumption and generation profiles have been utilized, yearlong profiles were utilized here. The renewable potential data were obtained on site at an hourly resolution; requirements such as size of and cycles in the daily and seasonal energy storage were analyzed according to the degree of participation or hybridization of the proposed renewable systems through an algorithm that evaluates power generation and daily consumption throughout the year. A further analysis indicated that marine-current-energy implementation reduces the size of the daily energy-storage system by 79% in comparison to the use of only a photovoltaic system due to the similarity between the energy-demand profile and the marine-current-energy production profile. The results indicate that a greater participation of marine currents can help decrease daily storage while increasing seasonal storage by 16% compared to using only solar energy. On the other hand, hybridization enabled a reduction in the number of daily charge and discharge cycles at 0.2 hybridization degrees. It also allowed us to reduce the seasonal energy storage by 38% at 0.6 hybridization degrees with respect to only using energy from marine currents. Afterwards, energy-storage technologies were evaluated using the TOPSIS Multi-Criteria Decision Analysis to validate the best-suited technology for the energy-storage system. The evaluation considered the characteristics of the technology and the periods of energy storage. In this work, hybrid storage systems were mandatory since, for daily storage, lithium-ion batteries are better suited, while for seasonal storage, hydrogen-producing systems are more suitable to manage the amount of energy and the storage duration due to the high seasonal renewable-energy variations.

scholarly journals Marine current energy assessment and the hydrodynamic design of the hydrokinetic turbine for the Moroccan Mediterranean Coast

2021 ◽  
pp. 014459872098662
Author(s):  
Salma Hazim ◽  
Abdelouahab Salih ◽  
Mourad Taha Janan ◽  
Ahmed El Ouatouati ◽  
Abdellatif Ghennioui
Keyword(s):  
Electrical Energy ◽  
Mediterranean Coast ◽  
Electricity Production ◽  
Blade Element Theory ◽  
Hydrokinetic Turbine ◽  
Marine Current ◽  
Current Resource ◽  
Suitable Area ◽  
The Impact ◽  
Current Energy

Generating electricity through renewable energies is growing increasingly to reduce the huge demand on electricity and the impact of fossil energies on the environment, the most common sources forms used are: the wind, the sun, the photovoltaic and the thermal, without forgetting hydropower by the bays of dams. Fortunately, 70% of our planet is covered by the seas and oceans, this area constitutes a huge potential for electricity production to be exploited. The scientific advances of recent years allow a better exploitation of these resources especially the marine current due to its reliability and predictability. The marine current energy is extracted using a hydrokinetic turbine (HKT) which transform the kinetic energy of water into an electrical energy. The exploitation of this resource needs in the first step the assessment of marine currents in the study area for implementing the HKT, and the second step is designing an adequate technology. The main goal of this study is the assessment of the marine current resource on the Moroccan Mediterranean coast to evaluate the suitable area to implement the HKT, and to determine the marine current speed intensities at different depths. As well as, to estimate an average potential existing in the site. Moreover, we will conduct a study based on the results of the assessment that was made to design a horizontal axis marine current turbine (HAMCT). Two hydrofoil profile were considered to design a HAMCT using the Blade Element Theory (BEM) and calculating their performances adapted to the site conditions Naca4415 and s8052. In addition, a comparison was made between this two HAMCT hydrofoil profile for deciding the best one for implementing in the studied area.

scholarly journals Status of Marine Current Energy Conversion in China

2021 ◽  
Vol 4 (1) ◽  
pp. 11-23
Author(s):  
Hongwei Liu ◽  
AbuBakr S. Bahaj
Keyword(s):  
Energy Conversion ◽  
Policy Framework ◽  
Chinese Government ◽  
Renewable Energy Systems ◽  
Technology Deployment ◽  
Prototype Development ◽  
Marine Energy ◽  
The Status ◽  
Marine Current ◽  
Current Energy

Marine current energy conversion (MCEC) technologies are promising renewable energy systems with some full scale and semi-commercial turbines constructed and deployed in several countries around the world. In this work, we present the status of marine current energy and systems in China and policies geared to support these. Over the past ten years the Chinese government has provided a policy framework and financial supports for the development of MCEC technologies of various design philosophies which has resulted in significant technology deployment at sea. A review of these technologies – which have turbine capacities in the range 20 kW to 650 kW, mostly tested at sea – is presented in the paper. In addition, the paper also discusses Chinese plans for marine energy test sites at sea to support prototype development and testing and concludes with a view of future prospects for the marine energy technology deployment in China.

scholarly journals Mity dotyczące energii odnawialnej w opinii młodzieży województwa podkarpackiego

2020 ◽  
Vol 18 (3) ◽  
pp. 33-47
Author(s):  
Marian Woźniak ◽  
Keyword(s):  
Quality Of Life ◽  
Renewable Energy ◽  
Energy Policy ◽  
Fossil Fuel ◽  
Economic Effect ◽  
Energy Sector ◽  
Hard Coal ◽  
The European Union ◽  
Current Energy

Electricity is one of the factors shaping the quality of life of society. The Polish energy sector is to a large extent identified with fossil fuel used in conventional energy, based mainly on hard coal, which is not fully in line with the current energy policy of the European Union. Therefore, today it is necessary to use renewable energy more efficiently, which, in addition to the clearly indicated economic effect, also accentuates environmental effects. The purpose of the work is to show the opinions of young people aged 15–24 in terms of their awareness of the interpretation of myths about renewable energy, which is a key problem in the development of the modern energy sector, and to indicate the directions of development of the energy policy in Poland.

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