scholarly journals Potential Study of Tidal Stream Turbine Farm at Toyapakeh Strait, Bali

2021 ◽  
Vol 26 (3) ◽  
pp. 155-162
Author(s):  
Alamsyah Kurniawan ◽  
Prayla Putri Annani Barli ◽  
Munawir Bintang Pratama ◽  
Ahmad Fitriadhy
Keyword(s):  
Energy Cost ◽  
Energy Demand ◽  
Financial Analysis ◽  
Clean Energy ◽  
Energy Potential ◽  
Long Period ◽  
Cost Of Energy ◽  
Tidal Stream ◽  
Tidal Stream Energy ◽  
Tidal Stream Turbine

In 2015, Bali Province is mandated by ESDM ministry to become the National Region of Clean Energy, promoting efforts to explore new source of electricity namely tidal stream energy. Previous works have demonstrated that Toyapakeh Strait contains a promising tidal stream resource, with a high stream in a long period. In this study, hydrodynamic modelling and power production analysis is conducted to evaluate this potential with an aim to meet energy demand of Tiga Nusa Cluster Islands. Twenty-one Gen5 KHPS turbines are employed in this study, at an optimized location, 8.72°S, 115.44°E, which contains the highest energy potential. Financial analysis, with 25-year return period of investment and 3.60% interest rate, resulting levelized cost of energy (LCOE) of Rp 6,100.kWh-1. This value is higher than the national and regional selling nominal, in other word the energy cost of tidal stream turbine is relatively high in this location. Nearly 46% of energy cost is spent for turbine fabrication, and from the sensitivity analysis, cutting half the turbine costs may reduce the price by Rp 1,400.kWh-1 while increasing the amount of installed turbine is less significant. Despite of the high prices, the study shows that Toyapakeh Strait holds a promising resource of tidal stream energy.

scholarly journals A HOLISTIC METHOD TO SELECT TIDAL STREAM ENERGY HOTSPOTS

2017 ◽  
pp. 5
Author(s):  
Angela Vazquez ◽  
Gregorio Iglesias
Keyword(s):  
Ad Hoc ◽  
Holistic Approach ◽  
Tidal Energy ◽  
Energy Development ◽  
Potential Conflict ◽  
Cost Of Energy ◽  
Tidal Turbine ◽  
Tidal Stream ◽  
Tidal Stream Energy

Potential areas for tidal stream energy development are conventionally selected on the basis of resource assessments. For all the importance of the resource, there are other elements (technological, economic, spatial, etc.) that must be taken into account in this selection. The objective of the present work is to develop a new methodology to select tidal stream hotspots accounting for all these relevant elements, and to apply it to a case study, showing in the process how the potential for tidal energy development can be fundamentally altered by technological, economic and spatial constraints. The case study is conducted in the Bristol Channel and Severn Estuary (UK), one of the regions with the largest tidal resource in the world. First, the most energetic areas are identified by means of a hydrodynamics model, calibrated and validated with field data. Second, the method calculates the energy that can be harnessed in these areas by means of a geospatial Matlab-based program designed ad hoc, and on the basis of the power curve and dimensions of a specific tidal turbine. Third, the spatial distribution of the levelised cost of energy (LCOE) is calculated, and a number of locations are selected as potential tidal sites. The fourth element in the approach is the consideration of restrictions due to overlap with other marine uses, such as shipping. As a result, potential conflict-free areas for tidal stream energy exploitation at an economical cost are identified. Thus, the case study illustrates this holistic approach to selecting tidal stream sites and the importance of elements other than the resource, which – for all its relevance – is shown to not guarantee by itself the potential for tidal stream energy development.

scholarly journals PEMODELAN ENERGI BARU TERBARUKAN (EBT) MELALUI PENDEKATAN DINAMIS UNTUK KETAHANAN ENERGI KABUPATEN SUMBAWA 2017-2027

2020 ◽  
Vol 4 (2A) ◽  
pp. 122-132
Author(s):  
Nova Aryanto ◽  
Ahmad Jaya ◽  
Chairul Hudaya
Keyword(s):  
Energy Demand ◽  
Central Government ◽  
Systems Approach ◽  
Clean Energy ◽  
Green Energy ◽  
Planning System ◽  
Demand Forecast ◽  
Energy Potential ◽  
General Plan ◽  
The Government

In an effort to increase the value of the Electrification Ratio value reaches 99.9% andUtilization of New and Renewable Energy (EBT) of up to 25% by 2025 is requiredThe General Plan for National Energy (RUEN) which is revealed to be the General DraftRegional Energy (RUED). Sumbawa as an area in West Nusa Tenggarahas the potential for EBT in the form of Solar Energy Potential, Hydro Energy, and Thermal EnergyEarth and Sea Energy require strategic policies to manage andmeet the energy security of the region. This study aims to predictEnergy needs, and mapping the potential of EBT, in order to obtain a mixenergy (energy mix) is balanced. This research was conducted using toolssoftware Long-range Energy Alternatives Planning System (LEAP) withdynamic systems approach. Data obtained from PT. PLN UP3 Sumbawa, RUPTL DataPLN NTB Region, Bapedda Kab. Sumbawa and Data from BPS Kab. Sumbawa. ResultThis research shows that the potential of EBT can be integrated in RUED formeet the energy needs of the region. Therefore, this research canproduce accurate energy demand forecast for Sumbawa Regencyin particular the use of regional green energy sources (Green Energy) to achieve thisenergy security for the great and dignified Sumbawa Regencyencouraging the formation of RUED Sumbawa Regency in line with the Indicator StrategySDGs program launched by the Government, both the Central Government andLocal Government especially the Clean Energy (Green Energy) program.

scholarly journals Densification of agro-residues for sustainable energy generation: an overview

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Segun E. Ibitoye ◽  
Tien-Chien Jen ◽  
Rasheedat M. Mahamood ◽  
Esther T. Akinlabi
Keyword(s):  
Solid Fuel ◽  
Energy Demand ◽  
Sustainable Energy ◽  
Clean Energy ◽  
Energy Generation ◽  
Energy Potential ◽  
Environmental Threats ◽  
Biomass Residues ◽  
Pressure Medium ◽  
Agro Residues

AbstractThe global demand for sustainable energy is increasing due to urbanization, industrialization, population, and developmental growth. Transforming the large quantities of biomass resources such as agro-residues/wastes could raise the energy supply and promote energy mix. Residues of biomass instituted in the rural and industrial centers are enormous, and poor management of these residues results in several indescribable environmental threats. The energy potential of these residues can provide job opportunities and income for nations. The generation and utilization of dissimilar biomass as feedstock for energy production via densification could advance the diversity of energy crops. An increase in renewable and clean energy demand will likely increase the request for biomass residues for renewable energy generation via densification. This will reduce the environmental challenges associated with burning and dumping of these residues in an open field. Densification is the process of compacting particles together through the application of pressure to form solid fuels. Marketable densification is usually carried out using conventional pressure-driven processes such as extrusion, screw press, piston type, hydraulic piston press, roller press, and pallet press (ring and flat die). Based on compaction, densification methods can be categorized into high-pressure, medium-pressure, and low-pressure compactions. The common densification processes are briquetting, pelletizing, bailing, and cubing. They manufacture solid fuel with desirable fuel characteristics—physical, mechanical, chemical, thermal, and combustion characteristics. Fuel briquettes and pellets have numerous advantages and applications both in domestic and industrial settings. However, for biomass to be rationally and efficiently utilized as solid fuel, it must be characterized to determine its fuel properties. Herein, an overview of the densification of biomass residues as a source of sustainable energy is presented.

scholarly journals Reassessment of tidal energy potential in India and a decision-making tool for tidal energy technology selection

2017 ◽  
Vol 8 (2) ◽  
pp. 85-97 ◽  
Author(s):  
K Murali ◽  
V Sundar
Keyword(s):  
Energy Conversion ◽  
Clean Energy ◽  
Tidal Energy ◽  
Technology Selection ◽  
Tidal Range ◽  
Energy Technology ◽  
Ocean Energy ◽  
Tidal Power ◽  
Energy Potential ◽  
Tidal Stream

Oceans have significant renewable energy options to provide environmental friendly and clean energy. Technology for ocean energy systems and the feasibility for extraction of the same is an important area on which research is being focused worldwide. This article covers a detailed review of available tidal energy conversion technologies and case studies, with specific focus on tidal power potential in India. The proven option for tidal energy conversion is barraging. Recently, open-type turbine (usually known as tidal stream turbines) has been studied by several researchers and pilot demonstrations have been made. While conventional turbines of 10–20 MW rating are used in barrages, the application of tidal stream turbines of 0.5–2.0 MW has been demonstrated in water depths between 40 and 60 m. A new scale is proposed for categorizing the tidal energy potential in terms of tidal velocity and tidal range which could be used to categorize the potential sites and their ranking. A new systematic approach proposed for the assessment of tidal energy conversion potential can facilitate the suitability of either tidal stream energy or tidal barrage for a location. Within this, one could also decide the site could be developed as a major project or minor project. Therefore, the present work will be useful for engineers and decision makers in technology selection investment potential identification.

scholarly journals Tidal stream energy potential in the Shannon Estuary

2021 ◽  
Author(s):  
D.M. Fouz ◽  
R. Carballo ◽  
I. López ◽  
G. Iglesias
Keyword(s):  
Energy Potential ◽  
Tidal Stream ◽  
Tidal Stream Energy

scholarly journals Priority Based Hybrid Renewable Energy Model for J&K

2021 ◽  
Vol 10 (3) ◽  
pp. 80-86
Author(s):  
Showkat Rasool Dar ◽  
Gopal Naryal ◽  
Anand Mohan
Keyword(s):  
Renewable Energy ◽  
Hybrid System ◽  
Energy Demand ◽  
Energy Potential ◽  
Data Set ◽  
Cost Of Energy ◽  
Hilly Region ◽  
Tremendous Amount ◽  
The Cost ◽  
Hybrid Renewable Energy

This paper presents energy requirements of J&K state of India with the present policies and future planning for the best utilization of the available resources. There will be acceleration in the future developmental graph in the country like India resulting in bulk of the energy demand. The procedures and methods applied currently adopted in renewable field aims for exploring possible energy production while considering the environmental impact. The hilly region such as J&K and Ladakh region has tremendous amount of renewable energy potential. The presentation of this paper aims the cost analysis of hybrid power system in the region. For optimization and sensitivity analysis, HOMER pro version 3.23.8 is used. The renewable resources for selected area are analyzed in Global Solar atlas (GSA) and Global wind atlas (GWA) and the result is compared with the meteorological tower data set. The modeling of the hybrid system is purposed on a 10% of load variability and as a result of the study, the levelized cost of energy (LCOE) from the hybrid system is obtained 0.0466 USD/kWh which will be 30 to 50 percent cheaper than the priceofelectricityfrom conventional system.

Direct ammonia fueled solid oxide fuel cells: A comprehensive review on challenges, opportunities and future outlooks

2020 ◽  
pp. 70-91 ◽  
Author(s):  
Molla Asmare ◽  
Mustafa Ilbas
Keyword(s):  
Electric Power ◽  
Energy Demand ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Performance Comparison ◽  
Optimum Operating ◽  
Practical Implementation ◽  
Human Society ◽  
Energy Access ◽  
Green Fuel

Nowadays, the most decisive challenges we are fronting are perfectly clean energy making for equitable and sustainable modern energy access, and battling the emerging alteration of the climate. This is because, carbon-rich fuels are the fundamental supply of utilized energy for strengthening human society, and it will be sustained in the near future. In connection with this, electrochemical technologies are an emerging and domineering tool for efficiently transforming the existing scarce fossil fuels and renewable energy sources into electric power with a trivial environmental impact. Compared with conventional power generation technologies, SOFC that operate at high temperature is emerging as a frontrunner to convert the fuels chemical energy into electric power and permits the deployment of varieties of fuels with negligible ecological destructions. According to this critical review, direct ammonia is obtained as a primary possible choice and price-effective green fuel for T-SOFCs. This is because T-SOFCs have higher volumetric power density, mechanically stable, and high thermal shocking resistance. Also, there is no sealing issue problem which is the chronic issues of the planar one. As a result, the toxicity of ammonia to use as a fuel is minimized if there may be a leakage during operation. It is portable and manageable that can be work everywhere when there is energy demand. Besides, manufacturing, onboard hydrogen deposition, and transportation infrastructure connected snags of hydrogen will be solved using ammonia. Ammonia is a low-priced carbon-neutral source of energy and has more stored volumetric energy compared with hydrogen. Yet, to utilize direct NH3 as a means of hydrogen carrier and an alternative green fuel in T-SOFCs practically determining the optimum operating temperatures, reactant flow rates, electrode porosities, pressure, the position of the anode, thickness and diameters of the tube are still requiring further improvement. Therefore, mathematical modeling ought to be developed to determine these parameters before planning for experimental work. Also, a performance comparison of AS, ES, and CS- T-SOFC powered with direct NH3 will be investigated and best-performed support will be carefully chosen for practical implementation and an experimental study will be conducted for verification based on optimum parameter values obtained from numerical modeling.

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