scholarly journals Energy Yield Assessment from Ocean Currents in the Insular Shelf of Cozumel Island

2019 ◽  
Vol 7 (5) ◽  
pp. 147 ◽  
Author(s):  
Juan Carlos Alcérreca-Huerta ◽  
Job Immanuel Encarnacion ◽  
Stephanie Ordoñez-Sánchez ◽  
Mariana Callejas-Jiménez ◽  
Gabriel Gallegos Diez Barroso ◽  
...  
Keyword(s):  
Fossil Fuels ◽  
Electricity Consumption ◽  
Acoustic Doppler Current Profiler ◽  
Field Measurements ◽  
Ocean Currents ◽  
Energy Yield ◽  
Alternative Source ◽  
Cozumel Island ◽  
Insular Shelf ◽  
Flow Velocities

Marine renewables represent a promising and innovative alternative source for satisfying the energy demands of growing populations while reducing the consumption of fossil fuels. Most technological advancements and energy yield assessments have focused on promoting the use of kinetic energy from tidal streams with flow velocities higher than 2.0 m s−1. However, slower-moving flows from ocean currents are recently explored due to their nearly continuous and unidirectional seasonal flows. In this study, the potential of the Yucatan Current was analysed at nearshore sites over the insular shelf of Cozumel Island in the Mexican Caribbean. Field measurements were undertaken using a vessel-mounted Acoustic Doppler Current Profiler (ADCP) to analyse the spatial distribution of flow velocities, along with Conductivity-temperature-depth (CTD) profiles as well as data gathering of bathymetry and water elevations. Northward directed flow velocities were identified, with increasing velocities just before the end of the strait of the Cozumel Channel, where average velocities in the region of 0.88–1.04 m s−1 were recorded. An estimation of power delivery using horizontal axis turbines was undertaken with Blade Element Momentum theory. It was estimated that nearly 3.2 MW could be supplied to Cozumel Island, amounting to about 10% of its electricity consumption.

Nigeria: Advancing the Cause of Renewable Energy in Nigeria’s Power Sector Through its Legal Framework

2021 ◽  
Vol 50 (4-5) ◽  
pp. 433-444
Author(s):  
Olusola Joshua Olujobi ◽  
Temilola Olusola-Olujobi
Keyword(s):  
Renewable Energy ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Legal Framework ◽  
Comparative Approach ◽  
Energy Sources ◽  
Power Sector ◽  
Alternative Source ◽  
Regulatory Policies ◽  
Oil Sector

Fossil fuels have been the mainstream of energy supply and a major source of foreign exchange earnings for the Federal Government of Nigeria, in spite of being an unrenewable and unsustainable source of energy. Nigeria is yet to tap into the full benefits after privatising its power sector, including the new global evolution in the energy sector and the resulting increasing demand for renewable energy sources, which some consider to be cheaper and more environmentally friendly than fossil fuels and their allied products. Energy security is a challenge to socio-economic development in Nigeria, due to the country’s over-dependency on fossil fuels. In terms of their impact and the potentials to preserve energy sources for longevity and sustainability, however, fossil fuels will come to be seen as an out-dated alternative in the power sector as the energy industry evolves. The implications for Nigeria’s oil sector will not be limited to dwindling crude oil prices. The concerns include poor energy utilisation in Nigeria and the need to promote energy efficiency and sustainability. They have led to the formulation of new energy policies around the world to serve as a vehicle for translating solutions into reality. This study has adopted a library-based legal research method with a comparative approach. The study reveals that it is the lack of a coherent legal framework with incentives for using renewable energy that is largely seen as the key issue causing slow uptake of renewable energy as an alternative source of energy in Nigeria. As well as the need for a coherent legal framework on energy and incentives for using renewable energy sources, the study advocates stringent enforcement of existing energy regulatory policies.

scholarly journals The U.S. Role and Policy in Central Asia: Energy and Beyond

2012 ◽  
pp. 33-51
Author(s):  
AKM Iftekharul Islam
Keyword(s):  
National Security ◽  
Central Asia ◽  
Fossil Fuels ◽  
The United States ◽  
Global Strategy ◽  
Energy Resources ◽  
Energy Potential ◽  
Alternative Source ◽  
The Arts ◽  
The U.S

A significant geopolitical consequence of the demise of the Soviet Union1 in the international arena is the rise of intense political and commercial competition for control of the vast energy resources of the newly independent and vulnerable states of the Caucasus and Central Asia. These energy resources and, in particular, the oil and natural gas deposits have now become the apple of discord in Central Asia introducing a new chapter in the Great Game of control over Eurasia (Hill 1997: 200). The region has great energy potential and is strategically important. The United States has varied and at times competing interests in Central Asia. In the past few years, real and present dangers to the U.S. national security especially Islamist terrorism and threats to the energy supply, have affected the U.S. policy in Central Asia. The region, which includes the five post-Soviet states of Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan, as well as Afghanistan and the Caspian basin, plays an important part in the U.S. global strategy in view of its proximity to Russia, China, India, Pakistan, Iran, and other key regional actors. No less important are its ethno-religious composition and vast deposits of oil, gas, coal, and uranium. Literally, the U.S. interests in Central Asia can be summarized in three simple words: security, energy, and democracy. Moreover, a key U.S. national security concern is the diversification of energy sources and the Caspian region is a significant alternative source of fossil fuels. In this article a critical analysis will be attempted on the U.S. policy and role in central Asia. DOI: http://dx.doi.org/10.3329/afj.v4i0.12931 The Arts Faculty Journal Vol.4 July 2010-June 2011 pp.33-51

Preparation and Characterization of Nanocomposite Calcium Doped Ceria Electrolyte With Alkali Carbonates (NK-CDC) for SOFC

2010 ◽  
Author(s):  
Ghazanfar Abbas ◽  
Rizwan Raza ◽  
Muhammad Ashraf Chaudhry ◽  
Bin Zhu
Keyword(s):  
Electron Microscopy ◽  
Fossil Fuels ◽  
Electrochemical Impedance ◽  
Renewable Energy Sources ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Doped Ceria ◽  
Alternative Source ◽  
Calcium Doped ◽  
Co Precipitation

The entire world’s challenge is to find out the renewable energy sources due to rapid depletion of fossil fuels because of their high consumption. Solid Oxide Fuel Cells (SOFCs) are believed to be the best alternative source which converts chemical energy into electricity without combustion. Nanostructured study is required to develop highly ionic conductive electrolyte for SOFCs. In this work, the calcium doped ceria (Ce0.8Ca0.2O1.9) coated with 20% molar ratio of two alkali carbonates (CDC-M: MCO3, where M = Na and K) electrolyte was prepared by co-precipitation method in this study. Ni based electrode was used to fabricate the cell by dry pressing technique. The crystal structure and surface morphology was characterized by X-Ray Diffractometer (XRD), Scanning Electron Microscopy (SEM) and High Resolution Transmission Electron Microscopy (HRTEM). The particle size was calculated in the range of 10–20nm by Scherrer’s formula and compared with SEM and TEM results. The ionic conductivity was measured by using AC Electrochemical Impedance Spectroscopy (EIS) method. The activation energy was also evaluated. The performance of the cell was measured 0.567W/cm2 at temperature 550°C with hydrogen as a fuel.

scholarly journals Analysis of Energy System in Norway with Focus on Energy Consumption Prediction

2017 ◽  
Vol 9 (1) ◽  
pp. 5-14 ◽  
Author(s):  
Maryam Hamlehdar ◽  
Alireza Aslani
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Energy System ◽  
High Energy ◽  
Regression Result ◽  
Industry Growth ◽  
The Status

Abstract Today, the fossil fuels have dominant share of energy supply in order to respond to the high energy demand in the world. Norway is one of the countries with rich sources of fossil fuels and renewable energy sources. The current work is to investigate on the status of energy demand in Norway. First, energy and electricity consumption in various sectors, including industrial, residential are calculated. Then, energy demand in Norway is forecasted by using available tools. After that, the relationship between energy consumption in Norway with Basic economics parameters such as GDP, population and industry growth rate has determined by using linear regression model. Finally, the regression result shows a low correlation between variables.

scholarly journals ANALYSIS OF THE CAUSALITY OF CO2 EMISSIONS, CONSUMPTION OF FOSSIL FUELS, ELECTRICITY CONSUMPTION, AND ECONOMIC GROWTH IN INDONESIA IN 1990-2019

2019 ◽  
Vol 4 (02) ◽  
pp. 113
Author(s):  
Melati Intan Kurnia ◽  
Hadi Sasana ◽  
Yustirania Septiani
Keyword(s):  
Economic Growth ◽  
Energy Consumption ◽  
Fuel Consumption ◽  
Co2 Emissions ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Electricity Consumption ◽  
Negative Influence ◽  
Fossil Fuel Consumption

<p><em>Increasing economic growth will spark against increased energy consumption. But on the other hand, increasing economic growth will also trigger the occurrence of natural damage and degradation of environmental quality derived from CO2 emissions. CO2 emissions are caused by oxidation process of fossil fuel energy. This research aims to know the causality relationship between CO2 emissions, fossil fuel consumption, electricity consumption, and economic growth in Indonesia, as well as long-term relationship between CO2 emissions, fossil fuel consumption, electricity consumption, to economic growth in Indonesia in 1990 – 2019. The used data is the secondary data that is in the form of data time series. The dependent variables of this study are economic growth, while independent variables are CO2 emissions, fossil fuel consumption, electricity consumption. The method that is used in this study is Vector Error Correction Model. The results showed that there was a one-way causality between economic growth and fossil fuel consumption, and between electricity consumption and CO2 emissions. The research also shows that on long-term CO2 emissions has a negative influence, while the consumption of fossil fuels and electricity has a positive effect on Indonesia's economic growth in 1990-2019.</em></p><p><strong><em>K</em></strong><strong><em>eywords</em></strong><em>: CO2, Energy Consumption, Economic Growth.</em></p>

Application of response surface methodology for optimization of growth and lipids in Scenedesmus abundans using batch culture system

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 22129-22140 ◽  
Author(s):  
Chelladurai Chellamboli ◽  
Muthiah Perumalsamy
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Batch Culture ◽  
Culture System ◽  
Fossil Fuels ◽  
Biofuel Production ◽  
Alternative Source ◽  
System P

Owing to an increased demand for fuel and the depletion of fossil fuels, an alternative source such as algae is currently being exploited for biofuel production.

scholarly journals Sensitivity analysis using simulations for a ground source heat pump – implementation on a solar passive house

2019 ◽  
Vol 111 ◽  
pp. 01070
Author(s):  
Gheorghe Ilisei ◽  
Tiberiu Catalina ◽  
Robert Gavriliuc
Keyword(s):  
Sensitivity Analysis ◽  
Heat Pump ◽  
Fossil Fuels ◽  
Electricity Consumption ◽  
Heat Pumps ◽  
Ground Source Heat Pump ◽  
Passive House ◽  
Modeling Tools ◽  
Ground Source Heat Pumps ◽  
Ground Source

Having in sight the need for a strong reduction in CO2 emissions and the fluctuation of the price of fossil fuels, the ground source resources alongside with the ground source heat pumps are becoming more and more widespread for meeting the heating/cooling demand of several types of buildings. This article targets to develop the thermal modelling of borehole heat storage systems. Trying to emphasize some certain advantages of a GSHP (ground source heat pump) with vertical boreholes, a case study analysing a residential solar passive house is presented. The numerical results are produced using different modelling software like DesignBuilder, EED (Earth Energy Designer) and a sizing method for the length of the boreholes (ASHRAE method). The idea of sizing the length of boreholes (main design parameter and good index in estimating the system’s cost) using two different methods shows the reliability of this modelling tool. The study shows that borehole’s length of a GSHP system can trigger a difference in electricity consumption up to 22%. Moreover, this sensitivity analysis aims to prove that the design of the whole system can be done beforehand just using modeling tools, without performing tests in-situ.

scholarly journals Energy Security and Scenario Analysis of Province No. 1 of Federal Republic Nepal

2018 ◽  
Vol 4 ◽  
pp. 163-173
Author(s):  
Sujan Dulal ◽  
Shree Raj Shakya
Keyword(s):  
Energy Security ◽  
Fossil Fuels ◽  
Electricity Consumption ◽  
High Growth ◽  
Normal Growth ◽  
Provincial Government ◽  
Electrical Systems ◽  
Security Indicators ◽  
Business As Usual ◽  
Intervention Scenario

This paper presents the current energy security status of the province No.1 of Nepal using numerous indicators. In addition to that, with the development of six economic growth scenarios i.e. Business As Usual (BAU), Low growth (LOW), High growth (HIG), Accelerated growth (ACC), Normal growth (NOR) and Intervention scenario (INT), the future energy mix and energy security indicators for the year 2040 are also calculated. The paper also gives an overview of the variation/progress of the different indicators during the considered period of study. The study shows that the, energy intensity in the intervention scenario is brought down to 4.44 GJ/$1000 compared to that of 15 GJ/$1000. Also, the electricity consumption per capita is increased to 574 kWh from 116 in the base year. However, these values are only achieved if the provincial government helps implementing central government's plan of promoting the electrical systems instead of traditional fuel woods and fossil fuels system.

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