Advanced Energy: An International Journal (AEIJ)
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Advanced Energy: An International Journal (AEIJ) is a quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the Energy Engineering and allied fields. This multi disciplinary journal is devoted to the publication of high quality papers on theoretical and practical aspects of Energy Engineering.
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Call for papers-advanced_energy_an_international journal
Advanced Energy: An International Journal (AEIJ) is a quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the Energy Engineering and allied fields. This multi disciplinary journal is devoted to the publication of high quality papers on theoretical and practical aspects of Energy Engineering.
Aeij
Advanced Energy: An International Journal is a quarterly peer-reviewed journal that publishes articles on theoretical and practical aspects of energy engineering and related fields. The journal invites authors to submit original research, projects, case studies, and papers on topics such as renewable energy systems, power plant technologies, energy storage, electrical grids, and energy management. Manuscripts may be submitted through March 26, 2017 and should not have been previously published.
8th International Conference on Electrical & Computer Engineering (E& C 2024)
8th International Conference on Electrical & Computer Engineering (E& C 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications impacts and challenges of Electrical & Computer Engineering. The conference documents practical and theoretical results which make a fundamental contribution for the development of Electrical & Computer Engineering. The aim of the conference is to provide a platform to the researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the field.
Call for Papers - 8th International Conference on Electrical & Computer Engin...
8th International Conference on Electrical & Computer Engineering (E& C 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications impacts and challenges of Electrical & Computer Engineering. The conference documents practical and theoretical results which make a fundamental contribution for the development of Electrical & Computer Engineering. The aim of the conference is to provide a platform to the researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the field.
Authors are solicited to contribute to the conference by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the following areas, but are not limited to:
DYNAMICS IN THE HISTORY AND ECONOMIC DEVELOPMENT OF MAN: REFOCUSING ON ECOLOG...
Man’s history and development endeavours have beenadvancing alongside a trail of ecological
ramifications and climate change. Since prehistoric times, scientists have not recorded an accelerated shift
in the ecologyof the planet during any other epoch beside that of modern man. The paper seeks to explore
how man’s history and developmentaffects ecologyand climate. It uses desk analysis to recollect data from
global assessment reportsand runs a One paired Sample Means t-Test, 1 tailed, 8 df, at Pearson
Correlation value 0.458 and 0.5 alpha level. Findings show that, there is globalclimate change, seen in
global warming trends; andimbalance in ecological footprint, seen in depletion of air, water and land
sinks. The t-Test reveals significant net loss of global forest cover.The study also,apparently found that,
processes ofdevelopment generally tend to damage ecology. Therefore,the study recommends a refocus to
sustainable means of development.
Direct Alcohol Alkaline Fuel Cell as Future Prospectus
Fuel cells are called the fourth electricity power generation after water, nuclear power generation devices.
Fuel cells are widely recognized as very attractive devices to obtain directly electric energy from the
electrochemical combustion of chemical products. When fuel cells are continuously supplied fuel and
oxidant, electricity can be made constantly. According to the different electrolytes, fuel cells can be divided
into different types among them, alkaline fuel cell is best as compared to others ones. Due to the activation
overvoltage at the cathode is generally less than that with an acid electrolyte and there are very few
standard chemicals that are cheaper than potassium hydroxide. These fuel cells have longer lifetimes, and
do not require expensive noble metal catalysts to be used. Noble metal catalysts may be used, but less is
needed to achieve a similar reaction rate. The main objective of the study is to use different kind of
alcohols in alkaline fuel cell and determined the characteristics at different parameter.
COMPARING ECONOMIC FEASIBILITY OF DOMESTIC SOLAR WATER HEATER INSTALLATION IN...
The document compares the economic feasibility of installing domestic solar water heaters in three major cities of Pakistan: Lahore, Karachi, and Peshawar. Using RETScreen simulation software, the study finds that a solar water heater would be most feasible to install in Peshawar based on several factors. A system in Peshawar would save the most natural gas, have the shortest payback period, highest internal rate of return, and greatest net present value among the three cities. The study concludes that while solar water heating is economically feasible in all three cities, it is most beneficial option for Peshawar.
FREE CONVECTION HEAT TRANSFER OF NANOFLUIDS FROM A HORIZONTAL PLATE EMBEDDED ...
In this paper the natural convection heat transfer from a horizontal plate embedded in a porous medium
saturated with a nanofluid is numerically analyzed. By a similarity approach the partial differential
equations are reduced to a set of two ordinary differential equations. In order to evaluate the influence of
nanoparticles on the heat transfer, Ag and Cuo as the nanoparticles were selected. Results show that heat
transfer rate (Nur) is a decreasing function of volume fraction of nanoparticles.
Recommended
Call for papers-advanced_energy_an_international journal
Advanced Energy: An International Journal (AEIJ) is a quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the Energy Engineering and allied fields. This multi disciplinary journal is devoted to the publication of high quality papers on theoretical and practical aspects of Energy Engineering.
Aeij
Advanced Energy: An International Journal is a quarterly peer-reviewed journal that publishes articles on theoretical and practical aspects of energy engineering and related fields. The journal invites authors to submit original research, projects, case studies, and papers on topics such as renewable energy systems, power plant technologies, energy storage, electrical grids, and energy management. Manuscripts may be submitted through March 26, 2017 and should not have been previously published.
8th International Conference on Electrical & Computer Engineering (E& C 2024)
8th International Conference on Electrical & Computer Engineering (E& C 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications impacts and challenges of Electrical & Computer Engineering. The conference documents practical and theoretical results which make a fundamental contribution for the development of Electrical & Computer Engineering. The aim of the conference is to provide a platform to the researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the field.
Call for Papers - 8th International Conference on Electrical & Computer Engin...
8th International Conference on Electrical & Computer Engineering (E& C 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications impacts and challenges of Electrical & Computer Engineering. The conference documents practical and theoretical results which make a fundamental contribution for the development of Electrical & Computer Engineering. The aim of the conference is to provide a platform to the researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the field.
Authors are solicited to contribute to the conference by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the following areas, but are not limited to:
DYNAMICS IN THE HISTORY AND ECONOMIC DEVELOPMENT OF MAN: REFOCUSING ON ECOLOG...
Man’s history and development endeavours have beenadvancing alongside a trail of ecological
ramifications and climate change. Since prehistoric times, scientists have not recorded an accelerated shift
in the ecologyof the planet during any other epoch beside that of modern man. The paper seeks to explore
how man’s history and developmentaffects ecologyand climate. It uses desk analysis to recollect data from
global assessment reportsand runs a One paired Sample Means t-Test, 1 tailed, 8 df, at Pearson
Correlation value 0.458 and 0.5 alpha level. Findings show that, there is globalclimate change, seen in
global warming trends; andimbalance in ecological footprint, seen in depletion of air, water and land
sinks. The t-Test reveals significant net loss of global forest cover.The study also,apparently found that,
processes ofdevelopment generally tend to damage ecology. Therefore,the study recommends a refocus to
sustainable means of development.
Direct Alcohol Alkaline Fuel Cell as Future Prospectus
Fuel cells are called the fourth electricity power generation after water, nuclear power generation devices.
Fuel cells are widely recognized as very attractive devices to obtain directly electric energy from the
electrochemical combustion of chemical products. When fuel cells are continuously supplied fuel and
oxidant, electricity can be made constantly. According to the different electrolytes, fuel cells can be divided
into different types among them, alkaline fuel cell is best as compared to others ones. Due to the activation
overvoltage at the cathode is generally less than that with an acid electrolyte and there are very few
standard chemicals that are cheaper than potassium hydroxide. These fuel cells have longer lifetimes, and
do not require expensive noble metal catalysts to be used. Noble metal catalysts may be used, but less is
needed to achieve a similar reaction rate. The main objective of the study is to use different kind of
alcohols in alkaline fuel cell and determined the characteristics at different parameter.
COMPARING ECONOMIC FEASIBILITY OF DOMESTIC SOLAR WATER HEATER INSTALLATION IN...
The document compares the economic feasibility of installing domestic solar water heaters in three major cities of Pakistan: Lahore, Karachi, and Peshawar. Using RETScreen simulation software, the study finds that a solar water heater would be most feasible to install in Peshawar based on several factors. A system in Peshawar would save the most natural gas, have the shortest payback period, highest internal rate of return, and greatest net present value among the three cities. The study concludes that while solar water heating is economically feasible in all three cities, it is most beneficial option for Peshawar.
FREE CONVECTION HEAT TRANSFER OF NANOFLUIDS FROM A HORIZONTAL PLATE EMBEDDED ...
In this paper the natural convection heat transfer from a horizontal plate embedded in a porous medium
saturated with a nanofluid is numerically analyzed. By a similarity approach the partial differential
equations are reduced to a set of two ordinary differential equations. In order to evaluate the influence of
nanoparticles on the heat transfer, Ag and Cuo as the nanoparticles were selected. Results show that heat
transfer rate (Nur) is a decreasing function of volume fraction of nanoparticles.
GDQ SIMULATION FOR FLOW AND HEAT TRANSFER OF A NANOFLUID OVER A NONLINEARLY S...
This paper presents the generalized differential quadrature (GDQ) simulation for analysis of a nanofluid
over a nonlinearly stretching sheet. The obtained governing equations of flow and heat transfer are
discretized by GDQ method and then are solved by Newton-Raphson method. The effects of stretching
parameter, Brownian motion number (Nb), Thermophoresis number (Nt) and Lewis number (Le), on the
concentration distribution and temperature distribution are evaluated. The obtained results exhibit that
ASSESSING PERCEPTUAL VIDEO QUALITY IN WIMAX NETWORKS
This paper presents an approach for assessing the perceptual quality of wireless video networking
applications transmitted via WiMAX, the Worldwide Interoperability for Microwave Access air interface
standard. The Video Quality Model developed by Information Administration’s Video Quality Expert
Group is used to benchmark perceptual video quality.
Layer-Type Power Transformer Thermal Analysis Considering Effective Parameter...
Since large power transformers belong to the most valuable assets in electrical power networks it is
suitable to pay higher attention to these operating resources. Thermal impact leads not only to long-term
oil/paper-insulation degradation; it is also a limiting factor for the transformer operation. Therefore, the
knowledge of the temperature, especially the hottest spot (HST) temperature, is of high interest. This paper
presents steady state temperature distribution of a power transformer layer-type winding using conjugated
heat transfer analysis, therefore energy and Navier-Stokes equations are solved using finite difference
method. Meanwhile, the effects of load conditions and type of oil on HST are investigated using the model.
Oil in the transformer is assumed nearly incompressible and oil parameters such as thermal conductivity,
special heat, viscosity, and density vary with temperature. Comparing the results with those obtained from
finite integral transform checks the validity and accuracy of the proposed method
STUDY OF THE EQUIVALENT CIRCUIT OF A DYESENSITIZED SOLAR CELLS
The dye-sensitized solar cells (DSSC) have gained the last decades an important place among photovoltaic
technologies due to their low-cost of implementation and their performance, which becomes more efficient.
The experimental data for this type of cells are enriched and accumulated quickly, given the enthusiasm for
this new technology. The present work treats the equivalent circuit of a dye-sensitized solar cell (DSSC) for
a model in an exponential, and by using the results of some works, we shall make a simulation by the
software Scilab to obtain the characteristics (I-V), then we will study the influence of every parameter on
the curve.
TRANSIENT STABILITY IMPROVEMENT OF POWER SYSTEMS BY OPTIMAL SIZING AND ALLOCA...
Employing Resistive Superconducting Fault Current Limiters (RSFCL) is one of the practical and effective
methods to improve the transient stability of a power system by limiting the fault current. Regarding
technical and economical constraints, optimal sizing and allocation of RSFCLs in a power system is of
significant importance. It is the purpose of this paper to propose an algorithm based on the Particle Swarm
Optimization (PSO) in order to improve the transient stability of a power system by optimal sizing and
allocation of RSFCLs. The proposed algorithm is next applied to the New England 39-bus test system as a
case study and the results are simulated in Matlab. Simulation results reveal that in the case of employing
RSFCLs with sizes and locations resulted from the optimization algorithm, the transient stability of the
power system under study is improved. Furthermore, it seems that the optimal locations of RSFCLs are to
some extent near the fault location.
A Review on RDB to RDF Mapping for Semantic Web
In Databases one of the active research fields is mapping relational databases (RDB) into Resource
Description Framework (RDF). An enormous data is kept in the form of relational databases and accessing
of data is done in the semantic web. The data stored in RDB is to be efficiently mapped to the semantic web
or RDF for data availability to the users. There is a definite need for improvement in technologies for
efficient mapping languages from RDB to RDF in semantic web. This paper presents an up-to-date survey
of different RDB to RDF mapping languages proposed in recent times. It outlines the main features or
characteristics to be considered for efficient mapping in different scenarios. The main objective of this
content, pictures identification of limitations existing in the mapping languages. It also enhances the
comparisons between each language and helps researchers to propose further better proposals in their
future scope of work to improve better mapping techniques.
Dynamics in the History and Economic Development of Man: Refocusing on Ecolog...
Man’s history and development endeavours have beenadvancing alongside a trail of ecological
ramifications and climate change. Since prehistoric times, scientists have not recorded an accelerated shift
in the ecologyof the planet during any other epoch beside that of modern man. The paper seeks to explore
how man’s history and developmentaffects ecologyand climate. It uses desk analysis to recollect data from
global assessment reportsand runs a One paired Sample Means t-Test, 1 tailed, 8 df, at Pearson
Correlation value 0.458 and 0.5 alpha level. Findings show that, there is globalclimate change, seen in
global warming trends; andimbalance in ecological footprint, seen in depletion of air, water and land
sinks. The t-Test reveals significant net loss of global forest cover.The study also,apparently found that,
processes ofdevelopment generally tend to damage ecology. Therefore,the study recommends a refocus to
sustainable means of development.
SIMULATION OF THE SOLAR CELLS WITH PC1D, APPLICATION TO CELLS BASED ON SILICON
A way of exploiting the solar energy is to use cells photovoltaic which convert the energy conveyed by the
incidental radiation in a continuous electric current. This conversation is based on the photovoltaic effect
engendered by the absorption of photons. A part of the absorbed photons generates pairs electron-hole in
which an electric field created in the zone of load of space of a junction p–n.
Thus, the junction p-n, its characteristics, its components and its dimensions are the parameters
responsible of the efficiency and the performances of a solar cell. To study this, we are going to use a very
known software in the mode of the simulation of solar cells, the PC1D, and we are going, at the end, to
draw a conclusion around the ideal parameters that a good solar cell has to have.
DESIGN AND DEVELOPMENT OF WIND TURBINE EMULATOR TO OPERATE WITH 1.5KW INDUCTI...
This paper contributes to design a Wind Emulator coupled to 1.5 kW Induction generator for Wind Energy
Conversion System. A wind turbine emulator (WTE) is important equipment for developing wind energy
conversion systems. It offers a controllable test environment that allows the evaluation and improvement of
control schemes for electric generators that is hard to achieve with an actual wind turbine since the wind
speed varies randomly. In this paper a wind emulator is modelled and simulated using MATLAB.
Verification of the simulation results is done by experimental setup using DC motor-Induction generator
set, LABVIEW and data acquisition card.
EVALUATING MATHEMATICAL HEAT TRANSFER EFFECTIVENESS EQUATIONS USING CFD TECHN...
Mathematical heat transfer equations for finned double pipe heat exchangers based on experimental work
carried out in the 1970s can be programmed in a spreadsheet for repetitive use. Thus avoiding CFD
analysis which can be time consuming and costly. However, it is important that such mathematical
equations be evaluated for their accuracy. This paper uses CFD methods in evaluating the accuracy of
mathematical equations. Several models were created with varying; geometry, flue gas entry temperature,
and flow rates. The analysis should provide designers and manufacturers a judgment on the expected level
of accuracy when using mathematical modelling methodology. This paper simultaneously identifies best
practices in carrying out such CFD analysis.
Co integration Relationship Between Economic Growth, Export and Electricity C...
This study examines the long-run relationship between economic growth, exports, and electricity consumption in Fiji from 1981-2011. It finds:
1) The variables of economic growth, exports, and electricity consumption are cointegrated, indicating they share a common stochastic trend in the long-run.
2) In the long-run, causality runs from electricity consumption and exports to economic growth.
3) In the short-run, deviations from the long-run equilibrium between the variables are corrected at a rate of 22% per year, as shown by the error correction model.
The results suggest that policies aimed at reducing electricity consumption may negatively impact long-run economic growth in Fiji.
Effect of Zn Concentration On Structural and Optical Proprieties Of ZNO Thin ...
This document summarizes research on the effect of zinc nitrate concentration on the structural and optical properties of ZnO thin films deposited by spray pyrolysis. The following key points are made:
1) X-ray diffraction analysis showed the films were polycrystalline with a hexagonal wurtzite structure. Increasing the zinc nitrate concentration improved crystallinity and increased grain size.
2) Atomic force microscopy revealed the grain size increased from 13.3nm to 44.9nm as concentration rose from 0.05M to 0.2M. Surface roughness also increased with concentration.
3) Infrared spectroscopy showed peaks corresponding to O-H and N-H bonds, indicating water and residual
Split Second Analysis Covering High Pressure Gas Flow Dynamics At Pipe Outlet...
A detailed investigation covering piped gas flow characteristics in high pressure flow conditions. Such flow
analysis can be resolved using established mathematical equations known as the Fanno condition, which
usually cover steady state, or final flow conditions. However, in real life, such flow conditions are
transient, varying with time. This paper uses CFD analysis providing a split second “snapshot” at what
happens at the pipe outlet, and therefore, a closer understanding at what happens at the pipe’s outlet in
high pressure gas flow condition.
In this example air was selected for simulation purposes. In HVAC applications, such gas flow conditions
can occur in typical applications such as; air compressors releasing high pressure air through a pipe, or
compressor over pressure refrigerant gas being released into the atmosphere via a discharge pipe.
Investigation has shown that rather than a steady mass flow rate condition occurring at the pipe outlet,
calculated by the Fanno flow condition, a spiked increase in flow rate occurs at the beginning,and then
stabilizing after a few seconds, with relatively minor ripples in flow rate. Other observations were also
made and commented.
CFD results in mass flow rate were compared with the mathematically derived results, differences were
recorded. The CFD analysis showed how the k-omega turbulence model performed well, with the processor
stabilizing at an early stage.
The Force Convection Heat Transfer of A Nanofluid Over A Flat Plate: Using Th...
Advanced Energy: An International Journal (AEIJ) is a quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the Energy Engineering and allied fields. This multi disciplinary journal is devoted to the publication of high quality papers on theoretical and practical aspects of Energy Engineering.
A MODIFIED ANT COLONY ALGORITHM FOR SOLVING THE UNIT COMMITMENT PROBLEM
Solving the unit commitment (UC) problem is one of the most complicated issues in power systems that its
exact solving can be calculated by perfect counting of entire possible compounds of generative units. UC is
equated as a nonlinear optimization with huge size. Purpose of solving this problem is to programming the
optimization of the generative units to minimize the full action cost regarding problem constraints. In this
article, a modified version of ant colony optimization (MACO) is introduced for solving the UC problem in
a power system. ACO algorithm is a powerful optimization method which has the capability of fleeing from
local minimums by performing flexible memory system. The efficiency of proposed method in two power
system containing 4 and 10 generative units is indicated. Comparison of obtained results from the proposed
method with results of the past well-known methods is a proof for suitability of performing the introduced
algorithm in economic input and output of generative units.
Impedance Spectroscopy Analysis of a Liquid Tin Anode Fuel Cell in Voltage Re...
A concept of a liquid tin anode-indirect carbon air fuel cell (LTA-ICFC) are described. Experimental
setups for analysis of LTA-ICFC polarisations of an operational electrochemical reactor of the LTA-ICFC
are presented. Results from Electrochemical Impedance Spectroscopy (EIS) Analysis of the electrochemical
reactor of the LTA-ICFC are shown and analysed.The rate-determining step of the system is concluded.
The charge-transfer resistance did not show considerable differences at 700-800 °C. This can be implied
that the charge-transfer resistance is not the rate-limiting step of the transport processes of the fuel cell.
The increase of the Warburg impedance concurrently with the resistance to fit mass-transport loss (R3)
suggests that the rate-limiting step for the LTA-ICFC in voltage recovery mode is the diffusion of the oxide
ions through SnO2 layer. The increment of mass transport lost, R3, of the cell causes the slowly increase of
the cell’s voltage over the voltage from 0.7-0.8 V at 700, 750, and 800 °C.
Impedance Spectroscopy Analysis of a Liquid Tin Anode Fuel Cell in Voltage Re...
A concept of a liquid tin anode-indirect carbon air fuel cell (LTA-ICFC) are described. Experimental
setups for analysis of LTA-ICFC polarisations of an operational electrochemical reactor of the LTA-ICFC
are presented. Results from Electrochemical Impedance Spectroscopy (EIS) Analysis of the electrochemical
reactor of the LTA-ICFC are shown and analysed.The rate-determining step of the system is concluded.
The charge-transfer resistance did not show considerable differences at 700-800 °C. This can be implied
that the charge-transfer resistance is not the rate-limiting step of the transport processes of the fuel cell.
The increase of the Warburg impedance concurrently with the resistance to fit mass-transport loss (R3)
suggests that the rate-limiting step for the LTA-ICFC in voltage recovery mode is the diffusion of the oxide
ions through SnO2 layer. The increment of mass transport lost, R3, of the cell causes the slowly increase of
the cell’s voltage over the voltage from 0.7-0.8 V at 700, 750, and 800 °C.
Energy Status and Alternative Energy Plans of Major Energy Consumers in South...
Southeast Asia comprises an extraordinarily diverse set of countries with vast differences in the scale and
patterns of energy use and energy resources endowments. Indonesia and Thailand have been selected to be
compared because they are the two largest consumers in energy sector in the region and both countries
still similarly rely on energy imports such as oil. They have been facing challenges in energy policy
reformation distorting energy markets. The combined energy status of Indonesia and Thailand not only
aims at providing policy makers with an understanding of the energy trends and challenges being faced by
the countries up to the next two decades, but also at confidently convincing them the future energy
pathways to unlocking energy efficiency potential and investment. This work contains data and information
on pattern of energy use in the past, present, and future, some economic and political factors that may be
affecting energy demand and supply of Indonesia and Thailand. Key energy issues that need to be
considered are introduced. The potential future energy pathways are included and compared between the
countries. Investment opportunities in each country are also identified.
FEASIBILITY STUDY OF ORKNEY’S WINDFARM DEVELOPMENT FOR SELF-SUFFICIENT FOR ...
In Orkney islands, a number of wind energy projects have been established due to its potential for wind
energy development especially as cluster developments on hilltop and moorland. This Self-sufficient
Orkney Wind Energy (SOWE) project is trying to follow this pattern of development and has designed as a
simple linear development of medium-large scale wind turbines which avoids dominating the landscape,
while providing diversification required for the energy security, along with strong economic benefits to the
local community. The developer completed preliminary designs and landscape assessment, resulting in the
detailed design and the development of 27 wind turbine project for the expectation to generated electricity
of 549.2 GWh annually.
An Engineering Approach for Harvesting Energy from Wind, Wave and Storm
The world is now facing energy scarcity and climate change. In that context, renewable energy is gradually
replacing fossil fuels. However, this source of energy has not been fully exploited. Some natural disasters
bring a lot of energy but are not exploited; in particular, storms are among the heavyweights. In this paper,
I propose a device for harvesting energy from wind, waves and especially storms. One such device is called
a Stormbuoy. If used in practice and deployed on a large scale, the Stormbuoy will harvest significant
amounts of energy from wind, waves and storms. This not only solved the problem of energy scarcity but
also mitigated the destruction of the storm with humans.
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GDQ SIMULATION FOR FLOW AND HEAT TRANSFER OF A NANOFLUID OVER A NONLINEARLY S...
This paper presents the generalized differential quadrature (GDQ) simulation for analysis of a nanofluid
over a nonlinearly stretching sheet. The obtained governing equations of flow and heat transfer are
discretized by GDQ method and then are solved by Newton-Raphson method. The effects of stretching
parameter, Brownian motion number (Nb), Thermophoresis number (Nt) and Lewis number (Le), on the
concentration distribution and temperature distribution are evaluated. The obtained results exhibit that
ASSESSING PERCEPTUAL VIDEO QUALITY IN WIMAX NETWORKS
This paper presents an approach for assessing the perceptual quality of wireless video networking
applications transmitted via WiMAX, the Worldwide Interoperability for Microwave Access air interface
standard. The Video Quality Model developed by Information Administration’s Video Quality Expert
Group is used to benchmark perceptual video quality.
Layer-Type Power Transformer Thermal Analysis Considering Effective Parameter...
Since large power transformers belong to the most valuable assets in electrical power networks it is
suitable to pay higher attention to these operating resources. Thermal impact leads not only to long-term
oil/paper-insulation degradation; it is also a limiting factor for the transformer operation. Therefore, the
knowledge of the temperature, especially the hottest spot (HST) temperature, is of high interest. This paper
presents steady state temperature distribution of a power transformer layer-type winding using conjugated
heat transfer analysis, therefore energy and Navier-Stokes equations are solved using finite difference
method. Meanwhile, the effects of load conditions and type of oil on HST are investigated using the model.
Oil in the transformer is assumed nearly incompressible and oil parameters such as thermal conductivity,
special heat, viscosity, and density vary with temperature. Comparing the results with those obtained from
finite integral transform checks the validity and accuracy of the proposed method
STUDY OF THE EQUIVALENT CIRCUIT OF A DYESENSITIZED SOLAR CELLS
The dye-sensitized solar cells (DSSC) have gained the last decades an important place among photovoltaic
technologies due to their low-cost of implementation and their performance, which becomes more efficient.
The experimental data for this type of cells are enriched and accumulated quickly, given the enthusiasm for
this new technology. The present work treats the equivalent circuit of a dye-sensitized solar cell (DSSC) for
a model in an exponential, and by using the results of some works, we shall make a simulation by the
software Scilab to obtain the characteristics (I-V), then we will study the influence of every parameter on
the curve.
TRANSIENT STABILITY IMPROVEMENT OF POWER SYSTEMS BY OPTIMAL SIZING AND ALLOCA...
Employing Resistive Superconducting Fault Current Limiters (RSFCL) is one of the practical and effective
methods to improve the transient stability of a power system by limiting the fault current. Regarding
technical and economical constraints, optimal sizing and allocation of RSFCLs in a power system is of
significant importance. It is the purpose of this paper to propose an algorithm based on the Particle Swarm
Optimization (PSO) in order to improve the transient stability of a power system by optimal sizing and
allocation of RSFCLs. The proposed algorithm is next applied to the New England 39-bus test system as a
case study and the results are simulated in Matlab. Simulation results reveal that in the case of employing
RSFCLs with sizes and locations resulted from the optimization algorithm, the transient stability of the
power system under study is improved. Furthermore, it seems that the optimal locations of RSFCLs are to
some extent near the fault location.
A Review on RDB to RDF Mapping for Semantic Web
In Databases one of the active research fields is mapping relational databases (RDB) into Resource
Description Framework (RDF). An enormous data is kept in the form of relational databases and accessing
of data is done in the semantic web. The data stored in RDB is to be efficiently mapped to the semantic web
or RDF for data availability to the users. There is a definite need for improvement in technologies for
efficient mapping languages from RDB to RDF in semantic web. This paper presents an up-to-date survey
of different RDB to RDF mapping languages proposed in recent times. It outlines the main features or
characteristics to be considered for efficient mapping in different scenarios. The main objective of this
content, pictures identification of limitations existing in the mapping languages. It also enhances the
comparisons between each language and helps researchers to propose further better proposals in their
future scope of work to improve better mapping techniques.
Dynamics in the History and Economic Development of Man: Refocusing on Ecolog...
Man’s history and development endeavours have beenadvancing alongside a trail of ecological
ramifications and climate change. Since prehistoric times, scientists have not recorded an accelerated shift
in the ecologyof the planet during any other epoch beside that of modern man. The paper seeks to explore
how man’s history and developmentaffects ecologyand climate. It uses desk analysis to recollect data from
global assessment reportsand runs a One paired Sample Means t-Test, 1 tailed, 8 df, at Pearson
Correlation value 0.458 and 0.5 alpha level. Findings show that, there is globalclimate change, seen in
global warming trends; andimbalance in ecological footprint, seen in depletion of air, water and land
sinks. The t-Test reveals significant net loss of global forest cover.The study also,apparently found that,
processes ofdevelopment generally tend to damage ecology. Therefore,the study recommends a refocus to
sustainable means of development.
SIMULATION OF THE SOLAR CELLS WITH PC1D, APPLICATION TO CELLS BASED ON SILICON
A way of exploiting the solar energy is to use cells photovoltaic which convert the energy conveyed by the
incidental radiation in a continuous electric current. This conversation is based on the photovoltaic effect
engendered by the absorption of photons. A part of the absorbed photons generates pairs electron-hole in
which an electric field created in the zone of load of space of a junction p–n.
Thus, the junction p-n, its characteristics, its components and its dimensions are the parameters
responsible of the efficiency and the performances of a solar cell. To study this, we are going to use a very
known software in the mode of the simulation of solar cells, the PC1D, and we are going, at the end, to
draw a conclusion around the ideal parameters that a good solar cell has to have.
DESIGN AND DEVELOPMENT OF WIND TURBINE EMULATOR TO OPERATE WITH 1.5KW INDUCTI...
This paper contributes to design a Wind Emulator coupled to 1.5 kW Induction generator for Wind Energy
Conversion System. A wind turbine emulator (WTE) is important equipment for developing wind energy
conversion systems. It offers a controllable test environment that allows the evaluation and improvement of
control schemes for electric generators that is hard to achieve with an actual wind turbine since the wind
speed varies randomly. In this paper a wind emulator is modelled and simulated using MATLAB.
Verification of the simulation results is done by experimental setup using DC motor-Induction generator
set, LABVIEW and data acquisition card.
EVALUATING MATHEMATICAL HEAT TRANSFER EFFECTIVENESS EQUATIONS USING CFD TECHN...
Mathematical heat transfer equations for finned double pipe heat exchangers based on experimental work
carried out in the 1970s can be programmed in a spreadsheet for repetitive use. Thus avoiding CFD
analysis which can be time consuming and costly. However, it is important that such mathematical
equations be evaluated for their accuracy. This paper uses CFD methods in evaluating the accuracy of
mathematical equations. Several models were created with varying; geometry, flue gas entry temperature,
and flow rates. The analysis should provide designers and manufacturers a judgment on the expected level
of accuracy when using mathematical modelling methodology. This paper simultaneously identifies best
practices in carrying out such CFD analysis.
Co integration Relationship Between Economic Growth, Export and Electricity C...
This study examines the long-run relationship between economic growth, exports, and electricity consumption in Fiji from 1981-2011. It finds:
1) The variables of economic growth, exports, and electricity consumption are cointegrated, indicating they share a common stochastic trend in the long-run.
2) In the long-run, causality runs from electricity consumption and exports to economic growth.
3) In the short-run, deviations from the long-run equilibrium between the variables are corrected at a rate of 22% per year, as shown by the error correction model.
The results suggest that policies aimed at reducing electricity consumption may negatively impact long-run economic growth in Fiji.
Effect of Zn Concentration On Structural and Optical Proprieties Of ZNO Thin ...
This document summarizes research on the effect of zinc nitrate concentration on the structural and optical properties of ZnO thin films deposited by spray pyrolysis. The following key points are made:
1) X-ray diffraction analysis showed the films were polycrystalline with a hexagonal wurtzite structure. Increasing the zinc nitrate concentration improved crystallinity and increased grain size.
2) Atomic force microscopy revealed the grain size increased from 13.3nm to 44.9nm as concentration rose from 0.05M to 0.2M. Surface roughness also increased with concentration.
3) Infrared spectroscopy showed peaks corresponding to O-H and N-H bonds, indicating water and residual
Split Second Analysis Covering High Pressure Gas Flow Dynamics At Pipe Outlet...
A detailed investigation covering piped gas flow characteristics in high pressure flow conditions. Such flow
analysis can be resolved using established mathematical equations known as the Fanno condition, which
usually cover steady state, or final flow conditions. However, in real life, such flow conditions are
transient, varying with time. This paper uses CFD analysis providing a split second “snapshot” at what
happens at the pipe outlet, and therefore, a closer understanding at what happens at the pipe’s outlet in
high pressure gas flow condition.
In this example air was selected for simulation purposes. In HVAC applications, such gas flow conditions
can occur in typical applications such as; air compressors releasing high pressure air through a pipe, or
compressor over pressure refrigerant gas being released into the atmosphere via a discharge pipe.
Investigation has shown that rather than a steady mass flow rate condition occurring at the pipe outlet,
calculated by the Fanno flow condition, a spiked increase in flow rate occurs at the beginning,and then
stabilizing after a few seconds, with relatively minor ripples in flow rate. Other observations were also
made and commented.
CFD results in mass flow rate were compared with the mathematically derived results, differences were
recorded. The CFD analysis showed how the k-omega turbulence model performed well, with the processor
stabilizing at an early stage.
The Force Convection Heat Transfer of A Nanofluid Over A Flat Plate: Using Th...
Advanced Energy: An International Journal (AEIJ) is a quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the Energy Engineering and allied fields. This multi disciplinary journal is devoted to the publication of high quality papers on theoretical and practical aspects of Energy Engineering.
A MODIFIED ANT COLONY ALGORITHM FOR SOLVING THE UNIT COMMITMENT PROBLEM
Solving the unit commitment (UC) problem is one of the most complicated issues in power systems that its
exact solving can be calculated by perfect counting of entire possible compounds of generative units. UC is
equated as a nonlinear optimization with huge size. Purpose of solving this problem is to programming the
optimization of the generative units to minimize the full action cost regarding problem constraints. In this
article, a modified version of ant colony optimization (MACO) is introduced for solving the UC problem in
a power system. ACO algorithm is a powerful optimization method which has the capability of fleeing from
local minimums by performing flexible memory system. The efficiency of proposed method in two power
system containing 4 and 10 generative units is indicated. Comparison of obtained results from the proposed
method with results of the past well-known methods is a proof for suitability of performing the introduced
algorithm in economic input and output of generative units.
Impedance Spectroscopy Analysis of a Liquid Tin Anode Fuel Cell in Voltage Re...
A concept of a liquid tin anode-indirect carbon air fuel cell (LTA-ICFC) are described. Experimental
setups for analysis of LTA-ICFC polarisations of an operational electrochemical reactor of the LTA-ICFC
are presented. Results from Electrochemical Impedance Spectroscopy (EIS) Analysis of the electrochemical
reactor of the LTA-ICFC are shown and analysed.The rate-determining step of the system is concluded.
The charge-transfer resistance did not show considerable differences at 700-800 °C. This can be implied
that the charge-transfer resistance is not the rate-limiting step of the transport processes of the fuel cell.
The increase of the Warburg impedance concurrently with the resistance to fit mass-transport loss (R3)
suggests that the rate-limiting step for the LTA-ICFC in voltage recovery mode is the diffusion of the oxide
ions through SnO2 layer. The increment of mass transport lost, R3, of the cell causes the slowly increase of
the cell’s voltage over the voltage from 0.7-0.8 V at 700, 750, and 800 °C.
Impedance Spectroscopy Analysis of a Liquid Tin Anode Fuel Cell in Voltage Re...
A concept of a liquid tin anode-indirect carbon air fuel cell (LTA-ICFC) are described. Experimental
setups for analysis of LTA-ICFC polarisations of an operational electrochemical reactor of the LTA-ICFC
are presented. Results from Electrochemical Impedance Spectroscopy (EIS) Analysis of the electrochemical
reactor of the LTA-ICFC are shown and analysed.The rate-determining step of the system is concluded.
The charge-transfer resistance did not show considerable differences at 700-800 °C. This can be implied
that the charge-transfer resistance is not the rate-limiting step of the transport processes of the fuel cell.
The increase of the Warburg impedance concurrently with the resistance to fit mass-transport loss (R3)
suggests that the rate-limiting step for the LTA-ICFC in voltage recovery mode is the diffusion of the oxide
ions through SnO2 layer. The increment of mass transport lost, R3, of the cell causes the slowly increase of
the cell’s voltage over the voltage from 0.7-0.8 V at 700, 750, and 800 °C.
Energy Status and Alternative Energy Plans of Major Energy Consumers in South...
Southeast Asia comprises an extraordinarily diverse set of countries with vast differences in the scale and
patterns of energy use and energy resources endowments. Indonesia and Thailand have been selected to be
compared because they are the two largest consumers in energy sector in the region and both countries
still similarly rely on energy imports such as oil. They have been facing challenges in energy policy
reformation distorting energy markets. The combined energy status of Indonesia and Thailand not only
aims at providing policy makers with an understanding of the energy trends and challenges being faced by
the countries up to the next two decades, but also at confidently convincing them the future energy
pathways to unlocking energy efficiency potential and investment. This work contains data and information
on pattern of energy use in the past, present, and future, some economic and political factors that may be
affecting energy demand and supply of Indonesia and Thailand. Key energy issues that need to be
considered are introduced. The potential future energy pathways are included and compared between the
countries. Investment opportunities in each country are also identified.
FEASIBILITY STUDY OF ORKNEY’S WINDFARM DEVELOPMENT FOR SELF-SUFFICIENT FOR ...
In Orkney islands, a number of wind energy projects have been established due to its potential for wind
energy development especially as cluster developments on hilltop and moorland. This Self-sufficient
Orkney Wind Energy (SOWE) project is trying to follow this pattern of development and has designed as a
simple linear development of medium-large scale wind turbines which avoids dominating the landscape,
while providing diversification required for the energy security, along with strong economic benefits to the
local community. The developer completed preliminary designs and landscape assessment, resulting in the
detailed design and the development of 27 wind turbine project for the expectation to generated electricity
of 549.2 GWh annually.
An Engineering Approach for Harvesting Energy from Wind, Wave and Storm
The world is now facing energy scarcity and climate change. In that context, renewable energy is gradually
replacing fossil fuels. However, this source of energy has not been fully exploited. Some natural disasters
bring a lot of energy but are not exploited; in particular, storms are among the heavyweights. In this paper,
I propose a device for harvesting energy from wind, waves and especially storms. One such device is called
a Stormbuoy. If used in practice and deployed on a large scale, the Stormbuoy will harvest significant
amounts of energy from wind, waves and storms. This not only solved the problem of energy scarcity but
also mitigated the destruction of the storm with humans.
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Effect of Zn Concentration On Structural and Optical Proprieties Of ZNO Thin ...
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Split Second Analysis Covering High Pressure Gas Flow Dynamics At Pipe Outlet...
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The Force Convection Heat Transfer of A Nanofluid Over A Flat Plate: Using Th...
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- 1. Advanced Energy: An International Journal (AEIJ) ISSN: 2349 – 6231 http://airccse.com/aeij/index.html Call for Papers Advanced Energy: An International Journal (AEIJ) is a quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the Energy Engineering and allied fields. This multi disciplinary journal is devoted to the publication of high quality papers on theoretical and practical aspects of Energy Engineering. Authors are solicited to contribute to the journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in all areas of Energy Engineering. Topics of Interest include, but are not limited to, the following Data Analysis • Electrical Grids • Energy Management • Energy Storage • Experimental Support • Investments and Production Costs • Materials and Structural Analyses • Mathematical Modeling and Computer Simulations • Power Plant Technologies and Engineering • Regulations, Legislations, Collaboration • Renewable (Green) Energy Systems and Sources (RESSs) • System Safety and Cyber Security Paper Submission Authors are invited to submit papers for this journal through E-mail: aeijjournal@airccse.com. Submissions must be original and should not have been published previously or be under consideration for publication while being evaluated for this Journal. Important Dates Submission Deadline : April 25, 2020 Notification : May 25, 2020 Final Manuscript Due : June 06, 2020 Publication Date : Determined by the Editor-in-Chief For other details please visit http://airccse.com/aeij/index.html Submission Link: https://airccse.com/submission/home.html