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Wind Energy Potential Estimation for Different Regions of Bangladesh
Proma Anwar Khan,
Pobitra Kumar Halder,
Sabbir Rahman
Issue:
Volume 3, Issue 3, May 2014
Pages:
47-52
Received:
7 November 2013
Accepted:
9 May 2014
Published:
20 May 2014
Abstract: This paper deals with the estimation of available wind energy potential in Bangladesh and how it can be utilized. The natural sources of energy are limited. Wind is a very good source of energy in many countries of the world. It is a renewable source of energy that can be used in electricity generation, pumping water and many other sectors. But in our country wind energy extraction is a bit difficult due to low wind speed. In this paper, the available wind energy in Rangamati, Bandarban and Teknaf of our country is calculated both hourly basis. Three stations are analyzed in terms of established parameters like Weibull distribution of wind data, frequency distribution of wind directions over few years using measured data collected from Bangladesh Meteorological Department (BMD). The predictions and calculations of wind potentials are performed for commercial turbine altitudes 50-70 m to overcome the limitations of the weather data obtained by meteorological anemometers at lower heights. This analysis can also show the variation in wind energy in different seasons. It can help us to understand how much energy we have and how much energy can be fruitfully utilized.
Abstract: This paper deals with the estimation of available wind energy potential in Bangladesh and how it can be utilized. The natural sources of energy are limited. Wind is a very good source of energy in many countries of the world. It is a renewable source of energy that can be used in electricity generation, pumping water and many other sectors. But in ...
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Comparison of Organic Solar Cells and Inorganic Solar Cells
Issue:
Volume 3, Issue 3, May 2014
Pages:
53-58
Received:
23 May 2014
Accepted:
29 May 2014
Published:
30 May 2014
Abstract: The fluctuating price of energy, due to a variety of reasons ranging from geo-political constraints to national and international economic issues, and the fact that these energy resources are finite, can be seen as the main incentives to make a transition to a clean energy society. Solar energy is just one of many ways to make this transition a reality, and of the raft of clean energy technologies available, solar energy technology does offer appealing prospects. With the fact that solar energy offers an inexhaustible supply that is literally pollution-free, and coupled to the fact that the planet receives more sunlight in one day than what is required to meet the energy demands of the world for one year, utilizing this resource will undeniably be good for the business community and for the public. While solar energy has been harnessed for centuries, the modern approach has been to construct solar cells and solar module arrays using silicon; with the experience garnered from its use in the semiconductor industry, silicon was a natural choice for use in converting sunlight into usable electricity.
Abstract: The fluctuating price of energy, due to a variety of reasons ranging from geo-political constraints to national and international economic issues, and the fact that these energy resources are finite, can be seen as the main incentives to make a transition to a clean energy society. Solar energy is just one of many ways to make this transition a rea...
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Introduction to Radioactive Materials
Askari Mohammad Bagher,
Mirzaei Vahid,
Mirhabibi Mohsen
Issue:
Volume 3, Issue 3, May 2014
Pages:
59-67
Received:
23 May 2014
Accepted:
29 May 2014
Published:
30 May 2014
Abstract: Radioactivity is a part of nature. Everything is made of atoms. Radioactive atoms are unstable; that is, they have too much energy. When radioactive atoms spontaneously release their extra energy, they are said to decay. All radioactive atoms decay eventually, though they do not all decay at the same rate. After releasing all their excess energy, the atoms become stable and are no longer radioactive. The time required for decay depends upon the type of atom. When the nucleus of a radionuclide spontaneously gives up its extra energy, that energy is called ionizing radiation. Ionizing radiation may take the form of alpha particles, beta particles, or gamma rays.
Abstract: Radioactivity is a part of nature. Everything is made of atoms. Radioactive atoms are unstable; that is, they have too much energy. When radioactive atoms spontaneously release their extra energy, they are said to decay. All radioactive atoms decay eventually, though they do not all decay at the same rate. After releasing all their excess energy, t...
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Numerical Analysis of a Three Dimensional Fluid Flow in a Flat Plate Solar Collector
Amraoui. M. A.,
Aliane. K.
Issue:
Volume 3, Issue 3, May 2014
Pages:
68-75
Received:
15 May 2014
Accepted:
6 June 2014
Published:
20 June 2014
Abstract: Flat plate solar collectors are the most common thermal collectors used among the various solar collectors for domestic and industrial purposes. The objective of this study is to perform computational fluid dynamics (CFD) simulation of flat plate collector with air flow. In this paper, the CFD tool has been used to simulate the solar collector for better understanding of its heat transfer capability. Using a 3D model of the collector involving air inlet, the collector is modeled by ANSYS Workbench and the grid was created in ANSYS ICEM. The results were obtained by using ANSYS FLUENT. The objective of this work is to compare theoretical and experimental achieved work toward the given work by using CFD tool with respect to flow and temperature distribution inside the solar collector. The outlet temperature of air was compared with experimental results and there was a good agreement between them.
Abstract: Flat plate solar collectors are the most common thermal collectors used among the various solar collectors for domestic and industrial purposes. The objective of this study is to perform computational fluid dynamics (CFD) simulation of flat plate collector with air flow. In this paper, the CFD tool has been used to simulate the solar collector for ...
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