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Institution

Chittagong University of Engineering & Technology

EducationChittagong, Bangladesh
About: Chittagong University of Engineering & Technology is a education organization based out in Chittagong, Bangladesh. It is known for research contribution in the topics: Renewable energy & Dielectric. The organization has 1200 authors who have published 1444 publications receiving 10418 citations. The organization is also known as: Engineering College, Chittagong & Bangladesh Institute of Technology, Chittagong.


Papers
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Proceedings ArticleDOI
18 Dec 2014
TL;DR: A protocol has been researched to transfer data between computers by using IR technology and an apparatus also has been developed according to the protocol and MATLAB is used to manipulate data in a computer and transfers the data via serial port to the microcontroller of the apparatus.
Abstract: Infrared (IR) technology is widely adopted and dominantly used for wireless communication. Relatively low distance communication system can be furnished by using IR communication as it is cheaper than widely used Bluetooth and Wi-Fi communication. A protocol has been researched to transfer data between computers by using IR technology and an apparatus also has been developed according to the protocol. MATLAB is used to manipulate data in a computer and transfers the data via serial port to the microcontroller of the apparatus. Mathematical and logical operations are performed in the controller according to programmed instructions in order to send the data as a signal of IR light beam which modulates at a frequency of 38 kHz. An IR receiver picks up the signal and the receiving module converts the modulated light beam to corresponding electric signal which is decoded & defragmented by an another microcontroller to generate corresponding data. Then the accrued data is sent to another computer through serial port where it is received by MATLAB. This apparatus works perfectly within 8 meters with viewing angle between 15 to 30 degrees. Keywords—infrared, wireless communication, MATLAB, data

4 citations

Proceedings ArticleDOI
TL;DR: In this paper, numerical simulations were conducted with novel promising InGaN compound material by utilizing AMPS simulator to explore the possibility of higher efficiency of the multi-junction tandem solar cell.
Abstract: Multijunction tandem solar cells from compound materials are highly attractive for higher cell efficiency need to be applied in space applications In this work, numerical simulations were conducted with novel promising InGaN compound material by utilizing AMPS simulator to explore the possibility of higher efficiency of the multi-junction tandem solar cell This simulation was done with the different ratio of In and Ga content to investigate the optimum band gap combinations of tandem solar cells, and it has been found that the maximum conversion efficiency of the triple junction tandem solar cell is 4234% (Voc =133V, Jsc=3615mA/cm2, and FF =088) with this InGaN compound material Finally, the stability of the designed cell has been investigated and found that the temperature coefficient (TC) of the proposed cell is -004%/°C which indicates the higher stability of the cell in stressed condition

4 citations

Proceedings ArticleDOI
18 May 2012
TL;DR: In this paper, a series of polycrystalline spinel ferrites with composition Ni 0.27 Cu 0.10 Zn 0.63 Al x Fe 2−x O 4 for x values ranging from 0.00 to 0.16 in steps of 0.04 and sintered at 1300°C have been prepared and investigated by the standard double sintering ceramic technique.
Abstract: A series of polycrystalline spinel ferrites with composition Ni 0.27 Cu 0.10 Zn 0.63 Al x Fe 2−x O 4 for x values ranging from 0.00 to 0.16 in steps of 0.04 and sintered at 1300°C have been prepared and investigated by the standard double sintering ceramic technique. The effect of Al-ion substitution on the AC electrical resistivity and dielectric properties at different frequencies from 100 Hz up to 120MHz was studied. The AC resistivity results were discussed in terms of the electron hopping model. The dispersion of the dielectric constant was discussed in the light of Koop's phenomenological theory and Maxwell-Wagner interfacial polarization. The dielectric loss tangent exhibit dielectric relaxation peaks which are attributed to the coincidence of the hopping frequency of the charge carriers with that of the external fields. All the variations are explained on the basis of Cu2+ and Cu+; Ni2+ and Ni3+; Fe2+ and Fe3+ concentrations on octahedral sites and electronic hopping frequency between Fe2+ and Fe3+ ions and hole transfer between Cu2+ and Cu+; Ni2+ and Ni3+ over octahedral site.

4 citations

Proceedings ArticleDOI
29 May 2014
TL;DR: The geothermal energy is a great opportunity for eliminating this electricity shortage in Bangladesh as mentioned in this paper, and the geothermal gradient at south-east region varies from 19.8 to 29.5°C/km along the northwest 20.8-48.7°C /km.
Abstract: A serious supply shortage of electricity has created in Bangladesh because electricity generation capacity didn't increase proportionately to the demand; there exist 6000 MW maximum electricity shortage during hot summer days and also in the harvesting and irrigation season. Besides to generate power environment is being deteriorated more and more globally. In this circumstances there is no alternative of renewable energy and Bangladesh have a great opportunity to generate electricity from geothermal energy to overcome this power crisis. North-east region of this country is suitable for planting geothermal power plant. The geothermal gradient at south-east region varies from 19.8 to 29.5°C/km along the northwest 20.8 to 48.7°C/km. We may have 110–153°C at a distance of 3–4 kilometres inside from the earth surface at the north-west. So the geothermal energy is a great opportunity for eliminating this electricity shortage.

4 citations

Proceedings ArticleDOI
03 May 2019
TL;DR: In this article, the numerical model and simulation of efficient CZTS based thin-film solar cell was used for simulation of (Al:ZnO/i-ZnNO/CdS/CZTS/Mo)structured solar cell and the effects of different layer properties on cell performance parameters were analyzed.
Abstract: The Copper Zinc Tin Sulfide (CZTS) is considered as one of the promising semiconductor materials in Kesterite family for potential solar cells absorber material. This work focuses on the numerical model and simulation of efficient CZTS based thin-film solar cell. Popular thin-film solar cell simulator wxAMPS was used for simulation of (Al:ZnO/i-ZnO/CdS/CZTS/Mo)structured solar cell and the effects of different layer properties on cell performance parameters were analyzed. An optimized cell with 15.84% (%FF=72.86, Voc=0.78Volt and Jsc=27.98 mA/cm2) energy conversion efficiency has proposed. The temperature coefficient (TC) of 0.02%/○C had shown the higher stability of the proposed cell. All of the simulated results had encouraged towards fabrication of high performance thin-film CZTS solar cells.

4 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20234
202240
2021243
2020241
2019228
2018119