http://dspace.ewubd.edu:8080/handle/123456789/1024 2026-04-04T15:04:22Z 2026-04-04T15:04:22Z Afrad, Nusrat Jahan Sutradhar, Rajib Chandra http://dspace.ewubd.edu:8080/handle/123456789/1585 2019-03-13T07:45:03Z 0012-01-01T00:00:00Z

Study of the Efficiency of Different Types of Solar Cells Afrad, Nusrat Jahan; Sutradhar, Rajib Chandra Solar energy, radiant light and heat from the sun, have been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar energy technologies include solar heating, solar photovoltaics, concentrated solar power and solar architecture, which can make considerable contributions to solving some of the most urgent problems the world now faces. The International Energy Agency projected that solar power could provide "a third of the global final energy demand after 2060, while CO2 emissions would be reduced to very low levels." Nowadays the world energy demands around500 exajoule. In 2050, the demand will be around 1000 exajoule. From fossil fuel we may have got almost 85%. Rest of the world demand may be mitigated from alternative energy sources like Solar, Coal, Oil, Natural Gas, Biomass, Geothermal, and even the wind and hydropower. Most of the power generated nowadays is produced using fossil fuels, which emit tons of carbon dioxide and other pollution every second. More importantly, fossil fuel will eventually run out. In order to make the development of our civilization sustainable people are looking for new source of substitute clean energy. Of them solar energy is the potential alternative cause less harm to our environment, carbon emission in the environment is zero, low initial cost, solar systems performance more efficient, economical and stable. Moreover, solar cells are a promising renewable, carbon-free electric energy resource to address the fossil fuel shortage and global warming. In this work,we tried to make a brief review and present status of solar cell conversion efficiency, material usually used for fabrication and different solar cell technology on the most promising routes to realize cheap and efficient solar cells. It is found that the a:Si solar cells have a highest efficiency of approximately 25% in laboratory and 15% in industry, compound semiconductor solar cells have an efficiency of 28.8% (GaAs) and thin film solar cells have an efficiency of 19.6% (CdTe), and HIT solar cells have an efficiency of 22.3%. This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics and Telecommunication Engineering of East West University, Dhaka, Bangladesh

0012-01-01T00:00:00Z Afroz, Selina Choudhury, Maha http://dspace.ewubd.edu:8080/handle/123456789/1328 2019-03-13T07:45:03Z 0012-01-01T00:00:00Z

First Aid-An Android Application Afroz, Selina; Choudhury, Maha My task was to design and implement an android application that would enable users to interact as a guide. The dedicated application supports IOS and android all version .The significant part was dedicated for designing and implementing a restful API which constitutes communication protocol between client application and the web service. First Aid application takes advantage of many solutions and techniques for the android platform. It has been optimized according to the practices recommended by Google in order to increase user experience and reduce power consumption. The application is design in such a way that provides medical services to mass people with a platform for instant, Personalized. This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics and Telecommunication Engineering of East West University, Dhaka, Bangladesh

0012-01-01T00:00:00Z Nupur, Nahida Islam http://dspace.ewubd.edu:8080/handle/123456789/1316 2019-03-13T07:45:03Z 0012-01-01T00:00:00Z

Diabetics Guide- An Android Application Project Nupur, Nahida Islam My task was to design and implement an android application that would enable users to interact as a guide. The dedicated application supports OS version from Ice-cream sandwich 4.0 onwards. The significant part was dedicated for designing and implementing a restful API which constitutes communication protocol between client application and the web service. Diabetics Guide application take advantage of many solutions and techniques for the android platform. It has been optimized according to the practices recommended by Google in order to increase user experience and reduce power consumption. The application is design in such a way that provides mass people awareness of their health. This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics and Telecommunication Engineering of East West University, Dhaka, Bangladesh

0012-01-01T00:00:00Z Anzir, Mahmud Lemon, Md. Majadul Islam http://dspace.ewubd.edu:8080/handle/123456789/1314 2019-03-13T07:45:03Z 0012-01-01T00:00:00Z

Project Development and Performance Study of a Microcontroller-Based Solar Radiation Measuring System Anzir, Mahmud; Lemon, Md. Majadul Islam Measurement of solar radiation is essential for determining the viability of a solar system in a particular place. The conventional measuring system embraces some instruments which are very costly. The target of this project is to develop and study the performance of a microcontroller based solar radiation measuring system with locally available low cost components. In this project, ARDUINO UNO has been used as microcontroller and the source code has been written in arduino software by using arduino C programming. As the sensor of the system a tiny solar cell has been used. The cell converts the solar radiation into current. A current to voltage converter (C-V) has been used to get voltage for the micro controller. The output voltage of the C-V unit is converted into digital value and then displayed in LCD. We have also applied our own logical policy and used some vital instruments to reach the destination of this project. The system has been calibrated using a standard pyranometer. Using the system we have measured the radiation for some days. The entire practical outcomes are presented in this report. This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics and Telecommunication Engineering of East West University, Dhaka, Bangladesh

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