Design and Fabrication of Runner Blades of Cross Flow Turbine

This paper describes the design and fabrication of runner blades for cross flow turbine is presented. In this paper, the cross flow turbine's runner is designed to produce 100 W electric powers from head of 4 m and the flow rate of 0.004 m ^3 s. For the given capacity and head of the turbine, the dimensions of runner diameter and width 265 mm and 132 mm is obtained respectively. The detail design calculation of the runner is described in this thesis. It is applicable to wide range of flow rate adjusting the runner length. The term hydropower refers to shaft power generated by converting potential and kinetic energy of power. By using water power, the generation of electrical power is well known and widely used throughout the world. In hydropower plant, water turbine is one of the most important parts for generating electricity. This paper is to fulfill the required electricity in rural area. 

by Ma Thu Zar Win | Ma Myat Win Khaing | Ma Yi Yi Khin "Design and Fabrication of Runner Blades of Cross-Flow Turbine"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5, August 2019,

URL: https://www.ijtsrd.com/papers/ijtsrd27990.pdf 

Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/27990/design-and-fabrication-of-runner-blades-of-cross-flow-turbine/ma-thu-zar-win

call for paper Aerospace Engineering, international journal Chassis Engineering, ugc approved journals for engineering

Designing Class a Colpitts Oscillator and Analyzing the Effect of DC Power Supply on its Frequency Stability

Oscillator circuit is one that converts DC power into AC power at a frequency without any input signal. Oscillators are commonly used in communication systems to generate carrier frequency ranging from audio frequency 20 Hz to radio frequency 100G Hz. There are two main classes of oscillators, harmonic oscillator with sinusoidal output e.g. sine wave and relaxation oscillator with non sinusoidal output e.g. square wave, triangle wave, etc.. In this paper, class A Colpitts oscillator with LC feedback circuit is designed as a radio frequency oscillator to generate the output signals at 5M Hz. After designing, this circuit is simulated with Multisim software to analyze the effect of power supply on its frequency stability. Three supply voltages, 14 V, 12 V and 10 V are set as sample parameters to analyze the variation of frequency and voltage of the output signal. Changing DC power supply one by one as the above selected parameters in Multisim, the change of value of frequencies are noted and output signal results are also shown with the help of virtual oscillator. 

by Thit Waso Khine "Designing Class a Colpitts Oscillator and Analyzing the Effect of DC Power Supply on its Frequency Stability"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5, August 2019,

URL: https://www.ijtsrd.com/papers/ijtsrd28022.pdf 

Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/28022/designing-class-a-colpitts-oscillator-and-analyzing-the-effect-of-dc-power-supply-on-its-frequency-stability/thit-waso-khine

call for paper Agricultural Engineering, international journal Chemical Engineering, ugc approved journals for engineering

Preparation of Bioethanol from Brown Seaweed Sargassum Sp.

In this study, brown seaweed Sargassum sp. was used to produce bioethanol by using enzymatic liquefaction and saccharification method. Bioethanol from brown seaweed Sargassum sp. was more commercial than using any other starch based raw materials because it can be easily collected on Chaung Tha beach in Myanmar without any impact on environment. In this regard, the productivity of bioethanol from brown seaweed Sargassum sp. was determined by separate hydrolysis and fermentation SHF with yeasts. Two types of yeasts were used. Saccharomyces cerevisiae was used for glucose fermentation in brown seaweed and selected nitrogen fixing yeast isolate N3,N18,N24 were used for mannitol fermentation which consist plenty in brown seaweed. The effects of enzymatic liquefaction, enzymatic saccharification and fermentation on this sample were studied. From the fermentation studies, brown seaweed Sargassum sp. gave the ethanol percent by weight of 2.56 using Saccharomyces cerevisiae only and 4.1 by using mixture of yeast Saccharomyces cerevisiae and selected nitrogen fixing yeast isolate. The maximum yield of crude ethanol was 32.5 by fermentating yeast mixture of Saccharomyces cerevisiae and nitrogen fixing yeast isolate. When it was fermented by just only Saccharomyces cerevisiae, yield of crude ethanol percent was 20.3. 

by Nway Mon Mon Oo | Tint Tint Kywe "Preparation of Bioethanol from Brown Seaweed (Sargassum Sp.)"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5, August 2019,

URL: https://www.ijtsrd.com/papers/ijtsrd28011.pdf 

Paper URL: https://www.ijtsrd.com/engineering/chemical-engineering/28011/preparation-of-bioethanol-from-brown-seaweed-sargassum-sp/nway-mon-mon-oo

call for paper Computer Engineering, international journal Mechanical Engineering, ugc approved journals for engineering

Design of Low Head Hydrokinetic Turbine

Vertical axis Darrieus water turbine, very suitable for use in river flow in the utilization of the kinetic energy. Darrieus H type hydrokinetic turbines are electromechanical energy converters that generate electricity from harness kinetic energy of flowing water to generate electricity. The design water speed is 1.5m s, tip speed ratio 4 and the final power output is designed to be 100W through water turbine. The designed water turbine has 3 blades. Electricity is generated by using Darrieus H type hydrokinetic turbine. Blade design is made of fiber and the chord length of 0.0742m. The diameter and the height of turbine are 0.354m and 0.531m with two circular end plates. Steel shaft has 7.85mm in diameter. Hydrofoil NACA 0018 is chosen based on max CL CD ratio at angle of attack 10'. The design hydrokinetic turbine can be used for pico hydro generation in rural communities non connected to electricity. This research can provide to generate the electricity Darrieus hydrokinetic Turbine with low cost and local materials. 

by Ei Ei Mon "Design of Low Head Hydrokinetic Turbine"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5, August 2019,

URL: https://www.ijtsrd.com/papers/ijtsrd27865.pdf

Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/27865/design-of-low-head-hydrokinetic-turbine/ei-ei-mon

call for paper Gas Engineering, international journal Geological Engineering, ugc approved journals for engineering

Text Embedded System using LSB Method

An important topic in the exchange of confidential messages over the internet is the security of information conveyance. For instance, the producers and consumers of digital products are keen to know that their products are authentic and can be differentiated from those that are invalid. The science of encryption is the art of embedding data in audio files, images, videos or content in a way that would meet the above security needs. Steganography is a branch of data hiding science which aims to reach a describe level of security in the exchange of private military and commercial data which is not clear. This system is proposed to hide the text information files within the image based on the LSB method in order to meet security requirement such as confidential and integrity. The least significant bit is the bit which is farthest to the right and holds the least value in a multi bit binary number. This system is implemented by using C programming. 

by Win Win Maw | San San Lwin "Text Embedded System using LSB Method"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5, August 2019,

URL: https://www.ijtsrd.com/papers/ijtsrd26696.pdf 

Paper URL: https://www.ijtsrd.com/engineering/information-technology/26696/text-embedded-system-using-lsb-method/win-win-maw

call for paper Petroleum Engineering, international journal Telecommunications, ugc approved journals for engineering

Speed Control System of Induction Motor by using Vector Control Method

In the Vector Control method of induction motors, one of the advantages of the separately excited DC motor of being able to decouple the flux control and the torque is thereby opened up. The field orientation control of induction motor allows decoupling the control of magnetic flux and the control of the torque produced by the stator current. To drive three phase squirrel cage induction motor with a constant speed, vector control technique is used. In this paper, the development of speed control system for three phase squirrel cage induction motor using a vector control method is presented and simulation for proposed system is done with the help of MATLAB SIMULINK. 

by Soe Sandar Aung | Thet Naing Htun "Speed Control System of Induction Motor by using Vector Control Method"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5, August 2019,

URL: https://www.ijtsrd.com/papers/ijtsrd27914.pdf 

Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/27914/speed-control-system-of-induction-motor-by-using-vector-control-method/soe-sandar-aung

call for paper Petroleum Engineering, international journal Telecommunications, ugc approved journals for engineering

Speed Control System for BLDC Motor by using Direct Back EMF Detection Mathod

BLDC motors are used in many industrial and traction applications due to high efficiency, low maintenance and high torque. For good performance of BLDC motors, the accurate knowledge of the rotor position is required. The need for the rotor position information in BLDC motors have been satisfied by use of some form of rotor position sensors. But to reduce cost, complexity and also to improve reliability of the system, sensor less drive system is preferred. In this paper, the development of sensor less control system for BLDC motor using a direct back EMF detection method is presented and simulation for proposed system is done with the help of MATLAB SIMULINK. 

by Soe Sandar Aung | Thet Naing Htun "Speed Control System for BLDC Motor by using Direct Back EMF Detection Mathod"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019,

URL: https://www.ijtsrd.com/papers/ijtsrd26624.pdf 

Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/26624/speed-control-system-for-bldc-motor-by-using-direct-back-emf-detection-mathod/soe-sandar-aung

call for paper Telecommunications, international journal Information Technology, ugc approved journals for engineering