IJATSER Volume 1 – Issue 2, November 2015 Edition
All listed papers are published after full consent of respective author or co-author(s).
For any discussion on research subject or research matter, the reader should directly contact to undersigned authors.
01-NOV15 Speed Control Of An Induction Motor By Using Indirect Vector Control Method (Page No. 1-6)
AUTHORS : Nishank Gupta, Vikas kumar
Abstract- In this paper we have developed a model in which the speed of an induction motor will be controlled by the Vector Control or we can say by the PWM pulse generator. PWM Pulse modulator has been implemented in this model to generate the pulse which will be fed into the MOSFET inverter, PWM modulator is controlled by the FUZZY LOGIC Controller which will control the frequency of the pulse toggling. Pulse generated from the vector control block will go to the MOSFET Inverter which will convert the DC Voltage supplied to it into a AC Voltage source and its frequency will depend upon the pulse frequency generated by the vector control block or PWM Pulse Modulator. On the generation of the AC Voltage it will fed into the induction motor and hence it will ignite the motor. To start an Induction motor it is important to induce an initial current into it so that the coils will repel each other and hence the motor will start, however as the time elapses the motor starts rising or we can say it will gain more speed, MOSFET Inverter allows the motor to achieve higher speed in comparison to the IGBT Inverter which not only uses more power but also fails to cope up with the FUZZY LOGIC controlled vector controlled pulse. The motor flux is controlled by the direct-axis current reference id*. Block DQ-ABC is used to convert id* and ie* into three phase current references ip*, iq*, and ir* for the current regulator. Current and Voltage Measurement blocks provide signals for visualization purpose. Motor current, speed, and torque signals are available at the output of the ‘Asynchronous Machine’ block. Torque control management system has also been included in this model to keep the motor stable and vibrations free at the higher speed. It is also controlled by the FUZZY LOGIC controller to enhance the system capabilities and to make it more responsive and reliable.
02-NOV15 MODIFIED PSO USED FOR THE SOLUTION OF ECONOMIC LOAD DISPATCH PROBLEM(Page No. 7-13)
AUTHORS : Prachi Deshpande and Rohit Gupta
Abstract: Economic load dispatch is the process of allocating available generating units in such a way to satisfied the load demand and fulfill the constraints so that the total fuel cost is minimized. Particle swarm optimization is a population- based optimization technique that can be applied to a wide range of problems. This paper used a novel PSO called Time Varying Acceleration coefficients PSO, which has the ability to explore the particles in the search spaces more effectively and increases their convergence rates. In this paper the power and usefulness of the TVAC-PSO algorithm is demonstrated through its application for six generator systems with constraints.
03-NOV15 Optimum percentage of steel fiber chip in grade concrete(Page No. 13-26)
AUTHORS : PROF. PRAVEEN TOMAR ,ASLAM HUSSAIN , SOURABH JAIN
Abstract- This paper work describes the experimental study of fiber reinforced concrete with M-25 & M-30 grade concrete in addition of steel fiber chip with different dosages. To over-come the difficulties due to optimum percentage of fiber for maximum strength in concrete & high performance concrete. The main objective of this paper work is to investigate the optimum percentage of steel fiber chip on M-25 and M-30 grade concrete and develop a high performance concrete. It is proposed to determine and compare compressive strength, split tensile strength, flexural strength & slump test of concrete grade M25 & M30 having different percentage of steel fiber chip (0%, 0.5%,1.0%,1.5%,2.0%). Compressive strength, split tensile strength, flexural strength increases up to 1.5% steel fiber chip then it was decreased of both concrete grade in case of 2.0%were used. The chemical admixture is used to increase the workability of concrete. The experimental investigation is carried out on a total no of 90 specimen of compressive strength, 10 specimens for split tensile strength & flexural strength each.
Key words-steel fiber, compressive strength. Split tensile strength. Slump value
04-NOV15 OPTIMIZATION OF SHELL AND TUBE HEAT EXCHANGER
Authors – Abhishek Arya , Dangar Sunilbhai Dhanjibhai
ABSTRACT – A heat exchanger is a device, which transfer internal thermal energy between two or more fluids at different temperature. Without this essential piece of equipment most industrial process would be impossible. Heat exchangers are widely used in refrigeration air conditioning, and chemical plants. They can be employed in various uses, for instance, to effectively transmit heat from one fluid to the other. Shell-and-tube heat exchangers (STHXs) are widely applied in various industrial fields such as petroleum refining, power generation and chemical process, etc. Tremendous efforts have been made to improve the performances on the tube side.
In this project experimental performance is done on the fixed designed STHX and calculate the heat transfer coefficient and effectiveness. Validation is to be carried out using which gives the result comparison with that of experimental result. Here flow parameters are not varied but size and number of tubes are varied and best efficient model is selected as Optimized value. 3 different number of tubes are used with same shell size remaining same. 40 tubes , 32 tubes and 36 tubes were tried . It’s been observed for same input temperatures and mass flow rates for three different models one with 36 tubes , 32 tubes model &other with 40 tubes, the temperature variation in 36 tubes is more and also requires less tubes compared to 40 tube model. so it is more effective than tubes model.