SDM College of Engineering and Technology

About: SDM College of Engineering and Technology is a based out in . It is known for research contribution in the topics: Diesel fuel & Combustion. The organization has 350 authors who have published 351 publications receiving 2399 citations.

Operation and performance of grid connected proton exchange membrane fuel cell with ultra capacitor

Abstract: Ever increasing energy demand lead to the power generation by using renewable Energy Sources. Fuel cells are new source of energy that converts chemical energy to electrical energy with high efficiency, low noise and negligible emission. Out of different types of fuel cells, proton exchange membrane fuel cell (PEMFC) is commonly used because of its advantages like low operating temperature, fast start up, zero gas emission and long cell and stack life. The proposed work focuses grid synchronized PEMFC with electrolyser and ultra-capacitor. The model is developed and simulated in the Matlab/Simulink environment. To overcome the slow thermodynamic response of the fuel cell to load variations, ultra-capacitor is connected. The DC low voltage output of the PEMFC is boosted and inverted using PWM technique to have grid interaction. The system also incorporates a PI controller to regulate the inverter output at desired level of grid voltage and grid frequency. The simulation results validate the presence of ultra-capacitor (UC) with PEMFC and demonstrate the mitigation of load transients.

Efficient FPGA architecture of optimized Haar wavelet transform for image and video processing applications

Abstract: Discrete Wavelet Transform (DWT) is widely used in digital image and video processing due to its various advantages over other similar transform techniques. In this paper, efficient hardware architecture of Optimized Haar Wavelet Transform is proposed which is modeled using Optimized Kogge–Stone Adder/Subtractor, Optimized Controller, Buffer, Shifter and D_FF blocks. The existing Kogge–Stone Adder architecture is optimized by using Modified Carry Correction block which uses parallel architecture to reduce the computational delay. Similarly, the Controller block is optimized by using Clock Dividers and Reset Counter interdependently. To preserve the accuracy of the processed data, suitable size of intermediate bits in fractional format with the help of Q-notation is considered. The comparison results show that the proposed architecture performs better than existing ones concerning both hardware utilization and data accuracy.

Glass/epoxy fiber orientation effects on translaminar fracture toughness under Mixed mode(I/II) load using FPB specimen

Abstract: To study glass/epoxy fiber orientation effects on translaminar fracture toughness under Mixed mode(I/II) load using asymmetric Four Point Bend specimen. Fracture toughness values for different fiber-oriented glass/epoxy laminates under Mixed modes are compared with unidirectional glass/epoxy laminates. Specimens were fabricated using hand layup technique with (0/45)° and (0/90)° fiber oriented glass fiber. The experimental study was conducted for 6 crack positions varying from 0 to 1 with an increment of 0.2 for Four Point Bend specimen. The specimens were tested under universal testing machine to obtain peak loads and further evaluate fracture toughness. The experimental test results show fracture toughness can be increased by orienting the fiber in the laminate. Fracture toughness is highly dominating for (0/90)° fiber-oriented laminates compared to 0° and (0/45)° glass/epoxy laminates.

Control and operation of grid connected DC source based distributed generation

Abstract: Grid connected operation of Distributed generation (DG) is yet another approach to provide reliable and secured power. The operational issues of grid connected DG is the focus of research at present to achieve adequacy and security. The islanding is the situation where DG continues to operate with the utility disconnected. It is customary to detect islanding when it occurs to ensure continued stable operation along with safety of linemen and the customers' equipment. This paper deals with the DC source based DG integrated with the utility and operates in grid connected and intentional islanding mode. Passive islanding detection technique is used to detect the islanding. The DG operates at grid voltage and frequency. Intentional islanding is tested by developing the model for seamless operation using MATLAB/Simulink environment and results are obtained. The simulation results validate the effective operation of the proposed controller and power electronic devices.