Sardar Patel College of Engineering

About: Sardar Patel College of Engineering is a based out in . It is known for research contribution in the topics: AC power & Photovoltaic system. The organization has 267 authors who have published 220 publications receiving 1454 citations.

Development of Spring Life Test Apparatus and Life-Cycle Assessment of Extension Springs

Abstract: Life-cycle test of moulded case circuit breakers (MCCB) on mechanical endurance test apparatus exhibited springs as the weak links. Therefore, improvement in the reliability of the circuit breaker mechanism was possible only with an improvement in the life of the springs. To evaluate spring life, a life-cycle test apparatus was developed which subjected springs to actual load conditions as experienced in MCCB. This paper describes the development and working of the test apparatus. The paper also explains how reliability of springs can be estimated using life data provided by the apparatus.

Theoretical Model and Simulations of Different Lengths of Tube for Electromagnetic Forming

Abstract: Electromagnetic forming is an impulse high-speed forming technology using a pulsed magnetic field to apply Lorentz’ forces to workpiece preferably made of a high electrically conductive material without mechanical contact and without a working medium. This technology is used for joining, cutting, shaping and welding of dissimilar metals. Due to tremendously high velocities in comparison to conventional processes, forming restrictions can be extended to several materials. This paper focuses on the effect of varying tube length on magnetic field distribution and displacement. Using simulations by adjusting tube lengths, a variety of different shapes can be obtained. It is essential to examine deformation styles of the workpiece to be capable to forecast the deforming trends of tubes and make advantageous use of electromagnetic forming.

Design, Analysis and Simulation of Six-Pulse Thyristorised Rectifier using Digital Controller

Abstract: The paper represents design considerations and simulation of a digital control system for six pulse thyristorised rectifier. This rectifier is used to power the thermal hydraulic based R&D experimental facilities to simulate the power and temperature transients occurs in nuclear reactor. In order to maintain precisely the predetermined value of DC output power/output current for simulated nuclear fuel channel of experimental facility, an appropriate digital controller has been designed for generating pulses for triggering thyristors. Design calculations for configuring six pulse thyristorised rectifier system has been presented. The simulation of closed loop feedback control mechanism has been performed using circuit simulation software and the simulation results including waveforms have been highlighted in the paper.

Multiresponse maintenance modeling using desirability function and Taguchi methods

Abstract: Successful maintenance work goes a long way in deciding both the life and quality of machine performance. There is a need to satisfy many objectives simultaneously while taking decision regarding the maintenance task. This chapter presents an application involving study of multiple responses simultaneously in optimization of preventive maintenance process using desirability function approach and Taguchi method. The approach is illustrated with a case from a pharmaceutical industry. The input variables studied in this work are number of machines, number of standby machines, crew size and mean time between failure, for optimizing the two responses; equipment utilization and mean time-to-repair. The study resulted in improvement of response values. A regression model is developed by relating input variables with the overall desirability value.

Multi-field Solar Thermal Power Plant with Linear Fresnel Reflector and Solar Power Tower

Abstract: The Linear Fresnel Reflector (LFR) system with direct steam generation (DSG) has lower capital cost owing to flat mirror and less construction requirements. Its optical efficiency, concentration ratio, and maximum temperature reached are lower compared to other concentrated solar technologies. The solar power tower (SPT) with molten salts can reach high temperatures around 590 °C with higher optical efficiency compared to other technologies. But due to high capital costs, commercialization of SPT in India has been limited. Concentrated thermal power plant is cost-intensive and so prior to detailed design, it is important to develop conceptual design considering type and size of solar field, site location, power cycle, working temperature and pressure, energy storage, heat transfer fluid, size of power block and economics of project. In this paper, a multi-field collector system configuration with integrated LFR-DSG and SPT-molten salt is proposed. The objective of this work is to compare multi-field configuration with SPT and LFR system on simple techno-economical parameters - solar multiple, storage capacity, and their levelized cost of electricity (LCOE). The system is evaluated on an hourly basis for a year by means of a simple energy-mass balance code developed in-house. For a 100 MW conceptual multi-field design and 14 h storage backup, the study shows annual energy output of 494 GWh with a capacity factor of 56.44 and LCOE of $0.18 kWh.