Rajasthan Technical University

About: Rajasthan Technical University is a education organization based out in Kota, Rajasthan, India. It is known for research contribution in the topics: Photovoltaic system & PID controller. The organization has 716 authors who have published 1084 publications receiving 4530 citations. The organization is also known as: RTU.

Neo Magnet MEMS Electromagnetic Vibration Energy Harvester for Wireless Sensor Nodes

Abstract: Micro-electro mechanical system (MEMS) based on electromagnetic vibration energy harvesters (EM-VEHs) are very ravishing devices in the field of digital world. The main ambition of development of the EM- VEHs is to transformation of circulatory energy in to desired electrical energy. It generates energy through the mechanical vibrations and provides power in to wireless sensor nodes (WSNs) for the imminent internet of things (IOTs). An EM-VEH produces energy and power because of the corresponding motion of the silicon spring between two NdFeB magnets. The electromagnetic energy harvester includes a silicon spring, two miniature NdFeB magnets (one is tuning magnet and other is transducing magnet) and a planner copper micro-coil. In this work the MEMS electromagnetic vibrational energy harvester has been modeled, simulated and it is concluded that a designed structure is able to generate efficient energy density and mechanical stress.

Comparative Study of Earth Air Tunnel and Borehole Heat Exchanger Applied for Building Space Conditioning

Abstract: In this communication, energy and exergy analysis of building-integrated “earth air tunnel heat exchanger” (EATHE) and “borehole heat exchanger” (BHE) has been studied for a composite climate of Delhi. A mathematical model has been developed to predict the energy and exergy of the system. Computational fluid dynamics software has been used to compare the exergetic performance of both the systems. This work is the extension of Kaushik et al. (J Renew Sustain Energy 6(1), 2014 [1]) and Lal et al. (J Renew Sustain Energy 6(2), 023123, 2014 [2]) where economic analysis has been done for both the systems using year-round performance analysis method. It is found that the borehole heat exchanger is more economical in fixed cost and recurring cost and gives improved year-round performance than earth air tunnel heat exchanger.

Numerical Analysis of a Semi-Infinite Solid with Temperature Dependent Thermal Conductivity using Truly Meshfree Method

Abstract: This article presents Meshless Local Petrov-Galerkin (MLPG) method to obtain the numerical solution of linear and non-linear heat conduction in a semi-infinite solid object with specific heat flux. Moving least square approximants are used to approximate the unknown function of temperature T(x) with T h (x). These approximants are constructed by using a linear basis, a weight function and a set of non-constant coefficients. Essential boundary condition is imposed by the penalty function method. A predictor-corrector scheme based on direct substitution iteration has been applied to address the non-linearity and two-level  method for temporal discretization. The accuracy of MLPG method is verified by comparing the results for the simplified versions of the present model with the exact solutions. Once the accuracy of MLPG method is established, the method is further extended to investigate the effects of temperature-dependent properties.

Linear Multivariable System Reduction Using Particle Swarm Optimization and A Comparative Study Using Relative Integral Square Error

Abstract: An algorithm for order reduction of linear multivariable systems has been presented using the combined advantages of the dominant pole retention method and the error minimization by particle swarm optimization technique. The denominator of the reduced order transfer function matrix is obtained by retaining the dominant poles of the original system while the numerator terms of the lower order transfer matrix are determined by minimizing the integral square error in between the transient responses of original and reduced order models using particle swarm optimization technique. The reduction procedure is simple and computer oriented.The proposed algorithm has been applied successfully to the transfer function matrix of a 10 th order two-input two-output linear time invariant model of a practical power system. The performance of the algorithm is tested by comparing the relevant computer simulation results.

Maximum Power Output of DFIG Based WECS Using Improved MPPT Algorithm

Abstract: This paper presents the study of MPPT for DFIG based Power System. To achieve the conversion efficiency high and reduce installation cost of the generating Station we used DFIG due to this we use WRIM in which stator is straightly allied to the grid and rotor fed through back to back with the help of Converters. Firstly, the system simulation model is constructed in MATLAB. In this paper Supreme Power Point is track by the help of the MPPT algorithm. The proposed algorithm pragmatic to the Circuit of Rectified output of the DFIG in which IGBT based Thyristor is connected; Output of the proposed algorithm is fed to the gate Pulse of the IGBT. The MPPT algorithm is control by the help of Perturbe & Observe Controller Technique. Quite a few control specifications may be adjusted to safeguard the quality of control concert. In DFIG based power System rotor and stator side Controller provide the extensive span of Control which is used to achieve wide range of wind speed and this is the advantage of DFIG based power system. The purposed method shows the result which proficient of accurately tracking the optimal operation point for Maximum Power Output.