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.

Use of Kota Stone Powder to Improve Engineering Properties of Black Cotton Soil

Abstract: Kota city is having major problem of disposing of Kota stone slurry powder. It is a by-product which is obtained during cutting, grinding and polishing operations of locally available Kota stone in stone industries. One of the innovative ground improvement techniques can be practiced by using Kota stone slurry powder (KSSP) as stabilizing agent or admixture. This technique may simultaneously offer the other advantages such as space saving, environmental sustainability and material availability. In the present study, Kota stone slurry powder is used as a stabilizing material for black cotton soil. The cone penetration, shrinkage limit, differential free swell, standard proctor test, UCS test and swell pressure test are conducted on soil and mix specimens to predict and ascertain the behaviour of mix. Results of these experiments conclude that engineering properties of the black cotton soil like shrinkage limit, maximum dry density (MDD), optimum moisture content (OMC) and UCS are improved by mixing Kota stone slurry powder depending on its proportion. With the percentage increase of Kota stone slurry powder, swelling characteristics of expansive soil are also improved such as decrement in the swelling percentage and swelling pressure. UCS decreases beyond 20% of mix.

CFD Simulation Studies on Integrated Approach of Solar Chimney and Borehole Heat Exchanger for Building Space Conditioning

Abstract: In this communication, integrated approach of solar chimney and borehole heat exchanger has been studied by using computational fluid dynamics software It is observed that, the room temperature can be maintained at 25-30 °C, at 49 ACH with this integrated approach in both peak summer and winter conditions The cooling and heating effects are evaluated as 473-555 kW at 40 °C in summer and 827-1056 kW at 5 °C in winter The SC-BHE integrated system approach produced 21-37 % higher heating effect than the BHE alone system In cooling mode SC fitted after the room in fluid circuit and it produces the induce effect for air suction from BHE along the air blower So, integrated approach is a feasible solution for building space conditioning

Analytical channel model for double layer metamaterial-improved magnetic induction communication

Abstract: Magnetic Induction (MI) communication technique may provide promising solution than EM wave-based communication technique for underwater and underground applications where behavior of RF environment is complex, challenging and channel conditions are not constant. The propagation medium is other than air in such applications. MI communication technique overcomes the dynamic channel, propagation loses and antenna size issues of EM wave-based technique. In spite of these benefits, MI communication range is limited due to very fast attenuation of magnetic field with distance. Metamaterial shells are used to reduce the losses and hence improving the communication range. In M2I communication, MI coil antennas are encased by a metamaterial shells, which amplifies the magnetic field around transceivers as a result, range. In this paper, two metamaterial shells are utilized i.e. Double layer Metamaterial-Improved magnetic induction (DM2I) communication but radius of antenna with metamaterial shells is same as in M2I. Comsol Multiphysics, a Finite Element method (FEM) software is used to design and simulation of the analytical channel. The results show that the efficiency is improved in DM2I as compared with M2I.

Position control of brushless DC motor using harmony search algorithm optimization technique

Abstract: In this work the system is Brushless DC (BLDC) Motor. In this motor problem is the position control. Apply conventional controller as PID to control position of BLDC motor. This controller has three parameters K p , K i and K d needs to tune for better performance. Firstly, optimized these parameters using Particle Swarm Optimization (PSO) Technique. In this thesis a novel, powerful optimization tool is the music-inspired harmony based optimization algorithm. The harmony search algorithm has been so far applied to various optimization problems. Additionally, the calculation structure has been altered on a case-by-case premise by tweaking the essential structure. Besides, streamlined these parameters utilizing harmony search algorithm Optimization (HSAO) Technique.

Analysis of Interleaved Coupled Inductor Ultra-Boost Converter for Solar PV Applications

Abstract: Two level interleaved ultra-boost converter (IUBC) with the coupled-inductors with high power and voltage application of solar PV power generation system is introduced in the paper. Two windings coupled-inductors are used for boosting the low input voltage. Performance analysis and modeling of interleaved ultra-boost converter is done by MATLAB/simulation. In this proposed paper converter is modeled and analysed by using analog PI controller and simulated in closed loop. As compared to the conventional boost converters ripple of input current is constrained and stress of current is also reduced. It is mainly designed for low input voltage $(\mathbf{vi}_{\mathbf{n}})$ and high output voltage $(\mathbf{V}_{\mathbf{out}})$ application. Circuit model with input voltage $(\mathbf{V}_{\mathbf{in}})$ of 48V and output voltage $(\mathbf{V}_{\mathbf{out}})$ of 500V with 3KW power is operated and informative simulation and experiment results of IUBC is provided. Main advantage of interleaved ultra-boost converter is to double the efficient ripple frequency and rippled voltage is reduced easily. It increases efficiency, reduces size and improved reliability of the power generation solar PV system.