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.

Optimal design of PID controller for an AVR system using monarch butterfly optimization

Abstract: In this paper, Monarch Butterfly Optimization Algorithm (MBO) based on migration behavior has been proposed to find best optimal values of PID parameters for the AVR system This paper describes in detail how to apply the MBO algorithm for proper tuning of the PID controller parameters with objective function as Integral Square Error (ISE) In the simulation results, step response of proposed AVR system compared with Particle Swarm Optimization (PSO), Many Optimizing Liaisons (MOL), Chaotic PSO (CPSO), Chaotic Ant Swarm (CAS), optimization techniques in terms of settling time and peak amplitude and also check the performance indices in terms of ITAE, IAE, ISE functions

Flow boiling heat transfer analysis of Al2O3 and TiO2 nanofluids in horizontal tube using artificial neural network (ANN)

Abstract: A nanofluid is a suspension of nanometer-sized particles in a base fluid. In the last decade, flow boiling of nanofluid has gained much attention. However, only a few correlations on flow boiling are available. In this paper, an experimental study for HTC (heat transfer coefficient) of water-based TiO2 and Al2O3 nanofluids flowing in an annulus has been carried out at 1 bar. The volumetric concentration of the nanofluid was varied from 0.05 to 0.20%, and heat flux and the mass flux were varied from 6.25 to 143.2 kW m−2 and 338 to 1014 kg m−2 s−1, respectively. It was observed that HTC for both the nanofluids was greater than that of the base fluid water, and it increased with increase in the concentration of the nanoparticles, the heat flux and the mass flux. The highest HTC was obtained for Al2O3 nanofluid at 0.20% concentration for the heat flux of 143.2 kW m−2 and mass flux of 1014 kg m−2 s−1. It was found that nanofluid made from Al2O3 nanoparticles had better HTC than nanofluid made from TiO2 nanoparticles. The HTC ratios, i.e., the ratio of HTC of the nanofluid to the HTC of the base fluid, also increased with the increase in concentration, heat flux and mass flux. In the later part of the paper, new correlations were developed for predicting HTC for TiO2 and Al2O3 nanofluids. Finally, an ANN model was developed to predict the heat transfer coefficient. Experimental values were found to be in good agreement with ANN predictions.

Design of frequency reconfigurable microstrip patch antenna for S-Band and C-Band applications

Abstract: This paper presents a technique of microstrip patch antenna for S-band and C-band applications. In this proposed work the frequency reconfigurable microstrip patch antenna with three slots on the ground is proposed. In this there are two switches (copper strip) are placed on the slot at the ground plane to produce three different frequency bands at 3.06, 3.26 for (S-Band) and 4.27 GHz(C-Band) respectively. The proposed antenna is simulated using FR-4 substrate with permittivity 4.1 and substrate thickness 1.5mm. The simulation of the proposed work is conducted with CST. The simulation result shows good directional radiation pattern and the directivity. The simulation result are indicating that the proposed antenna has good impedance matching at every band.