P A College of Engineering

About: P A College of Engineering is a based out in . It is known for research contribution in the topics: Dihedral angle & Ring (chemistry). The organization has 298 authors who have published 594 publications receiving 4888 citations.

Effect of parameters on thermal and fluid-flow behavior of battery thermal management system

Abstract: In modern electric vehicles the thermal stability problems associated with Lithium-ion battery system is of major concern. Proper battery thermal management systems is required to ensure safety and efficient performance of battery cells. A realistic conjugate heat transfer and fluid-flow analysis of Lithium-ion prismatic battery cell is performed. The flow of air as coolant, is laminar, flowing between the heat generating battery cells. The effect of few important working parameters like volumetric heat generation, Sq, conduction-convection parameter, ζcc, Reynolds number, aspect ratio, Ar, and spacing between the cells, Wf, is investigated in this work. For the wide range of parameters considered, the temperature variations in battery cell and coolant is carried out. Focusing mainly on effect of Reynolds number and Wf, behavior of local Nusselt number, local friction coefficient, Cf,x, average Nusselt number, average friction coefficient, Cf,avg, maximum temperature, mean fluid temperature, heat removed from the lateral surface of cell are discussed. Average Nusselt number increased with increase in Reynolds number but decreased with increase in Wf, whereas Cf,avg decreased with increase in Reynolds number and Wf. It is also found that their exists an upper and lower limit on Reynolds number and Wf above and below which the change in Cf, avg and average Nusselt number is negligible. Maximum temperature is significantly influenced at low Reynolds number and for all Wf. From the lateral surface of battery over which the coolant flows, more than 96% of heat generated in cell is removed.

Synthesis and Antimicrobial Study of New 8-bromo-1,3-diaryl-2,3-dihydro-1H-naphtho[1,2e][1,3]oxazines

Abstract: A series of new 8-bromo-1,3-diaryl-2,3-dihydro-1H-naphth[1,2e][1,3]oxazines 2a-n are synthesized. 6-Bromonaphthol undergoes ring closure reaction with substituted aryl and heteroarylaldehydes to give naphthoxazine derivatives. Some of these are hydrolyzed to obtain aminobenzylnaphthols 3c,l which are further condensed with different aryl/heteroaldehydes to yield 4a-e. The structures of newly synthesized compounds are confirmed through elemental analysis, spectral studies and single crystal X-ray study. Compounds are screened for their antibacterial and antifungal activity. Some of them exhibited promising activity.

A Neutrosophic approach of MRI denoising

Abstract: In this paper, a new filtering method to remove Rician noise from magnetic resonance image is presented. This filter is based on Neutrosophic set (NS) approach of median filtering. A Neutrosophic set, a part of neutrosophy theory, studies the origin, nature and scope of neutralities, as well as their interactions with different ideational spectra. Here the MRI image is transformed into NS domain, which is described using three membership sets: T, I, F. The entropy of the neutrosophic set is defined and employed to evaluate the indeterminacy. The γ-median filtering operation is used on T and F to decrease the set indeterminacy and remove noise. We have conducted experiments on real MR image with Rician noise added. The performance of this filter is compared with the median filtering and the classical non local mean (NLM) de-noising approaches. This filter outperforms the median filter for different levels of noise. For low signal to noise ratio (SNR), this filter provides high peak signal to noise ratio (PSNR) than the NLM approach.