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.

Thermal performance characteristics of liquid sodium as a coolant flowing past a rectangular nuclear fuel element

Abstract: The objective of this work is to numerically investigate the effect of various design parameters on the steady state thermal performance characteristics of liquid sodium which flows as a coolant over a rectangular nuclear fuel element having non-uniform volumetric energy generation. Accordingly, the stream function-vorticity formulation of the full Navier Stokes equations governing flow and thermal fields in the fluid domain (coolant) are solved simultaneously along with energy equation of fuel element, using finite difference schemes. The results obtained are presented in the form of variation of mean coolant temperature at the exit, average Nusselt number and average skin friction coefficient for a wide range of parameters - aspect ratio, Ar, conduction-convection parameter Ncc, total energy generation parameter Qt, and flow Reynolds number ReH. It is concluded that out of the various parameters studied, the flow Reynolds number, ReH considerably influences the mean exit temperature, whereas Ar has the least influence on it.

Correction to: Energy and exergy efficiency analysis of solar still incorporated with copper plate and phosphate pellets as energy storage material.

Abstract: In this work, a new attempt was made to study the behavior of the conventional solar still (CSS) by adding a black-painted copper plate and phosphate pellets. Therefore, the performance of the three solar stills has been studied and compared. The first is the CSS, and the second is the modified solar still (MSS). The MSS performance was tested using black-coated copper plate (measuring 49 × 49 cm and 0.2 cm thick) with and without phosphate pellets and compared to the CSS in the similar climatic conditions. The results showed that the combination of black coated copper plate and the inclusion of phosphate pellets improved the evaporation rate and daily productivity. During the experiments, yields using black coated copper plate without and with phosphate pellets were 14.96% and 29.53% greater than the CSS. The effectiveness of the CSS, MSS with copper metal plate (MSS-CP), and MSS with copper metal plate with phosphate pellets (MSS-CP and PP) are around 30.23, 35.3, and 41.44%, respectively.

Studies on the environmental emission and performance of a single cylinder CI engine with enhanced intake air oxygen combustion

Abstract: The present investigation deals with the combustion, performance, and emission characteristics of cardanol based B20M10 (20% cardanol + 70% diesel + 10% methanol) and B30M10 (30% cardanol + 60% diesel + 10% methanol) biofuel blends. The experiments are conducted on a four-stroke single cylinder diesel engine with 27.5 deg. bTDC standard ignition timing and 180 bar injection pressure at 25%, 50%, 75%, and 100% full load conditions. The experiments have been carried out with B30M10 biofuel blends and the results are compared with B20M10 and baseline diesel fuel. The supply of additional oxygen to the intake air is at a flow rate of 3%, 5%, and 7% by weight. With the increase in concentration of intake air oxygen, CO, HC, and smoke emissions decreases, whereas brake thermal efficiency (BTE) and NOx emission are considerably increased when compared to B20M10 and B30M10 without oxygen enrichment. The BTE of blended fuel B30M10 with 7% oxygen enrichment intake air reaches the efficiency of B20M10. However, comp...

Facial emotion recognition for human-machine interaction using hybrid DWT-SFET feature extraction technique

Abstract: Facial emotion recognition is the most significant parameter for an efficacious Human Machine Interaction (HMI). It plays a crucial role in interpreting and communicating with the people who have speaking impairments as well as a medium to understand and communicate with infants who cannot emote their feelings verbally. In this paper, we propose a hybrid feature extraction technique consisting of Discrete Wavelet Transform (DWT) accompanied by Shape Feature Extraction Technique (SFET).The features extracted were tested on standard classifiers such as Support Vector Machine (SVM) and K-Nearest Neighbourhood (KNN) classifiers. Facial images from JAFFE and Cohn-Kennedy databases were utilized for training as well as testing. The work shows a very high facial emotion recognition rate of 93.94% and 91.8% with the proposed method for JAFFE and Cohn-Kanade databases respectively.

Brass fillers in friction composite materials: Tribological and brake squeal characterization for suitable effect evaluation

Abstract: In this paper, brake pad performance of two organic matrix composites namely, Sample 1 (contains no brass filler) and Sample 2 (contains 1.5% brass filler), is studied based on tribological and squeal noise behavior. In the first stage, a pin-on-disc tribometer is used to evaluate the frictional behavior of the two pads. On the following stage, these pads are tested on squeal noise occurrence using a drag-type brake dynamometer. From the two type of tests, the results show that; (i) brass fillers play a dual role; firstly as reinforcing element of the brake pad providing primary contact sites, and secondly as solid lubricant by contributing to the formation of a layer of granular material providing velocity accommodation between the pad and the disc; (ii) brass fillers contribute to friction force stabilization and smooth sliding behavior; (iii) the presence of small weight quantity of brass filler strongly contributes to squeal occurrences; (iv) there is close correlation between pin-on-disc tribometer and brake dynamometer tests in terms of tribological aspect.