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Sangrur, India

Sant Longowal Institute of Engineering and Technology is an Institute of Technology with status Deemed University in Longowal, Sangrur district, Punjab, India established by Ministry of Human Resource and Development , Govt. of India. The institute is an autonomous body controlled by SLIET society, and fully funded by Ministry of Human Resources & Development , Govt. of India. It is registered under Societies Registration Act, 1860. Wikipedia.


Ghatak H.R.,Sant Longowal Institute of Engineering And Technology
Renewable and Sustainable Energy Reviews | Year: 2011

Today, sustainability is the buzzword in the developmental parlance. This has brought the issue of availability and utilization of energy into sharp focus. There is an urgent need to find viable alternative to fossils, mainly petroleum. It not only provides the major share of our present energy needs but also feeds the organic chemicals industry with vital raw materials. Among many alternative energy sources being explored biomass is the only one that has the potential for such dual application. Comprehensive yet judicious exploitation of biomass is, therefore crucial. The emerging concept of biorefineries is important in this context which advocates multiprocess and multiproduct biomass based industries. But everything green need not always be clean and sustainable as populism often makes it to be. Needless to say, the choices of feedstocks, processes as well as product mix are many. There is a need to critically examine them. This paper presents a status review of biorefineries from the stand point of feedstocks, products and processes. © 2011 Elsevier Ltd. All rights reserved. Source


Singh S.,Sant Longowal Institute of Engineering And Technology | Singh B.,Indian Institute of Technology Delhi
IEEE Transactions on Industry Applications | Year: 2012

This paper deals with a Cuk dc-dc converter as a single-stage power-factor-correction converter for a permanent-magnet (PM) brushless dc motor (PMBLDCM) fed through a diode bridge rectifier from a single-phase ac mains. A three-phase voltage-source inverter is used as an electronic commutator to operate the PMBLDCM driving an air-conditioner compressor. The speed of the compressor is controlled to achieve optimum air-conditioning using a concept of the voltage control at dc link proportional to the desired speed of the PMBLDCM. The stator currents of the PMBLDCM during step change in the reference speed are controlled within the specified limits by an addition of a rate limiter in the reference dc link voltage. The proposed PMBLDCM drive (PMBLDCMD) is designed and modeled, and its performance is evaluated in Matlab-Simulink environment. Simulated results are presented to demonstrate an improved power quality at ac mains of the PMBLDCMD system in a wide range of speed and input ac voltage. Test results of a developed controller are also presented to validate the design and model of the drive. © 2012 IEEE. Source


Dhami A.K.,Sant Longowal Institute of Engineering And Technology
Environmental Monitoring and Assessment | Year: 2012

Electromagnetic radiation emitted by cell phone towers is a form of environmental pollution and is a new health hazard, especially to children and patients. The present studies were taken to estimate the microwave/RF pollution by measuring radiation power densities near schools and hospitals of Chandigarh city in India. The cell phone radiations were measured using a handheld portable power density meter TES 593 and specific absorption rates were estimated from the measured values. These values of electromagnetic radiation in the environment were compared with the levels at which biological system of humans and animals starts getting affected. The values were also compared with the international exposure limits set by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The highest measured power density was 11.48 mW/m2 which is 1,148% of the biological limit. The results indicated that the exposure levels in the city were below the ICNIRP limit, but much above the biological limit. © 2011 Springer Science+Business Media B.V. Source


Ghatak H.R.,Sant Longowal Institute of Engineering And Technology
Critical Reviews in Environmental Science and Technology | Year: 2014

Biorecalcitrant organic pollutants pose a threat to the aquatic environment due to their several detrimental traits. A host of industries as well as municipal facilities are liable to discharge such pollutants. These pollutants cannot be effectively managed by conventional biological and/or physiochemical treatment methods. Advanced oxidation processes, based on very strongly oxidizing free radicals such as hydroxyl radicals, have been found to be effective in destroying these pollutants often leading to their mineralization. This paper attempts to summarize the present state and emerging trends in advanced oxidation based treatment techniques. Reaction chemistries, process conditions, treatment efficiencies, and material and energy inputs required have been discussed. © 2014 Taylor & Francis Group, LLC. Source


Singh S.,Sant Longowal Institute of Engineering And Technology
International Journal of Advanced Manufacturing Technology | Year: 2012

Abstract Present investigation applied the designs of experiments and grey relational analysis (GRA) approach to optimise parameters for electrical discharge machining process of 6061Al/Al2O3p/20P aluminium metal matrix composites. Planning of experiments was based on an L18 (2∧1×3∧5) orthogonal array to determine an optimal setting. The process parameters included one noise factor, aspect ratio having two levels and five control factors, viz. pulse current, pulse ON time, duty cycle, gap voltage and tool electrode lift time with three levels each. The material removal rate, tool wear rate and surface roughness were selected as the evaluation criteria, in this study. Optimal combination of process parameters is determined by the grey relational grade (GRG) obtained through GRA for multiple performance characteristics. Analysis of variance for the GRG is also implemented. It is shown that through GRA, the optimization of the multiple performance characteristics can be greatly simplified. ©Springer-Verlag London Limited 2012. Source

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