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Howrah, India

Indian Institute of Engineering Science and Technology, Shibpur , commonly abbreviated as IIEST Shibpur, is a premier public institution for research and education in engineering, science and technology, located at Shibpur, in Howrah district, in the state of West Bengal in India. IIEST Shibpur is one of the top engineering institutes in the country. It is classified as an Institute of National Importance by the Government of India since 2014.Established in 1856, it was formerly an institution under the state government of West Bengal and known as Bengal Engineering and Science University, Shibpur from 2004 to 2014 and Bengal Engineering College, Shibpur prior to that.In March 2014, it was elevated to national status by amending the National Institutes of Technology and Science Education and Research Act, 2007, thus renaming it to IIEST Shibpur and granting it the status of Institutes of National Importance.The institute offers Bachelor's, Master's and Doctorate degrees in Engineering and Architecture as well as Master's and Doctorate degrees in Science and Management in addition to various part-time courses. Wikipedia.

Saha S.K.,Bengal Engineering and Science University
Chemical Engineering Communications | Year: 2013

The experimental friction factor and Nusselt number data for laminar flow through a circular duct having integral helical corrugations and fitted with a helical screw-tape insert are presented. Predictive friction factor and Nusselt number correlations are also presented. The thermohydraulic performance was evaluated. The major findings of this experimental investigation are that the helical screw-tape insert in combination with integral helical corrugations performs significantly better than the individual enhancement technique acting alone for laminar flow through a circular duct up to a certain value of the fin parameter. This research finding is useful in designing tubes carrying solar thermal mass of viscous oil in a parabolic trough solar collector used in environmentally sound and increasingly cost-effective solar thermal electric power plants. The result is also useful in designing heat exchangers used in process industries. © 2013 Copyright Taylor and Francis Group, LLC. Source

Chatterjee S.,Bengal Engineering and Science University
Journal of Sound and Vibration | Year: 2010

An active, standalone vibration absorber utilizing the state feedback taken from the absorber mass is proposed. Expressions of the optimum absorber parameters are obtained both by optimizing the Η∞ norm of the frequency response function. For improved transient response featuring low peak response and fast attenuation, the design procedure utilizes the mode equalization followed by the maximization of the damping. An interesting feature of the proposed absorber is that the performance of the absorber does not require having its natural frequency close to the natural frequency of the primary system as is generally the case for tuned passive absorbers or other active and semi-active tuned vibration absorbers. In fact, the performance of the proposed system can be progressively enhanced by increasing the absorber frequency. Compared to the optimum passive absorber, the optimal active absorber can yield wider bandwidth of operation around the natural frequency of the primary system and lower frequency response within the suppression band. The active absorber also offers better transient response compared to the passive absorber both optimized for the best transient responses. The efficacy of the absorber is analyzed both for a single-degree-of-freedom and beam like primary structure. © 2010 Elsevier Ltd. Source

Saha S.K.,Bengal Engineering and Science University
Experimental Thermal and Fluid Science | Year: 2012

The experimental friction factor and Nusselt number data for laminar flow through a circular duct having axial corrugation and fitted with centre-cleared twisted-tape have been presented. Predictive friction factor and Nusselt number correlations have also been presented. The thermohydraulic performance has been evaluated. The major findings of this experimental investigation are that the centre-cleared twisted tapes in combination with axial corrugation perform better than the individual enhancement technique acting alone for laminar flow through a circular duct up to a certain amount of centre-clearance. © 2011 Elsevier Inc. Source

Basu S.,Jadavpur University | Bhattacharyya P.,Bengal Engineering and Science University
Sensors and Actuators, B: Chemical | Year: 2012

Graphene, a monolayer of graphite sheet consisting of sp2 hybridized carbon atoms covalently bonded to three other atoms (discovered in 2004), has recently attracted the attention of chemical sensor researchers owing to its unprecedented structural, mechanical and electrical properties. Excellent mechanical strength (Young modulus ∼0.05 TPa), potentiality of ultrafast electron transport (highest mobility ∼200,000 cm 2/V s) along with the best surface to volume ratio has opened up the opportunity to use the material for future gas and vapor sensors with ultra fast speed and long-term durability. Since it is a two dimensional material, every atom of graphene may be considered a surface atom and as a result every atom site may be involved in the gas interactions. This feature of graphene can eventually be responsible for its ultra sensitive sensor response with the lowest detection capability approaching even a single molecule. Further, the ease of functionalization of the material either by chemical means (absorption of many molecules like oxygen or hydrogen) or by application of voltage or pressure, facilitates bandgap-engineering which in turn may lead to a possible solution to the selectivity issues, the perennial problems of chemical sensors. In this review, the latest advancement and new perspectives of graphene based gas and vapor sensors have been discussed critically. © 2012 Elsevier B.V. Source

Chattopadhyay A.K.,Bengal Engineering and Science University
IEEE Industrial Electronics Magazine | Year: 2010

With the rapid developments of high-power semiconductors and microprocessordigital signal processor (DSP)-based control and estimation technologies, high-power, high-performance ac drives using either induction motors (IMs) or synchronous motors (SMs) with cycloconverters or inverters have replaced the earlier dc drives for applications in the steel industry during the last 30 years. In this article, a review of the state-of-the-art high-power devices, such as silicon-controlled rectifiers (SCRs), gate turn-off thyristors (GTOs), insulated-gate bipolar transistors (IGBTs), integrated gate-commutated thyristors (IGCTs), and injection-enhanced gate transistors (IEGTs), converters, such as cycloconverters and three-level inverters, and control technologies adopted for such drives, such as the vector control (VC) and the direct torque control (DTC), is presented with brief features of the industrial ac drives developed for the steel industry by the leading drive manufacturers worldwide. © 2010 IEEE. Source

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