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Karandikar P.B.,Army Institute of Technology | Talange D.B.,College of Engineering, Pune | Mhaskar U.P.,Schneider Electric | Bansal R.,University of Queensland
Energy | Year: 2012

Energy storage is a persistent problem in general and electrical energy storage in particular. Supercapacitor is emerging technology in the field of electrical energy storage and its use along with battery or fuel cell is viewed as a solution in many portable systems. Supercapacitor is a new pulse power source and it shave off the pulse power demand. The energy density, power density of supercapacitor is determined by may parameters of electrode and electrolyte. For most applications, it is important to reduce weight and cost of supercapacitors. In this paper, we have developed low cost aqueous metal oxide based supercapacitor through material characterization. Modeling approach is used to characterize the material and complete supercapacitor as a device. Statistical modeling is used to find most significant parameters of this device. Life cycle and temperature tests were performed to study the possibility of developing battery-supercapacitor hybrid power source. © 2012 Elsevier Ltd. Source

Karandikar P.B.,Army Institute of Technology | Talange D.B.,College of Engineering, Pune | Mhaskar U.,Schneider Electric | Bansal R.,University of Queensland
Electric Power Components and Systems | Year: 2012

Electrical energy storage is a critical parameter in many advanced electric vehicles. Conventional batteries provide limited solution in this regard. Development of a battery compatible super-capacitor can give a good hybrid energy storage system consisting of a battery and super-capacitor. An aqueous metal oxide super-capacitor is voltage compatible with a conventional battery. Advances are required in improving both the energy and power density of this super-capacitor through a new electrode, electrolyte materials, and issues related to the construction of the device. Modeling with electrical parameters as an output and electrode/electrolyte parameters as an input can be very effective in developing a low-cost super-capacitor. Electrode construction and material play important roles in its performance; these two aspects have been addressed in this article through a modeling approach to convert a manganese oxide-based aqueous super-capacitor into a cost-effective product. New super-capacitor structures are presented, along with capacitance and equivalent series resistance model validation, for a manganese oxide-based symmetrical aqueous super-capacitor by changing the input parameters. © 2012 Taylor and Francis Group, LLC. Source

Karandikar P.B.,Army Institute of Technology | Talange D.B.,College of Engineering, Pune
PECon2010 - 2010 IEEE International Conference on Power and Energy | Year: 2010

Supercapacitors (SC) / Electro Chemical Double Layer Capacitor (EDLC) is yet to experience widespread use. Recently, advances have been made in improving both energy and power density. Due to their limited power and energy capabilities, they saw use in applications such as memory backups. New applications in the area of FCV, EV, EHV, space, military, automotive subsystems and industrial automation are being attempted at an increasing rate. Its use in electronic devices like mobiles, Laptops and communication systems is gaining momentum. Supercapacitor is mainly a pulse power device even though it is seen as a replacement to battery in low power applications. In pulse power, the width of pulse, stability, repetition rate along with commercial aspects like cost, volume, weight and life requires attention. Aqueous metal oxide based supercapacitors are more compatible with battery. Material based models which are useful in fabrication of electrode are presented for their comparative study. ©2010 IEEE. Source

Awasarmol U.V.,Army Institute of Technology
Experimental Thermal and Fluid Science | Year: 2015

The main objective of this experimental study is to quantify and compare the natural convection heat transfer enhancement of perforated fin array with different perforation diameter (4-12 mm) and at different angles of inclination (0-90°). The variables for this natural convection cooling with the help of finned surfaces are orientation and geometry. In this study, the steady state heat transfer from the solid fin and perforated fin arrays are measured. The increase in the heat transfer coefficient was achieved with perforated fins of 12 mm perforation diameter at the angle of orientation 45°, which shows about 32% enhanced heat transfer coefficient as opposed to the solid fin array with nearly 30% saving in material by mass. © 2015 Elsevier Inc. Source

Patil G.R.,NBN Sinhgad Technical Institute Campus | Kokate V.K.,Army Institute of Technology
International Journal of Wireless and Mobile Computing | Year: 2015

A new approach to Semi-Blind Channel Estimation (SBCE) technique for Multiple Input Multiple Output (MIMO) wireless communication system is proposed in this paper. It combines the least squares (LS) and Minimum Mean Square Error (MMSE) Training-Based Channel Estimation (TBCE) scheme with whitening rotation-based SBCE scheme. In this approach, the singular value decomposition has to be applied only once, thereby reducing the computational complexity. The channel correlation matrix required by MMSE technique can be obtained based on latest channel conditions. The performance of this scheme is compared with whitening rotation-based SBCE under various parameters such as modulation schemes, Signal-to-Noise Ratio (SNR) and frame length. The performance of the new approach is found to be better in terms of Bit Error Rate (BER) for high SNR, higher modulation order and smaller frame lengths. With low SNR, lower modulation order and larger frame lengths, there is negligible reduction in performance. Copyright © 2015 Inderscience Enterprises Ltd. Source

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