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Jamdade S.G.,Nowrosjee Wadia College | Jamdade P.G.,College of Engineering, Pune
International Journal of Renewable Energy Research | Year: 2012

Wind speed is the most important parameter in the design and study of wind energy conversion systems (WECS). The main aim of this study is to assess wind power potential of a site for wind power plant development. Availability of wind energy and its characteristics at Malin Head, Dublin Airport, Belmullet and Mullingar in Ireland has been studied based on primary data collected at these sites for a period of seven years. The wind speeds at height of 50 m above ground level were measured. Two parameter Weibull distribution's linear regression model is used for analyzing wind speed pattern variations. Weibull parameters are calculated by using Least Squares Fit Method (LSM). Our analysis shows that the coastal sites of Ireland such as Malin Head, Dublin Airport and Belmullet have good wind power potentials. These potentials if utilized they will provide solution towards power shortage problem of Ireland. Large magnitudes of winds for power generation occurred during the months of October to March and in May month. Source

Ranade N.V.,Nowrosjee Wadia College | Gharpure D.C.,University of Pune
ISPTS 2015 - 2nd International Symposium on Physics and Technology of Sensors: Dive Deep Into Sensors, Proceedings | Year: 2015

Electrical Impedance Tomography (EIT) has its applications in several areas like medical imaging, process tomography, geophysical mapping of earth's crust and non destructive testing. Every application of EIT demands specific requirements from the instrumentation which is used to gather surface potential data from the object to be inspected. Key issues regarding design and choice of instrumentation are discussed in this paper. A data acquisition system for EIT is designed, developed and tested for certain conductivity range and adjacent excitation adjacent measurement strategies. The preliminary results show agreement with the reported data. The simple and low cost hardware developed in this work is useful for acquiring complete data set required for image reconstruction in EIT. The discussion regarding key issues in designing EIT instrumentation will be useful while developing any new application of EIT. © 2015 IEEE. Source

Dhorde A.A.,Nowrosjee Wadia College | Dhorde A.G.,University of Pune
Transactions of the Institute of Indian Geographers | Year: 2013

The present paper examines the inlet behaviour, in terms of the shifts in the inlet location over a span of last eight years (2002-2010), and its impact on the adjacent beach-dune complex. Valvati tidal inlet is observed to exhibit a strong instability in its location and is characterized by seasonal shifts in the ebb channel across the beach with a history of inlet migration over years. The zone of inlet shifts was demarcated and profiles were superimposed for four periods in order to understand the erosion/fill of the beach-dune complex. The Beach-dune complex in the north was found to be more stable and recorded less of variations whereas, the southern section of this complex (closer to the inlet) exhibited maximum variations. These variations were in terms of lowering of the dune crest and erosion on either side as well as formation of an extensive berm. A definite shifting pattern in the inlet location was observed to have direct impact on the lower section of the dune complex. Lowering and recession of the dune complex exhibited changes in the tidal prism at Valvati. The depth at the inlet throat reduced considerably by 2010 (1.24m) as against the 2008 (3m) condition. 2010 condition exhibited a tidal prism of 1.1 106 m3 as against a tidal prism of 9.2 106 m3 in 2008. A strong cyclicity, in terms of the inlet shifts, along with the inlet behavior induced changes in the adjacent beach-dune complex is thus ascertained for this region. Source

Chabukswar V.V.,Nowrosjee Wadia College | Bhavsar S.V.,Nowrosjee Wadia College | Mohite K.C.,University of Pune
Journal of Macromolecular Science, Part A: Pure and Applied Chemistry | Year: 2012

In this paper, we report the synthesis of poly(N-ethylaniline) (PNETA) by using tartaric acid (TA) as an organic acid dopant by aqueous polymerization method of N-ethylaniline using ammonium per sulphate (APS) as an oxidant and acrylic acid (AA) as a soft template. This is a new polymerization method for the direct synthesis of the emeraldine salt form of poly(N-ethylaniline) in bulk quantity, which is soluble in organic solvents such as m-cresol and N-methyl pyrrolidinone. The prepared polymers were characterized by UV, FTIR, XRD, TGA, SEM and conductivity measurement studies. The results are discussed with reference to HCl doped poly(N-ethylaniline). It is observed that PNETA/TA/AA polymer is comparatively more soluble in m-cresol than that doped with HCl in its salt form. The formation of emeraldine salt phase and dopping process was confirmed by FTIR and UV-Vis spectroscropy. We demonstrate the effect of organic dopant on the morphology and conductivity of the PNETA. It was found that, PNETA doped with TA synthesized using acrylic acid (AA) as a soft template display higher doping level, crystallinity and solubility in common organic solvent. On the contrary, HCl doped polymer was lowered at doping level and amorphous in nature which reflects the role of organic dopant and soft template. X-ray diffraction studies indicate that the PNETA/TA/AA doped samples exhibit higher crystallinity, which indicates enhanced polymer sub-chain alignment as compared to HCl doped polymer. This is also manifested by the FTIR studies. SEM result also revealed the continuous morphology and sub-micrometer size, evenly distributed particles of the PNETA/TA/AA doped polymer. © 2012 Copyright Taylor and Francis Group, LLC. Source

Chabukswar V.,Nowrosjee Wadia College | Horne A.,Nowrosjee Wadia College | Bhavsar S.,Nowrosjee Wadia College | Mohite K.,University of Pune
Journal of Macromolecular Science, Part A: Pure and Applied Chemistry | Year: 2012

Synthesis of poly(o-anisidine) doped with various protonic acids by using ammonium persulphate as oxidizing agent were carried out in aqueous acid media. Influences of protonic acids on the physicochemical properties were investigated. The various process parameters were optimized to obtain poly(o-anisidine) in the conducting salt phase form. The results are discussed with references to different protonic acids. It was observed that poly(o-anisidine) is highly soluble in organic solvents, such as m-cresol and N-methyl pyrrolidinone (NMP). The polymers were characterized by UV-Visible, FTIR, SEM, XRD and conductivity measurements. A result shows that, different types of dopant acids HCl, H 2SO 4 and HClO 4 affect the morphology and electrical conductivity of the polymer. The electrical conductivity of the polymer follows the order HCl >H 2SO 4>HClO 4. Thus the effect of dopant ion type and the size of its negative ions influence the physico-chemical properties. UV-Vis absorption spectra shows peaks at 740-783nm with shoulder at 380-420nm as characteristic peaks for the emeraldine salt (ES) phase of poly(o-anisidine) POA. The FTIR spectra show a broad and intense band at ~2800-3001cm -1 and ~1159-1170cm -1 that account for the formation of ES phase of the polymer. The X-ray diffraction spectra show a characteristic peak at 20-30 o, 2 range which reveals partial crystalline structure. The conductivity of the poly(o-anisidne) salt was found to be in the range of 10 -3 to 10 -2 S/cm. SEM studies of poly(o-anisidine) doped with HCl shows the continuous granular uniform morphology with sub-micrometer evenly distributed particles of size ~ 100-200nm.Copyright © Taylor and Francis Group, LLC. Source

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