S. Jaisankar
National Institute of Technology, Tiruchirappalli
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Publication
Featured researches published by S. Jaisankar.
Energy Sources Part A-recovery Utilization and Environmental Effects | 2010
K. N. Sheeba; J. Sarat Chandra Babu; S. Jaisankar
Abstract The decomposition behavior of biomass when subjected to thermal stress is different for each kind of biomass. Modeling a pyrolysis or gasification process is complex because the mechanism of decomposition is highly dependent on its mass loss characteristics. The decomposition behavior of coir pith using thermogravimetric analysis is studied for heating rates of 20 and 25 K/min, and the kinetics are predicted using the well known Arrhenius relationship. It is found that the decomposition characteristics of coir pith can be divided into three different zones designated as moisture removal, pyrolysis zone I, and pyrolysis zone II. The kinetic parameters for each zone are validated using a continuous pyrolyzer. It is found that the predicted kinetic parameters well represented the experimental pyrolysis process within an error of ±15%.
Energy Sources Part A-recovery Utilization and Environmental Effects | 2015
K. N. Sheeba; P. Prakash; S. Jaisankar
The comparative performance of a solar still and a solar still-flat plate collector system has been studied for the actual environmental conditions of Trichy, Tamilnadu, as a measure to improve the efficiency of the solar still. Performance of a solar still with fresh tap water and saline water has been studied followed by a combined solar still-flat plate collector system. It is observed that the combined solar still-flat plate collector daily efficiency was 20.4 and 23.6% more than still alone fresh water and saline water system, respectively. The productivity was 20.8 and 24.1% more than still alone fresh water and saline water system, respectively.
Asian Journal of Research in Social Sciences and Humanities | 2016
S. Thulasi; S. Jaisankar
The effects of Nusselt number, friction factor and thermal performance are discussed by introducing the variable header in a solar water heater. The Experimentation has been carried out with conventional and variable header solar water heating systems. The Experimentation has been conducted under natural circulation with Reynolds number range of 183–563. The result revealed that the average Nusselt number is 3.86% higher in variable header compared to conventional one. Similarly the average thermal efficiency is 7.38% higher than the conventional header. The experimental Nusselt number, friction factor are compared with fundamental equations, the deviation falls within ± 8.25% and ± 8.39% respectively. The experimental results validated with CFD analysis and deviation falls within ± 16.57%.
Asian Journal of Research in Social Sciences and Humanities | 2016
V. Arunprasad; P. Murugesan; S. Jaisankar
Experimental investigation of heat transfer and friction factor characteristics of thermosyphon solar water heater with helical screw tape of various twist ratios(Y=3, 4, 5 and 6) has been studied. Compared to other twist ratio, the minimum twist ratio 3, offers higher Nusselt number, friction factor and Thermal performance. The average Nusselt number, friction factor and thermal efficiency for helical screw tape collector with minimum twist ratio 3 are 13.86, 0.111 and 63.62% respectively. Whereas the increasing twist ratio decreases the above performance. The heat removal factor for screw tape collector with twist ratio 3 has 54.4% higher than plain tube collector. Correlations developed for friction factor and Nusselt number has been verified and deviation falls within ±13%.
Energy Sources Part A-recovery Utilization and Environmental Effects | 2015
G. Maddukuri; K. N. Sheeba; P. S. Biruli; S. Jaisankar
Utility and industrial steam generators in India are designed to burn coal for generating electricity, due to coal availability and economy. Rapid increase in coal-fired power projects increased the gap in demand and supply and therefore necessitated using available coals rather than plant design coal. Studies in different capacity boilers using coals of varying properties like gross calorific value, fixed carbon, volatile, moisture and mineral matter up to 100% in gross calorific value and 200% in mineral matter more than that of designed coal has been conducted. Performances of boilers were different than predicted due to variations in the fuel characteristics.
Energy Sources Part A-recovery Utilization and Environmental Effects | 2013
K. N. Sheeba; J. Sarat Chandra Babu; S. Jaisankar
The effect of steam/biomass ratio, oxygen/carbon ratio on gas composition, gas heating value, gas yield, tar yield, carbon conversion, cold gas thermal, and overall thermal efficiency on a circulating fluidized bed biomass (coir pith) gasifier has been presented. The presence of steam altered the composition of product gas. A hydrogen yield of 43% has been observed for a steam/biomass of 4.5 and a temperature of 1,008°C due to the presence of potassium oxide in larger quantities in coir pith ash. As the steam/biomass increased, gas heating value decreased, the gas yield decreased, tar yield increased, and carbon conversion decreased.
Applied Thermal Engineering | 2009
S. Jaisankar; T. K. Radhakrishnan; K. N. Sheeba
Renewable & Sustainable Energy Reviews | 2011
S. Jaisankar; J. Ananth; S. Thulasi; S.T. Jayasuthakar; K. N. Sheeba
Energy | 2009
S. Jaisankar; T. K. Radhakrishnan; K. N. Sheeba
Energy Conversion and Management | 2011
S. Jaisankar; T. K. Radhakrishnan; K. N. Sheeba