Volume 03 Issue 01
An Investigation on Waste Heat Recovery from Internal Combustion Engine
S. Mathavan, D. Ganesh, G. Nagarajan, R. Murugan | pp: 01-09 | Purchase PDF
Abstract: The focus of the study is to design a waste heat recovery system for recovery energy from internal combustion engine. The current worldwide trend of increasing of energy demand, many segments that is responsible for growing share of fossil fuel usage and indirectly contributes in CO2 emission. It is hope with latest research on exhaust heat recovery system to increase the efficiency of I.C. engine. The exhaust gas from an internal combustion engine carries away about 30% of the heat of combustion. The energy available in the exit stream of many energy conversion devices goes as waste, if not utilized properly. The major technical constraint that prevents successful implementation of waste heat recovery is due to its intermittent and time mismatched demand and availability of energy. In the present work a three fluid shell and tube heat exchanger is designed and it integrated with an IC engine setup to recover heat from the exhaust gas to utilize air and Jatropha oil preheating purpose.
Experimental Assessment to Decrease Diesel NOx Emissions in CI Engine by using Urea Solution
D. Jaganathan, M. Mahesh, N. Sethuraman, D. Mala | pp: 10-12 | Purchase PDF
Abstract: Nowadays exhaust emission control from internal combustion engines have become one of the most important challenges. The diesel emissions contributes the health effects, pollution of air, global warming effects and environmental hazards. Among these, emissions of nitrogen oxides (NOx) contribute seriously to air pollution, which is a major environmental problem. There are many researches are carried out for control the NOx emission in diesel engines. The objective of this paper is to control the NOx emission by using the mixture of urea and distilled water as per the normalized stoichiometric ratio (NSR).This urea solution reacts with exhaust gas, undergoes chemical reaction and reduce the NOx content. The experiment is carried out in the diesel engine and exhaust gas is analysed by using the gas analyzer.
Investigation of Structural and Optical Properties of Nano Structured Zns Thin Films Prepared by Chemical Bath Deposition for Solar Cell Applications
Hariharan Gajendiran, Shenbagavinayagamoorthi, Navneetha Krishnan, Kalaiselvan Palani , Ezhilkumar Krishnamoorthy | pp: 13-18 | Purchase PDF
Abstract: Thin films of nano structured ZnS were grown on glass substrates by chemical bath deposition technique. The parameters such as time and solution concentration were varied and the optimum conditions were found. Deposition was carried out from an aqueous bath containing thiourea, Zinc Sulphate and ammonia after maintaining the temperature and pH of the bath at constant values of 90° C and 10(base medium). The effects of deposition time on the structural and optical properties of the grown ZnS thin films were determined. The structural and Optical properties of the formed thin films were investigated by the images obtained from Scanning Electron Microscope, Atomic Force Microscope, UV-Vis Spectrophotometer and four point probe measurement. The images obtained from Scanning Electron Microscope showed that the nano particle were in the range of 129nm to 161nm for 3M concentration and 155nm to 177nm for 4M concentration of solution .The Atomic Force Microscope images showed the smooth deposition for 90min deposition time and 3M concentration compared to 4M concentration. UV-Vis Spectrophotometry measurements in the wavelength range of (300 -700nm) indicates the transparency of around 92% to 96%.The absorption coefficient was obtained as a function of photon energy and the ZnS band gap value was determined in the range of 3.64eV – 3.96eV.The deposition time and solution concentration were optimized for chemical bath deposition and the best deposition of ZnS nano thin films were obtained which can be used for solar cell applications.
A Hybrid Grey-Fuzzy Technique For Optimizing Multiple-Responses In Centerless Grinding
M. Karthikeyan, L. Praveen Kumar, N. Saran Raj, A. Sriram | pp: 19-25 | Purchase PDF
Abstract: This analysis focuses on finding an optimum set of machining parameters in external centerless grinding process by adopting grey relational analysis, coupled with fuzzy logic approach. This hybrid technique is used to determine the grey-fuzzy reasoning grade from the calculated multi-characteristics grey relational grade of surface roughness and roundness error to reduce the fuzziness in output. Experiments are designed using Taguchi’s Design of Experiments (DoE), for three parameters varied through three levels an L9 (33) Orthogonal Array (OA) is selected. The optimal level values are determined from the response table and main effects plot and the individual effect of one parameter over another parameter is determined using the interaction plot. Confirmation experiment conducted with the optimum input parameters obtained from grey-fuzzy reasoning grade shows a reduction in surface roughness and roundness error values.
Effects of Heat Exchanger Parameters of Plate-Fin Heat Exchanger – A Review
R. Arunkumar, R. Pachaiyappan | pp: 26-30 | Purchase PDF
Abstract: A heat exchanger system is a transfer of heat under the temperature difference. There are two runnels R1 and R2. R1 is a warm fluent and R2 is a chill fluent. Using plates, pipes, coils to be partitioned of flowing fluently. Before running a machine, it should be in for various inlet parameters such as compression, the degree of fluid, the velocity with support some external device such as a compressor, pump, heater, and others. One of the way to improve the rate of heat transfer using fins. Fins are used to increase the surface of heat transfer that surface is used to increase the value of heat transfer rate but essential thing to control rising a pressure drop to develop performance and efficiency. Different types of fins such as triangular, rectangular, wavy fin, offset strip fin, rip saw fin, etc. In point of various journal papers about the experimental investigation and numerical investigation to improving the heat transfer effectiveness.