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Saravanan S.,Sri Venkateswara College of Engineering | Nagarajan G.,Anna University | Lakshmi Narayana Rao G.,QIS Institute of Technology
International Journal of Sustainable Engineering | Year: 2016

The main objective of this work is to control the NOx emission of a stationary diesel engine fuelled with crude rice bran oil methyl ester blend with less sacrifice on smoke density and brake thermal efficiency (BTE) and also to investigate the factors influencing the objective. Fuel injection timing, percentage of exhaust gas recirculation and fuel injection pressure are chosen as the promising factors for the objective and NOx emission, smoke density and BTE are considered as response variables. Tests were conducted as per Taguchi’s L9 orthogonal array and the most influencing factor for each response variable and also the significance of each factor on the same was found out through analysis of variance (ANOVA). Response graph was drawn for each response variable and from the results of response graph and ANOVA the optimum combination of the factor levels in achieving the objective was obtained and the same was confirmed experimentally. © 2016 Taylor & Francis


Nalluri L.,Gudlavalleru Engineering College | Akula M.,Gudlavalleru Engineering College | Vadlamudi S.D.,Ananth Technologies Ltd | Vaddempudi K.R.,QIS Institute of Technology
International Journal of Applied Engineering Research | Year: 2014

The advent of digital signal processing technology has revolutionized the design of Radar systems providing higher performance at lower cost. The analog implementation of radar does not permit reconfiguring the design. Whenever design parameters change, the hardware is to be replaced. Design in digital domain permits the hardware reconfigurable without the need of replacement. The advent of Digital downconverter made it possible to design the radar receiver in digital domain and also reconfigurable. This paper presents a novel implementation of radar range tracking algorithm for the design of range bin finder in VHDL, whose target range and the design parameters are reconfigurable. The present work is implemented in Xilinx ISE 13.2 targeted towards Kintex-7 FPGA. © Research India Publications.


Saravanan S.,Sri Venkateswara College of Engineering | Nagarajan G.,Anna University | Lakshmi Narayana Rao G.,QIS Institute of Technology | Sampath S.,Rajalakshmi Engineering College
Energy | Year: 2014

The present work explores the possibility of simultaneous reduction of NOx and smoke of a stationary CI (compression ignition) engine fuelled with biodiesel blend. Fuel injection timing is retarded which resulted in lower NOx emission with an increased smoke intensity. NOx emission of the biodiesel at the standard and retarded injection timing was predicted with the help of developed correlations and the same was compared with the NOx emission experimentally determined. It was observed that the predicted NOx emission of biodiesel is comparable with the experimentally determined. Fuel injection pressure was increased at the retarded injection timing and its effect on NOx and smoke emission was investigated. It was observed that the increase in smoke intensity resulting from the retarded injection timing was reduced significantly by increasing the fuel injection pressure. © 2014 Elsevier Ltd.


Mamilla V.R.,St Peters University | Rao G.L.N.,QIS Institute of Technology
Procedia Engineering | Year: 2013

In this paper a single cylinder constant speed air-cooled four-stroke direct injection diesel engine of 4.4 kW is selected for the experimental investigations to evaluate the performance and emission characteristics fuelled with Jatropha oil (JTME), and its blends (20%, 40%, 60%, 80% and 100%). The performance parameters are analyzed include Brake thermal efficiency whereas exhaust emissions include oxides of nitrogen, HC, Smoke and CO. The results of the experiment in each case were compared with baseline data of diesel fuel. It concluded that lower blend of biodiesel 20% JTME act as best alternative fuel among all tested fuel at full load condition. The experimental investigations on the effect of 20% Jatropha methyl esters (JTME) with diesel on performance, combustion and emission characteristics of diesel engine with different combustion chamber geometries (Spherical, toroidal and Re-entrant).Brake thermal efficiency for toroidal combustion chamber was found higher than that of other two combustion chambers. Smoke density, carbon monoxide and hydrocarbons was observed slightly lower for toroidal combustion chamber compared to the other two but those are lower when compared with standard diesel (SCC). However, nitrogen oxides were slightly lower for toroidal combustion chamber compared to the other two but it is higher when compared with standard diesel (SCC). © 2013 The Authors. Published by Elsevier Ltd.


Saravanan S.,Sri Venkateswara College of Engineering | Rao G.L.N.,QIS Institute of Technology
International Journal of Oil, Gas and Coal Technology | Year: 2014

This work attempts to reduce the smoke density of diesel engine by advancing the fuel injection timing and also the NOx emission of the engine by introducing EGR at the advanced injection timing. A single cylinder 4.4 kW air cooled, naturally aspirated, stationary diesel engine was utilised for the investigation. Engine tests were conducted at different loads at standard injection timing and advanced injection timing with and without EGR and performance and emission parameters were measured. It was observed that the smoke density was decreased by 33% at advanced injection timing with 20% increase in NOx emission. As a result of EGR, NOx emission was decreased by 63% with marginal increase in smoke density. The increase in smoke density resulted from EGR is lower than the smoke density of the engine at standard injection timing. Advanced injection timing with EGR increases the maximum heat releases rate of the engine. Copyright © 2014 Inderscience Enterprises Ltd.

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