Mechanization and Import Substitution in Zimbabwean Farmers' Equipment: A Case Study of the Revitalization of an Abandoned Tractor Trailer
Drill String Vibrational Analysis and Parametric Optimization for a Portable Water Well Rig Development
An Efficient Deep Neural Network with Amplifying Sine Unit for Nonlinear Oscillatory Systems
The Occupational Directness of Nanorobots in Medical Surgeries
Recent Trends in Solar Thermal Cooling Technologies
Design of Oil-Ammonia Separator for Refrigeration Systems
A Review on Mechanical and Tribological Characteristics of Hybrid Composites
Design and Experimental Investigation of a Natural Draft Improved Biomass Cookstove
Progressive Development of Various Production and Refining Process of Biodiesel
Optimization of Wire-ED Turning Process Parameters by Taguchi-Grey Relational Analysis
Evaluation Of Mechanical Behavior Of Al-Alloy/SiC Metal Matrix Composites With Respect To Their Constituents Using Taguchi Techniques
Multistage Extractive Desulfurization of Liquid Fuel by Ionic Liquids
Isomorphism Identification of Compound Kinematic Chain and Their Mechanism
Development of Electroplating Setup for Plating Abs Plastics
A Comprehensive Review of Biodiesel Application in IDI Engines with Property Improving Additives
The use of vegetable oils as an alternative fuel for diesel engine is accelerated by the energy crisis due to depletion of resources and increased environmental problems. Biodiesel production is a very modern and technological area for researchers due to the relevance that it is winning everyday because of the increase in the petroleum price and the environmental advantages. It was reported that a diesel engine without any modification would run successfully on a blend of 20% vegetable oil and 80% diesel fuel without damage to engine parts. Edible and non-edible oils can be used for biodiesel production. As India is importing 44 percentage of its edible oil requirement and government policy of not to have edible oil for biodiesel production has led to the way for inedible oil research and development for biodiesel production in a massive way. The economics of existing oil price and different inedible feedstock sources for biodiesel production have been extensively investigated in this paper.
The purpose of this paper is to combine the consumer needs and design decisions for redesigning a Foil sealer which is existing Bangladeshi market. Quality Function Deployment (QFD), functional decomposition is used to frame a formal optimization model that links product design and marketing decision making models by defining and coordinating interactions between the two. The redesigning of the Foil sealer is implemented using popular Quality Function Deployment (QFD) based approach. It is found out that the existing product suffered from some drawbacks mainly temperature control and heat management. A QFD model is defined in order to expand the services provided by an existing Foil Sealer in market which is congruent with the consumer needs. The model would reflect the impact of overriding characteristics of the new product. New components are introduced and modifications were made to the existing design to accommodate the customer needs. These new characteristics of components are analyzed using 3D diagrams. This paper describes the efficacy of the QFD based approach to investigate the customer needs and modification of an existing product.
India is one of the world’s largest emitters of methane from landfill sites. In fact landfills are the second-fastest growing source for methane emissions in India after coal mining. There are close to 5,100 cities and towns in India, most of them having one or two landfills, which are a source of uncontrolled release of methane emissions. The quantification of methane from landfills is important to evaluate measures for reduction of greenhouse gas emissions. Presently, virtually none of the methane emitted from landfills in India is captured and utilized as a source of renewable energy. The main objective of the research was to estimate the methane emissions from selected urban landfills in India and to assess the energy recovery potential from these landfills. The assessment of energy potential was done using the first order decay model. The data for research analysis was gathered from US Environment Protection Agency Methane to Markets partnership program and the Central Pollution Control Board. The paper concludes that except one landfill, rest of the five landfills has the potential to recovery energy. There is a need to develop India specific landfill gas estimation model. The construction of regional landfills in place of scattered open dumps is required to properly manage the environmental impacts of landfill gas. In addition to reaping economic and health benefits, carbon credits can also be obtained.
Electro Chemical Discharge Machining (ECDM) is an emerging technique in precision machining of non-conducting materials. This hybrid machining process combines the principles of Electric discharge machining and Electro-chemical machining. The current paper discusses usage of ECDM along with a case study on machining soda lime glass, wherein the ‘Tool Wear (TW)’ and ‘Material Removal (MR)’ were studied for two different tool materials— ‘copper’ and ‘stainless steel’. The electrolyte used was NaOH. Using design of experiments and L—4 orthogonal array, it was experimentally found that all the parameters selected were significant. The TW in copper is high as compared to stainless steel and the MR is affected maximum by the applied voltage followed by electrolyte concentration.
The present work describes a theoretical investigation concerning the performance of a four strokes compression ignition engine, which is powered by alternative fuels in the form of diesel and biodiesel blends. The developed simulation model used to estimate the cylinder pressure, heat release rate, brake thermal efficiency, brake specific fuel consumption and engine out emissions. The simulation model includes Honerberg’s equation heat transfer model, Zero dimensional combustion model for the prediction of combustion parameters and NO formation during combustion process using Zeldovich mechanism.Experiments were performed in a single cylinder DI diesel engine fuelled with a blend of pungam methyl ester for the proportion of 10%, 20% and 30% by volume with diesel fuel for validation of simulated results. It was observed that there is a good agreement between simulated and experimental results which reveals the fact that the simulation model developed predicts the performance and emission characteristics of any biodiesel and diesel fuel and engine specifications given as input.
This work aims to present a study on 3-Body abrasive wear behavior of ABS plastic on an indigenously developed 3-body abrasive wear tester. The 3-Body wheel abrasion test was carried out at 950 rpm test speed. The tests were carried out at 30N load by varying the abrading distance from 100 to 200m and also under varying moisture conditions, the abrasive grains of 300 and 425 microns were used for the abrasion wear test at dry and varying moisture conditions. Experimental results of abrasive wear tests revealed that wear of ABS plastic was sensitive to variations of abrading distance, varying moisture conditions, abrasive particle size. The results provided critical understanding on the impact of moisture on ABS strength and ductility.
In this research work, an attempt has been made to investigate the effect of liquid nitrogen when it was applied to heat generation zones through holes made in the cutting tool insert during the turning of Aluminium 6061 — T6 alloy with uncoated carbide tool. The cryogenic result of the cutting temperature, cutting force, surface roughness, tool wear and chip form for the modified cutting tool insert have been compared with wet machining. The cutting temperature was reduced by 60 — 74% in cryogenic cooling over wet machining. The cutting force was decreased by 21 — 39% in cryogenic cooling with modified cutting tool insert over wet machining. It was also observed that in the cryogenic cooling method, the surface roughness was reduced to a maximum of 43% and the flank wear was reduced by 38 — 49% over wet machining. Cryogenic cooling enabled a substantial reduction in the geometry of tool wear through the control of tool wear mechanisms. The application of cryogenic cooling was considered to be more effective in chip breaking over wet machining.
Nickel-based superalloy, Inconel 718 is widely used in aircraft industry due to its exceptional thermal resistant retaining mechanical properties up to 700°C. On the other hand, it is very difficult to machine, due to their high shear strength, work hardening tendency, highly abrasive carbide particles, tendency to weld and form build-up edge and low thermal conductivity. This paper presents a hybrid optimization approach for determination of the optimum turning process parameters which minimize the Surface Roughness and Tool flank wear together in CNC High Speed turning of Inconel 718 nickel based super alloy using Sandvik make uncoated tungsten carbide cutting tool SNMG 120408 H13A. An exhaustive experimental study has been conducted with various process parameters like speed, feed and depth of cut with three levels each. Thus, an orthogonal array L9 has been adopted to accommodate the factors at their respective levels. The surface roughness and tool flank wear are considered as process performances. A multi-response optimization has been carried out by using Taguchi method based Grey Relational Analysis (GRA). Also the significant process parameters have been found out for the above process optimization by performing an ANOVA. Confirmation tests with the optimal levels of cutting parameters are carried out in order to illustrate the effectiveness of the method. Validations of the modeled equations are proved to be well within the agreement with the experimental data.
