Mechanical Engineering

The manufacturing industries is becoming more competitive in recent decade, thus more concern about their operations and management, which makes industries interested in developing modern management system in order to stay competitive in managing their business operations. The present paper discusses the real time implementation of maintenance management discipline for the better performance and availability of the equipment. A particular section is selected, and analysis of OEE and maintenance discipline has shown a remarkable achievement. Six month continuous monitoring of plant by scholar has suggested implementing a maintenance management discipline for continuous performance improvement and maximum availability of equipments.

This contribution aims to validate a newly developed add-on module to a commercial simulation software, which enables the prediction of the microstructure and mechanical properties of aluminum cast alloys under different casting conditions. The simulation of the casting process and the resulting microstructure and mechanical properties, permits a reduction of experimental testing and providing the best solution of process and material selections, thereby making the design and development process more cost efficient. The simulation results are compared with the investigation of the micro structural and mechanical behaviors of an As-Cast Aluminum cylinder head processed by semi permanent gravity die casting. It is demonstrated that the predictions made by the simulations are comparable to the experimental results. In order to further enhance the quality of the simulation tool, it is of significance to gain more experience from comparisons with complex castings of different aluminum alloys, where the microstructure as well as the mechanical properties are carefully evaluated.

The main objective of the present work is to conduct the computational study of steady flow through the air intake system of a multicylinder SI engine. The CAD geometry of the air intake system of the multi cylinder in line engine was created. Two modification on the induction side one with circular cross section (Path A) and another with rectangular cross section (Path B) were carried out. All the three models are simulated using ANSYS FLUENT, CFD code for the computational study, steady state flow conduction was assumed and the analysis is carried out assuming the intake air flows steady into the system at mean piston speed of the engine. Flow field is predicted by solving the Navier strokes equation and the turbulence is modelled using k-? RNG model. Good agreement is observed from predicted result.

The present research paper has examined the factors which a company must consider while implementing Green Supply Chain Management (GSCM) practices. Manufacturing companies nearby Bhopal will be examined in their approach to be more sustainable. The research method employed is a case study analysis through Semi-structured interviews held with relevant managers. This research correspond with the Strategic and operational planning, Structure, systems, and decision making Management of people and company culture; Relationships with supply chain members. Top-management support is crucial for effectively working GSCM practices. A flat hierarchical structure might be helpful for successful GSCM, but therefore the inherent advantages of a flat hierarchy have to be exploited. Employee involvement is recognized as another crucial element of GSCM. An environmentally friendly company culture is beneficial and should be derived from the companies’ environmental vision and/or mission. Collaborations with suppliers are perceived to be productive and essential to develop innovative products. Other tools, like supplier questionnaires, can help to improve the environmental impact of the whole supply chain.

Implementation of straight and stringent legislation of Nox emission requires the new technological development for Nox abatement from exhaust gases. This paper summarizes the current status of Nox abatement strategy. The main focus is put forward on Nox control methods applied in combustion of diesel fuel in CI Engines furthermore the various methods of Nox abatement techniques emphasized.

Over the years, all parts of a commercial refrigerator, such as the compressor, heat exchangers, refrigerant, and packaging, have been improved considerably due to the extensive research and development efforts carried out by academia and industry. However, the achieved and anticipated improvement in conventional refrigeration technology are incremental since this technology is already nearing its fundamentals limit of energy efficiency is described is ‘magnetic refrigeration’ which is an evolving cooling technology. The word ‘green’ designates more than a colour. It is a way of life, one that is becoming more and more common throughout the world. An interesting topic on ‘sustainable technologies for a greener world’ details about what each technology is and how it achieves green goals. Recently, conventional chillers using absorption technology consume energy for hot water generator but absorption chillers carry no energy saving. With the aim of providing a single point solution for this dual purpose application, a product is launched but can provide simultaneous chilling and heating using its vapour absorption technology with 40% saving in heating energy. Using energy efficiency and managing customer energy use has become an integral and valuable exercise. The reason for this is green technology helps to sustain life on earth. This not only applies to humans but to plants, animals and the rest of the ecosystem. Energy prices and consumption will always be on an upward trajectory. In fact, energy costs have steadily risen over last decade and are expected to carry on doing so as consumption grows. This article discusses the potential for such integrated systems in the stationary and portable power market in response to the critical need for a cleaner energy technology for communities. Throughout the theme several issues relating to renewable energies, environment and sustainable development are examined from both current and future perspectives.

The hip replacement or hip arthroplasty is an orthopedic surgery in which a damaged or dysfunctional hip joint is surgically replaced with a suitable artificial hip prosthesis. During this surgical procedure, a stem is inserted into the patient’s femur for stability; and the head of the femur is replaced with a ball and socket joint is replaced by an artificial cup. Literature survey reveals that various types of methodologies were used by researchers for the development of the hip prosthesis and while after surgery different complications were arise with the patients like mismatch, aseptic loosening, improper load distribution, and discomfort due to change of morphology of human being. It is present status the availability of specific prosthesis for specific patients are very difficult. Due to the high complexity of customized hip implant results in low production rates. Hence it is understood that there is a requirement of machinablity study for manufacturing of customized hip prosthesis. The one part of study is to concern with the design of different types of hip prosthesis like solid, hollow (with and without internal rib structures) to reduce the effective stiffness and due to the hollowness of prosthesis, stiffness increases which will ultimately results in increase the strain at the proximal femur in comparison to solid femur as well as weight of hip prosthesis is drastically reduced. The machining of hip prosthesis is being carried out by taking the CT scan data of the patient using MIMICS software. The data then analyzed with suitable load in ANSYS after that the CAD model of femoral stem was prepared by using the measured data. The blank size of the prosthesis is first calculated. Then the critical profile machining of top and bottom stem is being carried out using 3-Axis CNC vertical milling machine “Mikron” CNC and the parting operation by using wire cut EDM machine by preparing the necessary programme based on the profile of the prosthesis. However, in this study the machining of hip prosthesis is being carried out through conventional route to stress on economical benefits for low cost manufacturing strategy. 

For efficient heating with lesser fuel consumption and a quick way of heating, oxyfuel has been clearly shown to produce very low emissions of CO2 and NOX as compared to air-fuel for 15 years. Among oxyfuels, flameless oxyfuels can be even more economical and technically superior for higher production rates, excellent uniform heating and very low NOX emissions. In the present study, our casting centres have accommodated a number of reheating furnaces along with preheating stands working on flameless oxyfuel to 1 tonne capacity of smallest size ladles. Flameless oxyfuel has improved to a greater uniformity in heat distribution and decreased fuel consumption approximately by 30-65% compared to air-fuel mixture. It also falls to low NOX emission during high levels of ingress air, which is essential for economical use. In this work it lowered scaling losses, refractory wear during reheating and ladle preheating respectively by improving the steel quality to be produced during casting. It is also seen that for low calorific value (below 7-7.5 MJ/Nm3) gases such as top gas released from the furnace, use of oxyfuel combustion is an absolute requirement. With the advances in today’s technology, combining air-fuel and flameless oxyfuel can create semi-flameless combustion without replacing the air-fuel burners. The paper highlights the working of flameless oxyfuel and its application and also presents the results that have been achieved in controlling pollution and consumption.

This is innovative idea to produce electricity. Now a day’s world mostly depends up on the electricity, why means all industry machinery are run by source of electricity. In summer time don’t get the wind and water energy properly. So this time electricity demand are occur .so this kind of problem 50% satisfied the project. This system produces two outputs give one input. The system consists two circuits are primary and secondary circuits. To give input energy to the primary circuits and produced mechanical energy. This Mechanical Energy applied to the secondary circuit. The secondary circuits produce the two output energy. The two output energy is work and electrical energy. Finally DC generator produce 2kw and also work are done. This project using small scale industry means get many profits.

This paper reports the results of the investigation carried out on a single cylinder DI diesel engine for the effects of fuel injection pressure (FIP) on the combustion, performance and emission characteristics. The experiments were conducted at constant speed (1500rpm) with four different FIPs Viz., 200, 400, 600 and 800 bar are used for the injection of fuel with a fixed start of fuel injection. With increased injection pressure the heat release rate increases and also the peak point is advanced in time. The results reveal that with increase in pressure at the full load condition the brake thermal efficiency increases by 11.8%, smoke density reduces from 86HSU to 70HSU. The HC emissions are reduced from 100 ppm to 50 ppm while the oxides of nitrogen emission increase from 960 ppm to 1160 ppm. The Carbon Monoxide emissions are reduced from 0.21 % by volume to 0.16 while the Carbon-di-Oxide reduced by 5.26 %. The brake thermal efficiency is increased by 12% with apparent reduction in smoke reduction by 18%. The cylinder pressure increases from 64 to 80 bar while Heat release rate increases from 112 to 148 kJ/m3 deg. This investigation establishes that switching to higher injection pressure improves fuel economy of diesel engines.