Bio
Prof. D.V. Mahindru is a Professor in Mechanical Engineering at SRMGPC, Tewari Ganj, Lucknow. He holds an M.Tech. degree. He is a Member of the Aeronautical Society of India (M.Aero.S.I.), a Fellow of the Institution of Engineers (India) [F.I.E.(Ind)], and a Chartered Engineer (C.Engr (Ind)).
Educational Journey
M.Tech
Experience
SRM Group of Professional Colleges, Lucknow
Professor
0 - 0 • Mechanical EngineeringEditors Role
Reviewer
GJRE
2013 -Affiliations
Aeronautical Society of India
Member
Member since 0Institution of Engineers (India)
Fellow
Member since 0Research
Application of Maynard Operation Sequence Technique (M.O.S.T) at Tata Motors and Adithya Automotive Application Pvt Ltd. Lucknow for Enhancement of Productivity-A Case Study
There are millions of jobs and everyone feels that his/her job is unique to them, their product and finally to their organization. But the fact remains that all the jobs are just combinations of 19 basic motions that are used to perform any task. The productivity is key to survival of any organizations and hence profitability. The productivity is defined as “Optimum Utilization of Available Resourcesâ€. To achieve productivity of the highest order, The consumption of all the resources viz Men, Material, Machine, Money and Methodology†have to be optimized. There are primarily three methods of determining the “Standard Time†in which a worker should perform a task: i) Maynard Operation Sequence Technique (M.O.S.T) is a predetermined motion time system that is used primarily in industrial settings to get the standard time in which a worker should perform a task. ii) Time Study is a traditional Work Measurement technique which is involved to calculate the time of the operation in an assembly line with the help of instrument (Stopwatch). iii) Taylorism, System of scientific management advocated by Fred W. Taylor. In Taylor’s view, the task of factory management was to determine the best way for the worker to do the job, to provide the proper tools and training, and to provide incentives for good performance. He broke each job down into its individual motions, analyzed these to determine which were essential, and timed the workers with a stopwatch. With unnecessary motion eliminated, the worker, following a machinelike routine, became far more productive. In the present work, comparative case study of the “M.O.S.T.†and “Traditional Time Study†was carried out for Fitment of particular parts at M/S Adithya Automotive Application Pvt Ltd. Lucknow and Assembly Line-3 at Tata Motors Ltd, Lucknow and there was appreciable decrease in time taken by M.O.S.T. in accomplishment of task in both the cases. A total decrease of 16.8% was observed in M/S Adithya Au
Employability: Ingredients, Enhancement and Market Requirements
The concept of employability has been in the literature for many years. Current interest has been driven by the changing nature in public employment policy, with increasing emphasis being given to skillsbased solutions to economic competition and work-based solutions to social deprivation. It is supposed there is end of ‘careers’ and “lifetime job securityâ€, which have, of course, only ever applied to a minority of the Workforce, the greater uncertainty among employers as to the levels and types of jobs they may have in the future, and the need to build new relationships with employees is the need of the hour. The paper discusses at length, the ingredients of employability and the “Type of Engineers†the industry is looking for. To ensure continued employment and smooth transition from one “employment to anotherâ€, engineers must follow the principles stated in this paper.
High Temperature Adhesive: Eccobond-104
Eccobond 104, a high temperature epoxide adhesive is used for bonding porous/nonporous materials. e.g. 1. Metals preferably Aluminium, Carbon Steel, Stainless steel, brass carbon steel, 2. Ceramics, 3. Plastics, 4. Metalized carbon to steel, 5. PTFE, 6. Glass, 7. Thermo set. Various standards have dealt with the properties, preparation, application, curing and inspection of Eccobond 104/104B. The present paper takes in to count various requirements of preparation, application, curing and testing of the adhesive. In the present study, which is based upon various standards followed by different organizations in the world and author’s own experience of working with this high temperature adhesive. After curing the adhesive retains good strength up to 220deg C. The shear strength is found to be : • 17.4 MP a at 24 deg C. • 12.5 MP a at 150 deg C. • 7 MP a at 230 deg C. • (1 MP a =145psi).v
Latent Heat Storage System- A Panacea to Address Energy Needs
The need for alternative sources of energy is of vital importance in the present time when the world’s non-renewable energy sources are rapidly getting depleted. The reason for this depletion is that humans are utilizing the energy at a much faster rate than is being produced. Additionally, in some cases, it is inevitable that the primary source of certain forms of energy will just get exhausted. Clearly this is a problem that requires a lot of attention and it becomes imperative that effective solutions are devised. Solar energy is one such alternative form. It is renewable, environment friendly, easily available and free of cost. One major drawback is that solar energy is available for use only during the day. Hence it becomes necessary that a way is found by which we can utilize solar energy even during the absence of the Sun. This project attempts to do just that. The objective of this project is to utilize solar energy during the day and store some of the unused energy for use at night. There are two ways in which thermal energy can be stored, the first being via the sensible heat of a material and the second being via the latent heat. Of course, it is possible that a combination of the two is also used. Additionally, due to the plethora of applications of solar energy, this project limits the use of solar energy for cooking purposes only. This project employs a parabolic trough collector to capture solar energy and phase change materials to store that energy. The captured energy is then retrieved when required during the night. Finally, the effectiveness of the project is determined by the maximum surface temperature achieved on the cooking unit due to the energy extracted from the Phase Change Material (PCM). After conducting the experiment, a water boiling test was performed on the flat plate cooking unit. From the results, it was concluded that Lauric acid can be effectively used as a phase change material for solar cooking application. Cooking using sola
Problem-based Learning: Influence on Students Learning in an Electronics & Communication Engineering Course
Problem -based learning is “Problemâ€......†based†......â€learningâ€. Let us look at each of these words. A problem is something that is problematic to the student; something that cannot be resolved with the current level of knowledge and/or way of thinking about the issues. The nature of effective problems in problem-based learning is that they are ill-structured as opposed to well structured. The characteristics of ill-structured problems are that they are real-life and authentic but not teacher’s exercises, messy not tidy, incomplete in the sense of lacking information needed for their resolution and iterative in the way that they produce further ideas,/hypotheses and learning issues (Barrows 1989; Stephen and Pyke 1977; Margeston 2001). It is vital that the problems are engaging , that they “smell realâ€, are interesting and challenging to students. This engagement stimulates further learning and requires research, elaboration, further analysis and synthesis together with decisions and action plans. The engineering profession requires engineers to deal with uncertainty and solve complex problems of the field, sometimes with incomplete data (Mills & Treagust, 2003; NAE, 2004). In addition, engineers need to be able to function as effective members of teams and have strong communication and problem-solving skills (NAE, 2004). However, today’s engineering graduates lack these skills and have difficulty applying their fundamental knowledge to problems of practice (Mills & Treagust, 2003; NAE, 2005; Nguyen, 1998; Vergara, et al., 2009).
Environmental Control System for Military & Civil Aircraft:
With a view to provide cooling, heating, ventilation, humidity/contaminant control and pressurization within aircraft occupied compartments, cargo compartments and electronic equipment bays Environmental Control system is a part of all Military and civil aircrafts . It also caters to other pneumatic demands like windshield demisting, aerofoil anti-icing, door-sealing, fuel-tank pressurization and engine bay ventilation. The technology used for air conditioning of all types of Military/Civil aircrafts is predominantly Air Cycle air Conditioning. Based upon Joule or Reversed Brayton Cycle, the system utilizes the high temperature, high pressure bleed air extracted from compressor of main engine/APU. It not only enjoys the advantage of simplicity and inherent compactness of pneumatic equipment but also meets the integrated cooling and pressurization requirements of an aircraft. Both air-cycle based refrigeration system which lowers the enthalpy level of air by transforming heat energy into work and conventional vapor compression cooling system that extracts heat by evaporating a suitable liquid refrigerant have their own limitations.
Numerical Computation of Economic Cooling Water rate for Two-stage Azeotropic Refrigerating systems
With a view to conserve energy, the use of azeotropes in a multistage refrigerating system is quite timely. Depending upon the requirement, such a system incorporates conventionally either a water cooled or air cooled condenser. The total operating cost of a refrigerating system with a water cooled condenser comprises the cost of water and the cost of electricity needed to drive the compressor(s). There is enough potential for research in finding out the ways to achieve maximum coefficient of performance and the least operating cost simultaneously for multi-stage azeotropic refrigerating system. However, to avoid overloading of sewage facilities and to comply with municipal codes for the use of water, the water flow rate required in refrigerating system should be minimized. In the present investigation, economic water rates for two stage refrigerating systems, operating on most commonly used azeotropes R-500 and R-502, have been searched out over a wide range of operating limits. Such economic rates, if followed, would produce maximum COP and consume minimum power. The effects of controlling variables, e.g. approach, cost ratio etc have also been studied on the heat transfer to condenser, optimum condensing temperature and economic water rate. The results have been presented in tabular form only.
Review of Rapid Prototyping-Technology for the Future
The term “Rapid Prototyping†(RP) refers to a class of technologies that can automatically construct physical models from computer-Aided Design (CAD) data or is a group of techniques used to quickly fabricate a scale model of a physical part or assembly using three-dimensional computer aided design (CAD) data. The “three dimensional printers†allow designers to quickly create tangible prototypes of their designs rather than two dimensional pictures. Such models have numerous uses. They make excellent visual aids for communicating ideas with co-workers or customers apart from design testing. For example Aerospace Engineer might mount a model aerofoil in a wind tunnel to measure lift and drag forces. Across the world, Engineering has the common language and common goal-“Improving the Quality of Life†of mankind without any boundary restrictions. To bring about this much needed change, we require the services of the fraternity of Engineers to work on the challenges posed by our times. The need of the hour is to bring together globally this fraternity to collaborate with each other.
Protective Treatment of Aluminium and its Alloys
Aluminium is a very reactive metal with a high affinity for oxygen. Nevertheless, the metal behaves as resistant to corrosion under most environmental conditions due to inert and protective character of the aluminium oxide film which forms naturally on the metal surface. Thus in most environments, the rate of corrosion of aluminium decreases rapidly with time. These properties exhibited by aluminium are also present in the alloys of aluminium; though the protection given will depend upon the type of alloy and its condition. 1.2 There are however a number of conditions, commonly encounte red, under which aluminium gets extensively corroded. The corrosion takes place either through the pores in the oxide film or in the areas from which the oxide film has been removed due to abrasion under normal environmental conditions. Also under certain circumstances, the protective film does not form at all leading to high rate of corrosion.
