IDEAS 2016 - Innovative Developments In Engineering & Advanced Science

IAME-2016 Conference Papers of ME "

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A REVIEW ON COMBINED UNIT OF REFRIGERATION AND WATER HEATER[ ]


To review the energy savings associated with improved utilization of waste heat from a domestic refrigerator. Domestic refrigerators may be operating continuously to maintain proper food storage condition. The continuous operation of this equipment accounts more electrical energy consumption. So it is that a significant and concrete effort should be made for conserving energy through waste heat recovery. A significant amount of waste heat is rejected by the condensers of refrigerator. So an attempt has been made to utilize waste heat from the condenser of a refrigerator. Practical uses of waste heat from the domestic refrigerators are typically to space heating and water heating in minimum constructional maintenance and running cost. Known quantity of water was heated by the condenser coils (due to convection currents) thereby increasing the overall COP of the refrigerator. Besides, the refrigerator may be used as conventional refrigerator by keeping the cabin door open in case of absence of heat sink.

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ATMOSPHERIC WATER GENERATION[ ]


We introduce an atmospheric water generator which works on the principle on thermo electric device. According to our studies we have an idea why should water can produce from air; finally, we notice that the water can produce from highly relative humidity air with moderate atmospheric temperature.

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The Effect of Thermal Radiation on MHD Free Convection Boundary Layer Flow over a Plate with Suction and Blowing[ ]


In this paper we study the effect of thermal radiation on free convection boundary layer flow over a plate with an applied magnetic field. The suction and blowing is incorporated in the analysis. The system of nonlinear, coupled dimensional partial differential equations governing the flow have been reduced to nondimensional equations by applying suitable similarity transformation and those equations are solved numerically using an implicit finite difference scheme along with quasilinearization technique. From the numerical results we observe that the heat transfer coefficient increases with the increase of radiation parameter both in case of suction as well as injection. Also, In the case of suction, the thermal boundary layer thickness increases while the effect of blowing (injection) is just opposite.

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Design and Analysis of Go Kart Chasis[ ]


The prior objective of this journal is to highlight the report of the Go Kart vehicle. Our primary objective is to build a cost effective Go Kart with maximum performance and safety. It should have a torsion free effective frame on which power train is mounted properly. The entire fabrication of the Go Kart is done by strictly adhering the competition rule. It is manufactured for consumer sale. Our Go kart meets all the objectives said in the rulebook. To give a more effective output, we've divided the team into different core groups headed by a leader and every group is monitored by the team captain.

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Design and Fabrication of Reverse Gear Mechanism for Handicapped People[ ]


In the present scenario there were no mopped vehicles equipped with reverse gear facility. So it is very difficult for a handicapped person while the vehicles front wheel gets into a trench as well as in the case of parking. Here introducing a reverse gear mechanism, with portable gear box that can be easly operated by hand. Four gears are used for obtaining reverse motion of the vehicle. In this paper, proposes and designed a gear box which will be fitted into those vehicles without much altering the existing transmission system. This reverse gear mechanism provides a simple, low cost reverse transmission system which will be helpful for handicapped people.

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Design of Planetary Gear Transmission System for Hybrid Scooter[ ]


This paper presents a systematic design methodology of planetary gear transmission system for hybrid scooter. Thedesign methodology consists of analyzing the planetary gear transmission system and designing the hybrid transmission system using planetary gearset. The transmission system designed here is a four stage planetary gear system in which each planetary gearset consists of a sun gear, three planet gears and a planet carrier. The hybrid power systems involved here are an IC Engine and an electric motor. This transmission system works on power mode of hybrid transmission where the combined powers of engine and motor can be taken as output from the planetary gear transmission system.

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Development of a new Coconut Dehusking and Cutting Machine[ ]


This paper presents a new innovative machine for Dehusking and Cutting a coconut. It consist of two units- a dehusking and a cutting unit coupled to each other by an elliptical path. Two rollers with spikes does the dehusking and after that the dehusked coconut moves with the assistance of gravity towards the cutter. The cutter is controlled using a cam. A detailed literature survey on the existing technologies is done and calculations supporting the construction are made.

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Devolopment of Portable Solar Thermoelectric Refrigerator[ ]


The main objective of this project is to design and develop a solar thermoelectric refrigerator inorder to produce a small amount of refrigeration effect by using solar energy.The design of refrigerator is based on the principle of peltier effect.The thermoelectric couples are solid state devices capable of producing a temperature gradient from electrical energy.The experiment results indicates the temperature reduction of 150c with 500ml water kept inside refrigeration space in 50 minutes with respect to 270c ambient temperature.The coefficient of performance of refrigerator was calculated and found to be about 0.17.

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DESIGN, ANALYSIS AND FABRICATION OF GO-KART[ ]


A Go-kart is a small four wheeled vehicle. Go-kart, by definition, has no suspension and no differential. They are usually raced on scaled down tracks, but are sometimes driven as entertainment or as a hobby by non-professionals. 'Carting is commonly perceived as the stepping stone to the higher and more expensive ranks of motor sports. Kart racing is generally accepted as the most economic form of motor sport available. As a free-time activity, it can be performed by almost anybody and permitting licensed racing for anyone from the age of 8 onwards. Kart racing is usually used as a low-cost and relatively safe way to introduce drivers to motor racing. Many people associate it with young drivels, but adults are also very active in karting. Karting is considered as the first step in any serious racer's career. It can prepare the driver for highs-speed wheel-to-wheel racing by helping develop guide reflexes, Precision car control and decision-making skills. In addition, it brings an awareness of the various parameters that can be altered to try to improve the competitiveness of the kart that also exist in other forms of motor racing.

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Four wheel steered multi-utility vehicles-Review[ ]


Four wheel steering is the innovative technology in which research is ongoing. The front-to-rear wheel alignment plays a significant role in the directional stability of a vehicle. Four wheel steering is a system that allows the rear wheels to turn for maneuvering, rather than just follow the front wheels. It is a system employed by some vehicles to improve steering response, increase vehicle stability while maneuvering at high speed, or to decrease turning radius at low speed. This study dealt with reviewing four wheel steering systems in different aspects. In this context, four wheel steering technology along with its historical development was briefly given first. Next, a comprehensive review of studies conducted on them were classified and presented in tables. Four wheel steering modes were then modeled for performance evaluation purposes by using chassis structure and their modes of steering methods. Finally, the results obtained were discussed. It is expected that this comprehensive review will be very beneficial to everyone involved or interested in the automotive design, steering modes, analysis, performance assessment and applications of various types of four wheel steering systems.

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Heat Transfer Analysis on PCM Based Heat Sink Incorporated With Air Convection[ ]


Integrated circuits operate best in a limited range of temperature hence their package must be designed in order to remove the excessive heat. As an alternative passive cooling technique means, phase change materials or phase change materials have been widely investigated for such transient cooling applications considering their advantages such as high specific heat, high latent heat of fusion, controllable temperature stability and small volume change during phase changes, etc. This types of PCM based cooling techniques have different application in various devices which are not be operated continuously over a long period of time, but in intermittently using devices like digital cameras ,cellular phones, notebook etc. The PCM absorbs heat from the electronic component when it operates at high temperature and melts, the molten PCM needs to be re-solidified by dissipating or spreading heat to the surroundings while the electronic device are set idle, such a cooling system is applicable only for intermittent use of devices and cannot be used for those in continuous operations. To achieve effective cooling it is important to ensure that the operating duration of the electronic device should not exceed the maximum melting time of PCM. When practical implementations are considered, advanced transient analysis is required for clear understanding of this mechanism. Controlled convective cooling techniques may be implemented for continuous operations in such kind of systems. The present work is a numerical study consisting of thermal analysis of various configurations of finned heat sink with PCM. The configurations considered are finned heat sink with PCM and without PCM, fin filled with half PCM material, towards the fin tip side and cases which includes forced convection for systems which continuously operates. The transient nature of problems were recorded for performing unsteady analyses. Evaluation of design operational time and characteristics of PCM are carried out. By analyzing these different configurations a vivid, valid picture of the physics of heat transfer in PCM based heat sink is imaged out. Keywords: Heat sink, Phase change materials, Thermal management, and electronics cooling.

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EFFECT OF OUTLET DIAMETER ON THE PERFORMANCE OF GRAVITATIONAL VORTEX TURBINE WITH CONICAL BASIN[ ]


This study focuses on the formation of a water vortex stream by gravitation, which is a new technique in the field of hydro power engineering. The water passes through a large straight inlet, and then passes in to a vertical conical channel, forming a vortex, which finds its outlet at the centre bottom of the shallow basin. Turbine blade is allowed to rotate in the vortex which in turn produces electricity by means of a generator. This type of turbine can be called as gravitational vortex turbine. The advantage of this method for electrical generation is the capability of producing energy using low heads (in the range of .7m to 3m).The turbine does not work on the pressure difference but on the dynamic force of the vortex.

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Suitability of NACA 63212, 63215 and 63415 airofoils for small horizontal axis wind turbine with a brimmed diffuser[ ]


Wind energy is the promising renewable form of energy which have been used by the man kind from ancient times. Ancient sailors utilized wind energy for sailing purpose, then came the utilization for irrigation and at the end of 19th century wind power is utilized to generate electricity. Many promising developments have been occurred in the field of wind energy converters to improve its efficiency. A wind turbine equipped with a brimmed-diffuser shroud is called a Wind-Lens turbine.

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Loud Speaker Driven Thermo Acoustic Refrigeration[ ]


Thermo Acoustic refrigeration is a phenomenon in which sound waves having high intensity is utilized in order to produce a cooling effect. This cooling effect is produced with the help of heat transfer from one point to other with the help of sound waves. These sound waves are send inside a pressurized gas tube. The energy consumption is very less and cost of construction is low when compared to conventional methods. One of the most important advantage of thermo acoustic refrigerator is that it does not requires any refrigerants. The working fluid used in thermo acoustic refrigerator is air. We can also operate it with the help of Inert gases. Thermo Acoustic refrigerator does not requires any moving parts. In this paper we are dealing with the working and construction of a Loud Speaker Driven Thermo Acoustic Refrigerator.

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Performance Enhancement of a Domestic Refrigerator using Phase Change Materials[ ]


This work investigates about the performance enhancement of a domestic refrigerator by incorporating phase change materials (PCM) inside the evaporator. A U-shaped PCM box is used to contain the PCM, to improve its efficiency and to provide a storage capacity allowing several hours of refrigeration without power supply. This system has been tested with water, ethylene glycol mixture and eutectic solution as PCM. It has been found that the addition of PCM results in an enhanced conduction heat transfer from the PCM to the evaporator coil. The result shows that the performance of the system has improved upto 19%. The energy stoted in the PCM is yielded to the refrigerator during the off time and allows for several hours of continuous operation without power supply. This model shows a 5 to 19% increase in coefficient of performance(COP) and significant decrease in no.of starts and stops of the compressor and consequently of the temperature fluctuation inside the evaporator. The experimental studies with water, ethylene glycol mixture and eutectic solution have confirmed these results.

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EFFECT OF PIN FINS IN HEAT RECOVERY SYSTEM FOR IC ENGINES[ ]


The increasingly worldwide problem regarding the increasing needs of energy and its shortage. The IC engine which is the major consumer of energy has an efficiency of only 30% to 40% in converting heat into work output. About 30%heat is being carried away by cooling systems and 30% to the exhaust system. Efforts are made to catch this 30 % energy of exhaust gases. If this waste heat energy is tapped and converted into usable energy, the overall efficiency of an engine can be improved. A waste heat recovery system has the ability to convert some of this waste heat into electricity. So heat recovery from the exhaust is one of the simple methods to reduce energy wastage. For any heat recovery system heat exchangers are an integral part. Here a basic attempt is made to analyze the thermal and hydrodynamic effect of pin fins in a heat a heat recovery system using CFD tool ANSYS Fluent 14.5. The results show that the use of pin fins enhanced the heat transfer with little sacrifice in pressure drop. Through this analysis we can see a satisfactory improvement in waste heat recovery from exhaust gas from an IC engine.

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Stress Analysis of Metallic Pressure Vessels with Circumferential Mismatch using Finite Element Method[ ]


Nonlinear finite element analysis (FEA) has been carried out on cylindrical and spherical pressure vessels having mismatch in the circumferential joint, with equal and unequal shell thickness/radius on either side of the joint. HSLA 15CDV6 is used as the vessel material, having application in aerospace structures. Stress factors are compared for cylindrical and spherical shell with different mismatch. Deformations and elastic stress distribution along meridional distance is presented graphically for different thickness ratio.

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A Study on Solutions of Perturbed Equations[ ]


Perturbation means a small disturbance in a physical system. Mathematically “Perturbation method” is a method for obtaining solution to complex equations (algebraic or differential) for which exact solution is not easy to find. In this paper, we discuss the applicability of asymptotic expansion method for singularly and regularly algebraic and ordinary differential equations. At first, we apply the method of asymptotic expansion for regular and singular pertubation equations (algebraic and differential) containing e (0

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