ICEDET 2016- International Conference on Emerging developments in Engineering

"ICEDET 2016 Conference Papers "

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DRAG REDUCTION OF WIND TURBINE BLADE TO ENHANCE AERODYNAMIC PERFORMANCE: A NUMERICAL STUDY[ ]


The scope of present work is mainly on investigating passive flow control techniques to provide wind turbine developer with efficient ways to make them to improve the energy that can be utilised by a wind turbine. In present work we aimed on searching the way of improve the aerodynamic performance of HAWT blade aerofoil. The wind energy is recognised as one of the most prominent energetic variants of the future because the wind resources are easily available. So from here we can conclude that research in this field must be necessary and interdisciplinary. The objective of this investigation is to enhance the wind turbines overall performance and increase their working capacity by doing complete flow or partial flow attachment. By doing CFD analysis for a wind turbine blade, present investigation is focused to analyse the flow around the wind turbine blade. Current efforts focus on increasing the aerodynamic efficiency of HAWT blade having S820 aerofoil using passive flow separation control technique.

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Review on compare of wind energy utilization in South Asia[ ]


Wind energy is a renewable energy can play a stratrgic role in south Asian country’s in meeting the country growing energy demands. Due to huge population and economic growth, the demand for power and energy is increasing rapidly in most Asian countries especiallyin India, Bangladesh and Pakistan where the power generation is based mainly on fossil fuel. Power generation from renewable energysources especially wind energy has not been well utilised in South Asia. In comparison, European countries and countries in NorthAmerica have made significant progress in wind energy utilisation for power generation. Scant information on utilisation of renewable energy for power generation in Bangladesh, Pakistan and India is currently available in the public domain. Therefore, the primaryobjective of this study is to undertake a comparative analysis of wind energy utilisation for power generation in South Asian countries.The analysis includes current power generation by fuel types and the government initiatives and policies on wind energy utilisation. Thestudy indicates that India is significantly ahead in wind energy utilisation compared to other two countries Bangladesh and Pakistan. Themain obstacle for utilising wind energy is the lack of clear policy and government initiatives. However, all three countries have ambitions plans for wind energy utilization in the future.

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Can Leasing of Automobile be a Sustainable Way Out?[ ]


This has been seen in last few years, that government is searching a way out for the control of air pollution caused due to automobile transportation. Various steps are taken by the government and National green tribunal (NGT) to cope up with the menace of air pollution. At the same time academia and Industry is also focusing on the issue largely through adopting various business models. This paper is based on the review of various business models adopted by industry and there pros & cons. In this paper focus is on the less talked business model i.e. leasing of car, which is making its ground in Indian automobile market. The paper attempts to highlight the benefit of leasing in sustainable development of society and review the working of leasing operator in India.

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Thermal Characterization of CBPD Filled and Kevlar Fiber Reinforced Homogenous and Graded Composite Material[ ]


This research monograph reported the thermal behavior of Kevlar fiber reinforced/cement by pass dust (CBPD) filled vinyl ester resin based homogeneous and graded composite materials. The designed composites characterized for their thermal behavior via Thermo-Gravimetric Analysis (TGA) method. The thermal behavior of the composites could easily be understood by dividing the TGA curve in three major temperature stages. The stage-1 has the part ranging from room temperature to 300°C, stage-2 ranging from 300-400°C and stage-3 has the part ranging from 400-500°C. The TGA shows that major weight loss occurs in stage-2 and with increase in the CBPD content thermal stability of both the homogeneous and graded composite increases.

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Simulation of Fixed Bed Heat Regenerator using Wavelets[ ]


Fixed bed regenerators are the heat exchangers used for transferring heatfrom hot fluid to cold fluid using solids as intermittent storage medium. The governing equations are solved by Finite Difference Method (FDM) and Wavelet method. Temperature profiles and breakthrough curves for fixed bed regenerator are drawn for both the methods. In this paper it is observed that the results obtained by Wavelet based method is more accurate and takes less computational time as compare to Finite Difference Method.

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STUDY OF BOUNDARY LAYER PHENOMENA FOR THIXOTROPIC AND ANTITHIXOTROPIC FLUID: A REVIEW[ ]


The study of boundary layer formation for thixotropic and antithixotropic fluid for various geometries is being focused in this paper, as less studies is being focused on the boundary layer development in thixotropic and antithixotropic fluid. As the viscosity of a shear thickening fluid decreases on decreasing shear rate, viscosity at the edge of the boundary layer is zero. In shear thickening fluid the flow out with the boundary layer can remain unaffected by the motion of the wall. The fluid has developed an internal slip surface separating non-communicating regions, due to this reason the study of thixotropic and antithixotropic fluid is become essential.

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Design and fabrication of an innovative Planetary wheel chair for rural Area[ ]


Life of differentially able people is very difficult especially while moving from one place to another in rural area. Normally all the wheel chairs are available in the market are designed for smooth surface, but 75% of people with disabilities live in the rural area where uneven surface are common. The present work deals with the design and fabrication of an innovative planetary wheel chair. The use of planetary wheel reduces the impact due to uneven surface and inclined plane. The model of the planetary wheel chair are designed and simulated in the CREO and ANYSIS 14.0. The simulated model of wheel chair is validated under actual loading condition.

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Thermal Performance Analysis of a Honeycomb Regenerator[ ]


Thermal regenerators are heat exchangers in which heat is absorbed and released using high heat capacity materials. In fixed bed regenerators the bed absorbing and releasing thermal energy is fixed and the hot and cold fluid streams are alternatively passed through the bed. Honeycomb regenerators find their wide applications in regenerative burners in large number of industries to preheat combustion air with exhausted flue gases and their unsteady conjugated heat transfer was investigated by two-dimensional numerical simulations in the literatures. In the present work two dimensional simulation has been carried out for predicting temperature profiles andthree-dimensional simulation has been carried for predicting thermal efficiency and the same has been validated with the available literature.

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Comparison of Thermohydraulic Performance in Heat Exchanger Tube with Inserts[ ]


Heat transfer enhancement by modifying the surface of heat exchanger has become a very interesting area of research for the researchers. The heat exchanger is the most commonly used thermal device in different thermal and mechanical systems such as Automobiles, Chemical industries, Refrigeration and Air conditioning systems, etc. Hence, many techniques have been investigated on enhancement of heat transfer rate and decrease the size and cost of the involving equipment especially in heat exchangers. This paper compares some of the very similar kind of experimental work carried out by some of the researchers in this area by taking air as the working fluid in heat exchanger tube. The comparison is made between some of the work on “core fluid disturbance”, “disturbance by surface modification” and “combination of core and surface disturbance”. The comparison is made on the basis of ‘heat transfer, friction factor, and thermal performance factor’ under the turbulent flow regime. On comparison and graph obtained it is found that the Heat transfer and friction factor is higher in case of Conical ring with twisted tape insert and the thermal performance factor is higher in case of perforated twisted tape and twisted tape separated from the wall.

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Conventional Energy Signature Analysis of Power System Condition[ ]


ConventionalPower system condition is a complex research issue from the point of view of connectivity and multi parameter effect. Events in power system have peculiar signature in terms of one or more transforms. Hybrid approach of analyzing are modernized efforts to have more concrete decision making as far as intelligent tripping is concerned. Features of Fuzzy Logic when augmented by wavelet prove more beneficial to analyse composite events and clarity. Human rules, linguistic sense make it easy to design and formulate various conditions observed in power system. This paper highlights integrated signature analysis of voltage and current with the help of hybrid fuzzy wavelet based diagnostic technique.Regular monitoring of wavelet coefficients of current, voltage and power signatures along with their degree of severity reveal advanced health of interconnected power system. This paper proposes Integrated approach of Signature analysis of current for determination of health of power system. This method is popular for transformer, motors but rarely cited for power system due to variability of connection and no unified approach. Results obtained are good estimate for selective discrimination between degree of voltage and current unbalances existing in power system.

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Effect of Fiber Loading & Walnut Filler on Mechanical Properties of Sisal-Kevlar Hybrid Epoxy Composite[ ]


In the current research, the effects of walnut filler and fiber loading on mechanical properties of sisal-kevlar fiber based hybrid polymer composites were evaluated. Composites were fabricated by simple hand-lay-up technique. This research work describe the development and charcterization of new set of bidirectional hybrid polymer composite consisting of sisal-kevlar mat as reinforcement, walnut shell as filler and epoxy as matrix material. Experiments are carried out to study the influence of fiber loading and natural filler on mechanical behavior of these composites. Result shows the considerable effect of fiber loading and filler on the mechanical properties of composites. Sample KSWC3 (6 wt % sisal + 6 wt % Kevlar + 3 wt % walnut filler) gives optimum results among all the composites which are fabricated in this work.

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Heat Transfer and Pressure Drop Characteristics In A Duct With Roughened Absorber Plate Having Rectangular Transversed Rib Using ANSYS[ ]


The heat transfer coefficient of a solar air heater can be increased by providing artificial roughness on the underside of the absorber plate. A computer simulation in ANSYS has been carried out in the present work to study the heat transfer and pressure drop by using transverse ribs in the form of rectangular protrusion on the absorber plate of a solar air heater under simulated conditions. The computer simulation encompasses the Reynolds number from 4000 to 16000, relative roughness pitch from 6 to 25 and relative roughness height equal to 0.044 m. The effect of these parameters on heat transfer coefficient, pressure drop and thermal efficiency has been studied. It is found that at relative roughness pitch of 10, the heat transfer, pressure drop and thermal efficiency are maximum.In the present work, Nusselt number and friction factor correlation developed as a function of Reynolds number at p/e =10 are given below

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Lubrication Analysis of Strip Rolling with Oil-in-Water (O/W) Emulsions[ ]


An Isothermal analysis of lubrication mechanism of strip rolling with oil-in-water emulsion, have been carried out. In this analysis, condition viz. smooth roll and strip as well as roughness are considered. Numerical study on the oil concentration effects of O/W emulsion on parameters viz. pressure and film thickness are found out and discussed. The dynamic concentration theory and extended Reynolds equation based on effective viscosity for binary medium are adopted and a co-relation between both theories is derived. The numerical results for the pressure variation towards inlet zone at different operating parameter like variation in concentration of emulsion supplied and variation in mean roll and strip speeds are found out and compared.

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ANALYSIS OF CSTR TECHNIUQUE FOR STUDY OF NATURAL CONVECTION OVER HORIZONTAL SMOOTH AND GROOVED SURFACES[ ]


This study investigates natural convection with smooth and grooved surface plates in various combinations. A total of five cells were used in the simulation. Both the global Nu and the Nu for each plate (or the associated boundary layer) are measured. The results reveal that the smooth plates are insensitive to the surface (grooved or smooth) and boundary conditions (i.e. nominally constant temperature or constant flux) of the other plate of the same cell. The heat transport properties of the rough plates, on the other hand, depend not only on the nature of the plate at the opposite side of the cell, but also on the boundary condition of that plate.

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Performance Enhancement Of Solar Photovoltaic Thermal Energy Collection (PV/T) System With W-Shaped Rib Rouhgness[ ]


In this work, a parametric study of the enhancement achieved in electrical (cell) efficiency , thermal efficiency and the overall performance enhancement as a result of providing w-rib roughness on the underside of the absorber plate. The performance parameters (enhancement of electrical efficiency, thermal efficiency and overall performance) have been evaluated based on mathematical simulation of PV/T system as function of relevant geometrical parameters, namely relative roughness pitch ,relative roughness height and angle of attack and design parameters, namely temperature rise and insolation. Results reveal that there is substantial enhancement in the performance parameters brought about the w-rib roughness as compared to those obtained with smooth absorber plate.

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Unsteady CFD Analysis of Regenerator[ ]


The paper aims to study the thermal characteristics of the regenerator and investigate the effects of various factors on the thermal characteristics of the fixed bed regenerator. In the present work various factors affecting the thermal characteristics of the regenerator such as, bed height/length, regenerator diameter, particle diameter, heat storage capacity, switching time, residence time, and gases flow direction are numerically investigated. CFD analysis is done to understand the temperature and fluid flow variations in the thermal regenerator. Commercial Ansys Fluent software is used for the analysis.

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OPTIMIZATION OF CUTTING PARAMETERS FOR IMPROVING SURFACE ROUGHNESS OF STAINLESS STEEL D3 WITH ABRASIVE ASSISTED DRILLING[ ]


High strength, low thermal conductivity, high chromium and high work hardening tendency of Stainless Steel D3 are the main factor that makes them machinbility very difficult. This study is concerned with optimization of cutting parameters for improving the surface roughness of Stainless Steel D3 with Silicon Oxide and Alumina Oxide abrasives. The experimentation includes drilling of D3 steel with abrasives having mesh size of 1500, 1200, 800 with 35%, 25% and 20% slurry concentrations. Parameters such as abrasive size, abrasive type, slurry concentration, and spindle speed and feed rate is considered. For design of experiments Taguchi L18 array is used with MINI Tab 16 software and also analysis of variance is used for calculating the percentage contribution of each parameters. The result indicates that abrasive size and type of abrasive are the most significant factors which affect the surface roughness D3 steel.

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Sheet Metal Thickness Measurement Using Capacitive Transducer in LabVIEW[ ]


The present work is focused on design and development of a capacitive transducer able to measure thickness of sheet metal at the places where ordinary instrument cannot reach. The instrument converts thickness of sheet metal into change in value of dielectric constant and show capacitance of the capacitor. Change in capacitance is the measurement of sheet metal thickness. The whole setup is control by LabView for accurate and error free measurement for this purpose and application programme is design to produce the output in the required format as a result of repeated observations. The whole setup is found repeatable and reproducible measuring system.

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Parameters Optimization for Gas Metal Arc and Gas Tungsten Arc Welding of Aluminium Alloy 31000-H2 (IS 737) by Taguchi Design of Experiment Technique[ ]


Welding is widely used by manufacturing engineers and production personnel to quickly and effectively set up manufacturing processes for new products. Manufacturer face the problem of control the process input parameters to obtain a good welded joint with the required weld quality. Traditionally, it has been necessary to study the weld input parameters for welded product to obtain a welded joint with the required quality. It requires a time-consuming trial and error development method. The purpose of this study is to propose a method to decide optimal settings of the welding process parameters in Gas Metal Arc and Gas Tungsten Arc welding. Properties include the Tensile strength, Impact strength, Hardness, etc also influenced process parameters. In this study which parameter is most effectively effect the weld strength. Weld strength varies under various conditions. By using Taguchi and ANOVA technique an optimal solution is find out, which provides us an optimal results of the varying condition.

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Testing of Mixed Biodiesel on VCR Engine formed with Neem Oil and Sesame Oil[ ]


Stringent emission norms, Energy Crisis and environment degradation due to pollutants from automotive vehicles lead us to find the suitable alternative for petro-diesel. Non edible and edible grade vegetable oils are predominant feedstock for biodiesel production. Obviously biodiesel production from edible oil results in the high price of biodiesel. In some countries, non-edible oils such as Jatropha curcas or waste cooking oil are preferred due to their low price. Realistically, non-edible oils only cannot meet the demand of energy consumption therefore; it has to be supplemented from some edible oils. Operationally, biodiesel blends perform very similar to conventional diesel in terms of performance without major modifications of engine because the properties of biodiesel and conventional diesel are similar. The performance of blends of biodiesel is compared with diesel.

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Experimental Investigation of SI Engine Performance using Ethanol-Gasoline Blended Fuels[ ]


These In this study, the effect of unleaded gasoline and unleaded gasoline blended with 5%, 10 % and 15% of ethanol on the performance of a spark-ignition engine were experimentally investigated. Performance tests were conducted for fuel consumption, engine torque, brake power, brake thermal efficiency and brake specific fuel consumption, using unleaded gasoline-ethanol blends with different percentage of fuel at wide open throttle opening position and variable engine speed ranging from 900 to 3000 rpm. The results showed that blending unleaded gasoline with ethanol increase the brake power, torque, brake thermal efficiency and fuel consumption, while it decreases the brake specific fuel consumption. The 15 vol % ethanol in the fuel blend gave the best results for all measured parameters at all engine speed.

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Investigation of Friction stir welded joint of AA6061 material using Altair Hyper Weld[ ]


In the present work, three dimensional nonlinear thermal numerical simulations is conducted using Altair Hyper Weld Virtual experimental software module for the friction stir welded butt joint of AA6061 (aluminium alloy) material plates. FSW welding simulations were performed for seven different tool rotational speeds from 600 rpm to 1800 rpm with a step of 200 rpm and temperature distribution is analyzed. Result shows that the temperature field in the FSW process is symmetrically distributed along the welding line, increasing rotational speed increases temperature distribution. Virtual experimental data indicates that on the advancing side peak temperature is higher than the retreating side during the weld process. It is also noticed that the temperature in the FSW process is symmetrically distributed along the welding line.

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PERFORMANCE COMPARISION BETWEEN RECTANGULAR PARALLEL FLOW AND COUNTER FLOW MICROCHANNEL HEAT EXCHNAGER[ ]


The comparison study for heat transfer rate, effectiveness, performance index and effectiveness with varying thickness of separating wall are calculated. The rectangular type 3D isosceles right triangular microchannel is taken for the study. The water is taken as working fluid for both hot and cold fluid. By using the single phase liquid flow the thermal performance of microchannel heat exchanger is analyze. By solving the energy, continuity, and momentum equations the results are achieved all the equations are solved in FLUENT 16.0.

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STUDY OF COMPUTERIZED MAINTENANCE MANAGEMENT SYSTEM (CMMS) AND COMPUTER AIDED MAINTENANCE PLANNING (CAMP) IN PRODUCTION SYSTEM[ ]


Application of Computerized Maintenance Management System (CMMS) and Computer Aided Maintenance Planning (CAMP) in production system is quickly and efficiently deciding, planning and organizing various jobs for effecting systematic plant maintenance. Because of the vast quantity of technical and economical data involved in maintenance management, computer support is very desirable. By applying Computerized Maintenance Management System (CMMS) and Computer Aided Maintenance Planning (CAMP) in production system we will observe that it may be increase in productivity save time. Increase efficiency, smooth flow process.

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Thermal Analysis of Power Generation through Solar Pond in Dwarahat[ ]


In the present work, thermal analysis is done for the power generation of solar plant in dwarahat. A solar pond is created in dwarahat and power generation is calculated by mathematical formulation, Matlab computer software has been used to build a multi-scripts programs to solve ordinary differential equations by finite difference method for steady state models. For the performance of the solar pond, the first task is to determine the manner in which the radiation incident (solar radiation geometry) upon the solar pond is reflected, absorbed and transmitted through the water.The solar hour angle ω expresses the daily rotation of the earth. As the earth rotates 360° within 24 hours, every hour adds another 15° to the solar hour angle.The transmissivity based on absorption can be obtained by assuming that the attenuation due to absorption is proportion to the local intensity (Bouger’s Law).According to a solar pond location, the sun path in the sky is changed seasonally thus the sun’s altitude and azimuth angle and the daily sunshine period are varied and cause a great effect on the amount of the incident solar radiation and then on the performance of the solar collector.The calculation of the temperature distribution in a solar pond is rather involved since the pond consists of three zones.The single input (Latitude angle) is used to calculate the solar radiation in Dwarahat (India). The output of this script is done on the bases of solution given by Rabl and Knooi.

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Exhaust Emissions of Ethanol-Unleaded Gasoline blends in Spark Ignition Engine[ ]


In this study, the effect of unleaded gasoline and unleaded gasoline blended with 5%, 10 % and 15% of ethanol on the exhaust emission of a spark-ignition engine were experimentally investigated. Exhaust tests were conducted for carbon mono oxide (CO), carbon dioxide (CO2), unburn hydrocarbon (HC) and nitrogen oxide (NOx), using unleaded gasoline-ethanol blends with different percentage of fuel at wide open throttle (WOT) opening position and variable engine speed ranging from 900 to 3000 rpm. The results showed that blending unleaded gasoline with ethanol decrease the concentration of carbon mono oxide, nitrogen oxide and unburn hydrocarbon, while it increase the concentration of carbon di oxide. The 15 vol % ethanol in the fuel blend gave the best results for all measured parameters at all engine speed.

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A Review on Solar Air Heater Performance Using Different Artificial Roughened Rib[ ]


Solar air heater has low thermal efficiency as heat transfer coefficient is poor between absorber plate and working fluid (air). In this study, a review on solar air heater performance is presented. For improving heat transfer in solar air heater, several researchers recommended use of Artificial Roughness Element in rib and fine wire form. Use of Artificial Roughness Element helps in breaking laminar sub layer developed on surface of absorber plate. Different Roughness geometries are studied and their results are observed. This review presents a detail analysis of performance factor of solar air heater with Artificial Roughness Element. An examination of shape, size and orientation of Artificial Roughness Element is presented.

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SPALART ALLMARAS UNSTEADY FLOW INVESTIGATION USING COMPUTATIONAL FLUID DYNAMICS FOR DRAG AND LIFT FORCE OF AN AIRFOIL[ ]


The studies of drag and lift are subjects of importance in fluid dynamics for the engineering benefits that they can offer are highly significant. This paper presents SpalartAllmaras flow investigation. In this paper, a computational fluid dynamics CFD model is studied for unsteady external flow.Drag and lift experienced by a solid object in a flowing fluid are the resultant resistance forces established by the components of the resultant aerodynamic force along and normal to the free stream velocity respectively. In automotive design, good aerodynamic consideration aims for the least drag to achieve efficiency, and also to optimize negative lift particularly in motor sport.

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Numerical investigation of thermo-hydraulic performance in rib roughened fin under forced convection[ ]


In this paper numerical investigation of Thermo-Hydraulic performance from a rib roughened fin subjected to forced convection. Numerical data pertaining to heat transfer and friction from a rib roughened fin are generated by carrying out numerical simulations under the varied fluid flow conditions. Using a validated numerical model, the data pertaining to fluid flow and temperature distribution for different rib pitch to rib height ratio (P/e) are obtained by varying the Reynolds Number from 500 to 5000. The thermal and hydraulic performances of rib roughened fin are discussed with the help of Nusselt Number and friction factor plots. The results obtained from the rib roughened fin geometry are compared with that of a plain fin to determine the effectiveness of test fin in extracting heat from its base under similar operating conditions. The rib roughened fin having P/e of 6 which bring out maximum enhancement in the heat transfer and friction.

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NUMERICAL INVESTIGATION OF HEAT TRANSFER ENHANCEMENT OVER RECTANGULAR PERFORATED FIN[ ]


In this paper, numerical study has been performed to investigate the heat transfer and friction from a perforated fin subjected to forced convection. Thermal and fluid dynamic performances of extended surface having perforations of rectangular cross section are investigated. RANS based k–ε turbulence model is used to calculate the fluid flow and heat transfer parameters. Flow and heat transfer parameters are presented for Reynolds numbers from 2000 to 8000 based on the fin thickness. Numerical results obtained from the perforated fin geometry are compared with that of a plain fin to determine the heat transfer enhancement of test fin in extracting heat from its base under similar operating conditions.

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THERMO-HYDRAULIC PERFORMANCE ASSESMENT OF HEAT EXCHANGER TUBE WITH PERFORATED HOLLOW CIRCULAR DISK INSERT[ ]


Heat transfer enhancement by creating turbulence in the physical behavior of fluid flow inside the heat exchanger has become a very interesting area of research for the researchers. Although very significant results has been achieved in the thermal performance of heat exchangers, especially in the range of lower Reynolds number, but still these passive approaches of heat transfer enhancement is not effective for the range of higher Reynolds number. In the present work the effect of perforated circular disk turbulators on heat transfer, friction factor and thermal performance of heat exchanger is evaluated experimentally. The different parameters used for the experiment include fixed diameter ratio (d/D=0. 8), pitch ratios (l/D= 1, 2 & 3) and perforation Index (Pa/Ta = 0%, 8%, 16% & 24%). The experiment is done in the range of Reynolds number lying from 6,500 to 26,800. On the basis of experimental observation, there is 2.2-3.54 times improvement in heat transfer and around 1.18-1.47 times improvement in thermal performance factor over smooth tube heat exchanger.

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Design of 5kw Pico Hydro Power Plant Using Turgo Turbine[ ]


Hydro power plant is used hydraulic energy of water.the hydraulic energy is then converted in to mechanical enegy using turbine and then further mechanical energy converted to electrical energy with the help of alternator. Hydro energy is widely used and useful in small, remote areas that require only a small amount of electricity. pico hydro are widely used in rural areas electrification.The establishment cost of the pico and micro hydro is very low.So now a days pico and micro hydro widely used in the rural areas.The main advantage of micro and pico hydro plant is that its low cost and environment friendly .This paper represent the pico hydro installation in rural areas. The Turgo turbine is used for pico hydro power gener ation. The initial cost of the turbine is low and is similar to pelton wheel.

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A Comprehensive Review onHeat Transfer and Fluid Flow Charactersticks of Heat Exchanger Tubes with Inserts[ ]


A Heat exchanger is a steady flow device in which two or more fluids flow through the same device and thermal energy is transferred from high temperature fluid to low temperature fluid by heat transfer.Heat transfer enhancement techniques are one of the most significant tools to deliver energy in different operations. In this paper a brief introduction is given about different techniques used to enhance the heat transfer in a heat exchanger, and some most effective insert geometries has been presented.

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Thermal Analysis of Piston of IC engine[ ]


Piston is a reciprocating part of engine which converts thermal energy into mechanical energy. There is thermo-mechanical load on the Piston. There is fatigue failure due to cyclic thermal and mechanical loading .To increase the life of the piston ,there has been more research going on in modifying the design of the piston ,changing the material and also changing the method of the manufacturing. In this paper thermal stress distribution is shown for the simple piston and reduced skirt length piston. by changing the geometry of the piston and it is suggested that which piston is better for same thermal load. Steady state thermal analysis of the Piston have been done in ANSYS 14.5.

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Economical analysis of a solar water heating system refurbishment in student hostel[ ]


Solar water heating system (SWHS) is one of the common application of solar thermal systems, but it is still not a common asset for a common man due to its high initial cost. In this paper, the economic feasibility of a solar water heating system is carried out of proposed systems one of which is SWHS having flat plate collector and the other one is SWHS having evacuated tube collector for a student hostel in DIT University, Dehradun. The effect of discount rate, useful lifetime and capital cost on the variation of NPV and benefit to cost ratio is discussed in this paper. These variation is also compared for both types of systems, i.e sytems having FPC and system having ETC. this economic feasibility is checked by using the current cost of the equipments and the benefits in terms of subsidy provided by the Government of India.

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Modern Diagnostic Tests for Condition Monitoring of Power Transformers of Koteshwar HEP[ ]


Power transformers are the most vital component of the power transmission and distribution infrastructure. Transformer failures cost enormous amounts of money, in the form of unexpected outages and unscheduled maintenance. All electrical utilities therefore aim to avoid these failures/outages and try to save money by usage of condition based maintenance techniques in addition to the time based practices. One of the most crucial factors determining the lifetime of a transformer is condition of insulation. Routine tests are conducted on transformers to determine the condition of power transformers. Modern insulation diagnostic tests are able to provide us the information regarding present condition of the transformer. Therefore combination of the routine measurements tests with modern diagnostic techniques helps to get a better picture of the condition of insulation. The present paper discusses the modern insulation diagnostic techniques being conducted at THDCIL Koteshwar HEP (4X100 MW) for Condition Assessment of Generator Transformers.

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Automatic Waste Water Cleaning Equipment[ ]


In this project the proposal concept is to replace the manual work in drainage cleaning by automated system. We know that water has a great importance in human being life, the water flow in drain full of wastes like polythene, bottles etc. The drains get blocked due to these wastes in water. Now a day’s even through mechanical machine plays a vital role in all industrial applications in the proper disposal of sewages from industries and commercials are still a challenging task. Drainage are using for the disposal and unfortunately sometimes there may be loss of human life while cleaning the blockage in the drainages. The government also spends too much money to clean the drainages. To overcome this problem and to save the human life we implement design “Drainage water cleaner system”. We designed our project to use this in efficient way to control the disposal of wastages and with regular filtration of wastages.This machine also uses solar voltaic cell for power supply.

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Big Data Security - The Big Challenge[ ]


In this paper we discuss the issues related to Big Data. Big Data is the vouluminous amount of data with variety in its nature along with the complexity of handling such data. In addition to the problem of mining information from Big Data, privacy is a big challenge for big data. In this paper we discuss the issues concerning privacy of this data and some of the existing techniques to ensure privacy of the data.

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Comparitive Study of Experimental & CFD Analysis of Thermal Regenerator[ ]


The paper aims to study the comparative study of experimental and CFD analysis of packed-bed thermal regenerator. In the present work the previously published experimental study of regenerator with D/dp > 15 are simulated and are compared with the simulated results of CFD. A very good agreement is seen between both the results in all flow regimes. Commercial Ansys Fluent software is used for the analysis.

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