Browsing by Author "Thavai, Rahul"
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Item CFD analysis on helical baffles on shell and tube type heat exchanger(AIKTC, 2019-05) Thavai, Rahul; Rumane, Abdullah [15ME36]; Shetty, Sanjoth [15ME55]; Singh, Vishal [15ME58]; Gupta, Vipin [16DME138]In present day, shell and tube heat exchanger is the most common type heat exchanger widely used in oil refinery and other large chemical process, because it suits high pressure application. The aim of this work is to design shell and tube type heat exchanger with a continuous helical baffle and comparing with segmental baffle with CFD analysis using ANSYS FLUENT software tools. The model contains 7 copper tubes each having 20mm external diameter and 17mm internal diameter, length 600mm and inner diameter of steel shell is 90 mm and outer diameter 110mm. 7 tubes are held by a continuous helical aluminium baffle. All the models are design by using AUTODESK INVENTOR software tools. In this research how the pressure drop and overall heat transfer coefficient varies due to change in the inlet velocity of the shell side has been studied. The flow pattern in the shell side of the shell and tube type heat exchanger with continuous helical baffles are forced to be rotational and helical due to the geometry of the continuous helical baffles, which results in a significant increase in heat transfer coefficient per unit pressure drop in the heat exchanger. Keywords: Continuous helical baffles, Shell and tube heat exchanger, Overall heat transfer Coefficient, Pressure drop, CFD.Item Design and analysis of BEM type heat exchanger(AIKTC, 2021-05) Thavai, Rahul; Shaikh, Raihan Noor Mohd (18DME48); Shaikh, Shoaib Ayub (18DME49); Memon, Abdul Gani Irfan (18DME25); Quraishi, Md. Rehan Md.Riyaz (18DME35)The oil and gas field deals with various processes such as refining, chemical mixings and blending, liquefaction, purification, storage of fluids and chemicals under stipulated pressure and temperature requires boilers, tubes and pipes, heat exchanger pressure vessels, etc. These have been a very important part of technical and technological systems such as chemical and reactive processes in Oil and gas field. This project work deals with a detailed DESIGN AND ANALYSIS OF BEM TYPE HEAT EXCHANGER taken as a problem definition from client Al Hammra – U.A.E. A detailed design of various parts of vessels like shell, closure, 55 support, flanges, nozzles etc. Design is carried according to rules of ASME code section VIII; Division I. The ASME is an American Society of Mechanical Engineers that regulates the design and construction of boilers and pressure vessels. The BPVC is a standard that provides rules for the design, fabrication and inspection of boilers and pressure vessels. Code provides rules that permit the use of materials and alternative methods of construction that are not covered by existing BPVC rules. The analytical design as per client Al Hammra – U.A.E design data and general notes have been analyzed and validated using Software tools such as PV-elite, Compress or ANSYS, and detailed modelling using Auto- CAD tool. It also deals with the study of various parts like flanges, support etc. Various methods of fabrication and testing such as LPT, RT, and Hydro Test are also included.Item Design and analysis of heat exchanger(AIKTC, 2017-04) Thavai, Rahul; Ansari, Mohd. Saif; Chougle, Zuzer; Mishra, KuldeepTo introduce our project title, the first to introduce is the component on which we worked on, i.e. Heat Exchanger. A Heat Exchanger is a device used to transfer heat between one or more fluids. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.Item Design and analysis of pressure vessel(AIKTC, 2020-05) Thavai, Rahul; Choudhary, Zahid Aslam (17DME106); Ansari, Fazal Mumtaz Ahmed (17DME109); Khan, Ismail Aslam (17DME117); Khan, Mohd Aquib Ashfaque (17DME120)The oil and gas field deals with various processes such as refining, chemical mixings and blending, liquefaction, purification, storage of fluids and chemicals under stipulated pressure and temperature requires boilers, tubes and pipes, heat exchanger pressure vessels, etc. These have been a very important part of technical and technological systems such as chemical and reactive processes in Oil and gas field. This project work deals with a detailed design and analysis of Sulphuric acid tank taken as a problem definition from client Al Hammra – U.A.E. A detailed design of various parts of vessels like shell, closure, support, flanges, nozzles etc. Design is carried according to rules of ASME code section VIII; Division I. The ASME is an American Society of Mechanical Engineers that regulates the design and construction of boilers and pressure vessels. The BPVC is a standard that provides rules for the design, fabrication and inspection of boilers and pressure vessels. Code provide rules that permit the use of materials and alternative methods of construction that are not covered by existing BPVC rules. The analytical design as per client Al Hammra – U.A.E design data and general notes have been analysed and validated using Software tools such as PV-elite, Compress or ANSYS, and detailed modelling using Auto-CAD tool. It also deals with the study of various parts like flanges, support etc. Various methods of fabrication and testing such as LPT, RT, and Hydro Test are also included.Item Design and analysis of static equipment(AIKTC, 2021-05) Thavai, Rahul; Shaikh, Mohd Soohaib (15ME103); Shaikh, Abdullah Shadab (15ME97); Deshmukh, Mohammed (14ME12); Mansoori, Yasin (14ME91)The objective of this thesis is to learn and understand how a facility of manufacturing firm use its static equipment. This project is conducted at NILSAN NISHOTECH S.PVT. LTD, KOPARKHAIRNE MIDC where various pressure vessels, agitated vessels, chemical reactors, chimneys, heat exchangers, storage tank etc. like products are manufacturing company located at New Mumbai. In Mechanical Engineering the word “Static Equipment” is given to any equipment which is in Static mode of motion or does not have rotating part. Application of Static Equipment is broadly used in Process Industry which cover, Refinery, Chemical & Fertilizer Plant. The purpose of Static Equipment is to hold the fluid generally at a pressure in an enclosed container, for storage or for any reaction/process to take place in the container. Large volume of liquid at atmospheric pressure is store in “Tank”. For this general idea we have come on to this two equipment from our client side one is a sample cooler and a storage tank A Design is proposed by using the steps involved in making the equipment, which is then going to be tested after fabrication. The proposed design involves optimizing the standards and norms of ASME which have high interrelationship and close to each other. The fabricated part is further evaluated by Quality Engineers. After Inspection of the product it is fitted in the facility and packaged to the Client Safely.Item Design of semi-autonomous amphibious rover(AIKTC, 2017-05) Thavai, Rahul; Siddiqui, Ajnanuddin (13ME20); Khan, Fahad (13ME80); Mukadam, Shafique (13ME107); Qureshi, Abdul (14DME159)An amphibious Rover (or simply amphibian), is a vehicle that is a means of transport, viable on land as well as on water. We have made amphibious rover that can work on both land as well as on Water by simply providing it with a waterproof hull or raft skirt and perhaps a propeller. Design is made like an army tank on inventor software by using certain set of parameter such as load to be handled, dimension constraint, speed etc. Design of each and every component such as main chassis, motor, shock absorber, propeller etc. and the analysis of the same are done using Autodesk inventor software. Fabrication of chassis and assembly of various components is done is shown in subsequent section below and analysis is also done and it is found that our design is safe. Calculation of hull dimension using standard method of design of catamaran type hull and did the modeling of hull on inventor software of the same. Main objective of this Project is to make a rover that can work on both lands as well as on Water. The Add-ons such as heat Sensing Camera, Close Circuit Camera, Mechanical arms can also be added to fulfill the desire Requirement of the Rover. To make Rover that can be used as Life Guard on beaches.Item Design of VRF system(AIKTC, 2020-05) Thavai, Rahul; Ansari, Mohd Uzer (17DME102); Ansari, Mohd Danish (17DME101); Niwshekar, Ayman (16ME51); Pagarkar, Junaid (16ME52)Air conditioning demand is rapidly increasing in many parts of the world especially in moderate climate. Air conditioners and refrigerators are the only equipment consumes more electricity say 70 percent house hold articles this result in drastic electricity demands on hot summer days which causes unwanted increase in the use of fossil fuel and nuclear energy which leads to global warming and air pollution. The VRF system uses R410A as refrigerant because it contains only Fluorine hence it has very low global warming potential. VRF systems are enhanced versions of ductless multi-split systems, permitting more indoor units to be connected to each outdoor unit and providing additional features such as simultaneous heating and cooling and heat recovery. VRF technology uses smart integrated controls, variable speed drives, refrigerant piping, and heat recovery to provide products with attributes that include high energy efficiency, flexible operation, ease of installation, low noise, zone control, and comfort using all-electric technology. VRF systems are very popular in Asia. This thesis presents design of Variable Refrigerant Flow (VRF) system for an office building in Vashi, Navi Mumbai. The VRF system was selected as the space saving was priority of the client. The system is designed using ISHRAE hand book and Toshiba manual. The heat load was calculated considering various factors such as outdoor condition, heat gain through glass, transmission gain through wall etc. As per the heat load calculated proper selection of outdoor unit and indoor unit was done using Toshiba manual. The schematic of pipe and indoor is displayed considering cost effectiveness. The obtained results were validated by the industry. Keywords: R410A, ISHRAE, outdoor unit, indoor unit, cassette, British Thermal Unit, compressorItem Design, analysis and fabrication of a Go-Kart Chassis(AIKTC, 2015-05) Thavai, Rahul; Kazi, Shahezad Faisal (11ME28); Mirza, Shahrukh Ajaz(11ME37); Mukri, Hassien Arman(11ME39); Khan, Imran Jamil (11ME53)This report aims to model, simulate, perform the static and dynamic analysis and fabrication of a go kart chassis consisting of Circular beams. Modeling , simulations are performed using modeling software i.e. SOLIDWORKS and analysis on ANSYS. The maximum deflection is determined by performing static analysis. Computed results will be then compared to analytical calculation, to check whether the location of maximum deflection agrees well with theoretical approximation. The chassis is designed such that it requires less material and as well as it is strong enough to withstand the various impacts on it. Strength and light weight were our basic consideration throughout the design of the chassis of the kart. Hence, AISI1018 was selected as an appropriate material for design which is a medium carbon steel with properties such as light weight, high tensile strength, high machinability, better weldability, etc. All the impacts and stresses were calculated manually by considering the severe working conditions and then the design was analysed in the analysis software. Step by step modifications in design were made as found necessary and as analysed on the software. After the complete analysis and the approval of design by inspecting it in all the modes of failure the design was finalized and was selected to fabricate which will not fail in any extreme criteria of stresses or load induced.Item Dynamic Modelling of Biped Robot(P and R Engineering Consultancy Publication, 2016-03) Thavai, RahulGoal of dynamics is to obtain equations of motion of biped. Dynamic model of 11 Degree of freedom biped is formulated. Euler - Lagrange formulation combined with homogeneous transformation matrices are used to derive Equations of motion. Jacobian matrixes are the basic elements in building dynamic model. Jacobian matrixes and Euler- Lagrange equations used to determines its dynamic characteristics such as velocity, acceleration and torque. This is necessary for design as well as for estimation of energy consumption of biped. This paper illustrates the mathematical model of the dynamics equations for the legs into the Sagittal and Frontal planes by applying the principle of Lagrangian dynamics.Item Fabrication and control of semi-autonomous amphibious rover(AIKTC, 2017-05) Thavai, Rahul; Ansari, Mohd. Umar (14DME144); Shaikh, Farhan (13ME106); Pawaskar, Mazhar (13ME101); Khan, Abdul (13ME78)This section is intended for readers who want to gain an understanding of the controlling system, fabrication and basics of amphibious rover and its application in modern field of technology. Amphibious rover is derived from an amphibious cycle is a human-powered vehicle capable of operation on both land and water. The study include fabrication and control system of amphibious rover.Based on the design calculation shown in “Design of Semi-Autonomous Amphibious” aforementioned book, fabrication of important peripherals are done. In further chapters reader can gain knowledge of steps involved in fabrication of different peripherals of rover and control system.Item Inverse Kinematics Solution for Biped Robot(International Organization of Scientific Research (IOSR), 2015-01) Thavai, RahulA biped is a multi-jointed mechanism that performs a human's motions. It seems more difficult to analyze the behavioral character of walking robot due to the complexity of mathematical description. This paper focuses on developing a methodology for deriving an inverse kinematic joint solution of a biped robot. This work aimed to build the lower side, the locomotion part of a biped robot. It couples a design considerations and simplicity of design to provide inverse kinematics analysis of 11 degree-of-freedom (DOF) biped robot. The model used consists of 5-links which are connected through revolute joints. The identical legs have hip joint, knee joints and ankle joint. This paper addresses symbolic formulation for reducing problem in solving univariate polynomial. An effective approach is developed for the solution of inverse kinematics task in analytical form for given end-effector position. This method presents a simple and efficient procedure for finding the joint solution of bipeds.Item Kinematic and Dynamic Modeling of a Quad copter following a trajectory using MATLAB(International Journal on Recent and Innovation Trends in Computing and Communication, 2016-04) Thavai, Rahul; Shaikh, Altamash(12ME48); Syed, Adnan (12ME62); Padwekar, Aamir(13ME133)Our task comprises of plotting different yields of kinematic and element movement concerning time. This yield is acquired by making a quad copter to follow an endorsed direction in the MATLAB ra13 reenactment stage. The focal point of the mass of the quad copter is kept up at the focal point of the quad copter and the accompanying administering kinematic and element mathematical statements are readied. These comparisons inferred are utilized for the beginning of the kinematic and element displaying of the quad copter made to follow the direction. The yields of the kinematic and element demonstrating are made the data for the amendment of blunder info and tuning of the PID control framework. This shut capacity PID control framework is utilized for the adjustment of the quad copter while taking after a given direction and advance the yield of the kinematic and element demonstrating process for tuning reason for the control.Item Kinematic and Dynamic Modeling of a Quadcopter following a trajectory using MATLAB(Vishwatmak Om Gurudev College of Engineering, 2016-04-09) Thavai, Rahul; Shaikh, Altamash(12ME48); Syed, Adnan (12ME62); Padwekar, Aamir(13ME133)Our project consists of plotting various outputs of kinematic and dynamic motion with respect to time . This output is obtained by making a quadcopter to trace a pescribed trajectory in the MATLAB ra13 simulation platform.the centre of the mass of the quadcopter is maintained at the centre of the quadcopter and the following governing kinematic and dynamic equations are pepared. These equations derived are used for the inception of the kinematic and dynamic modelling of the quadcopter made to trace the trajectory. The outputs of the kinematic and dynamic modelling are made the input for the correction of error input and tuning of the PID control system. This closed function PID control system is used for the stabalization of the quadcopter while following a given trajectory and optimize the output of the kinematic and dynamic modelling process for tuning purpose of the control. Index Terms - List key index terms here. No mare than 5.Item Kinematic Modeling of Biped Robot(Pillai HOC College of Engineering and Technology, 2014-02-21) Thavai, RahulIn the last decades we have seen a rapid growth in use of Humanoid Robotics, which leads to an autonomous research field. Humanoid robots are used in all situations of human’s everyday life, cooperating with us. They will work in services, in homes and hospitals, and they are even expected to get involved in sports. Hence, they will have to be capable of doing a diversity of tasks [1]. Another important fact about today's and especially tomorrow’s humanoid robots resembles human-like in their shape and behavior. A number of applications in diverse fields are continuously increasing: replacement of humans in hazardous works such as rescue operations, military operations, disaster scenarios, or restoration movement in people with disabilities. By taking advantages of the strategic footholds in the terrain, legs increase traction and decrease energy consumption.Item Kinematic, Dynamic Modeling and Simulation of Biped Robot(International Journal of Science, Engineering and Technology Research (IJSETR), 2015-04) Thavai, RahulThe idea of having a biped robot walking like a human is found to interesting in many aspects. Biped is a multi-jointed mechanism that performs a human’s motions. It seems more difficult to analyze the behavioral character of walking robot due to the complexity of mathematical description involved. This work is focused on developing a methodology for deriving mathematical modeling of a biped robot. The work is aimed to build the lower side, the locomotion part of a biped robot. The model used consists of 5-links which are connected through revolute joints. The identical legs have hip joint, knee joints and ankle joint. The Kinematical model is obtained using D - H Technique. It couples a design considerations and simplicity of design to provide inverse kinematics analysis of 11 degree-of-freedom (DOF) biped robot. Lagrangian formulation is applied to obtain dynamic model of robot. MAPLE software is used for mathematical modeling. The trajectory planning is done in Matlab for kinematic analysis and robot’s motions. By applying it, the user specific walking parameters, joint trajectories of the robot are computed. The parameters for these motions are found in simulation, under a criterion of stability of walking. Simulations are done in Matlab software to test the behavior of the humanoid. The results show that the proposed motions give an efficient and stable walking of the robot. This method presents a simple and efficient procedure for finding the joint solution of bipeds.Item Kinematic, dynamic modeling and simulation of quadcopter(AIKTC, 2016-05) Thavai, Rahul; Shaikh, Altamash(12ME48); Syed, Adnan (12ME62); Padwekar, Aamir(13ME133)Project consists of plotting various outputs of kinematic and dynamic motion with respect to time. This output is obtained by making a quad copter to trace a prescribed trajectory in the MATLAB simulation platform the centre of the mass of the quad copter is maintained at the centre of the quadcopter and the following governing kinematic and dynamic equations are prepared. These equations derived are used for the inception of the kinematic and dynamic modeling of the quad copter made to trace the trajectory. The outputs of the kinematic and dynamic modeling are made the input for the correction of error input and tuning of the PID control system. This closed function PID control system is used for the stabilization of the quad copter while following a given trajectory and optimize the output of the kinematic and dynamic modeling process for tuning purpose of the control.Item Optimization of plant layout & implementation of 5S(AIKTC, 2018-05) Thavai, Rahul; Purkar, Talha(15DME135); Memon, Saddam(15DME134); Mirza, Abdul Rahim(15DME150); Ziyaur, Raheman(15DME136)The objective of this thesis is to improve the production floor layout of a manufacturing firm using systematic layout planning (SLP) and implement 5s. This project is conducted at NEXA PVT. LTD. MUMBAI various Aviation and Marine equipment’s parts manufacturing company located in at New panvel. The major problem faced by the company is inventory control, store management, poor utilization of space, poor material handling and safety hazards. There is high flow intensity between departments which have high interrelationship. This leads to high travelling time and high travelling cost which in turns decreases overall productivity of the company. An alternative layout is proposed using the 11 steps in Systematic Layout Planning, which is a systematic way of generating layout alternatives. The proposed layout involves transferring the departments which have high interrelationship close to each other. The proposed alternative layout is evaluated later. The layout is chosen based on the performance measures which have the most significant improvement, which are total travel distance, total travel time, output, average resource utilization, total average WIP level, total average waiting time and total time spent in manufacturing certain product either job order or in batches.Item Optimization of plant layout & implementation of 5S(AIKTC, 2018-05) Thavai, Rahul; Purkar, Talha [15DME135]; Memon, Saddam [15DME134]; Mirza, Abdul Rahim [15DME150]; Ziyaur Raheman, [15DME136]The objective of this thesis is to improve the production floor layout of a manufacturing firm using systematic layout planning (SLP) and implement 5s. This project is conducted at NEXA PVT. LTD. MUMBAI various Aviation and Marine equipment’s parts manufacturing company located in at New panvel. The major problem faced by the company is inventory control, store management, poor utilization of space, poor material handling and safety hazards. There is high flow intensity between departments which have high interrelationship. This leads to high travelling time and high travelling cost which in turns decreases overall productivity of the company. An alternative layout is proposed using the 11 steps in Systematic Layout Planning, which is a systematic way of generating layout alternatives. The proposed layout involves transferring the departments which have high interrelationship close to each other. The proposed alternative layout is evaluated later. The layout is chosen based on the performance measures which have the most significant improvement, which are total travel distance, total travel time, output, average resource utilization, total average WIP level, total average waiting time and total time spent in manufacturing certain product either job order or in batches.Item Overview of an engineering drawing(AIKTC, 2019) Thavai, RahulItem Question Bank - Basic Concepts, definitions & First Law of Thermodynamics(AIKTC - SOET, 2018-08-01) Thavai, Rahul