i-manager's Journal on Future Engineering and Technology (JFET)


Volume 12 Issue 1 August - October 2016

Article

Risk Analysis of Instrument Tubing Failures along with its Mitigation Path

Anand Srivastava* , Sheikh Rafik Manihar Ahmed**
* Project Management, Fluor Daniel India Pvt. Ltd., Gurgaon, India.
** Control Systems Engineer, Fluor Daniel India Pvt. Ltd., Gurgaon, India.
Srivastava, A., and Sheikh Ahmed, R. M. (2016). Risk Analysis of Instrument Tubing Failures along with its Mitigation Path. i-manager’s Journal on Future Engineering and Technology, 12(1), 1-8. https://doi.org/10.26634/jfet.12.1.8207

Abstract

This paper explains the various causes of an instrument tubing failure, risk involved and the mitigation path to avoid such incidents in plants. These impulse tubings are employed/installed to measure pressure, flow and levels in a system and/or equipment. Corrosion on tubing fittings, incorrect installation (either due to poor workmanship or non compliance of installation/process hookup), use of incorrect tools, faulty or ignored nuts & ferrule compression fittings, inadequate design tubing support systems, mishandling & improper storage of tube and its fitting are some of the root causes. These lead to a number of problems, including safety issues, plant breakdown, costly regulatory agency fines, higher maintenance cost, energy loss and environmental hazards. The risk involved in an instrument tubing failure relates to process safety hazards, such as loss of containment due to crack in the affected tubing that leads to fugitive emissions, fires, explosions and other employee safety issues. The most serious problems occur when instrument tubing and its fitting component fails causing leakage of process fluid such as gasoline, oil, gas or other volatile, corrosive fluid (sulphur compounds) or toxic gases (such as H S). These can cause fires, explosions or other serious safety hazards such as toxic 2 chemical, gas leakage or acid spraying onto field craft. Generally, tubing failure cases are noticeable in areas such as booster stations, turbine driven pumps, compressors systems, tubing connection for pressure, flow transmitters & pressure gauge, areas where vibrations are present such as pipe racks (with air coolers), and platforms of vibration sources (turbine or diesel generator). The paper details out the possible reasons, hazards and suggested mitigation path to achieve improved availability.

Research Paper

Computer Aided Design and Analysis of Robotics for the NASA Deep Space Habitat

Edward Li* , Tony Tong**, Ravi Dahiwala***
* Senior Student, Fairfield Warde High School, Connecticut, USA.
**-*** Master Degree Student, University of Bridgeport, Connecticut, USA.
Li, E., Tong, T., and Dahiwala, R. (2016). Computer Aided Design and Analysis of Robotics for the NASA Deep Space Habitat. i-manager’s Journal on Future Engineering and Technology, 12(1), 9-16. https://doi.org/10.26634/jfet.12.1.8208

Abstract

Recently, there has been a tremendous growth of NASA robotic missions in planetary science. These missions have provided vital discoveries, including the determination of water-ice deposits at the moon's surface, as well as potential environments on Mars where human and plant life could flourish. The development and improvement of robotic systems integrate the scientific technology of robotic system design and engineering analysis. One robotics that will be applied to NASA deep space habitat has been studied via computer-aided design and numerical simulation in this research. The aim of this research is to study a simple and flexible robotic system for NASA lunar research. The purpose of the computational simulation and analysis is to optimize the robotic system for a better function. The methodologies of computer-aided 3D modeling, finite element method, and structural analysis are applied to study and identify the system's function including structural deformation and equivalent stress of designed robotics. The analytical results can be used to validate the functional reliability and to support future research of robotic systems.

Research Paper

Performance Analysis of an IC Engine with Bio-Blended-Diesel Using Mustard Oil and Calophyllum Inophyllum Oil

Venkatesh B* , Prasanthi**
* Ph.D Scholar, Jawaharlal Nehru Technological University, Andhra Pradesh, India..
** Professor, Department of Mechanical Engineering, Jawaharlal Nehru Technological University, Ananthapuramu, Andhra Pradesh, India.
Venkatesh, B., and Prasanthi, G.(2016). Performance Analysis of an IC Engine with Bio-Blended-Diesel Using Mustard Oil and Calophyllum Inophyllum Oil. i-manager’s Journal on Future Engineering and Technology, 12(1), 17-27. https://doi.org/10.26634/jfet.12.1.8210

Abstract

The increasing energy demand, surging oil prices, depleting oil reserves and environmental pollution problems associated with the use of fossil fuels have sparked renewed interest to find out clean alternative fuels. Biodiesel is an alternative fuel for internal combustion engines. It can reduce Carbon Monoxide (CO), Hydrocarbon (HC) and Particulate Matter (PM) Emissions, compared with diesel fuel, but there is also an increase in Nitrogen Oxides (NO ) x emission. Perversely, so many experiments are conducted on single blended bio-diesel. This paper concentrated on two different bio-diesels blend with diesel. The two bio-fuels are Calophyllum oil and Mustarded oil used for controlling emissions and at the same time improving the performance of an engine. For a last two decades, alternative fuel work has been done for improving the engine performance with single blend. This paper aims to examine the efficiency of diesel by blending two bio-diesels, namely Mustard oil and Calophyllum oil with methyl esters. The different blended oils are tested and its performance was compared, among them B20 (10% M+10% C+ 80% D) is the best blend.

Research Paper

A Novel Method to Detect Isomorphism in Epicyclic Gear Trains

V.V. Kamesh* , K. Mallikarjuna Rao**, A.B. Srinivasa Rao***
* Ph.D Scholar, Jawaharlal Nehru Technological University, Andhra Pradesh, India.
** Professor, Department of Mechanical Engineering, College of Engineering, JNTUK, Kakinada, Andhra Pradesh, India..
*** Principal, Sri Vasavi Institute of Engineering & Technology, Nandamuru, Andhra Pradesh, India
Kamesh, V.V., Rao, K..M., and Rao, A. B S. (2016). A Novel Method to Detect Isomorphism in Epicyclic Gear Trains. i-manager’s Journal on Future Engineering and Technology, 12(1), 28-35. https://doi.org/10.26634/jfet.12.1.8211

Abstract

Graph theory is an effective tool in the Structural synthesis of Epicyclic Gear Trains (EGTs) widely used in Automatic transmission system, Overdrives, Gas turbine engines, Machine tool gearboxes, etc. Enumeration of EGTs with different links with varying degrees of freedom were studied by many researchers earlier. In recursive method of enumeration, starting with 3-link EGT having one gear pair and two transfer pairs, higher link EGTs are generated by adding one transfer pair and one gear pair to the base level gear train. As large numbers of topological structures are generated, many of them are identical in structure and behaviour, i.e., isomorphous. In this paper, a simple method is proposed to detect isomorphism in epicyclic gear trains by estimating influence of every link over the other links and vice versa. A new parameter 'Functional Value of Gear Train' defined in the method assess the overall influence of all links on a single link and vice versa. All the 4-link, 5-link and 6-link 1-dof epicyclic gear trains are studied by the proposed method. Structural Isomorphism in EGTs explained by calculating 'Functional Value of Gear Train' are proposed in the method taking two 5- link 1-DOF graphs and two 6-link 1-DOF graphs. The distinct structural non-isomorphic graphs of 4-link 1-DOF are checked for Rotational Isomorphism. The number of computations is less in the proposed method. The proposed method can be extended to check isomorphism in EGTs with higher linkage and DOF.

Research Paper

A Novel Index for the Rating of Kinematic Chains Using Residual Chain Index Value

Sreenivasa Reddy M.* , K. Mallikarjuna Rao**, A.B. Srinivasa Rao***
* Ph.D Scholar, College of Engineering, JNTUK, Kakinada, Andhra Pradesh, India.
** Professor, Department of Mechanical Engineering, College of Engineering, JNTUK, Kakinada, Andhra Pradesh, India.
*** Principal, Sri Vasavi Institute of Engineering and Technology, Nandamuru, Andhra Pradesh, India.
Reddy, M. S., Rao, K. M., and Rao , A. B. S. (2016). A Novel Index for the Rating of Kinematic Chains Using Residual Chain Index Value. i-manager’s Journal on Future Engineering and Technology, 12(1), 36-45. https://doi.org/10.26634/jfet.12.1.8212

Abstract

In the analysis of kinematic chains for various industrial applications, especially Robotics and Automation, it is necessary to rank the various kinematic chains based on its capability in transmitting the input energy towards optimizing the energy resources. In this paper a new parameter, 'Residual Chain Index' (RCI) is proposed to compare the chains, which have same energy transfer capacity with respect to link, joint and loop assortment. The Residual Chain index is easy to calculate and based on the effect of each link over the entire chain. Ranking for a chain is based on the value of energy transfer with respect to link, joint, loop assortments and residual chain index. Analysis has been carried out on all possible distinct kinematic chains with 10 links and 3-degree of freedom. Out of 98 distinct chains formed in this case, fifteen (15) different groups have been identified such that, chains belonging to each group have same value of link, joint and loop assortment energy transfer capacities. There are 43 chains belonging to these 15 groups. RCI obtained for 43 chains and results are presented in this paper.