iosr-JMCE   Volume-21 ~ Issue-6 ~ Nov. – Dec. 2024

Abstract: During the commissioning period of nuclear power plants, vibration problems occurred frequently. In this paper, a certain nuclear power plant was taken as the analysis object. It was found that adopting reasonable vibration diagnosis and treatment methods is conducive to accurately locating and solving vibration problems of rotating machinery, such as false feet, insufficient stiffness, resonance, and misalignment, with less economic and time investment, thereby ensuring the safe operation of nuclear power plants....

Keywords: Vibration diagnosis, Nuclear power plant, Rotating machinery

[1] Qiuhua Mao, Qin Ouyang, Zhengping Zhou, Linlin Chen. Vibration Management Of Rotating Equipment At Tianwan Nuclear Power Plant[J]. Energy Technology And Management, 2014, 39(02):122-124.
[2] Zhongxuan Lu. Analysis And Management Of Rotating Equipment Vibration Problems In Nuclear Power Plants[J]. China Nuclear Power, 2023,16(03):461-466.
[3] Donald E.Bently, Charles T.Hatch. Fundamental Of Rotating Machinery Diagnostics[M]. Mechanical Industry Press, 2014.
[4] Wen Zhu, Mulei Lin. Analysis Of Causes And Solutions For Vibration In Vertical Pumps[J]. Plant Maintenance Engineering, 2024(9):82-84.
[5] Zimeng Chen, Wei Liu. Treatment Of Motor Vibration In Long-Shaft Liquid-Submersed Pumps At Nuclear Power Plants[J]. China Nuclear Power,2023,16(6):828-831

Abstract: Robotic arm is a mechanical device which is used to perform tasks with a reduced or no human interaction at all. It can replace the arm of a human being but it is usually more accurate, reliable and can work longer and repeated or risky tasks without getting tired. Industrial robotic arms are common in manufacturing processes especially in assembly lines but their application has spread across other sectors including medical, aerospace and even in prosthetics.

[1] Siciliano, B., Sciavicco, L., Villani, L., & Oriolo, G. (2010). Robotics: Modelling, Planning And Control. Springer Science & Business Media.
[2] Craig, J. J. (2013). Introduction To Robotics: Mechanics And Control. Pearson Education.
[3] Groover, M. P. (2020). Automation, Production Systems, And Computer-Integrated Manufacturing. Pearson Education.
[4] Roco, M. C. (1999). Nanotechnology: Molecular Speculations On Global Abundance. Ai Magazine, 20(2), 65–82.
[5] Kragic, D., & Christensen, H. I. (2002). Survey On Visual Servoing For Manipulation. Computational Vision And Active Perception Laboratory, 21(2), 123–142.

Abstract: As a sub-discipline of industrial engineering, the management of heat transfer is critical for the viability and competitiveness of many processes. Heat exchangers are basic pieces of equipment that enable this heat transfer and are an important part of systems as diverse as power stations, chemical plants or oil refineries, HVAC systems or even food processing plants. Heat exchangers are commonly used across many industries but the task of enhancing their......

[1] Incropera, F. P., & Dewitt, D. P. (2006). Fundamentals Of Heat And Mass Transfer. Wiley.
[2] Shah, R. K., & Sekulic, D. P. (2003). Heat Exchanger Design Handbook. Crc Press.
[3] Patankar, S. V. (1980). Numerical Heat Transfer And Fluid Flow. Hemisphere Publishing.
[4] Kakac, S., & Liu, H. (2002). Heat Exchangers: Selection, Rating, And Thermal Design. Crc Press.
[5] Kandlikar, S. G., & Grande, W. J. (2003). Evolution Of Microchannel Flow Passages—Thermohydraulic Performance And Fabrication Technology. Heat Transfer Engineering, 24(1), 3-17.

Abstract: This research examines the impact of different contact locations (CL) and load orientations on the dynamic behavior of cracked spur gears. The pinion rotation angle was examined using vibration analysis methodologies for three clearance levels (1.5 mm, 2.5 mm, and 3 mm) at various load angles (15°, 30°, and 45°) directed towards the rim and the tooth. Results demonstrate that with reduced CLs, significant fluctuations in pinion rotation angle occur, exhibiting increased.....

Keywords: Spur gear, Crack, Pinion, Gear mesh stiffness

[1] Ma H. And Zeng H., "Review On Dynamics Of Cracked Gear Systems", Engineering Failure Analysis 55, 224 (2015).
[2] Markovic M., "Investigation On In-Process Sensing Of Turning Tool Wear By Acousticemission Measurements", Msc Thesis, School Of Engineering, Cranfield University, Uk, 1978.
[3] Meagher J. And Wux., "A Comparison Of Gear Mesh Stiffness Modelling Strategies",Proceedings Of The Imac-Xxviii, February 1-4, Jacksonville, Florida Usa.
[4] Mindess S., "Acoustic Emission Method", Crc Handbook On Non-Destructive Testing Of Concrete, Crc Press, 317, 1991.
[5] Mohammed O. And Rantalo M., "Improving Mesh Stiffness Calculation Of Cracked Gears For The Purpose Of Vibration Based

Abstract: Background: The escalating global demand for energy is driving a continuous rise in fossil fuel consumption, resulting in its inevitable depletion. The unavailability of fuel leads to an increase in fuel prices. The rise in fuel prices is significantly affecting the economic growth of countries. In this paper a biodiesel from non-edible source candlenut oil is used as substitute to diesel fuel Blend of candlenut oil methyl ester (CME20D80) and diesel, neat diesel is tested in single cylinder four stroke CRDI Diesel engine to check the performance and emission characteristics.......

Keyword: CME, CME20D80, COME20D80MgO50, COME20D80MgO100, BTE,SFC.

[1]. H. K. Imdadul Et Al., "Experimental Assessment Of Non-Edible Candlenut Biodiesel And Its Blend Characteristics As Diesel Engine Fuel," Environ. Sci. Pollut. Res., Vol. 24, No. 3, Pp. 2350–2363, 2017, Doi: 10.1007/S11356-016-7847-Y.
[2]. L. N. Pham Et Al., "Production Of Biodiesel From Candlenut Oil Using A Two-Step Co-Solvent Method And Evaluation Of Its Gaseous Emissions," J. Oleo Sci., Vol. 67, No. 5, Pp. 617–626, 2018, Doi: 10.5650/Jos.Ess17220.
[3]. B. Cahyono, A. Z. Muhammad Fathallah, And V. I. Pujinaufal, "Effect Of Model From Candlenut Seed (Aleurites Moluccana) To Nox Emission And Combustion Process On Single Cylinder Diesel Engine," Int. J. Mar. Eng. Innov. Res., Vol. 3, No. 2, 2018, Doi: 10.12962/J25481479.V2i4.4170.
[4]. G. Antony Casmir Jayaseelan, A. Anderson, L. Prabhu, And V. Srinivasan, "Impact Of Cerium Oxide Nanoadditives On The Performance And Emission Characteristics Of Candlenut Biodiesel," Mater. Today Proc., Vol. 33, No. Xxxx, Pp. 891–894, 2020, Doi: 10.1016/J.Matpr.2020.06.420.
[5]. A. E. Atabani, M. Mekaoussi, G. Uguz, O. Arpa, A. Ayanoglu, And S. Shobana, "Evaluation, Characterization, And Engine Performance Of Complementary Fuel Blends Of Butanol–Biodiesel–Diesel From Aleurites Moluccanus As Potential Alternative Fuels For Ci Engines," Energy Environ., Vol. 31, No. 5, Pp. 755–784, 2020, Doi: 10.1177/0958305x18790953

Abstract: The utilization of electromigration for enhancement of microspheres using sudden change in geometrical shape of sample was investigated. The experimental sample of Al metal line is formed on a TiN layer and covered with a SiO2 passivation layer. The experimental results revealed that sudden change in geometrical shape of specimen significantly affects temperature, current density and current stressing time to enhance atomic accumulation for growing microspheres. The experimental results are explained in the discussion. A finite element analysis was done to investigate the effect of temperature profile due to sudden change in cross-sectional area of a sample structure.

Keyword: Electromigration, Enhancement, Fabrication, Microsphere, Current density.

[1] J. Li, C. Papadopoulos, J. M. Xu And M. Moskovits, "Highly-Ordered Carbon Nanotube Arrays For Electronics Applications," Applied Physics Letters, Vol. 75, No. 3 (1999), Pp. 367-369.
[2] Y. Cui, L. J. Lauhon And M. S. Gudiksen, J. Wang, And C. M. Lieber, "Diameter-Controlled Synthesis Of Single-Crystal Silicon Nanowires," Applied Physics Letters, Vol. 78, No. 15 (2001), Pp. 2214-2216.
[3] Q. Wang, F. Y. Cao, Q. W. Chen And C. L. Chen, "Preparation Of Carbon-Micro Spheres By Hydrothermal Treatment Of Methylcellulose Sol," Materials Letters, Vol. 59, No. 28 (2005), Pp. 3738-3741.
[4] Z. Q. Zhang, C. B. Jiang, S. X. Li And S. X. Mao, "Nucleation And Growth Of Zno Micro- And Nanobelts During Thermal Evaporation," Journal Of Crystal Growth, Vol. 277, No. 1-4 (2005), Pp. 321-329.
[5] J. K. Howard And R. F. Ross, "Electromigration Effects In Aluminum Film On Silicon Substrates," Applied Physics Letters, Vol. 11, Issue 3 (1967), Pp. 85-87.

Abstract: The heavy thunderstorm as equivalent to PMF (Probable Maximum Flood) was occurred in 2012 at 12MW Jhimruk small hydropower project located in Pyuthan District, Lumbini Province no 5 of Nepal. Three radial gates were operated to evacuate the reservoir level in dam. About 10kM far downstream of the existing Jhimruk, the flood level was marked and the peak flow was validated for the flood event. The land and properties of downstream communities were damaged by the flood during operation of the gates. There was no early warning system installed beforehand to protect the life and property of the downstream communities. After this event the early warning system is installed and the mechanism to predict the flood damage during the operation of gates was established......

Keyword: Dam Breaching, Peak Flow, Flood Attenuation, HEC-RAS Unsteady Flow Equation.

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Abstract: The study investigates the utilization of Low-Density Polyethylene (LDPE) plastic waste as a substitute material in the Asphalt Concrete Wearing Course (AC-WC) open-graded mixture with 60/70 penetration bitumen as the binder. This research aims to address two critical issues: reducing unmanaged plastic waste and mitigating water ponding on road surfaces, which can lead to traffic accidents. Laboratory experiments were conducted to evaluate the effects of LDPE substitution at various percentages (5%, 7.5%, and 10%) and sizes (0.25 cm², 2.25 cm², 6.25 cm², 12.25 cm²) on the mechanical and permeability properties of the asphalt mix. Key parameters such.....

Keyword: Low-Density Polyethylene (LDPE), Asphalt Concrete Wearing Course (AC- WC), Open-Graded Asphalt, Plastic Waste Utilization, Marshall Stability, Permeability, Sustainable Road Construction

[1]. ASTM C136:2012: "Test Method For Sieve Analysis Of Fine And Coarse Aggregates (ASTM C136-06, IDT)."
[2]. ASTM D2170-10: "Standard Test Method For Kinematic Viscosity Of Asphalts (Bitumens)."
[3]. ASTM C136:2012: "Test Method For Sieve Analysis Of Fine And Coarse Aggregates (ASTM C136-06, IDT)."
[4]. ASTM D2170-10: "Standard Test Method For Kinematic Viscosity Of Asphalts (Bitumens)."
[5]. SNI 2441:2011: "Test Method For Specific Gravity Of Hard Asphalt." [6]. SNI 2456:2011: "Test Method For Asphalt Penetration.