JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY
This journal is a publication media of research results in the field of machinery that has been carried out by academics or practitioners by following predetermined rules. The research areas include: manufacturing, engineering materials, energy conversion and renewable energy, as well as other machinery fields, such as: mechatronics, hydraulics, plantation tools, and engine maintenance management systems. Each paper that has been sent will be reviewed by a team of experts in their field, and published online through the http://ojs.uma.ac.id/index.php/jmemme url address. This journal was founded in 2017 and has been registered with a print version of ISSN 2549-6220 and the online version of ISSN 2549-6239.
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<![CDATA[Analysis of Fouling Factors on Heat Transfer in Shell and Tube Heat Exchangers Type 1-2 Pass ]]>
<![CDATA[Aditya, Yudi]]>;
<![CDATA[Irwansyah]]>;
<![CDATA[Weriono]]>;
<![CDATA[Indra Hermawan]]>;
<![CDATA[Idris, Muhammad]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.6237
<![CDATA[A heat exchanger is a device that is used to change the temperature or fluid phase by absorbing or releasing heat between the hot fluid and the cold fluid. One type of heat exchanger that is most widely used in industry is shell and tube. Optimal heat exchanger performance has an important role to support production stability in various industries. The performance of shell and tube heat exchangers is affected by fouling factors which are the formation of deposits on the surface of the heat exchanger which can inhibit heat transfer and increase the resistance to fluid flow in the heat exchanger. After analysis, it is known that the mass flow rate of the flue gas is 0.06523 kg/s, the effectiveness of the heat exchanger is 66.837%, the overall gross area is 3.317350717 m2, and the effective heat transfer area is 2.211567145 m2.]]>
<![CDATA[Analysis of Heat Transfer in Shell and Tube Type Condensers ]]>
<![CDATA[Rifaldo, Zulpikar]]>;
<![CDATA[Burhan Hafid]]>;
<![CDATA[Zakir Husin]]>;
<![CDATA[Etanto Heiliano Wijayanto]]>;
<![CDATA[Idris, Muhammad]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.6238
<![CDATA[A heat exchanger is a device used to exchange or change the temperature of a fluid by exchanging heat with another fluid. One of the heat exchangers is a surface type condenser where the steam is separated from the cooling water, the steam is outside the pipes while the cooling water is in the pipes at PT. SOCIMAS. At PT. SOCIMAS, the condenser is part of the main cooling system which functions to condense steam into water and maintain the efficiency and work cycle of the turbine high. For this reason, this final project report focuses on condenser analysis. The results obtained from this final project are the value of the inner convection coefficient of 4056.6827 W/(m2.K) and the outer convection coefficient of 97414.18W/(m2.K) . value of heat transfer rate and effectiveness (ε) on the condenser PT. SOCIMAS obtained a heat transfer rate of 153.6001264 MW. While the effectiveness (ε), obtained 0.99571 % This shows that the condition of the condenser is quite good, because the steam can go to the condenser, so that the rate of heat transfer and the effectiveness of the condenser are able to condense the steam into liquid.]]>
<![CDATA[Analysis of the Effectiveness of Condenser Heat Transfer in the Distillation Process of Serai Wangi Leaves ]]>
<![CDATA[Karo Karo, Septa Fernando]]>;
<![CDATA[Weriono]]>;
<![CDATA[Din Aswan Ritonga]]>;
<![CDATA[Darianto, Darianto]]>;
<![CDATA[Muhammad Idris]]>;
<![CDATA[Indra Hermawan]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.6401
<![CDATA[The condenser is a critical component in systems designed to condense steam into liquid. The performance of a condenser can be influenced by the rate of heat transfer, vacuum pressure, and effectiveness. The aim of this research is to ascertain the effectiveness value and the variables affecting the performance of the condenser in the distillation process of citronella leaves, as well as to understand the impact of the heat transfer rate on film condensation (condensate steam mass). The methodology for assessing effectiveness values utilized the Log Mean Temperature Difference (LMTD) and Effectiveness – Number of Transfer Unit (NTU) approaches, alongside comparing the condensate steam mass with the steam mass flow rate to achieve film condensation. The research findings revealed an effectiveness value of 89% for the condenser, with 36% of the condensate steam mass converting into bio-oil. Influential variables include a capacity ratio of 0.0182840 and a heat transfer rate of 186,544.68 W. The LMTD was calculated to be 29.74°C. Thus, it can be concluded that the condenser used in the distillation process of citronella leaves still maintains good performance.]]>
<![CDATA[Design an Eddy Current Dynamometer with 0.85 mm Copper Wire and 560 Core Coil Windings ]]>
<![CDATA[Prasetyo, Rio Dwi]]>;
<![CDATA[Adhes Gamayel]]>;
<![CDATA[Mohamad Zaenudin]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.8081
<![CDATA[The eddy current dynamometer is a torque test measuring instrument calculated from the loading of an engine that rotates on its shaft to stop a rate from engine rotation and produce the engine loading power. The eddy current dynamometer is a torque test measuring instrument calculated from the loading of an engine that rotates on its shaft to stop a rate from engine rotation and produce the engine loading power. The braking system is one of the most important things in an engine, to stop the engine from moving braking is needed. This study aims to calculate the torque of the eddy current dynamometer. With a copper wire diameter of 0.85 mm and 560 windings of the core coil. Torque results show an increase in each variation in current and rotation. The torque power reaches its maximum point at 3000 RPM revolutions at 15V voltage at 25.4A amperes, namely 2.15 Nm. The number of windings on the wire coil is proportional to the magnitude of the solenoid value. The calculation of the maximum value induction at the center of the magnetic force pole core is obtained from the wire diameter of 0.85mm and 560 windings of the core coil at a voltage of 15V in amperes of 25.4A at a roller rotation of 3000 RPM of 254-4 Tesla or Wb/m2. And from both ends of the polar core solenoids, the result of magnetic strength is smaller than the magnetic induction center of the polar core, which is 127-4 Tesla or Wb/m2.]]>
<![CDATA[Analysis of the Effect of Additional Number of 24, 26 And 28 Blade of Pelton Turbine from PLA to Turbine Performance ]]>
<![CDATA[Mahardika, Shultoni]]>;
<![CDATA[Sugiono, Didik]]>;
<![CDATA[Irwansyah, Rizal]]>;
<![CDATA[Supardi]]>;
<![CDATA[Novianto, Hernawan]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.9469
<![CDATA[Indonesia is currently unable to provide 100% electricity supply for its people due to uneven access to infrastructure development. This causes the need to build alternative energy to meet these needs. Water flow has potential energy that has been widely used in various countries to be converted into electrical energy. One way of converting is with a Pelton turbine. A Pelton turbine can work well, influenced by several parameters, namely the height of the waterfall, the angle of the blades, the flow rate, the number of nozzles, the number of blades, the weight of the turbine, etc. In this study the parameters set were the flow rate according to the pump flow rate, namely 18 liters/minute, the number of turbine blades used were 24, 26 and 28 pieces. The diameter of the turbine runner is 300 mm, and the load used in measuring the current is 50 watts. The results showed that the higher the rotational speed, the higher the turbine power, along with the increasing number of blades tested. The highest turbine power is at 28 blades and the turbine rotation is 385.42 Rpm which is 5.69 watts. While the lowest is at 24 blades and turbine rotation of 367.95 Rpm which is equal to 4.83 watts. The power difference between blades 24 and 28 is 15%. The PLA material used as the turbine blade material and acrylic as the runner material results in the moment of inertia of the turbine when rotating at blade 24 which is 0.023 kg.m² and blade 28 which is 0.025 kg.m². The mass of the turbine becomes lighter resulting in the power difference between blades 24 and 28 not being too far.]]>
<![CDATA[Effect Analysis of Boiler Feed Water and Exhaust Gas Turbine Generator against Steam Products ]]>
<![CDATA[M Ihsan Riady]]>;
<![CDATA[Bazlina Dawami Afrah]]>;
<![CDATA[Nabilla Tania Rahma]]>;
<![CDATA[Edda Anastasia Oktawina]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.9766
<![CDATA[The boiler is a tool that functions to produce steam, consisting of two important parts, namely the heating kitchen to produce heat obtained from burning fuel and the proper boiler to convert water into steam. The petrochemical industry, in terms of meeting steam needs, uses supply from the 4003-U waste heat boiler (WHB), namely a boiler that utilizes exhaust gas from a gas turbine generator (GTG). WHB operation uses two sources of heat and fuel, namely exhaust gas from GTG and natural gas. The calculation method used to determine the results of steam products from WHB is the calculation of heat value and efficiency. Based on calculation data for the period 03 October-09 October 2022, efficiency values range from 67-74%. The size of the WHB efficiency is greatly influenced by several factors, namely the quality of the boiler feed water (BFW), the quality of the fuel and heat source, the quality and amount of combustion air and how much heat is lost through the boiler tubes.]]>
<![CDATA[Core Mold Machinery Optimization Process CNC Milling Machine ]]>
<![CDATA[Fayi Rahmat Prayogi]]>;
<![CDATA[Sesmaro Max Yuda]]>;
<![CDATA[Bantu Hotsan Manullang]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.10044
<![CDATA[Global competition for the same product segmentation, companies need to innovate and optimize the products they produce. One of the optimizations carried out is by improving the machining process in the manufacture of mold components. The program creation process is carried out using Computer Aided Manufacturing (CAM) software from Delcam (PowerMill 2020) which is then used on CNC Milling machines. An improvement process is needed for making a CAM program so that production quality continues to meet standards and the production process time becomes more effective. To optimize the mold production process, reduce mold production costs, maintain the quality of the resulting production. By collecting data obtained by interacting directly with irrational parties, conducting experiments and directly observing the operational processes carried out in research, so as to understand the problems, critical points in the field. There are several factors that have an impact on research, namely on the quality that the quality of the product when viewed from the stock model is smooth and according to standards. Then delivery (Delivery) reduced machining time or cycle time on Core parts will provide reciprocal delivery to the next process at a more appropriate time. For the safety of the Computer Aided Manufacturing (CAM) program and the use of overhangs, if verified using PowerMill Software, no collisions or program crashes were found. It can be ascertained that the manufacturing program in this study is safe to use and the productivity obtained is more optimal.]]>
<![CDATA[Numerical Modification of Piping Systems to Increase Flow Velocity in Receiving Facilities ]]>
<![CDATA[Rinaldi]]>;
<![CDATA[weriono, weriono]]>;
<![CDATA[Adi Isra]]>;
<![CDATA[Ajar Darmawan]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.10254
<![CDATA[The process of unloading avtur via bridger capacity of 24 KL through the piping system at the DPPU SSK II receiving facility takes 55-60 minutes with an average unloading flow rate is 27 m3/hour while the pump flow rate specification used is 60 m3/hour. In the process of unloading avtur through a piping system, there are various kinds of fitting. Where in the operation of the piping system can result losses caused by pipe roughness, pipe length, flow capacity, and components installed in the system. This study aims to determine the total head, minor and major losses of the piping system using the Darcy-Weisbach equation in mathematical calculation methods and simulations in the pipe flow expert software, the result of simulations will be compared with mathematical calculations to modify the piping system so can be obtained for increasing the flow rate of fluid flow to speed up the unloading process of avtur via bridger. The results of this study are: 1.) The total head value of the receiving piping system using the calculation method is 16.51 m while using a flow expert simulation is 12.9 m. 2.) The results of mathematical calculations of the energy equation for the piping system at the receiving facility obtained a flow rate of 55.2 m3/hour. 3.) From the results of system modifications by increasing the flow rate capacity to 80 m3 / hour and the pump head achieved 16.05 m, According to the simulation results of the software flow expert, pumping flow rate increase of 72 m3/ hour.]]>
<![CDATA[Wear Analysis of Gear Pump Supply Fat Coating Liquid Cat Food ]]>
<![CDATA[Wilarso]]>;
<![CDATA[Mupah Rizal]]>;
<![CDATA[Asep Saepudin]]>;
<![CDATA[Asep Dharmanto]]>;
<![CDATA[Mohd. Yuhazri Yaakob]]>;
<![CDATA[C.W. Mohd Noor]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.11093
<![CDATA[Trochoid Top 208 HBM Nippon Oil Pump (NOP) is an important unit in the cat food manufacturing process. The pump system acts as a fluid transfer agent by directing fluid from the tank to the nozzle channel. Based on Pareto and Fishbone diagram data, it was found that the main causes of problems that often occur with the Nippon Oil Pump (NOP) Type Trochoid Top 208 HBM are filter blockage (5 times) and pump gear wear (3 times). The aim of this analysis is to reduce damage to the Nippon Oil Pump (NOP) Type Slocoid Top 208 HBM and increase the production of higher quality cat food. From the results of the analysis carried out, there were several findings that caused wear on the gear pump, including the viscosity of the material being channeled which was very thick, reaching 1.37 cp. Meanwhile, the pump specifications used are only 2L/minute with a pump motor power of 0.75kw 1.86A 380V. The filter pore particles are too small, reaching 250 microns and the dimensions of the pipe used have a flow pipe diameter of ½”. From the analysis carried out, replace the pump capacity to a minimum of 4L/minute, then replace the filter with pore particles of 600 microns. And the pipe uses a diameter of 1".]]>
<![CDATA[Analysis of the Influence of Changes In Workpiece Rotation and High Speed Steel Lathe Tool Angles on the Surface Roughness of ST37 Workpieces ]]>
<![CDATA[Hilman Sholih]]>;
<![CDATA[Izar Mahmud Syuhada]]>;
<![CDATA[Asep Dharmanto]]>;
<![CDATA[Asep Saepudin]]>;
<![CDATA[Wilarso]]>;
<![CDATA[C.W. Mohd Noor]]>
<![CDATA[ JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jmemme.v8i1.11094
<![CDATA[Turning is a machining process used to shape products by cutting a rotating workpiece with a sharp chisel. One of the problems that occurs in the turning process is the level of surface roughness that does not meet the specified specifications. Even though the dimensions are in, the final product is rejected because the surface is too rough. The level of surface roughness is determined by several factors, including cutting speed, rotation speed and cutting edge geometry. Lathe tool geometry consists of clearance angle, relief angle, rake angle, and back rake angle. This research aims to determine the effect of spindle rotation speed and tool angle on the level of roughness of the workpiece on a lathe. Spindle rotation speed 300 rpm and 600 rpm. The only change in the tool geometry is the clearance angle with angles of 10°, 20° and 30°. The workpiece material used is ST37. The chisel material used is High speed steel (HSS). Testing of the results of the turning process is carried out by comparing the surface roughness with a surface roughness comparator. Cutting speed is not changed. From the research results, the recommended angle is an angle of 10º with the surface roughness results obtained being N5.]]>
