Jurnal Teknik Mesin Indonesia

Analisis performa mesin oily water separator tipe CYF-1.OY pada pembangunan kapal baru 2000 GT dengan metode eksperimen

Budi Utomo, Sulaiman, Sunarso Sugeng, Mohd Ridwan, Samuel Febriary Khristyson — Tue, 11 Oct 2022 00:00:00 -0700

For the ideal operation of the oily water separator, maintenance and repairs should be carried out regularly so as not to interfere with the operation of the ship. The purpose of this article is to analyze the performance of the Oily Water Separator engine type CYF-1.OY on the 2000 GT ship building project. Experiment method used to determine the performance of the machine and assuming evaluation correction approach. The result of engine performance, time the machine works is directly proportional to the volume of waste capacity so that the more volume, the longer it takes depending. The efficiency is similar, meaning that the results are below 5% and are still in relevance. In operating and adjusting the Oily Water Separator, more observation and attention is needed, especially for the display and capacity of the machine.

Analisis performa bilah taper dengan airfoil GOE 796 pada turbin angin sumbu horizontal TSD-500 di PT Lentera Bumi Nusantara

Raditya Elfa Pratama, Bobie Suhendra — Tue, 11 Oct 2022 00:00:00 -0700

Indonesia's electricity needs are increasing from year to year, but the availability of fossil fuels such as oil and coal is decreasing, so that new and renewable energy sources are needed as a solution to overcome the problem. One of the renewable energy sources that can be utilized and has great potential is wind energy. The purpose of this study was to determine the optimal taper blade with airfoil for a micro-scale horizontal axis wind turbine. In this study, horizontal axis wind turbine blades with GOE 796 airfoil were tested using a cooging-less PMSG generator in order to achieve high efficiency at minimum wind speeds. The design of the GOE 796 Airfoil Taper blade has a radius of 1 m, a chord width of 34-74 mm, with a twist angle of 5.66-11.66°. The results of the analysis of the performance of the Taper GOE 796 Airfoil blade with a maximum wind speed of 10 m/s has optimal performance at TSR 6.5 with a Coefficient Power (C_p) of 35%, producing a maximum power of 670 W at a rotation speed of 620 rpm and a torque of 10.3 Nm.

Analisa numerik pengaruh diameter perforate terhadap perpindahan panas dan penurunan tekanan pada saluran segi empat 4:1 menggunakan perforated groove v- rib

Khairul Umurani, Arya Rudi Nasution — Tue, 11 Oct 2022 00:00:00 -0700

In the internal cooling ducts of the gas turbine blades, the rib structure is widely used to enhance convective heat transfer with the flow of coolant passing through the rib surface. This research concentrates on the perforated V-rib with grooved in the cooling channel with a rectangular cross-section. This research analyzes the heat transfer and pressure drop in the rectangular channel with a perforated groove v-rib to provide the cooling blade gas turbine solution. This research was conducted by numerical analysis. Several models were created and analyzed using Solidworks Flow Simulation, a commercial computational fluid dynamics (CFD) based on the finite volume method. Solidworks Flow Simulation Solver to analyze laminar and turbulent flow using the Reynolds averaged Navier-Stokes equation. Using the same transport equations for laminar and turbulent flows provides flexibility. Turbulence in the flow is treated using turbulent kinetic energy (k) and turbulence dissipation rate (ꞷ) using the standard k-ꞷ turbulence model. The Reynolds numbers 2000, 4000, 6000, 8000, 10000,12000,14000. By giving 1000 Watts of heat at the bottom of the channel, the air condition at the inlet temperature is 30 oC and a pressure of 1 atm. In the flow regime of 2000 < Re < 20,000, perforated rib construction significantly increases the Nusselt number compared to no rib. The coefficient of friction for the solid rib configuration is higher than for the rib with holes.

Desain komponen alat pengupas dan pengiris bawang putih

I Ketut Adhiarta Laksemana, Sri Nararia Anggita Damayanti, Farid Triawan — Tue, 11 Oct 2022 00:00:00 -0700

Garlic as a basic spice has never been separated from the processing food industry. The garlic processing process which includes stripping and slicing will take a lot of time if the processes are done manually on each clove of garlic. The study tried to help by designing and analyzing devices that could help users peel and slice garlic using a rotation mechanism. The design of this device is designed to peel 4 kg of garlic within 30 minutes by applying a force of 25 N. The device has a uniqueness, it can be disassembled and accompanied by additional features in the form of a slicer knife to make it easier to install and use the device. Based on the results of the analysis, the safety factor values at static and dynamic loads were obtained at 1.44 and 1.73 in the most critical parts. Therefore, it can be concluded that this product is safe and has an infinite age prediction. This study is expected to be a reference for the creation of better garlic peeling and slicer products.

Studi pengaruh pengoperasian soot blower terhadap energi panas yang diserap superheater pada unit 2 PLTU tenayan

Fadhlul Fajri, Rafil Arizona — Tue, 11 Oct 2022 00:00:00 -0700

This study aims to determine the of heat transfer absorbed by the high temperature superheater (HTS) and low temperature superheater (LTS) in boiler unit before and after the soot blower. This research uses 3 methods, namely, literature study, field observation, and interviews. The results of analysis show the heat transfer rate absorbed by the high temperature superheater (Q_HTS) increases after 1 hour soot blower, which is 72240 MJ/hour from (Q_HTS) 1 hour before soot blower, which is only 65434 MJ/hour, (Q_HTS) increases after 2 hours soot blower, namely 72575 MJ/hour from (Q_HTS) 2 hours before soot blower only 66886 MJ/hour and (Q_HTS) increased after 3 hours soot blower which is 73903 MJ/hour from (Q_HTS) 3 hours before soot blower only 69545 MJ/hour, then rate heat transfer absorbed by the low temperature superheater (Q_LTS) increased after 1 hour soot blower, which was 91797 MJ/hour from (Q_LTS) 1 hour before soot blower was only 89625 MJ/hour, (Q_LTS) increased after 2 hours soot blower being 92208 MJ/ hours from (Q_LTS) 2 hours before soot blower which was only 90267 MJ/hour and (Q_LTS) increased after 3 hours soot blower which was 92582 MJ/hour from (Q_LTS) 3 hours before soot blower only 90536 MJ/hour.

Dampak penambahan limbah biomassa cangkang kelapa sawit sebagai bahan bakar boiler terhadap heat rate dengan metode co-firing

Nefri Yurisman, Rafil Arizona — Tue, 11 Oct 2022 00:00:00 -0700

Indonesia's electricity plants mostly use off-renewable resources to meet the electricity needs of people or industries such as coal. This crisis problem requires that we seek a fuel alternative to replace coal or at least reduce coal consumption. One of them biomass fuel by applying co-firing methods. The co-firing process aims to raise thermal energy in the boilers, and therefore it is expected to raise the heat rate of the boiler fuel. The application of research uses a comparative analysis method that will compare heat rate using co-firing method with heat rate without the co-firing method. Analysis shows the impact of adding biomass waste as a boiler fuel to create a heat rate with co-firing increased by 19810.41 kkal/kWh compared to the time without co-firing 19207.08 kkal/kWh. The test also affected its carbon content of 57.62% increased 57.88%, while in total sulfur from 0.20% to lower by 0.19%.

Variabel – variabel dan efeknya dalam kalkulasi tingkat keausan ban yang didasarkan atas model matematis

Eduardo Wangsa Saputra, Henky Suskito Nugroho — Tue, 11 Oct 2022 00:00:00 -0700

Even though tires are the only contact points of a vehicle with the road below, the tires received less attention in the development of vehicle monitoring technology. Determining the pressure of the tires is important, but about 67% of drivers cannot determine their tires conditions and do not know when to replace their worn-out tires. The tire wear is important as it increases the probability of hydroplanning. This study is created in order to provide a new insight of the effect of different driving behaviours to the wear of the tire. In order to know what variables causes greater wear to a tire, a simulation that represents the real-life conditions are required. The simulations will be made by using formulas based on Brush model and Savkoor model. Weight shift model is also implemented in order to obtain a more realistic number. Each condition is isolated with others to gain a clearer difference between conditions. From the simulations one, it is found that the greater the driving angle, the greater the tire wear. The greater the acceleration also provide a difference in the tire wear due to the weight of one side of a vehicle is heavier while the other is lighter. The greater the load or weight the tire sustain, the greater that tire’s wear. On the other hand, tire pressure pose little difference compared to the other variables.

Perancangan awal wind tunnel untuk pengujian turbin angin

Alexander Matthew, Levin Halim — Tue, 11 Oct 2022 00:00:00 -0700

As the supply of natural resources related to petroleum is dwindling, the step that can be taken is to switch to renewable energy sources that can minimize existing problems. Renewable energy sources themselves have several types, namely solar, water, and wind power. Which will be discussed further on the type of wind that is considered quite potential if developed in Indonesia. To be able to produce electrical energy from the wind, a Wind Turbine is also needed which is used as a supporting tool. The development of the Wind Turbine is still very necessary because the Wind Turbine itself needs to be adjusted to the conditions of placement and the conditions of the place that wants to use the Wind Turbine. In addition, to test the Wind Turbine itself is quite difficult because it depends on the uncertain natural conditions and the position of the placement of the Wind Turbine itself. For this reason, the Wind Tunnel can be used to support the research and development of the Wind Turbine. Wind Tunnel itself has several types that are tailored to the desired needs and needs. In this discussion, the Wind Tunnel discussed is a Subsonic type which has a Mach Number < 1. By using the Wind Tunnel itself, it is hoped that the research and analysis process of the Wind Turbine can be helped and it can be easier to find what things need to be developed. As a support for Wind Tunnel design, Solidworks software is also used which can be used to support the desired Wind Tunnel design process, because it can also be used to simulate.

Pengembangan perangkat lunak optimasi ekonomi dan analisa finansial PLTS studi kasus PLTS 10 MWAC

Apri Setiawan, Agus Hermanto — Tue, 11 Oct 2022 00:00:00 -0700

Financial analysis is an analysis that compares costs and benefits to determine whether a project can generate profits over the life of the project. In conducting financial analysis there are several investment feasibility criteria that are commonly used, namely, Net Present Value (NPV), Internal Rate Return (IRR), Benefit Cost Ratio (BCR), and Payback Period (PP). This study aims to develop a financial analysis software for Solar Power Plants which includes cost analysis of investment components (A, B, C, D, & E) and is made using Visual Basic for Application (VBA). In this research, a case study of financial analysis of PLTS 10 MWAC using software that the author developed, then obtained the NPV value of Rp. 939,928,554 > 0, BCR 1.01 > 1, IRR 8.87 % > Weight Average Cost of Capital (WACC) 8.76 %, and Payback Period 9 Years 8 Months < 25 Years (Project life), So it can be concluded that PLTS 10 MWAC is feasible to work on.

Optimasi helm industri ergonomik beserta perancangan dan simulasi molding injeksi

Arif Budi Wicaksono, Abdul Aziz — Wed, 19 Oct 2022 00:00:00 -0700

This research purpose to develop an innovative industrial helmet design that can be integrated with face and ear protection using Triz40 method and then analyzes, designs and simulates injection molding innovations. Injection molding in this study uses two plates. Then industrial helmet model was realized using a 3d print with PLA material. In addition, this study aims to see the effect variations number of gates on filling time and quality predictions. The number of gates varied into 3 types, namely 1, 2 and 4 gates. The results obtained optimally use 1 gate with optimal charging time, defects and prediction of quality. The optimum mold unit dimension is 500 x 500 mm with a clamping force of 3986.86 kN.

Perancangan mesin packing pipa baja otomatis di PT Steel Pipe Industry of Indonesia, Tbk

Aditya Pramono, Heru Arizal, I Made Arsana — Sat, 22 Oct 2022 00:00:00 -0700

The use of automatic technology in the steel pipe packing process is a small part of the use of technology. There is a bottle neck or imbalance in the bundling process or pipe packing because it is still carried out by human workers with a capacity of 3000 pipe rods per work shift. Pipe packing machines sold in the market have dimensions that do not match the rooms at PT. Steel Pipe Industry of Indonesia, Tbk. The design process for this automatic pipe mill machine uses problem methods, literature studies, machine requirements analysis, design concepts, components, and investment BEP calculations. The result of this planning is a machine design that is obtained with a length of 6500 mm, width of 3852 mm, and height of 1500 mm, using a 1.5 Hp, 1000 Rpm motor. The loading simulation results using the solidworks application show the Yield Strength is 2.039e+008 N/m². The maximum load limit is 2.9983e+007 N/m², and the minimum load is 7.331e-004 N/m², the cycle time of this packing machine is 5 minutes. The maximum limit of the load in the simulation above is no more than the Yield Strength of galvanized steel material so it is safe to lift 36 pipe rods in 1 bundling. And the Break Even Point can be achieved for 6 months.

Studi awal material komposit berpenguat serat bambu dengan matriks resin epoksi/hardener sebagai material antipeluru

Harmiansyah, Burmawi, Risky Arman, Rustam Efendi — Sat, 22 Oct 2022 00:00:00 -0700

Bulletproof material is used as a bulletproof vest material that functions to protect the human body from the threat of physical attack, especially attacks from firearms. Bulletproof material serves to reduce the kinetic energy of the projectile so it does not hit the bulletproof vest user. The main material in the manufacture of bulletproof material is steel with a high density so that the weight of the bulletproof material is high which causes the user to be unable to move freely. Composite is a material consisting of two or more elements that have good mechanical properties and low density so that it can be used as an alternative to steel for bulletproof materials. The bulletproof material used was reinforced with bamboo fiber with a matrix of epoxy resin/hardener mixture and the addition of 20, 25, and 30 ml ceramic granules, the composite material was tested for ballistics using a variation of the firing range parameter 2; 2.5; and 3 m. Based on the results of ballistic tests, all variations of the addition of ceramic granules were able to reduce the energy of the projectile with a penetration depth of < 1 mm where the kinetic energy of the projectile was 209.83 joule. Based on the macro photo analysis of projectile traces on the bulletproof material, the cracks that occur in the bulletproof material are ductile cracks due to the spread of the cracks to other areas on the surface of the bulletproof material.

Design and performance test of overshot water wheel with variation of inner diameter

Alif Ramadhan, Asral — Sat, 15 Oct 2022 00:00:00 -0700

This research was conducted to find out how to design an overshot type waterwheel and the effect of variations inner diameter of the overshot type waterwheel on work performance, the waterwheel is classified into the category of picohydro power plants that can generate electricity less than 5000 Watt, the overshot type waterwheel has a motion mechanism using a push water that comes from the top of the waterwheel, the overshot type waterwheel has greater efficiency than other types of waterwheels, therefore to get a large amount of power an overshot type waterwheel is used. The testing of the designed waterwheel has been adapted to conditions in the Riau Province area, where the Riau area has many rivers and reservoirs so it is suitable for use for hydroelectric power plants, and the height of the water fall in the Riau area on average is about 1 meter to 3 meters. The size of the inner diameter of the waterwheel was tested starting from the size of 0.25 m, 0.5 m, 0.75 m, this size variation was made to test whether the effect of the inner diameter of the waterwheel affects the amount of torque produced by the waterwheel by using the same discharge so that it can produce power optimally, a waterwheel with an inner diameter of 0.5 m has the best performance because the efficiency of the waterwheel is the highest, from this test it can be seen that the dimensions of the waterwheel must be directly proportional to the discharge given to the waterwheel so that the power generated more optimal.

Analisis kegagalan sprocket pada transmisi mobil Antawirya

Muhammad Farras Farshal, Sri Nugroho, Yusuf Umardani — Sat, 15 Oct 2022 00:00:00 -0700

Sprocket is one part of the transmission system commonly used in motor vehicles. In transmission system of the eco car Antawirya team from Diponegoro University also uses sprocket as one of its components. When starting first attempt of the race and do full throttle, the sprocket become failure since deformation happens on sprocket. The sprocket run into plastic deformation and then caused chain exiting its path and come off. The purpose of this study is to find the cause of fatigue that occurs by hardness test, chemical composition test and stress analysis. Sprocket use aluminum alloy 7075-T6 as a material. As a result of chemical composition testing, aluminum content is 97.3% which is more than the standard maximum limit of 91.4%. The percentage of zinc is 0.06% while the minimum limit of standard is 5.1%. There are also differences from other chemical elements such as magnesium and copper. The addition of that other elements serves to increase the strength of the material because Al 7075-T6 is well known as material with high strength. The results of stress analysis using ANSYS software found that the loading that occurred produce a Von-Mises stress of 392 MPa and yield strength of the material is 503 MPa, from that figure makes 1.28 a safety factor value and there should be no deformation on the sprocket. As a result of the hardness test, it is known that the value of hardness in the area close to deformation is 76.16 HV while the standard is 175 HV.

Studi komparasi pengaruh penggunaan variasi konsentrasi inhibitor amine oxide terhadap laju korosi pipa baja API 5L grade B di lingkungan fluida drain line

Dian Ahmad Sudali, Priyo Tri Iswanto — Sat, 15 Oct 2022 00:00:00 -0700

API 5L Grade B Steel Pipes is one of the most used in pipeline system for oil and gas industry because it has the appropriate strength and characteristics. Nevertheless, API 5L Grade B Steel Pipes potential for corrosion due to working in a corrosive environment. One of the efforts that can be done to prevent corrosion in this piping system is the use of inhibitors. The purpose of this study was to study the effect of using variations in the concentration of amine oxide inhibitors on the corrosion rate of API 5L Grade B steel pipe in the drain line fluid environment. The inhibitors used in this study were organic inhibitors, namely amine oxide with a concentration variation of 0.5% and 0.9%. Corrosion measurement using Potentiodynamic Polarization method. Tests for composition, microstructure, Vickers hardness, and tensile tests were carried out to support the test data. The results showed that the corrosion rate of API 5L Grade steel pipe in a drain line fluid environment without inhibitors was 68.94 mpy. The addition of amine oxide inhibitor was effective in reducing the corrosion rate and the optimum concentration was obtained at a concentration of 0.9% with a corrosion rate of 8.16 mpy.

Perancangan alat pemotong kayu dengan dua mata pisau menggunakan dinamo sebagai mesin penggerak yang multifungsi

M Miko Mizar, Asnawi Lubis, Tumpal Ojahan Rajagukguk — Mon, 17 Oct 2022 00:00:00 -0700

Technology continues to develop all the time along with the progress of the times, in addition to facilitating human work, the use of machines is very helpful in increasing productivity in a relatively faster time, including wood processing craftsmen in Indonesia. To make it easier for wood craftsmen, a modern saw machine is needed so that it is hoped that the demand from the community can be met. This study aims to design a wood cutting tool and find out how long it takes to cut wood with a thickness of 0.75 cm, 1.75 cm, 2.75 cm and 3.75 cm, and a cutting width of 3 cm. The design of this multifunctional tool uses cutting blades and an AC 220 V – 180 watt dynamo as a driving machine. The result of the design is shaped like a table with two blades that can be used interchangeably, and there is sandpaper on the front that functions as a smoothing part of the cut wood. This tool has a height of 90 cm, a width of 50 cm, a length of 70 cm, and the height of the top blade holder is 15 cm, and the top blade holder is 60 cm long, the sandpaper holder is on the front side. This tool is able to cut the type of wood medang aged approximately 15 years in the form of blocks with a thickness of 0.75 cm in 2.51 seconds, 1.75 cm 3.72 seconds, 2.75 cm in 6.27 seconds, and 3. 75 cm with 8.70 seconds average time.

Pengaruh fraksi massa dan ukuran butir basalt terhadap sifat mekanik komposit hibrid serat rotan

Bely Agusti, Tumpal Ojahan Rajagukguk, Slamet Sumardi, Yusup Hendronursito — Wed, 19 Oct 2022 00:00:00 -0700

Composite is a material that continues to be developed because of its advantages as an engineering material. With its diverse geographical environment, Indonesia has resources that can use as a composite material, and Lampung Province is no exception, which has basalt and rattan fiber resources. This research is needed to determine the effect of using basalt powder as a filler and rattan fiber as a polyester resin matrix composite reinforcement. Basalt was reduced to size variations of 100, 200, and 325 mesh with 2%, 7%, and 12% mass fractions. Rattan is made into fiber and washed with 5% NaOH, then dried. Rattan fibers were arranged randomly with a fixed mass fraction of rattan at 10% with a fiber size of 2 mm in diameter and 5 cm in length. SHCP 2668 polyester resin matrix with 2% catalyst. The composite was made using the hand lay-up method by pressing 3 tons for 15 minutes and drying the composite. Mechanical testing includes tensile strength test based on ASTM D638 standard and three-point bending test based on ASTM D790, macro test observations to determine the shape of the fracture after mechanical testing. ANOVA analysis showed the significant effect of mass fraction and size of basalt powder on tensile strength with a P-value <5%. The basalt particle size contributed 84% dominantly, while the mass fraction was 15.6% to the tensile sterngth. The grain size of the basalt contributes 62.13% to the flexural strength with a significant effect of P-value <10%. In flexural strength, rattan fiber has more influence than tensile stress. The small grain size of the basalt provides a denser bonding density between the particles than the larger particles. Resin can fill small cavities formed by small particles to make the composite board thicker and more robust.

Pengaruh parameter pemesinan dan komposisi campuran polyester - vinylester terhadap keutuhan permukaan silindris

Adam Malik — Sat, 22 Oct 2022 00:00:00 -0700

The surface integrity of the cylindrical machining is an absolute requirement for ready-to-assemble components. This deficiency causes the components to fail to be assembled. This is due to the contribution of various factors involved in producing a cylindrical surface. Especially on the cylindrical surface of components made of composite materials. This study reports the effect of lathe & drill parameters, polyester-vinylester blend composition on roundness, roughness, and changes in surface hardness, as well as the main contribution of these factors. This study aims to examine the influence and contribution of polyester-vinylester blend composition, feedrate, speed and depth of cut on roundness, roughness, and changes in surface hardness of lathe & drill products. To achieve this goal, a series of cylindrical surface machining experiments were carried out on workpieces of the polyester-vinylester blend of different compositions. In the experimental set, the Taguchi L9(4)3-OAs method was used. The experimental results show that the most influential on the roundness and surface roughness is the size of the composition of the polyester-vinylester blend followed by the size of the feedrate carried out. Cutting speed and depth of cut don't really matter. While the change in hardness that is very influential is the feed followed by the depth of cut, the composition of the mixture actually shows the opposite between lathe and drilling. The novelty obtained from this experiment is to obtain the desired surface integrity of the components made of composites by mixing composite matrix materials.

Analisis potensi energi panas matahari untuk digunakan pada sistem refrigerasi absorpsi di bangunan perkantoran

Yusvardi Yusuf, Imron Rosyadi, Mekro Permana Pinem — Sat, 22 Oct 2022 00:00:00 -0700

Conventional cooling systems used in office buildings are one of the causes of ozone layer depletion and greenhouse effects. It requires the advancement of new technologies that are safe for the environment to be used in cooling systems in office buildings. Absorption cooling systems using solar thermal energy have many advantages by using non-destructive working fluids such as water, or in the form of saline solutions. This is a form of energy saving and safe for the environment. In order to obtain real and objective measurement data, testing is performed in two stages, namely the test equipment testing stage and the second stage is data collection when the test equipment is fully operational. The test equipment can be used in stand-alone systems or conventional air conditioners. In the test, it is known that the average percentage of solar thermal energy consumption per day is 40% of total energy so due to solar thermal energy consumption, the average COP value of this system per day is 2 and this value is greater than similar absorption cooling systems. conventional, then by knowing the value of solar energy consumption, can be seen the value of CO₂ emissions reduction of 143.8 kg CO₂ per day.

Pembuatan masker aerator untuk atlet difabel sebagai pencegahan hypoxia saat latihan di masa pandemi COVID-19

Sat, 22 Oct 2022 00:00:00 -0700

During the current COVID-19 pandemic, we are encouraged to always obey health protocols. One of them is to use a mask. The use of masks on athletes, especially athletes with disabilities has a bad impact on the athlete's body itself. Because in the course of training, the athletes will do heavy work that requires adequate oxygen supply. In this case, the mask can reduce the athlete's respiratory effectiveness due to hypoxia. Hypoxia is a condition in which the body lacks oxygen levels. To prevent hypoxia in athletes who must continue to carry out training with the COVID-19 health protocol is to use a mask that can regulate air circulation properly. Therefore, an idea emerged to make an aerator mask that can help the respiratory system and can prevent athletes from getting hypoxia during training during a pandemic, because the aerator mask that we made is equipped with dual fans that can supply oxygen properly. Thus, athletes can exercise without fear of experiencing hypoxia disorders and remain compliant with health protocols.

Perancangan cold storage pada kapal nelayan tradisional terhadap penekanan biaya operasional dan kualitas ikan

Sungkono, Juhana Said — Sat, 22 Oct 2022 00:00:00 -0700

This study takes the case of traditional fishing boats in the Beba Fish Landing Base, Takalar Regency, South Sulawesi. These fishing boats still use conventional fish catch shelters. This method is expensive and risks the quality of fish freshness and even damage to the caught fish. To overcome the problem, a cold storage design is carried out as a place to store fish catches. This study aims to 1) design a cold storage with a capacity of 1 ton of fish with a cooling temperature of 2 - 0°C; 2) calculate the required power and cost; 3) calculate Break Even Point (BEP). The results of this study obtained a cold storage design with dimensions of 248.2 cm x 120.4 cm and a height of 84 cm. The inner and outer walls of cold storage are made of stainless material, while the middle of the Styrofoam is an insulating material. The refrigerant used is R 134 a. Indoor cooling using an air misting system. Cold Storage power 593 Watt at 220 Volt AC voltage. The cost of making 1 cold storage unit is IDR 22.350.000 and the power of a 1 hp generator is IDR 4.000.000, so the total is IDR 26.350.000. Break Even Point (BEP) from the draft is 9,4 months. The results of this design and, maintaining the freshness fish, also reduce the operational costs of traditional fishers.

Rancangan konsep sistem pemantauan dan pengelolaan data produksi berbasis configurable virtual workstation (CVWs)

Andi Arif Isyanto, Sri Raharno — Sat, 22 Oct 2022 00:00:00 -0700

Management of production data that is excessively big and varied is difficult to do manually, so the system that can be used to easily monitor and manage the production data during the process is needed. This study proposes a framework of monitoring and managing production data based on Configurable Virtual Workstation (CVWs) in the rollingstock industry in Indonesia, with a case study of the flat wagon assembly process. The methodology used in this study is by creating a virtual model of assembly elements according to real conditions on the shopfloor. Each of these virtual elements will be connected to each other to get the update information on the shopfloor accurately and transparently to build a cyber-physical system as the first step towards Industry 4.0. Some of the information that can be obtained from the implementations of this system includes: 1) operator working hours; 2) ongoing operation; 3) product completion status; 3) material supply status; 4) product traceability. Based on this information, the actual conditions on the shopfloor can be known and monitored easily and accurately.

Analisis dampak penerapan sistem pengelolaan perkakas berbasis paradigma Industry 4.0: Studi kasus industri padat karya

Laulia Ariyani Rangkuti, Sri Raharno — Sat, 22 Oct 2022 00:00:00 -0700

In general, production orders will not be completed according to the production schedule if there are obstacles in the production process, such as damaged production machines, material shortages, lack of operators and poor tool management. Solution for this problem, namely tool management, is to use the industry 4.0 paradigm through the development of a cyber physical system. Cyber physical system concept for the tool management system is carried out by giving identity to all tools. At the time the tool will be distributed, the tool must first be scanned using hardware. Through this scanning process, data is obtained in the form of the number of tools that have been distributed and available. The tool availability data is not only used to control tool distribution but also very influential in determining tool requirements plans. The next step after designing a tool management system is to analyze the impact that occurs from the application of a tool management system applied to a labor-intensive industry. The method applied in this analysis is the collection and analysis of current conditions and then compared with conditions that will occur as a consequence of implementing the system. In addition, an analysis of the need for the application of a tool management system is also carried out in terms of hardware requirements and systems for data processing.

Studi pengaruh suhu kondensasi R245FA, R515A, dan R1234ZE terhadap kinerja siklus Rankine organik

Marianus R. V. T. Etu, Matheus Magnus Dwinanto, Jack Carol Adolf Pah — Sat, 22 Oct 2022 00:00:00 -0700

The organic Rankine cycle has been used as a power plant that utilizes low temperature heat sources such as biomass, geothermal, and waste heat from conventional power plants. This study was conducted to analyze the energy performance of the organic Rankine cycle as a result of changes in condensation temperature using a more environmentally friendly working fluid as a substitute for R245FA, namely R515A and R1234ZE. The system performance is based on the variation of the condensation temperature using Genetron Properties software with the evaporation temperature being held constant. The important quantities analyzed are mass flow rate, pumping power, heat absorption, turbine pressure ratio, and thermal efficiency. The results of this study indicate that increasing the condensing temperature greatly increases the pumping power consumption but decreases the pressure ratio in the turbine, and the thermal efficiency of the system. The pumping power used to circulate R515A and R1234ZE is greater than that of circulating R245FA, but the thermal efficiency of the ORC system using R1234ZE is greater than that of R245FA and R515A.

Improve penggantian transmisi rantai ke timing belt pada unit lipatan produk alat kesehatan dalam rangka peningkatan produktivitas di PT Aman Jaya

Alfian Ady Saputra, Yulia Widhianti, Maison Sormin — Sat, 22 Oct 2022 00:00:00 -0700

In the current era of globalization, competition is getting tougher, so companies must do something to survive and advance. PT Aman Jaya is a medical device company, where in the manufacture of medical devices, there is a sub process, namely the product folding process. In this process, problems occur that reduce running hours and cause productivity to decrease. The data used is from the company as well as field observations and analyzed to update the transmission of the product folding device, to reduce stoptime so that productivity increases. One of the causes of the problem is the transmission of the folding device, namely the chain. This transmission rusts due to lack of lubrication and if lubricated, the ash of the paper pulp sticks which over time becomes thick. So that the rotation is unstable, the chain jams, detaches from the sprocket, and breaks. After being analyzed and calculated according to the reference, the chain transmission was replaced with a timing belt of type L, number 165L, tooth are 44, length is 408.10 mm, and small pulley is 14, large pulley is 20, axle distance is 120 mm, for 1: 3 of motor ratio, 1500 rpm of rotation and 350 rpm of fold pulley rotation. By using a chain replacement timing belt, it is expected to reduce product folding trouble to increase productivity. The resulting update can reduce the folding problem, from an average stoptime of 74 min to 6 min. By reducing stoptime, folding problems can increase running hours and increase productivity by 40,800pcs.