Motor Diesel dipengaruhi oleh beberapa aspek operasional. Diantaranya: waktu penginjeksian bahan bakar (timing injection), tekanan bahan bakar (fuel pressure), dan tekanan udara yang masuk (boost pressure). Modifikasi akan dilakukan untuk mengubah parameter menggunakan piggyback. Terdapat tiga hal yang akan diteliti, yaitu mengamati perubahan pada daya dan torsi jika mengubah parameter fuel pressure, parameter injection timing, dan parameter tekanan turbo. Pengujian dilakukan menggunakan alat bernama On-Wheel Dynamometer untuk mengetahui daya dan torsi yang dihasilkan pada kendaraan bermotor. Unjuk Kerja Mesin Diesel dapat meningkat Daya sebanyak 8% dan torsi sebanyak 11% dengan perubahan parameter pressure fuel +20, injection timing +5°, dan parameter turbo pressure 1.2 bar.
{"title":"Studi Pengaruh Waktu Injeksi, Tekanan Bahan Bakar, dan Tekanan Turbo Terhadap Unjuk Kerja Mesin Diesel 2GD-FTV","authors":"T. Sutrisno, Pradityo Putra Purnomo","doi":"10.9744/jtm.19.1.17-20","DOIUrl":"https://doi.org/10.9744/jtm.19.1.17-20","url":null,"abstract":"Motor Diesel dipengaruhi oleh beberapa aspek operasional. Diantaranya: waktu penginjeksian bahan bakar (timing injection), tekanan bahan bakar (fuel pressure), dan tekanan udara yang masuk (boost pressure). Modifikasi akan dilakukan untuk mengubah parameter menggunakan piggyback. Terdapat tiga hal yang akan diteliti, yaitu mengamati perubahan pada daya dan torsi jika mengubah parameter fuel pressure, parameter injection timing, dan parameter tekanan turbo. Pengujian dilakukan menggunakan alat bernama On-Wheel Dynamometer untuk mengetahui daya dan torsi yang dihasilkan pada kendaraan bermotor. Unjuk Kerja Mesin Diesel dapat meningkat Daya sebanyak 8% dan torsi sebanyak 11% dengan perubahan parameter pressure fuel +20, injection timing +5°, dan parameter turbo pressure 1.2 bar.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78699835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-30DOI: 10.21063/jtm.2022.v12.i1.61-64
H. Hafni, Rifqi Rifqi
Shielded Metal Arc Welding is a liquid welding process (fusion welding) that produces heat from an electric arc between the electrode and the workpiece. The depth of fusion formed is determined by the heat input, the electrode angle and the welding direction. The research was conducted in the Mechanical Engineering laboratory of the Padang Institute of Technology. The test material used is low carbon steel 10 mm thick, 100 mm long and 100 mm wide. Welding is carried out on the surface of the work material as many as 4 welding lines, each of which has a distance of 20 mm. Weld length 100 mm. The specifications of the AWS E 6013 electrode are 3.2 mm in diameter. AC SMAW welding machine with a voltage of 30 Volts. Welding is carried out according to the working drawings, the welding current is 85 Ampere, the electrode angles are 700 and 850, the weld length is 100 mm and the welding direction is reversed (the electrode attracts welding fluid). From the welding, the welding speed is 2.51 mm/s for the 700 electrode angle and 2.48 mm/s for the 850 electrode angle. The heat input for each electrode angle is 1024.09 J/mm. at the 700 electrode angle has a penetration presentation of 10.85%, 1.14% greater than the 850 electrode angle. This shows that the electrode angle affects the penetration depth and weld width.
保护金属电弧焊是一种液体焊接工艺(熔焊)，通过电极和工件之间的电弧产生热量。熔化形成的深度由热输入、电极角度和焊接方向决定。这项研究是在巴东理工学院机械工程实验室进行的。试验材料为低碳钢，厚10mm，长100mm，宽100mm。在工作材料表面进行焊接，多达4条焊缝，每条焊缝之间的距离为20mm。焊缝长度100mm。AWS E 6013电极的规格为直径3.2 mm。电压为30伏的交流SMAW焊机。焊接按工作图纸进行，焊接电流为85安培，电极角度为700和850，焊缝长度为100mm，焊接方向反向(电极吸焊液)。从焊接角度看，700电极角的焊接速度为2.51 mm/s, 850电极角的焊接速度为2.48 mm/s。每个电极角的热输入为1024.09 J/mm。在700电极角处，穿透率为10.85%，比850电极角处高1.14%。这表明电极角度影响熔深和焊缝宽度。
{"title":"Effect of 70o and 85o Electrode Angles on Reverse Welding Techniques On Fusion Depth","authors":"H. Hafni, Rifqi Rifqi","doi":"10.21063/jtm.2022.v12.i1.61-64","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.61-64","url":null,"abstract":"Shielded Metal Arc Welding is a liquid welding process (fusion welding) that produces heat from an electric arc between the electrode and the workpiece. The depth of fusion formed is determined by the heat input, the electrode angle and the welding direction. The research was conducted in the Mechanical Engineering laboratory of the Padang Institute of Technology. The test material used is low carbon steel 10 mm thick, 100 mm long and 100 mm wide. Welding is carried out on the surface of the work material as many as 4 welding lines, each of which has a distance of 20 mm. Weld length 100 mm. The specifications of the AWS E 6013 electrode are 3.2 mm in diameter. AC SMAW welding machine with a voltage of 30 Volts. Welding is carried out according to the working drawings, the welding current is 85 Ampere, the electrode angles are 700 and 850, the weld length is 100 mm and the welding direction is reversed (the electrode attracts welding fluid). From the welding, the welding speed is 2.51 mm/s for the 700 electrode angle and 2.48 mm/s for the 850 electrode angle. The heat input for each electrode angle is 1024.09 J/mm. at the 700 electrode angle has a penetration presentation of 10.85%, 1.14% greater than the 850 electrode angle. This shows that the electrode angle affects the penetration depth and weld width.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75650422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-30DOI: 10.21063/jtm.2022.v12.i1.66-71
Karnova Yanel
Plastics can be grouped into two groups, thermoplast plastics and thermoset plastics. Thermoplast plastic is a plastic that can be molded over and over again in the presence of heat. Thermoplast plastics include PE (Polyethylene), PP (Polypropylene), PS (Polystyrene), ABS (Abutile Butadine Styrene), Nylon, PET (Polyethylene Terephthalete), POM (Polyacetal), PC (Polycarbonate), etc. At process of making vases that presented in this work, the plastic material used is PP. To investigate the characteristics of the resulting product, the mechanical characteristics of the print are tested by tensile testing. By using 100% recycled PP waste raw materials using hand molding, it turned out to be successful and became a new product (flower vase) that can be utilized. But, there are decrease in the quality of virgin plastic about 31.7% of modulus of elasticity value, 94.81% of stress value and 91% of strain value. From the tensile test results, it can be concluded that the recommended printing temperature is 220 oC.
{"title":"Product Characteristics of 100% Recycled Polypropylene Plastic","authors":"Karnova Yanel","doi":"10.21063/jtm.2022.v12.i1.66-71","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.66-71","url":null,"abstract":"Plastics can be grouped into two groups, thermoplast plastics and thermoset plastics. Thermoplast plastic is a plastic that can be molded over and over again in the presence of heat. Thermoplast plastics include PE (Polyethylene), PP (Polypropylene), PS (Polystyrene), ABS (Abutile Butadine Styrene), Nylon, PET (Polyethylene Terephthalete), POM (Polyacetal), PC (Polycarbonate), etc. At process of making vases that presented in this work, the plastic material used is PP. To investigate the characteristics of the resulting product, the mechanical characteristics of the print are tested by tensile testing. By using 100% recycled PP waste raw materials using hand molding, it turned out to be successful and became a new product (flower vase) that can be utilized. But, there are decrease in the quality of virgin plastic about 31.7% of modulus of elasticity value, 94.81% of stress value and 91% of strain value. From the tensile test results, it can be concluded that the recommended printing temperature is 220 oC.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75824906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-30DOI: 10.21063/jtm.2022.v12.i1.82-91
Sulaeman, Ikhsan Arif
Plumbing system planning is an important part of a building to meet clean water needs. This study aims to plan a plumbing system for clean water in the ITP main building. Meeting the needs of clean water is planned to use water sources from shallow wells that are pumped into the roof tank (roof tank) and flowed gravitationally to pump two. The results of the calculation of the average water requirements of office buildings are 53 liters / day. The capacity of the roof tank needed to accommodate clean water is 2,100 liters, using two roof tanks with a capacity of 1,050 liters each. Roof tanks are placed on top of towers as high as 7.15 m. The diameter of the clean water pipe needed is 20-50 mm. The pump power needed is 0.071 kw and for the second pump is 0.63 kw. The type of pipe planned for this clean water plambing system is Polyvinyl Chloride (PVC) pipe.
{"title":"Planning for Clean Water Needs in ITP Main Building","authors":"Sulaeman, Ikhsan Arif","doi":"10.21063/jtm.2022.v12.i1.82-91","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.82-91","url":null,"abstract":"Plumbing system planning is an important part of a building to meet clean water needs. This study aims to plan a plumbing system for clean water in the ITP main building. Meeting the needs of clean water is planned to use water sources from shallow wells that are pumped into the roof tank (roof tank) and flowed gravitationally to pump two. The results of the calculation of the average water requirements of office buildings are 53 liters / day. The capacity of the roof tank needed to accommodate clean water is 2,100 liters, using two roof tanks with a capacity of 1,050 liters each. Roof tanks are placed on top of towers as high as 7.15 m. The diameter of the clean water pipe needed is 20-50 mm. The pump power needed is 0.071 kw and for the second pump is 0.63 kw. The type of pipe planned for this clean water plambing system is Polyvinyl Chloride (PVC) pipe.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"122 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86571034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Electricity is a strategic energy resource and is very important for the livelihood of many people. The government has tried to free Indonesia from the electricity crisis and is trying to find alternative uses of new and renewable energy (EBT). The government has committed that NRE will continue to be developed to ensure energy security in Indonesia and meet the growing demand for electricity. The government has set a target of 23% share of clean energy in the national energy mix in 2025 and 31% in 2030 through the National Energy Policy (KEN) and the General National Energy Plan (RUEN). To succeed the government program is to take advantage of the potential energy sources that exist around people's residences. However, one of the obstacles is the remote location so that access is difficult. In addition, the village community lacks knowledge about microhydro technology. Therefore it is necessary to design a turbine that is not complicated to manufacture. The complexity is in the manufacture of turbine blades which must be aerodynamic and affect performance. Therefore, it is necessary to do research on turbine blades that are not aerodynamic and how they perform. This research was conducted experimentally using a propeller turbine and tested on 3 different types of blades, namely, in this study three types of blades were created and designed. The aerodynamic cross-section blade and the square cross-section blade with a thickness of 3 mm without curvature, the blade with a rectangular cross-sectionsquare with a thickness of 2 mm with curvature (camber). which is made of steel plate manufacture by welding. The turbine blade diameter used is 150 mm with a total of 4 blades.
{"title":"Comparison of Propeller Turbine Performance Using Airfoil Blades and Without Airfoil","authors":"Marfizal Marfizal, Dedi Wardianto, Sufiyanto Sufiyanto","doi":"10.21063/jtm.2022.v12.i1.11-16","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.11-16","url":null,"abstract":"Electricity is a strategic energy resource and is very important for the livelihood of many people. The government has tried to free Indonesia from the electricity crisis and is trying to find alternative uses of new and renewable energy (EBT). The government has committed that NRE will continue to be developed to ensure energy security in Indonesia and meet the growing demand for electricity. The government has set a target of 23% share of clean energy in the national energy mix in 2025 and 31% in 2030 through the National Energy Policy (KEN) and the General National Energy Plan (RUEN). To succeed the government program is to take advantage of the potential energy sources that exist around people's residences. However, one of the obstacles is the remote location so that access is difficult. In addition, the village community lacks knowledge about microhydro technology. Therefore it is necessary to design a turbine that is not complicated to manufacture. The complexity is in the manufacture of turbine blades which must be aerodynamic and affect performance. Therefore, it is necessary to do research on turbine blades that are not aerodynamic and how they perform. This research was conducted experimentally using a propeller turbine and tested on 3 different types of blades, namely, in this study three types of blades were created and designed. The aerodynamic cross-section blade and the square cross-section blade with a thickness of 3 mm without curvature, the blade with a rectangular cross-sectionsquare with a thickness of 2 mm with curvature (camber). which is made of steel plate manufacture by welding. The turbine blade diameter used is 150 mm with a total of 4 blades.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79586735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-30DOI: 10.21063/jtm.2022.v12.i1.32-38
Anrinal, Irfan Mandala Putra, Risky Oudio Viola
This study aims to design manufacturing system of a CNC Laser Engraver Machine. The design starts from the laser module unit as input at the design stage of the 3-Axis CNC Machine to drive the laser. There are several important components in the production process of the CNC Laser Engraver machine, such as the Box Controller, the Laser Engraver Module unit, the Z-Axis unit, the X-Axis unit, and the Y-Axis unit. Bill of Material (BOM) design is very important to ensure the quantity and specification of materials, and the production of CNC Laser Engraver machines uses various types of production processes and ends with the assembly process. This CNC Laser Engraver machine was completed within 35 working hours, with a cost of Rp. 10,080,000,-.
{"title":"Manufacturing System Design of a CNC Laser Engraver","authors":"Anrinal, Irfan Mandala Putra, Risky Oudio Viola","doi":"10.21063/jtm.2022.v12.i1.32-38","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.32-38","url":null,"abstract":"This study aims to design manufacturing system of a CNC Laser Engraver Machine. The design starts from the laser module unit as input at the design stage of the 3-Axis CNC Machine to drive the laser. There are several important components in the production process of the CNC Laser Engraver machine, such as the Box Controller, the Laser Engraver Module unit, the Z-Axis unit, the X-Axis unit, and the Y-Axis unit. Bill of Material (BOM) design is very important to ensure the quantity and specification of materials, and the production of CNC Laser Engraver machines uses various types of production processes and ends with the assembly process. This CNC Laser Engraver machine was completed within 35 working hours, with a cost of Rp. 10,080,000,-.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73975358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-30DOI: 10.21063/jtm.2022.v12.i1.17-25
A. Rachman, L. Nesti, Asmara Yanto
Heating, ventilation and air cooling (HVAC) systems are the largest users of electrical energy in the hospital. The results showed that hospitals represent about 60% of the total energy consumption in the utility building sector. In this paper, it is presented about energy efficiency and the potential for energy savings in HVAC systems in hospitals. Conditioning systems with Variable Refrigerant Flow (VRF) or Variable Refrigerant Volume (VRV) Technology allow for greater energy efficiency and cost savings compared to traditional HVAC systems.
{"title":"Study of the VRF/VRV Air Conditioning System in the Hospital: A Review of Economic and Environmental Aspects","authors":"A. Rachman, L. Nesti, Asmara Yanto","doi":"10.21063/jtm.2022.v12.i1.17-25","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.17-25","url":null,"abstract":"Heating, ventilation and air cooling (HVAC) systems are the largest users of electrical energy in the hospital. The results showed that hospitals represent about 60% of the total energy consumption in the utility building sector. In this paper, it is presented about energy efficiency and the potential for energy savings in HVAC systems in hospitals. Conditioning systems with Variable Refrigerant Flow (VRF) or Variable Refrigerant Volume (VRV) Technology allow for greater energy efficiency and cost savings compared to traditional HVAC systems.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"435 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76497019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-30DOI: 10.21063/jtm.2022.v12.i1.47-50
I. Eka Putra, M. F. Wahyudi
The corrosion process occurs in almost all materials, especially metals, slowly but surely, which can cause a material to have a limited service life. Corrosion cannot be prevented but the rate can be reduced. One of the methods to inhibit the effective corrosion rate is by giving epoxy primer treatment. This study aims to examine the effect of adding epoxy primer on the corrosion rate of low carbon steel immersed in a 3.56% NaCl solution. This research was conducted using 27 specimens in 9 vessels, each vessel contained 3 specimens immersed in low carbon steel without treatment, oil paint and epoxy primer. Volume of 1 liter of 3.56% NaCl solution for 1 vessel. The results of this study indicate that the epoxy primer is able to inhibit the corrosion rate well. The reduction in weight of low carbon steel treated with oil paint is much greater than that of untreated low carbon steel using epoxy primer. The lowest corrosion rate was given by applying epoxy primer in 20 days of immersion with an average value of 0.0003761136666 mpy and the highest corrosion rate with paint treatment in 10 days of immersion with an average value of 0.004513367 mpy.
{"title":"Effect of Adding Primary Epoxy on the Corrosion Rate of Low Carbon Steel in 3.56% NaCl Solution","authors":"I. Eka Putra, M. F. Wahyudi","doi":"10.21063/jtm.2022.v12.i1.47-50","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.47-50","url":null,"abstract":"The corrosion process occurs in almost all materials, especially metals, slowly but surely, which can cause a material to have a limited service life. Corrosion cannot be prevented but the rate can be reduced. One of the methods to inhibit the effective corrosion rate is by giving epoxy primer treatment. This study aims to examine the effect of adding epoxy primer on the corrosion rate of low carbon steel immersed in a 3.56% NaCl solution. This research was conducted using 27 specimens in 9 vessels, each vessel contained 3 specimens immersed in low carbon steel without treatment, oil paint and epoxy primer. Volume of 1 liter of 3.56% NaCl solution for 1 vessel. The results of this study indicate that the epoxy primer is able to inhibit the corrosion rate well. The reduction in weight of low carbon steel treated with oil paint is much greater than that of untreated low carbon steel using epoxy primer. The lowest corrosion rate was given by applying epoxy primer in 20 days of immersion with an average value of 0.0003761136666 mpy and the highest corrosion rate with paint treatment in 10 days of immersion with an average value of 0.004513367 mpy.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78244216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-30DOI: 10.21063/jtm.2022.v12.i1.1-10
Adriyan Adriyan, Asmara Yanto
This article is aimed to determine the accuracy bound for positioning the 5R planar parallel manipulator under the uncertainties in its dimensions and actuation. The accuracy bound is investigated numerically using the interval analysis and multi-dimensional bisection method (MDBM). These numerical methods can give multiple solutions within the workspace of the manipulator. Then, the exact solution is utilized for comparison with the numerical solutions. It is shown that the interval analysis via the interval Newton method gives the guaranteed bounds for positioning accuracy. Meanwhile, the MDBM and the exact solution coupling with the Monte Carlo simulation produce a scattered random value in a parallelogram shape inside the solution yielded by the interval Newton method. Overall, those three methods give nearly a good agreement in terms of that accuracy, but they are different at computation time.
{"title":"Accuracy Bound for Positioning the 5R Planar Parallel Manipulator Subjected to Uncertainties in Dimensions and Actuations","authors":"Adriyan Adriyan, Asmara Yanto","doi":"10.21063/jtm.2022.v12.i1.1-10","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.1-10","url":null,"abstract":"This article is aimed to determine the accuracy bound for positioning the 5R planar parallel manipulator under the uncertainties in its dimensions and actuation. The accuracy bound is investigated numerically using the interval analysis and multi-dimensional bisection method (MDBM). These numerical methods can give multiple solutions within the workspace of the manipulator. Then, the exact solution is utilized for comparison with the numerical solutions. It is shown that the interval analysis via the interval Newton method gives the guaranteed bounds for positioning accuracy. Meanwhile, the MDBM and the exact solution coupling with the Monte Carlo simulation produce a scattered random value in a parallelogram shape inside the solution yielded by the interval Newton method. Overall, those three methods give nearly a good agreement in terms of that accuracy, but they are different at computation time.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"409 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74116939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-30DOI: 10.21063/jtm.2022.v12.i1.26-31
P. Pratiwi, Zakil Hadi
The performance of a power plant can be known from the calculation of efficiency in the generating sector. Steam power plants utilize a series of energy conversion processes including: conversion of chemical energy into thermal energy when extracting heat from coal as fuel to heat boilers, conversion of thermal energy into mechanical energy in turbines and conversion of mechanical energy into electrical energy in generators. Like other steam power plants, the Teluk Sirih PLTU located in Bungus Teluk Kabung, West Sumatra has the same energy production process. it's just that the source of the water is taken from the sea so it requires special treatment to turn the water into water suitable for producing steam used in this power plant. The electricity production process will be explained in this study and an efficiency calculation process with a simple Rankine cycle is carried out to determine the efficiency of this power plant. From the calculation results, the thermal efficiency of PLTU Teluk Sirih is 29%. Based on the results of these calculations, it is known that the Telusk Sirih PLTU can be classified as a power plant with good efficiency.
{"title":"Production Process of Steam Power Plant and Calculation of Thermal Efficiency: Case Study of Teluk Sirih Steam Power Plant","authors":"P. Pratiwi, Zakil Hadi","doi":"10.21063/jtm.2022.v12.i1.26-31","DOIUrl":"https://doi.org/10.21063/jtm.2022.v12.i1.26-31","url":null,"abstract":"The performance of a power plant can be known from the calculation of efficiency in the generating sector. Steam power plants utilize a series of energy conversion processes including: conversion of chemical energy into thermal energy when extracting heat from coal as fuel to heat boilers, conversion of thermal energy into mechanical energy in turbines and conversion of mechanical energy into electrical energy in generators. Like other steam power plants, the Teluk Sirih PLTU located in Bungus Teluk Kabung, West Sumatra has the same energy production process. it's just that the source of the water is taken from the sea so it requires special treatment to turn the water into water suitable for producing steam used in this power plant. The electricity production process will be explained in this study and an efficiency calculation process with a simple Rankine cycle is carried out to determine the efficiency of this power plant. From the calculation results, the thermal efficiency of PLTU Teluk Sirih is 29%. Based on the results of these calculations, it is known that the Telusk Sirih PLTU can be classified as a power plant with good efficiency.","PeriodicalId":31956,"journal":{"name":"Jurnal Teknik Mesin","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84282222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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