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<![CDATA[Performance Comparison of Wet Cell HHO Generator with Galvanized Steel and Stainless Steel Electrodes ]]>
<![CDATA[Putri Pratiwi]]>;
<![CDATA[Mastariyanto Perdana]]>;
<![CDATA[Ahmad Fachrurrozi]]>
<![CDATA[ Jurnal Teknik Mesin Vol 11 No 2 (2021): Jurnal Teknik Mesin Vol.11 No.2 October 2021 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2021.v11.i2.172-178
<![CDATA[The excessive use of fossil fuels has many negative impacts on the environment and health. Many studies have been conducted to find solutions to this problem, such as the use of oxy-hydrogen gas (HHO) as an alternative to reduce the use of fossil fuels as a source of energy in vehicles and other applications. The objective of this research is to compare the performance of a wet type HHO generator using two types of electrodes, stainless steel plate and galvanized steel plate. Both generators use nine electrodes with dimensions of 130 mm x 60 mm consisting of two plates at the positive pole (anode), one plate at the negative pole (cathode), and six neutral plates. Calculation of the power consumed by the HHO generators, the flow rate of the gas produced, and the efficiency of these generators are carried out to compare the performance of both HHO generators. The results showed that the performance of the HHO generator using stainless steel plate as an electrode was better than galvanized steel which was indicated by a higher efficiency value.]]>
<![CDATA[Experimental Investigation on Performance ByPass Cycle Multi-Split Cooling System-VRF ]]>
<![CDATA[Arfidian Rachman]]>;
<![CDATA[Nofriady Handra]]>;
<![CDATA[Lisa Nesti]]>
<![CDATA[ Jurnal Teknik Mesin Vol 11 No 2 (2021): Jurnal Teknik Mesin Vol.11 No.2 October 2021 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2021.v11.i2.179-183
<![CDATA[Variable refrigerant flow air-conditioning (VRF) systems are important and widely used building energy systems around the world. In this study, the performance of a multi-split VRF system using the bypass cycle is evaluated using the experiment as a possible sub-cooling method to prevent flash gas generation in liquid pipelines. The experimental for the multi-split VRF system is developed by considering the applications of the bypass cycle, and is validated with experimental data. The results of the tests that have been carried out are obtained in the vapor compression cycle with a bypass cycle, an increase in cooling capacity of 2.96% and an energy saving ratio (EER) of 1.72%. The input power of the bypass cycle is reduced by up to 2.45% when the performance of the multi-split VRF systems with bypass cycle cooling capacity conditions.]]>
<![CDATA[Manufacturing Technique of Aluminum Plate Waste Crusher ]]>
<![CDATA[Imadudin Abdurohim]]>;
<![CDATA[Prasetyo]]>;
<![CDATA[Albert Daniel Saragih]]>
<![CDATA[ Jurnal Teknik Mesin Vol 11 No 2 (2021): Jurnal Teknik Mesin Vol.11 No.2 October 2021 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2021.v11.i2.184-188
<![CDATA[With the increase in the amount of unused aluminum plate waste every year, it can increase environmental damage if no preventive measures are taken, so it must be done processing the unused plate waste by recycling. One of the recycling processes is by destroying it before it is thawed. The plate crusher is designed to have dimensions (861 mm x 250 mm x 910 mm), with the main power being an electric motor of 0.5 HP (0.37 kW) and a motor shaft rotation of 1400 rpm. The type of knife used has dimensions of 100 mm x 10 mm which have a disc-like shape that has 4 cutting blades at each end. The tool is designed to use two rotating shafts with 10 crushing blades placed on each part of the shaft. The crusher is designed using the Solidworks Application.]]>
<![CDATA[The Accuracy Bound for Positioning the 5R Planar Parallel Manipulator Subjected to Uncertainties in Dimensions and Actuations ]]>
<![CDATA[Adriyan Adriyan]]>;
<![CDATA[Asmara Yanto]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2022.v12.i1.1-10
<![CDATA[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.]]>
<![CDATA[Production Process of Steam Power Plant and Calculation of Thermal Efficiency: Case Study of Teluk Sirih Steam Power Plant ]]>
<![CDATA[Putri Pratiwi]]>;
<![CDATA[Zakil Hadi]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2022.v12.i1.26-31
<![CDATA[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.]]>
<![CDATA[Comparison of Propeller Turbine Performance Using Airfoil Blades and Without Airfoil ]]>
<![CDATA[Marfizal Marfizal]]>;
<![CDATA[Dedi Wardianto]]>;
<![CDATA[Sufiyanto Sufiyanto]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2022.v12.i1.11-16
<![CDATA[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.]]>
<![CDATA[Study of the VRF/VRV Air Conditioning System in the Hospital: A Review of Economic and Environmental Aspects ]]>
<![CDATA[Arfidian Rachman]]>;
<![CDATA[Lisa Nesti]]>;
<![CDATA[Asmara Yanto]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2022.v12.i1.17-25
<![CDATA[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.]]>
<![CDATA[Manufacturing System Design of a CNC Laser Engraver ]]>
<![CDATA[Anrinal]]>;
<![CDATA[Irfan Mandala Putra]]>;
<![CDATA[Risky Oudio Viola]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2022.v12.i1.32-38
<![CDATA[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,-.]]>
<![CDATA[Experimental Study of Mechatronic System On Control of Air Flow Temperature ]]>
<![CDATA[Asmara Yanto]]>;
<![CDATA[Adriyan Adriyan]]>;
<![CDATA[Rozi Saferi]]>;
<![CDATA[M. Hanif Al Hafizh]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2022.v12.i1.39-46
<![CDATA[In this work, an experimental study of a mechatronic system on control of airflow temperature has been conducted to identify the characteristics of the system. The system is tested by several reference temperatures from the monitor panel that programmed on the computer. The measurement of the output temperature by the sensor that is expected to be the same as the reference temperature is also displayed on the same monitor panel. While the measurement of AC power consumption by an actuator in the form of a heater is carried out by measuring the AC voltage on the heater during control. This voltage is measured with a computer-based oscilloscope. Based on the test results, with the initial temperature around the room temperature and reference temperature, the system time constant can be identified. This time constant value is obtained based on the output temperature graph which is identical to the first-order system response. Thus, this experimental study succeeded in identifying the characteristics of the system in the form of a time constant and the system was identified as identical to the first order system.]]>
<![CDATA[The Effect of Adding Primary Epoxy on the Corrosion Rate of Low Carbon Steel in 3.56% NaCl Solution ]]>
<![CDATA[Ismet Eka Putra]]>;
<![CDATA[M. Fachran Wahyudi]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022 ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP ]]>
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DOI: 10.21063/jtm.2022.v12.i1.47-50
<![CDATA[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.]]>
