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Control of Natrium Oxide (NOX) and Carbon Oxide (CO) through Catalyst Hydro Carbon Coffee Leather Waste on the Motor Fuel Dani Irawan; Mujahid Wahyu; Nila Nurlina
VANOS Journal of Mechanical Engineering Education Vol 5, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v5i2.9105

The research objective was to determine the effect of using HCL solution and coffee bean husk on levels of (Sodium Oxide) Nox and Carbon Oxide (CO) . The method of this research is tru experiment on the process of carbon activation carried out by using HCl solution. The results showed that there was an effect of coffee beans and the use of HCL solutions on Nox and CO levels ( can reduce CO exhaust emissions in the range of 6.62-39.02% and reduce exhaust emissions of NOx in the range 13.08-39.05%)

A Numerical Simulation on characteristic flow of Ahmed Body Model with Slanted Angle Syamsuri Syamsuri; Zain Lillahulhaq; Muhammad Abrory
VANOS Journal of Mechanical Engineering Education Vol 5, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v5i2.9479

Simplify car models such as Ahmed body is commonly used in numerical simulation because the aerodynamic forces that occur around the car are well captured. Various conditions around Ahmed body models change aerodynamic condition around the vehicle. Behind Ahmed body model, 2 secondary flow vortices are formed, called the twin vortex. This study explains the effect of various inlet velocities to the aerodynamic forces around the car at various inlet velocities of 35 m / s, 40 m / s and 50 m / s. This research simulate the Ahmed body model in 2D steady with the realizable k-epsiloin turbulence model. The Ahmed body model used in this study has 30o slope angle. At inlet velocity of 40 m / s wake that is formed the smallest size. At the inlet condition 40 m / s fluid flow has enough energy to suppress the wake that forms on the twin vortex and produces a small wake. Fluid flow at the bottom of the vehicle tends to be stable and produces similar trandline at various velocity.

Electrical Installation and Calculation Analysist of Roll Bending Machine Drive System Susilawati Susilawati; Muhammad Fahmi; Agus Haris Abadi
VANOS Journal of Mechanical Engineering Education Vol 5, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v5i2.9121

Bending and rolling service providers in Subang Regency are still minimal, based on observation data in five workshops, there is only one workshop that provides bending and rolling services, in addition, in the manufacture of the bending roll machine, it is necessary to have an electrical installation as the power that drives the drive system and analysis of the calculation of the drive system as planning to determine and install the drive system to be used. This final project is a qualitative descriptive study with the stage of data collection, wiring diagrams and calculations, installation, testing, and analysis. The results of the study can be concluded that: (1) the electrical installation uses two main components including a 1 phase 1.5 HP electric motor and a 15 A cam starter 3, (2) the analysis of the calculation of the drive system includes the calculation of the power of the motor drive with the results: driving torque = 269 , 66 Nm, Driven torque = 210.66 Nm, calculation of the final rotation ratio of the roller with the results: the final rotation ratio n3 = 39.94 rpm, chain calculation ratio with chain speed results: v = 0.15 m / s, the amount of chain workload = 88 kg, comparison of theoretical calculations with technical calculations (measured tests) which include electric motors: (1400 rpm): (1403 rpm) difference = 3 rpm, speed reducer = (46.6 rpm): (59.93 rpm) difference = 13.33 rpm, main shaft sprocket = (39.94 rpm):(32, 83) difference = 7.11 rpm.

Critical Thinking Skills through Industrial Revolution 4.0 for Vocational Education Muhammad Ari Agung Wibowo; Sudji Munadi
VANOS Journal of Mechanical Engineering Education Vol 5, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v5i2.8784

ABSTRACT Research is presented to map State Vocational High School (SMKN) in Boyolali based on Higher Order Thinking Skills (HOTS) owned by students. HOTS is indispensable in facing critical thinking skills in the 21st century. The research used uses a qualitative type of survey approach. Students in vocational schools are given cognitive questions oriented to HOTS which refers to Bloom's taxonomy, in the form of evaluating, analyzing, and creating. Questions are presented in multiple choice forms and have been validated with the questmaster program. The results showed that HOTS owned by students in Boyolali Vocational High School was still relatively low, ie 36% at SMKN 1 Klego, 37% in SMKN Nogosari, and 41% in students at SMKN 1 Klego.

Design of Lifter Flyover Segment with a Structure of Lifting Beam can Escape Pairs Dhimas Satria; Aswata Aswata; Imron Rosyadi; Rina Lusiani; Erny Listijorini; Fadhil Arief
VANOS Journal of Mechanical Engineering Education Vol 5, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v5i2.9123

The flyover development today is very much at all to do because it is one solution as degrading congestion and lifter segment flyover is one important tool in the construction of flyovers. This final project offers an example of the calculation and planning lifter segment fly over the beam structure for lifting can be separated pairs which can later be changed in accordance with the specification segment flyover to be lifted. The final project is expected to be one of the references manufacture segments lifter fly over. This design uses Pahl and Beitz method and the results of this research. Specifications lifter segment fly over with beam structure for lifting to be loose tide is Lifting Equipment; Wire rope with two types of options on each drum are strands left and right torsion. Mechanism trolley; Can move on the path along the 3,019 mm, diameter the wheel trolley 381 mm, Trolley the wheel shaft diameter: 12 cm or 120 mm with material JIS S45C. Struktur lifter; Beam lifting using a beam with a weight per unit length of 1.97 N / mm with JIS G3101 SS540 material along the 4900 mm and a surface area of retaining cylindrical pedestal A of 5024 mm2 with material JIS G3101 SS540. The mechanism of motion lifter can move on the path along the 4000 mm. Wheel lifter diameter 533.4 mm. Hydraulic of lifters driver using a double acting hydraulic with a maximum

Online Thesis Exam Evaluation Using Zoom Cloud Meeting During the Covid-19 Pandemic Nurcholish Arifin Handoyono; Suparmin Suparmin
VANOS Journal of Mechanical Engineering Education Vol 5, No 2 (2020)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v5i2.8889

The research aims to obtain a description of: (1) supporting factors; and (2) Inhibiting factors for the online thesis exam using the zoom cloud meeting during the COVID-19 pandemic. This type of research is an evaluation using the CIPP model (Context, Input, Process, and Product). The research subjects were students of the study program of PVTM FKIP UST who had conducted an online thesis examination consisting of 28 students. Data collection techniques used questionnaires, interviews, and documentation. The data analysis technique used an average analysis which was assessed based on the assessment category. The results showed that: (1) The supporting factors for the online thesis examination using Zoom Cloud Meeting were: (a) The context aspect of 3.22 was categorized as high; (b) the input aspect of 3.16 is categorized as high; (c) the process aspect of 3.04 is categorized as high; and (d) the product aspect is 3.42 which is categorized as very high; and (2) factors inhibiting the online thesis exam using Zoom Cloud Meeting, namely: (a) Weak internet connection; (b) There are obstacles during the examination process; and (c) Inefficient examination time

Failure of 150 KV Power Transformer in Indication of Dissolved Gas Analysis Test in Total Dissolved Combustile Gas (TDCG) Method Irwanto Irwanto
VANOS Journal of Mechanical Engineering Education Vol 6, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v6i1.10516

A transformer is an electrical device to change the voltage from one level to a certain level with the same frequency that is generated from the generator. This transformer is used in a power plant to increase the voltage from the generator to be supplied to extra high voltage substations. By knowing the type and amount of gas in the transformer oil, it can be seen that the failure occurred. Preventive steps can be taken before the transformer is more severely damaged or a breakdown which will result in disrupted and detrimental electrical energy supply. The method used in this research is data collection methods used are observation, interviews and participation conducted at PT. Krakatau, Serang Banten. The method used to determine the failure of the transformer is the Dissolved Gas Analysis (DGA) method. The DGA test uses several methods to interpret the data, these methods are Total Dissolved Combustile Gas (TDCG), Key Gasses, Doernenburg Ratio, Roger's Ratio, IEC Ratio and Duval's Triangel. The method used in this research is direct observation of the process of taking transformer oil samples and testing transformer oil samples with the Transport-X tool. The result of this research is that the transformer condition is still in normal condition, because the appearance of CO2 gas has almost crossed the condition limit,so other supporting methods are needed to find the cause of the gas. Key gasses indicate the presence of overheating of paper insulation, IEC Ratio diagnoses transformer failure caused by heat failure at temperatures of 300o-700o C, Duval's Triangel diagnoses transformer failure caused by temperatures over 700o and this method supports the previous analysis. With this method, overheating occurs at certain points (hotspots) in the internal transformer. Preventive maintenance is needed to conform to the standard of the transformer.A transformer is an electrical device to change the voltage from one level to a certain level with the same frequency that is generated from the generator. This transformer is used in a power plant to increase the voltage from the generator to be supplied to extra high voltage substations. By knowing the type and amount of gas in the transformer oil, it can be seen that the failure occurred. Preventive steps can be taken before the transformer is more severely damaged or a breakdown which will result in disrupted and detrimental electrical energy supply. The method used in this research is data collection methods used are observation, interviews and participation conducted at PT. Krakatau, Serang Banten. The method used to determine the failure of the transformer is the Dissolved Gas Analysis (DGA) method. The DGA test uses several methods to interpret the data, these methods are Total Dissolved Combustile Gas (TDCG), Key Gasses, Doernenburg Ratio, Roger's Ratio, IEC Ratio and Duval's Triangel. The method used in this research is direct observation of the process of taking transformer oil samples and testing transformer oil samples with the Transport-X tool. The result of this research is that the transformer condition is still in normal condition, because the appearance of CO2 gas has almost crossed the condition limit, so other supporting methods are needed to find the cause of the gas. Key gasses indicate the presence of overheating of paper insulation, IEC Ratio diagnoses transformer failure caused by heat failure at temperatures of 300o-700oC, Duval's Triangel diagnoses transformer failure caused by temperatures over 700o and this method supports the previous analysis. With this method, overheating occurs at certain points (hotspots) in the internal transformer. Preventive maintenance is needed to conform to the standard of the transformer.

Experimental Study of The Alternative Analysis of Cross-Section Variety of Half-Circle, Bowl and Isosceles Triangle to Generate Electricity: A Case Study of Pico Hydro-Pelton Turbines in ITATS Surabaya syamsuri syamsuri; Ahmad Anas Arifin; M Arif Hidayatulloh
VANOS Journal of Mechanical Engineering Education Vol 6, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v6i1.11139

One of the main urgencies of a developing country such as Indonesia is developing energy supply. Under the government regulation, Indonesia thrives the supply of electricity which mainly maintain by fossil fuels such as oil, gas and coal. This energy supply is limited from time to time. To alternate the condition, environment-friendly energy sources need to be developed. One such energy source is Pico hydro with the use of the concept of a hydroelectric power generator. As we know, this type of generator proven only useful in small, remote communities balanced with a small amount of electricity and considerably function with the Pelton turbines. This study focuses to maximize the valve opening of Pelton turbines to give a good distribution system to generate the electricity. The variety of valve opening of 18⁰, 36⁰, 54⁰, 72⁰ and 90⁰ are matched to the variety of cross-section of the half-circle, bowl and Isosceles Triangle. The result of this research is that the greater the valve opening the greater the efficiency system. Type of bowl blade results in greater efficiency of the system than the semicircular and isosceles triangular blade.

Analysis of Corrosion Rate of Carbon Steel Galvanized by Weight Loss Method to Thickness and Micro Structure of Steel Mohamad Agus Fhaizal
VANOS Journal of Mechanical Engineering Education Vol 6, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v6i1.10913

This study aims to determine the effect of hot dip galvanizing on steel with different carbon content on mechanical properties of steel. The research method used in this research is an experimental method,The method used was that the metal was coated with hot dip galvanizing media using zinc. From the hardness test results, SAE 1085 produced the highest average of hardness 95.1 HRB. The results of the thickness test showed that the highest AISI 1020 was 131.8 μm. The results of the corrosion rate test showed that the highest corrosion rate is AISI 1020 was 0.36385 mmpy. The microstructure test results showed SAE 1085 has a smaller grain size. Zn layer which is not too thick due to lack of diffusion and movement of Zn atoms due to high carbon content which has a close layer distance and small grains. So that the corrosion rate that occurs is lower than steel which has a low carbon content.

The Effect of Zeolite Catalysis Size on Biodiesel Characteristics of Bio-Oil from Tuna Waste Imron Rosyadi; Haryadi Haryadi; Ni Ketut Caturwati; Syahrul Ivandy
VANOS Journal of Mechanical Engineering Education Vol 6, No 1 (2021)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v6i1.9269

Indonesia is a country with the third largest tuna production in the world. Fish oil as a fishery product processing waste is a potential material for making biodiesel because it has a high fat content. In this research, biodiesel was made from bio-oil from tuna waste through esterification and transesterification processes at 60°C, stirring speed 360 rpm with a reaction time of 2 hours. The purpose of this study was to determine the levels of Free Fatty Acid (FFA) contained in bio-oil from tuna waste and to determine the effect of the size of the natural zeolite catalyst in the transesterification process on the characteristics of the biodiesel produced. The variables used were the size of the zeolite catalyst 10 - 20, 30 - 40, 50 - 60, 70 - 80, 100 - 120 mesh. From the research results, it can be concluded that the smaller the zeolite catalyst size, the resulting biodiesel is closer to the biodiesel standard and the size of 100-120 mesh which is very close to the SNI 7182: 2015 biodiesel standard with a density value of 849.6 kg/m3, kinematic viscosity 3,413 cSt, moisture content. 0%, acid number 1.10 mg.KOH /gr, flash point 75 ° C, calorific value 8.240 Cal/gr.

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Abstract

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Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kab. serang,

Banten

INDONESIA