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Teknomekanik

teknomekanik
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Published by Universitas Negeri Padang

ISSN : 26219980 EISSN : 26218720 DOI : 10.24036/tm.

Core Subject : Engineering,

Mechanical Engineering

Teknomekanik is an international journal that publishes peer-reviewed research in engineering fields (miscellaneous) to the world community. Paper written collaboratively by researchers from various countries is encouraged. It aims to promote academic exchange and increase collaboration among scientists, engineers and researchers to support sustainable development goals.

Arjuna Subject : Teknik (semua kategori) - Teknik Mesin

Articles 70 Documents

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Characteristics Particleboard Made From Areca Fiber With Tapioca and Gambier Adhesive Hendri Nurdin; Waskito Waskito; Batu Mahadi Siregar
Teknomekanik Vol 4 No 1 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

The development of engineering materials has increased its use in various fields. The engineering material is particleboard made from areca fiber which is processed with technology. Areca fiber as waste has the potential to be used as an engineering material. The purpose of this study was to obtain the characteristics of the particleboard following the quality standards of JIS A 5908-2003 and SNI 03-2105-2006. The process of making particleboard by mixing particles of areca fiber and adhesive then compacting it. The adhesives used are tapioca and gambier. The concentration of areca fiber particles is 90%, 80%, 70%, and 60%. From this research, it was found that the characteristics of the particleboard using tapioca adhesive according to the quality standard and the gambier adhesive particle board did not meet the standard quality. This particleboard can be used as a raw material for making interior furniture instead of wood.

The Optimization of Building Energy Consumption in Universitas Negeri Padang Using Building Energy Simulation Program Andre Kurniawan; Nanang Qosim; Remon Lapisa; Zainal Abadi; Jasman Jasman
Teknomekanik Vol 4 No 1 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

Energy consumption of a building is one of the biggest sources of energy use today. Green Building Comitte Indonesia (GBCI) has launched a concept of energy consumption saving in a nationally standard building. Audit Building energy audit is the way to know how actual building energy consumption is and find alternative solution to decrease energy consumption in order to fulfill the energy saving building criteria. Two types of HVAC systems will be run in the EnergyPlus simulation, split AC and central AC. The previous research proved that central AC is better than split AC system for energy saving in the building with 20 floors. The simulation results show that by using a certain energy system, a more efficient energy system will be achieved and can still maintain the comfort of the room at a temperature of 24 °C and relative humidity according to the Green Building Indonesia standard reference.

Complimentary Split Ring Resonator (CSRR) As A Viscometer For Engine Oils Tze Ching Ong; Andy anak Buja; Alexandria Anak George Empam; See Khee Yee; Chee Kiong Sia; Pauline Ong
Teknomekanik Vol 4 No 1 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

A viscometer is a tool used to determine the strength of a fluid to shear or tensile stress. Meanwhile, engine oils are used to reduce friction and wear during operation and often deteriorate by the dynamic process with the combined effects of working conditions, contaminations and wear conditions. Therefore, the precise characterization of viscosity is important in the analysis of numerous engineering situations that consume engine oils that associate the functionality or performance of vehicles and machinery. This work aims to investigate the Complimentary Split Ring Resonator (CSRR) as a viscometer for engine oils. The antenna using radiation path such as CSRR is commonly used to measure the dielectric property of substances. Hence, this approach is applied to identify the dielectric properties of engine oils and establish the correlation between viscosity and dielectric properties. Eight engine oils from Shell were tested based on their margins in the terms of kinematic viscosity. Each oil was tested and repeated three times before the mean values were determined along with the frequency of 1-9GHz. The findings show no convincing and solid correlation between the two variables due to the small dielectric constant variation of engine oil with different viscosity. However, future works using current resonator will be applied in other applications associated with different material properties to build a predictive model. In addition, future work can consider sweeping in low frequency that might show positive results.

Redesign Shovel To Be More Efficient, Convenient and Safe Muhammad Iqbal Al Hakim bin Azmee; Alyssa Mulyani binti Mohd Mulkan; Hasrul bin Halimoon; Alwani binti Adnan
Teknomekanik Vol 4 No 1 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

Shovel, hoe, fork hoe, and hole digger are commonly used in various material handling work manually. So far, only a few studies have been done for special ergonomically designed tool that will serve the purposes of the shovel, hoe, fork hoe, and hole digger. This research examined the efficiency of specifically combined tools shovel, hoe, fork hoe, and hole digger named as multifunction shovel for digging, lifting, and moving bulk materials such as soil, coal, gravel and sand. This project was built to minimize physical workload, reduce the time taken to perform this task, and mitigate health and safety risks. There were 20 respondents involved in this study and they were required to test the project before completing observation checklists and questionnaires. The findings revealed that the students had strong approval on each function and feature of the project. There were a few recommendations on how the project could be improved to be safer and more efficient.

Analysis of Tensile Strength of Citronella (Cymbopogon Nardus) Fiber Reinforced Composite Materials Julio Lukmanul Ardi; Hendri Nurdin; Andril Arafat; Sri Rizki Putri Primandani
Teknomekanik Vol 4 No 2 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

The use of synthetic fibers in composite materials has a negative impact on the environment. One way to reduce this impact is to replace synthetic fibers with natural fibers. A natural fiber that has the potential as a mixed material in the manufacture of composite materials is citronella (Cymbopogon nardus) fiber. This study aims to determine the effect of volume fractions 40%, 50%, 60%, and 70% of citronella fiber with polyester resin matrix BQTN 157 on tensile strength. The process of making composites used the hand lay-up method. The specimen was formed according to the ASTM D3039 standard and the tensile strength of the specimen was tested by using a Universal Testing Machine (UTM). From the results of the study, the maximum tensile strength was found in the fiber volume fraction 70% of 77.35 MPa, the strain is 6.57%, and the modulus of elasticity is 1.177 GPa. This study indicates that fiber volume fraction affects the tensile strength of composite materials. Hence, the manufacture of composite materials which have good strength is influenced by many things such as raw materials, matrices, mixture composition, and methods.

Ball-Mill Assisted Green One-Pot Synthesis of ZnO/Graphene Nanocomposite for Selective Electrochemical Sensing of aquatic pollutant 4-nitrophenol Kavya P; Soorya V S; Binitha N Narayanan
Teknomekanik Vol 4 No 2 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

ZnO, having good transparency, high electron mobility and lower electrical noise, is an excellent material for electrochemical studies. Due to its high surface area and electrical conductivity, graphene is well suitable for the good dispersion of metal oxides for electronic/electrochemical applications. Graphene prevents particle agglomeration, whereas the addition of metal oxide prevents layer restacking in graphene. The bulk preparation of graphene via cost-effective and green methods are preferred. The aromatic conjugated π-network along the whole surface is not attained in large scale graphite oxide assisted production due to the defects and functional groups introduced during the hazardous synthetic procedure. Here, less defective graphene is synthesised via ball milling of graphite using metal oxalate as an exfoliating agent for the first time. Calcination of metal oxalate inserted graphite leads to the enormous evolution of gases thereby sliding the graphitic layers, leading to the formation of graphene sheets decorated with ZnO spherical nanoparticles’ bunches. The layer exfoliation and metal oxide incorporation are achieved here via a one-pot synthesis strategy. The use of ZnO/graphene in the selective sensing of 4-nitrophenol is investigated using cyclic voltammetric measurements in the presence of interfering compounds such as glucose, uric acid, ascorbic acid and H2O2.

Optimization of CNC Turning Parameters Using Taguchi Method Rifelino Rifelino; Bulkia Rahim; Eko Indrawan
Teknomekanik Vol 4 No 1 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

The surface roughness quality of machining product plays important role when it contacted with other machine components. That quality depends on several parameters setting, such as material, cutting tool, cutting condition and operator skill. The aim of this study is to obtain the optimum setting of turning parameters by using Taguchi method. Three control factors: cutting speed, depth of cut, and feeding at three different levels are selected. A series CNC turning process on AISI 1045 material were performed using L9 (3)3 orthogonal array with cutting fluid. Insert carbide cutting tool is used in the experiment. In order to reveal the optimum machining parameter, smaller the better is quality characteristic selected for surface roughness examination of workpiece. Analysis of experiment results revealed that higher cutting speed, low feed, low depth of cut respectively, provides fine surface quality of machined workpiece. Moreover, feed f parameter was found most influence to the surface rougness quality with 53.73% contribution, cutting speed v provides 23.28% contribution, and depth of cut a provides 17.87% contribution. Confirmation experiment shows that level 3 of cutting speed, level 2 of cutting depth, and level 1 of feed deliver smoothest machined surface of Ra 0,46 µm.

Quantitative Risk-Based Inspection on Gas Riser Pipelines at Offshore Facilities Mhd. Ibkar Yusran Asfar; Johny Wahyuadi Soedarsono; Arie Wijaya; Taufik Aditiyawarman; Dony Soelistiyono; Romal Ramadhan
Teknomekanik Vol 4 No 2 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

Numerous pipeline failures have occurred due to the drastic increase in oil and gas product distribution pipelines over the last three decades. Corrosion is a significant factor in the failure of offshore gas pipelines. It is necessary to maintain the integrity of the offshore transmission system, one of which is the riser, for the product to be adequately distributed. The purpose of this study is to ensure the riser's reliability by conducting a risk assessment of the probability and consequences of equipment failure, mitigating the impact of failure risk, and developing a more optimal inspection plan. The API 5L Grade X60 gas riser pipe is the subject of this study. The quantitative Risk-Based Inspection (RBI) technique was used in 2016 following the API 581 standard. This quantitative approach is founded on a numerical value model constructed using validated operational data and inspection results. The risk assessment indicates that the gas riser pipelines will have a high-risk level (5D) for the splash zone segment and a medium-risk level (2D) for the above-and below-water segments. The recommended inspection plan for the gas riser pipeline is one year after the risk-based inspection assessment.

Performance Comparison of Ground Source Heat Pump (GSHP) against Air Source Heat Pump (ASHP) for Domestic Applications: A case study in Perth, Australia Tine Aprianti; Evan Tan; Chan Diu; Ben Sprivulis; Greg Ryan; Kandadai Srinivasan; Hui Tong Chua
Teknomekanik Vol 4 No 2 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

The goal of this research is to evaluate the efficacy and practicality of installing a ground source heat pump (GSHP) with an air source heat pump (ASHP) in a residential setting. The results of this comparison were obtained by monitoring each of the systems in two almost identical residences in Perth, Western Australia. There is an open-loop groundwater system in the previous home. Each residence has one family whose air conditioning system has its own set of operational needs. The cooling capacity supplied and coefficient of performance (COP) as a function of seasonal changes in ambient temperatures were determined using data gathered from both residences over a two-year period. For both heating and cooling, the GSHP system COP was found to be greater than that of the ASHP system. Furthermore, these two performance measures were independent of ambient circumstances in the former, but they exhibit a noticeable ambient dependent trend in the latter. The GSHP had an average COP of 4.0 for heating, regardless of external conditions, while the ASHP COP ranged from 2.0 to 3.0. Conversely, the GSHP had an average COP of 3.2 for cooling, whereas the ASHP COP ranged from 1.4 to 2.9. It is found that GSHPs result in significant operational cost reductions and a significant decrease in greenhouse gas emissions when a borewell is part of a home.

Development of Wireless Piezofilm Sensor for Monitoring Vehicle Suspension System Muhamamad Zuhairy Zulkifli; Zaihasrah Masron; Saltanat A. Omarova
Teknomekanik Vol 4 No 2 (2021): Teknomekanik
Publisher : Universitas Negeri Padang

The use of piezoelectric sensors in the data acquisition of vibration signal for monitoring systems on vehicles is a practical way to determine the performance of vehicle suspension systems (VSS). However, the transmission of vibration signal data through piezoelectric sensors still relies on conventional techniques, such as wires, which can cause problems in areas with limited space and pose a safety risk for moving vehicles. This study developed a wireless piezofilm sensor-based data acquisition device to monitor VSS using an Arduino microcontroller as a signal processor and a Bluetooth HC-05 module as a wireless communication link with a control terminal. The data acquisition process is carried out by measuring the electrical signal resulting from the vibration of the piezofilm sensor caused by the dynamic motion of the VSS operation. The signal data acquired from the car's body and lower arm was analyzed using the Fast Fourier Transform (FFT) analytical method for comparison. The results of the analysis show that the vibration increases with the increase of the car speed. It found that the vibration at the lower arm of the car is higher than the body part. It can conclude that the developed wireless piezofilm device is effective and capable of performing VSS monitoring.

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Rahmat Azis Nabawi

Contact Email raazna@ft.unp.ac.id

Phone +6281277328670

Journal Mail Official Syahril@ft.unp.ac.id

Editorial Address Jl. Prof. Dr. Hamka Kampus UNP Air Tawar

Location Kota padang, Sumatera barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Rahmat Azis Nabawi

Contact Email
raazna@ft.unp.ac.id

Phone
+6281277328670

Journal Mail Official
Syahril@ft.unp.ac.id

Editorial Address
Jl. Prof. Dr. Hamka Kampus UNP Air Tawar

Location
Kota padang,

Sumatera barat

INDONESIA