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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Turbo : Jurnal Program Studi Teknik Mesin Jurnal Teknik Mesin Indonesia
Novri Tanti, Novri
Universitas Lampung
Aerospace Engineering Automotive Engineering Control & Systems Engineering Earth & Planetary Sciences Industrial & Manufacturing Engineering Mechanical Engineering

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Rancang ulang alat pengering kakao tipe drawer dryer pada usaha mandiri kakao Desa Wiyono Kabupaten Pesawaran Risano, Yudi Eka; Tanti, Novri; Paska W, Andreas
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 1 (2020): Jurnal TURBO
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (758.789 KB) | DOI: 10.24127/trb.v9i1.1160

Abstract

Cocoa is a commodity that has a high economic value. According to the 2013 FAO, Indonesia ranks third as the largest cocoa producing country in the world and accounts for 17% of world cocoa production with an area of 1,774,303.97 ha of plantations. In Lampung province, many cocoa farmers process their own garden products into dry cocoa using conventional processes and the results are judged to be less efficient so that the quality of the dried cocoa beans produced is not good. In the conventional drying process requires firewood up to 1 cubic, drying time is 10 hours, and cocoa must be stirred every 30 minutes. This study aims to redesign conventional cocoa dryers in one of Wiyono village's independent businesses to be better in terms of heat distribution, fuel consumption, and drying time. In this research, MATLAB computation and simulation software are used to simplify the design process. The design that was carried out only modified the existing dryer without changing the total dryer system by adding a heating pipe into the drying chamber to produce better quality cocoa. From the results of simulations that have been carried out on the longitudinal axis alignment pipe design, the results of heat distribution are more evenly distributed than that of the widest axis directional pipeline arrangement. With the design of the longitudinal axis arrangement of the pipe, an estimated drying time of 7.9 hours is obtained, fuel consumption is between 0.15-0.28 m3 firewood, and there is no need for stirring during the drying process.Keywords: Cocoa, redesign, dryer, MATLAB.
The TLP 2-DOF as an alternative model for extreme wave application Akmal, Jamiatul; Lubis, Asnawi; Tanti, Novri; Nuryanto, Nuryanto; Murti, Adam Wisnu
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 18, No 2 (2021): June
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v18i2.37187

Abstract

Tension Leg Platform (TLP) is an offshore platform structure used for deep-sea oil and gas exploration. The main structure of the TLP consists of a deck, pontoon, mooring system, and foundation. TLP operates in a balance of buoyancy, structural weight, and mooring tension. The problem is the construction of TLP in the deep sea, where sometimes extreme waves appear could damage the TLP structure. This paper proposes a new model of TLP that is more stable to extreme waves. The method is to separate the mass of the deck and the mass of the pontoon into two flexible parts, which are connected by a cantilever spring system. Thus the TLP motion becomes two degrees of freedom (TLP 2-DOF). Using the dynamic vibration absorber (DVA) method, the ratio of the deck mass, pontoon mass, and spring stiffness are adjusted so that the primary mass movement is minimal. Furthermore, the ratio of the amplitude of the deck movement as the primary mass to the wave amplitude is analyzed, which is known as the operator response amplitude (RAO). The results showed that the TLP 2-DOF model was more stable. As an illustration, at resonance conditions, this model can reduce RAO to about 67%.
Rancang Bangun Sistem Pengunci Pintu Rumah Menggunakan Remote nRF24l01+ Berbasis Mikrokontroler Suudi, Ahmad; Saputra, Anggi; Martinus, Martinus; Tanti, Novri; Lubis, Asnawi; Riszal, Akhmad
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2601

Abstract

Home door security currently still uses a manual system using conventional door locks.  The disadvantages of conventional house door locks include that the home owner must ensure that the house key is not owned by a stranger which causes the key to be easily duplicated, as well as the number of house break-ins that cause the security of the house door to be very insecure.  To overcome the problems that occur regarding the security of the house door, the authors created a microcontroller-based door lock system using the nRF24L01+ remote as access control for opening and closing door locks. This door lock system uses 3 microcontrollers, including NodeMCU ESP8266 as a remote. Arduino Uno as the door lock system control unit, as well as the additional NodeMCU ESP8266 microcontroller as a data logging unit.  The control unit is tasked with making decisions based on commands sent by the remote via radio frequency communication from the nRF24L01+ module.  The command sent by the remote is in the form of opening and closing the door lock which comes from the input button on the remote.  It also provides additional features in the form of data logging by providing input using a limit switch attached to the door. This research got the results, namely the success of the system that is able to respond in less than one second.  The fastest response time gets a value of 0.14 seconds, then the longest response speed gets a value of 0.565 seconds, and the stable response speed gets a value of 0.188 seconds
Optimization of Hammer-Disc Mill Parameters During Producing Gluco-mannan Flour Using Taguchi Method Ibrahim, Gusri Akhyar; Burhanuddin, Yanuar; Hamni, Arinal; Tanti, Novri; Wibowo, Muhammad Pandu; Valiandra, Tito
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.758

Abstract

Porang tubers contain glucomannan, which has health benefits for the human body. However, glucomannan also contains calcium oxalate, which is toxic. A Hammer-Disc mill (HDM) machine was used to separate glucomannan and calcium oxalate, categorized as a mechanical process. This study aims to optimize the parameters of the Hammer-Disc Mill machine for producing glucomannan flour by using the Taguchi Method. The selected parameters are the mass of the porang chip, motor rotation speed, and the distance of the hammer blades. The Taguchi Method was used to design an experiment using the Orthogonal Array L9 (3 factors, 3 levels). In this study, statistical analysis was carried out using Analysis of Variance (ANOVA) to determine each parameter's effect on glucomannan production. The glucomannan granules were taken using a screener of 60-80 mesh. The results show that the input mass parameter of porang chips significantly affects the glucomannan produced, which, F calculating 10,91 was more than f Table 5,41. The contribution of mass input of porang chips in percentage is 85.36%. Based on the results of the best response, the optimal condition for the production of glucomannan flour is to use a mass of 1 kg of porang chip input (level 3), motor rotation speed of 3000 rpm (level 3), and hammer spacing of 1 cm (level 3). By optimizing this parameter it is expected to increase the yield of glucomannan produced by the Hammer-Disc Mill machine.
Co-Authors A.Yudi Eka Risano Ahmad Suudi anggi saputra Arinal Hamni Asnawi Lubis Gusri Akhyar Ibrahim Jamiatul Akmal Martinus, Martinus Murti, Adam Wisnu Nuryanto Nuryanto Paska W, Andreas Riszal, Akhmad Valiandra, Tito Wibowo, Muhammad Pandu Yanuar Burhanuddin