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All Journal International Journal of Science and Engineering (IJSE) TEKNIK Rotasi Sainteknol : Jurnal Sains dan Teknologi Jurnal Teknologi Rekayasa Mesin Sinergi Prosiding Semnastek DINAMIKA Jurnal Ilmiah Teknik Mesin JTT (Jurnal Teknologi Terpadu) Teknika: Engineering and Sains Journal JRST (Jurnal Riset Sains dan Teknologi) RESISTOR (Elektronika Kendali Telekomunikasi Tenaga Listrik Komputer) Prosiding Semhavok Jurnal Pengabdian Masyarakat Teknik Journal of Applied Sciences and Advanced Technology BASKARA: Journal of Business and Entrepreneurship Indonesian Journal of Computing, Engineering, and Design ABDI MOESTOPO: Jurnal Pengabdian pada Masyarakat Mechanical Engineering for Society and Industry Automotive Experiences Jurnal Teknik Mesin Mechanical Xplore Borobudur Engineering Review Aceh International Journal of Science and Technology
Anwar Ilmar Ramadhan
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Jakarta, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Efficiency Analysis for Plate Type Heat Exchangers Using Nanofluids in the Primary Cooling System of the TRIGA 2000 Nuclear Reactor with Computational Fluid Dynamics Code Yusuf, Yusuf; Ramadhan, Anwar Ilmar; Umar, Efrizon; Fitriana, Rian; Firmansyah, Firmansyah; Azmi, Wan Hamzah
Journal of Applied Sciences and Advanced Technology Vol. 6 No. 3 (2024): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.6.3.117-128

Abstract

The TRIGA reactor is equipped with a primary cooling system that transfers heat from the reactor tank water to the secondary cooling system. Heat transfer in this system occurs mainly in plate-type heat exchangers located in the reactor building, using forced convection with the help of primary and secondary pumps. This research aims to evaluate the effectiveness, efficiency, heat transfer rate, and temperature difference. The analysis was carried out through CFD (Computational Fluid Dynamics) modeling using ANSYS Spaceclaim for geometric design and ANSYS FLUENT for simulation. Simulations using ZrO2-Water Nanofluid with volume concentrations of 0.2%, 0.6%, and 1% and variations in mass flow rates of 15 kg/s, 20 kg/s, and 25 kg/s. The simulation results show the distribution of temperature, pressure and fluid velocity. The theoretical analysis of the plate type heat exchanger shows that the use of ZrO2 with a concentration of 1% has the highest efficiency, which is 3.39% at a mass flow rate of 25 kg/s, and an efficiency of 64.82% at a mass flow rate. as much as 15 kg/s.
PENGEMBANGAN ALAT CETAKAN KUE AKAR KELAPA OTOMATIS UNTUK PELAKU USAHA MIKRO KECIL DAN MENENGAH (UMKM) Dyota, Arya Smara; Kamila, Fatima Tasya; Saptaji, Kushendarsyah; Fikri, Muhamad Rausyan; Hadisujoto, Ignatius Budi Sutanto; Setiawan, Iwan; Ramadhan, Anwar Ilmar
Jurnal Pengabdian Masyarakat Teknik Vol 5, No 2 (2023): Jurnal Pengabdian Masyarakat Teknik (JPMT)
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jpmt.5.2.59-64

Abstract

Kue akar kelapa merupakan kue kering atau camilan khas masyarakat suku Betawi, Indonesia yang berbentuk seperti akar kelapa. Sebagai salah satu makanan tradisional, tentu saja kue akar kelapa ini perlu untuk dilestarikan. Namun dalam proses pembuatannya, masih banyak dilakukan dengan cara manual yang membutuhkan waktu dan tenaga yang cukup banyak, sehingga dibutuhkan alat otomatis untuk menghemat kedua hal tersebut. Oleh karena itu, civitas akademi dari Fakultas Teknik dan Teknologi Universitas Sampoerna mengadakan kegiatan pengabdian kepada masyarakat untuk membantu para pengusaha kue akar kelapa dengan membuat alat cetakan kue akar kelapa otomatis. Kegiatan ini juga melibatkan mahasiswa dari jurusan teknik mesin Universitas Sampoerna dengan mengimplimentasikan sebagai tugas proyek pada mata kuliah proses manufaktur dengan bimbingan dosen pengajar matakuliah tersebut. Kegiatan ini dilakukan terutama untuk membantu pengusaha kecil menengah yang tergabung dalam Persatuan Usaha Kecil dan Menengah Indonesia (Perumkmindo) Jakarta Selatan. Proses kegiatan dimulai dengan melakukan riset, mendesain alat, membuat prototipe alat, hingga uji coba dan demo kepada perwakilan Perumkmindo. Dari hasil ujicoba, salah satu alat yang dibuat oleh mahasiswa dihasilkan pada kegiatan pengabdian masyarakat ini dinilai layak dari segi teknis dan ekonomi. Selain untuk melestarikan makanan tradisional, alat ini diharapkan dapat meningkatkan produktivitas penjual kue akar kelapa dan meningkatkan pendapatan. 
Investigation of Thermal Conductivity and Dynamics Viscosity of Green Nanofluids (ZrO2-SiO2) Ramadhan, Anwar Ilmar; Saptaji, Kushendarsyah; Hendrawati, Tri Yuni; Sari, Alvika Meta; Umar, Efrizon; Aziz, Azmairit; Semendo, Rifqi Putra; Setiawan, Hanif Rama Yuda; Firmansyah, Firmansyah
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.301-312

Abstract

In recent years, research has been directed towards improving the thermophysical properties of single-component nanofluids. Therefore, hybrid or composite nanofluids are developed to improve heat transfer performance. The thermophysical properties of ZrO2-SiO2 nanoparticles suspended in a mixture of water (W) and ethylene glycol (EG) with vol 60:40 or Green Nanofluids for various volume concentrations were investigated. Experiments were performed for volume concentrations of 0.1, 0.2, and 0.3% of green nanofluids at 50, 60, 70, and 80°C. Measurements of thermal conductivity and dynamic viscosity are performed at temperatures ranging from 50-80°C. The highest thermal conductivity of the green nanofluids is obtained at a concentration of 0.3%, and the maximum increase is up to 37.5% higher than the base fluid (EG/W). Meanwhile, evidence from the dynamic viscosity of green nanofluids is affected by concentration and temperature. Furthermore, the green nanofluids behave as a Newtonian fluid in a volume concentration of 0.1-0.3%. In conclusion, the combination of increased thermal conductivity and dynamic viscosity at a concentration of 0.3% has optimal conditions, which has more advantages for heat transfer than at other concentrations.
Analysis of Variances in Flame Length of Time For Maggot BSF Oil with Several Types of Oil Rimantho, Dino; Hidayah, Nur Yulianti; Pratomo, Vector Anggit; Ramadhan, Anwar Ilmar
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.161-168

Abstract

Three problems are being faced simultaneously by Earth today: water (wastewater), energy, and food. However, considering the finite amount of land and the depletion of fossil fuels, this expansion is incompatible with the replenishment of natural resources in terms of both quantity and quality. Furthermore, another sustainable energy source that has gained international attention is biodiesel. However, research on the relative flash durations of Maggot BSFL oil has not been conducted. Consequently, this article will compare the flame times of many other types of oil with Maggot BSFL oil. This study uses a variety of oils as experimental subjects, including BSF maggot oil, used cooking oil, Pertamina Dex, and a combination of Pertamina Dex and BSF maggot oil. Analysis of the variations in flame time for each type of oil is done using statistical analysis. According to this analysis, the mixture of Maggot BSF oil and Pertamina Dex had the maximum flame, lasting between 16.31 and 16.44 minutes. Additionally, this study offers data on the notable variations in flame length for each type of oil, including used cooking oil, Pertamina Dex, Maggot BSF oil, and a combination of both. When creating biodiesel from Maggot BSF oil, the experiment's findings can serve as a starting point. in order for biodiesel made from Maggot BSF oil to provide Indonesia with a fresh option for the development of sustainable energy.
Analysis Characteristics Hybrid Coolant Nanoparticles As a Cooling Media for Genset Generator Rantawi, Azhar Basyir; Saputra, Hendra; Siregar, Ahdiat Leksi; Rahardja, Istianto Budhi; Susanto, Edy; Ramadhan, Anwar Ilmar
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.259-266

Abstract

Industry nanotechnology- based is a very significant new modern era, where throughout field develop and use it. In the world of technology as primary needs at the moment This for society, has Lots use results its products. Cooling system as balancers in the industrial world including generators require gensets research and development For cool diesel generator engine . Hybrid coolant has composition 30% material  natural and 70% distilled water. The addition nanoparticles to in hybrid coolant of 1% (TiO2-SiO2-Al2O3 ). The test was carried out is temperature point education, pH value, density. Analysis results The characteristics of hybrid coolant are point boiling 99°C, pH value between 5.79-6.06, as well mark density of 1,012-1,024.
Effect of Mass Composition on Nano Zircon Synthesize from Local Zircon Sand Using Soda-Precipitation-Calcination-Caustic Fusion Method Sari, Alvika Meta; Ramadhan, Anwar Ilmar; Rahardja, Istianto Budhi; Umar, Efrizon; Yudistirani, Sri Anastasia; Faisal, Akmal Imam; Fikriyansyah, Fikriyansyah; Azmi, Wan Hamzah
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.169-178

Abstract

Zircon sand has the major component of ZrO2 with impurities SiO2, Fe2O2, and TiO2. Zircon sand can be synthesized using various methods, such as caustic fusion method. This research purposed to determine the effect of the mass composition of NaOH on fusion process of zircon sand and to find the optimal mass ration of NaOH on yield and characteristics of nano zircon produced. This research was conducted using caustic fusion and precipitation process to obtain the mass ration of NaOH in best zircon sand fusion (melting) process. The nano zircon obtained was analyzed its size using SEM and chemical composition using FTIR. The result show that the correlation between NaOH ration and yield following the equation y = 0.42x2-2.532x+3.908 and R2 =0.9696. It showed that the higher NaOH composition will reduce the size of nano zircon. The optimum NaOH ratio is 1 : 3.6 with size od 41.983 nm and yield 1.84% which in white, odorless and powder texture. The FTIR spectrum showed the presence of the -Zr-O2 functional groups at wave numbers 600 – 700 cm-1.
Improvement of ankle foot orthotics fabrication using 3D printing method Saptaji, Kushendarsyah; Manasikana, Dinda Arina; Juniasih, Octarina Adiati; Ramadhani, Mochammad Rafli; Oktaviandri, Muchamad; Ramadhan, Anwar Ilmar; Asmara, Yuli Panca
SINERGI Vol 28, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.3.015

Abstract

Orthotics are the body support devices used for correction, immobilization, fixation, and prevention of paralysis. The greatest number of orthotics utilized by people suffering from plantarflexion and dorsiflexion disability, especially in Indonesia, is ankle foot orthotic (AFO). However, the duration associated with fabricating AFO through conventional methods is considered time-consuming. This paper aims to fabricate ankle foot orthotics (AFO) using innovative combinations of 3D scanning and 3D printing. The method begins with 3D scanning of the patient’s lower limb using photogrammetry (3DF Zephyr). The design is generated and adjusted, afterwards, the orthotic prototype is produced by fused deposition modeling (FDM) 3D printing using polypropylene (PP) material. This choice is attributed to the material's advantages, such as being lightweight, rigid, durable, and cost-effective. The 3D mesh model scanned using 3DF Zephyr shows good quality and more precise results. In addition, the prototype produced using 3D printing was tested by walking based on normal gait analysis’s angle of foot and calf measurement, which shows a maximum range of motion (ROM) of 16.1˚. The proposed methods of fabricating orthotic prototypes can successfully reduce the processing time by approximately 70% compared to the conventional method. 
Experimental investigation on stability and thermal conductivity of SiO2 nanoparticles as green nanofluids for application thermal system Ramadhan, Anwar Ilmar; Umar, Efrizon; Hendrawati, Tri Yuni; Sari, Alvika Meta; Rahardja, Istianto Budhi; Aziz, Azmairit; Firmansyah, Firmansyah; Yulianto, Sulis; Azmi, Wan Hamzah
SINERGI Vol 28, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.3.018

Abstract

In the last few years, much research has focused on the stability and improvement of the thermo-physical properties of single-component nanofluids. Some studies have not made many improvements to the stability and thermophysical properties of various types of green nanofluids from several variations of nanoparticles. Green nanofluids must be developed to improve heat transfer performance from their stability and thermal conductivity factors. Stability and thermal conductivity of Nano-silicate suspended in a base mixture of water /ethylene glycol with the ratio of 60:40, different volume concentrations were investigated. The experiments carried out were the stability of the green nanofluids investigated for volume concentrations of 0.1~0.3% and temperature conditions from 30 to 70°C for thermal conductivity measurement using TEMPOS Thermal Properties Analyzer. The experimental results showed that the stability analysis of the green nanofluids prepared by the UV-Vis method was stable up to 30 days after preparation with a sonication time of 1 hour with a ratio of 70-80%. The evaluation of the zeta potential for green nanofluids obtained a value of 33.57 mV with a moderate stability classification. The highest thermal conductivity for the green nanofluids was obtained at 0.3%, and the maximum increase was 17% higher than that of the base liquid (W/EG). Green nanofluids with a concentration of 0.1% gave the lowest effective thermal conductivity of 1.09 time at 70°C.
EFFECT OF ANNEALING ON THE MECHANICAL PROPERTIES OF FUSED DEPOSITION MODELING 3D PRINTED PLA Natayu, Amartya; Muhammad, Azka Aulia; Tumada, Azhari; Saptaji, Kushendarsyah; Trisnadewi, Titin; Triawan, Farid; Ramadhan, Anwar Ilmar; Azhari, Azmir
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1625

Abstract

Additive manufacturing or 3D printing is a rapidly moving fabrication technology with many usages in various fields. One of the methods used in 3D printing is Fused Deposition Modeling (FDM), where polylactic acid (PLA) filament is melted and deposited layer by layer to form the desired parts. This study explored the impact of annealing on the mechanical properties of 3D printed PLA specimens. Tensile specimens were produced using FDM following ASTM D638 standards. The specimens were annealed at 95°C and 145°C for 30, 60, and 120 minutes. Two untreated specimens served as benchmarks. Tensile tests were conducted on all specimens to evaluate their mechanical properties. The most optimal result was achieved with annealing at 95°C for 30 minutes, producing Young’s modulus of 3.3 GPA and the highest ultimate tensile strength (UTS) of 38.9 MPa. Other parameters resulted in lower properties compared to the untreated specimens.
Heat Transfer Analysis and Friction Factor of Ternary Nanofluids with Twisted Tape Inserts Ramadhan, Anwar Ilmar; Azmi, Wan Hamzah; Lasman, As Natio; Umar, Efrizon; Sharma, Korada Viswanatha
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 6 No. 2 (2024): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v6i2.473

Abstract

This study investigates the heat transfer efficiency and friction factor of ternary nanofluids (Al₂O₃-TiO₂-SiO₂) in a simple tube equipped with a twisted tape. Ternary nanofluids, prepared using a volume-based composition ratio of 20:16:64, were tested at various volume concentrations ranging from 0.5% to 3.0%. Forced convection heat transfer experiments were conducted under varying Reynolds numbers (2,300 to 12,000) and a bulk temperature of 70 °C. The results indicate that the maximum viscosity occurs at a volume concentration of 3.0%. The highest increase in heat transfer for ternary nanofluids in a simple tube with twisted tape (H/D = 2.0) was achieved at a volume concentration of 3.0%, reaching 225.35%. Compared to a plain tube, the average thermal performance factor (TPF) of the twisted tape was significantly improved, with a further increase observed when the volume concentration rose from 2.73% to 3.22%.    
Co-Authors Abduh Al Afghani Abdul Kadir Abrori, Muhammad Reza Achmad Nuril Fajar Adawiyah, Sa'diyah El Ade Muslimat Aditya Firmanto Agung Julianto Agung Siswahyu Ahdiat Leksi Siregar Ahmad Fauzi Ahmad Yakub Ahmad Yakub, Ahmad Akmal Imam Faisal Alfa Taufan Latif Alvika Meta Sari Alvika Meta Sari Aminullah, A.R.M. Amri Abdulah Anggoro Septilarso Annisa Mulia Rani Annisa Mulia Rani Aryadi Suwono As Natio Lasman As Natio Lasman Azhari, Azmir Azmairit Aziz Azmi, W.H. Azmi, Wan Hamzah Bambang Setiawan Bambang Setiawan Boy Setiawan Choirul Anwar Dalil Sumiyarsono, Dalil Daruki Daruki Dede Erland Ramadhan Deni Almanda Deni Almanda Deni Almanda Dermawan, Erwin Dharu Dewi Dhian Trisnadi Setyawan Diah Safitri Ningrum Dicky Dimyati Dino Rimantho Djoko Hadi Prajitno Djoko W Karmiadji Djoko W Karmiadji Dodi Mulyadi Dyota, Arya Smara edy susanto Efrizon Umar Efrizon Umar Efrizon Umar Efrizon Umar Efrizon Umar Efrizon Umar Efrizon Umar Eka Revi Ruswandi Eka Revi Ruswandi, Eka Revi Eko Kiswoyo Erwin Dermawan Erwin Dermawan Erwin Dermawan Erwin Dermawan Erwin Dermawan Erwin Dermawan Ery Diniardi Fachri Amrulloh Fadliondi Fahmi Al Diansyah Faisal, Akmal Imam Fathan Mubina Dewadi Fatma Sari Fikri, Muhamad Rausyan Fikriyansyah Fikriyansyah Fikriyansyah, Fikriyansyah Firmansyah Firmansyah Firmansyah Firmansyah Firmansyah Fitriana, Rian Franka Hendra Frisca Amalia Ummay Govinda Gatot Aditya Hadisujoto, Ignatius Budi Sutanto Haris Isyanto Hasan Basri Hasan Basri Hasan Basri Hasan Basri Hasan Basri Hayya Afifah Hendra Saputra Husnaini Zulvian Idhar Mahasen Indra Setiawan Indriasari Indriasari Iphov Kumala Sriwana Irwan Firmansyah Ismiyati Ismiyati Istianto Budhi Rahardja Istianto Budhi Rahardja Istianto Budhi Rahardja Istianto Budhi Rahardja Istianto Budhi Rahardja Iwan Setiawan Januar Parlaungan Siregar Juni Afriani Juniasih, Octarina Adiati Kamila, Fatima Tasya Khoirudin Khoirudin Khoirudin Khoirudin Kisman H Mahmud Korada Viswanatha Sharma Kukuh Haryadi Kushendarsyah Saptaji M Al-Haramain M. Ivan Satryo Manasikana, Dinda Arina Maya Dewi Dyah Maharani Mohd Amiruddin Fikri Mohd Fairusham Ghazali Mohd Hamisa Abdul Hamid Muchamad Oktaviandri Muhamad Ridwan Muhammad Arifangga Muhammad Arifangga, Muhammad Muhammad Dadi Saputra Muhammad Daroji Muhammad Reza Abrori Muhammad Reza Abrori, Muhammad Reza Muhammad, Azka Aulia Mulyadi Mulyadi Munzir Qadri Murtalim Mushoffa Ali Firdaus Mushoffa Ali Firdaus, Mushoffa Ali Mutiara Salsabila N Nelfiyanti Nana Rahdiana Nana Rahdiana Nana Rahdiana Natayu, Amartya Nathanael Tandian Nur Yulianti Hidayah, Nur Yulianti Nurrochman, Taufik Nurul Hidayati Fithriyah Nurul Nadia Mohd Zawawi Nurul Nadia Mohd Zawawi Rachman , Aditya Rahardja, Istianto Budhi Rahmawati Suryani Ramadhani, Mochammad Rafli Rantawi, Azhar Basyir Raslan A. Alenezi Rasma Rasma Rasma Rasma Ratri Ariatmi Nugrahani Rian Fitriana Ricko Valderama Ridhwan Adhitya Ibnimatiin Riki Effendi Rikman Rikman Riza Samsinar Rizalman Mamat Rizkyta, Velia Ayu Roni Muhammad Susanto Rudiatin, Endang Rulan Dinary Rulan Dinary Runik Machfiroh Saeful Bahri Safril Safril Safril Samhuddin Sasi Kirono Semendo, Rifqi Putra Setiawan, Hanif Rama Yuda Sharifah Norsakinah Syed Zainal Abidin Sharma, Korada Viswanatha Shieddieque, Apang Djafar Siregar, Ahdiat Leksi Sitti Nurbaya Ambo Sony Hari Mukti, Sony Hari Sukarman Sukarman Sukarman Sukarman Sukarman Sukarman Sukarman Sukarman Sukarman Sulis Yulianto Sulistiono Sulistiono Sumanto Suripto, Heri Suroto Munahar Susanto, Roni Muhammad Syawaluddin Syawaluddin Syawaluddin Syawaluddin Syawaluddin Syawaluddin Syawaluddin Syawaluddin Syawaluddin Syawaluddin, Syawaluddin Syawaluddin, Syawaluddin Sylvia Madusari Taufik Nurrochman Thomas Djunaedi Tri Yuni Hendrawati Triawan, Farid Trisnadewi, Titin Tumada, Azhari Vector Anggit Pratomo Wahyu Ibrahim Waldi Isnaini Wan Hamzah Azmi Wan Hamzah Azmi Wan Hamzah Azmi Wiwik Sudarwati Wiwit Kartika Sari Yudi Dermawan Yudistirani, Sri Anastasia Yuli Panca Asmara Yusuf Yusuf