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All Journal Jurnal Teknosains SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Prosiding Semnastek Majalah Ilmiah MOMENTUM International Conference on Coastal and Delta Areas R.E.M (Rekyasa Energi Manufaktur) Jurnal Rekayasa Teknologi Jurnal SOLMA Prosiding Seminar Nasional Teknoka Dinamisia: Jurnal Pengabdian Kepada Masyarakat JURNAL KAJIAN TEKNIK ELEKTRO Bantenese Jurnal Pengabdian Masyarakat SULUH: Jurnal Abdimas Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Motor Bakar : Jurnal Teknik Mesin Jurnal Pengabdian kepada Masyarakat Nusantara Jurnal Pengabdian Masyarakat Asia Jurnal Mesin Nusantara Sawala : Jurnal pengabdian Masyarakat Pembangunan Sosial, Desa dan Masyarakat DEVICE Jurnal Polimesin Metalik: Jurnal Manufaktur, Energi, Material Teknik
Oktarina Heriyani
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Studi Numerik Analisa Pengaruh Variasi Longitudinal dan Transversal Pitch terhadap Performa Fin and Tube Heat Exchanger Safi'i, Muhamad; Sinaga, Nazaruddin; Khoirunnisa, Martha; Putra Arya, Muhammad Iqbal Farhan; Nugroho, Agung; Priangkoso, Tabah; Susanto, Susanto; Suheri, Suheri; Heriyani, Oktarina; Effendi, Yafid
JURNAL ILMIAH MOMENTUM Vol 20, No 2 (2024): Vol 20, No 2
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v20i2.11945

Abstract

AbstrakFin and tube heat exchanger banyak digunakan dalam sistem pendingin, petrokimia, dan aplikasi HVAC&R karena pembuatannya lebih mudah, konstruksinya sederhana, rendah biaya, dan relatif mudah dalam perawatan menjadikannya salah satu yang paling umum digunakan. Peningkatan kebaikan perpindahan panas pada fin and tube heat exchanger telah banyak di investigasi guna untuk meningkatkan performanya. Riset ini dilakukan untuk mengetahui pengaruh variasi rasio arah longitudinal dan transversal pitch pada fin and tube heat exchanger terhadap performa termalnya. Metode numerik menggunakan program komputer Computational Fluid Dynamics digunakan pada riset ini. 2 variasi rasio diajukan dalam riset ini yakni variasi untuk arah longitudinal pitch 18,05; 17,05; 16,05; 15,05; 14,05 (mm) sedangkan arah transversal pitch 11,7; 10,7; 9,7; 8,7; 7,7 (mm) dengan variasi kecepatan aliran fluida 0.5 m/s, 1 m/s, 1,5 m/s, 2 m/s, 2.5 m/s, 3 m/s, dan 3,5 m/s dengan heat flux konstan sebesar 100 W. Hasil terbaik penelitian ini di dapatkan pada variasi rasio arah longitudinal pitch 14,5 mm dengan nilai koefisien perpindahan panas sebesar 97,24 W/m²K, sedangkan rasio arah transversal pitch sebesar 11,7 mm dengan nilai koefisien perpindahan panas sebesar 107,82 W/m²K. Hasil tersebut mengkonfirmasi bahwa variasi rasio arah longitudinal pitch 14,5 mm dan rasio arah transversal pitch sebesar 11,7 mm dapat digunakan untuk aplikasi praktis dan dapat diterapkan secara langsung dilapangan.  
Comparative Analysis of Waterwheel Efficiency Using Nozzle and Open Canal on Waterway Soleh Pohan, Abdul Rahman; Mugisidi, Dan; Nurfadillah, Zaka; Heriyani, Oktarina
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 17, No 2 (2023): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.17.2.143-150

Abstract

Water flow in irrigation is a means of obtaining electric power, which is commonly called microhydro. The waterwheel is the main component of the microhydro energy conversion process. The amount of energy converted by a waterwheel depends on the shape of its model, blade shape and the location of the installer. This study aimed to identify the characteristics of optimally efficient waterwheels. In addition to the energy of the place (i.e., the head), the influence of the weight of the water flowing into the blades of the waterwheel must be considered. This study also aimed to determine the effectiveness of mill performance by comparing waterways that use nozzles with those that use open canals. An experimental method was used to design a waterwheel system by testing the efficiency ratio between the nozzle line and the open canal. This test used the following variable water discharge rates: 12 m3/hr, 14 m3/hr, 16 m3/hr, 18 m3/hour and 20 m3/hr. Using the nozzle line with the largest discharge rate of 20 m3/hr, an rpm of 192.7 is produced with a torque of 0.7 Nm. The waterwheel produced 14.13 watts, with an efficiency of 64.75%. A line that used an open channel at the highest discharge rate of 20 m3/hr produced 61.7 rpm with 0.7 Nm of torque and 4.52 watts with an efficiency of 20.71%. The speed of water flow in the nozzle line was faster than in the open canal path, causing the tangential force on the waterwheel to be greater than on the open canal path. Based on these results, it was concluded that the path was the most efficient when using a nozzle.
The Influence of Water Temperature on Seawater Evaporation in the Desalination Process Sayuti, Adi Tegar; Mugisidi, Dan; Wirangga, Ristanto; Heriyani, Oktarina
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 17, No 2 (2023): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.17.2.113-119

Abstract

Population An increase in population in an area results in an increased demand for clean water. Although water is abundant, about 97% of the water on Earth is seawater, which cannot be consumed directly because it contains harmful substances. Desalination process is used to convert seawater into drinking water by utilizing heat and wind speed. This research explores temperatures of 30℃, 45℃, 60℃, and 70℃ with a wind speed of 2.6 m/s. Data was collected for each temperature variation for 2 hours with records every 15 minutes, aiming to evaluate the effectiveness of evaporation and condensation in the desalination process. The results showed that 70℃ resulted in the highest evaporation (800 grams), although with a condensation rate of 26.25%. Condensate measurements showed a pH of 7.2 and TDS meter readings ranged from 125 to 138 ppm.
The Influence of Nozzle Injection Pressure on Seawater Evaporation Inside an Evaporator Tube Aji, Ikbal Prasetiyo; Mugisidi, Dan; Yusuf, Ahmad Maulana; Heriyani, Oktarina
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 18 No. 1 (2024): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.18.1.1-5

Abstract

Indonesia, the largest archipelagic country in the world, possesses a vast marine area. Despite being surrounded by the sea, many coastal communities in Indonesia lack access to clean water. Seawater distillation presents a viable solution to this scarcity. This process involves separating salt from seawater to produce fresh water. This study aims to analyze the effect of nozzle spray pressure on the evaporation process of seawater to optimize fresh water production. Experiments were conducted using a fogging nozzle with a diameter of 0.3 mm, varying the nozzle pressure at 40 psi, 70 psi, and 100 psi. The data were statistically analyzed to determine the impact of nozzle pressure on seawater evaporation. The results indicate that the highest evaporation occurred at a nozzle pressure of 40 psi, yielding 10 g of condensed seawater, whereas the lowest evaporation was observed at 100 psi, producing 4 g.
Evaluating Wind Deflector Effect on Cargo Vans Aerodynamic Drag Using Computational Fluid Dynamics Agus Fikri; Ariyansah, Riyan; Firman Noor Hasan; Oktarina Heriyani; Rosalina; Sistani, Muhammad Ghiffar
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6073

Abstract

Suboptimal design and body shape in freight transport vehicles can lead to increased aerodynamic drag. To address this issue, the use of wind deflectors is proposed as a solution to reduce aerodynamic resistance in cargo vans. The methodology employed in this research involves Computational Fluid Dynamics (CFD) simulations using the Ansys Fluent R2 2023 software. CFD simulations were conducted on the design of a cargo box vehicle with variations in Wind Deflector Models 1, 2, and 3, employing identical boundary condition parameters. The results of the CFD simulation for Wind Deflector Model 3 exhibited the lowest drag force at 1.1531116 Newton and a drag coefficient of 0.37031338. In conclusion, a comprehensive analysis of the CFD simulation results provides valuable insights into the intricate aerodynamic implications of Wind Deflector variations on cargo vans. Therefore, it is concluded that Wind Deflector Model 3 emerges as the optimal choice, showcasing superior aerodynamic characteristics.
Analysis of Vibration Characteristics in 17-Inch Aluminum Alloy Wheel Rims Using Finite Element Method Wijaya, Victor Indra; Ariyansah, Riyan; Agusman, Delvis; Rifky; Heriyani, Oktarina
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6620

Abstract

The wheel rim serves as a component designed to provide stability and necessary support for vehicle tires. The phenomenon of resonance occurring when the external vibration frequency approaches the natural frequency of the structure has the potential to increase vibration amplitude, which can lead to wheel rim damage. This study aims to investigate the shape patterns and natural frequencies of 17-inch aluminum alloy wheel rims, as well as to analyze the maximum total deformation that occurs. The finite element method is employed to simulate the vibration characteristic of 17-inch aluminum alloy wheel rims under various natural frequencies. Modifications to the wheel rim design are made by altering the spoke angle in variations of 5°, 10°, and 15°. The vibration characteristic data of the wheel rim was obtained through simulation using ANSYS software. The research findings indicate that the natural frequencies range from approximately 364.7 Hz to 723.21 Hz. Furthermore, the maximum total deformation values range from approximately 9.7 mm to 22.5 mm.
Convective Coefficient and Evaporative in Forced Flow Solar Still Oktavian, Akbar; Mugisidi, Dan; Alamsyach, Rizky; Heriyani, Oktarina
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6937

Abstract

The water crisis is a significant global problem, with more than 2 billion people lacking water and 1.1 billion having no access to clean water. Desalination, a method of converting seawater into fresh water by removing salt, is a potential solution to help coastal populations. This study aims to determine the convection and evaporation heat transfer coefficients and the effect of condenser cooling water temperature on the evaporation process and the increase in freshwater condensate. The research methodology involved the analysis of heat and mass transfer in a solar desalination system. A desalination device was designed to test the evaporation process with seawater temperature heated using halogen lamp light. Results show that increasing seawater temperature from 27°C to 42°C results in condensation when the temperature reaches about 30°C, affecting the water surface pressure and evaporation rate. Evaporation and condensation efficiencies are affected by convection and evaporation heat transfer, resulting in a convection heat transfer (0.84296 W/m2. °C) and evaporation heat transfer coefficient (23.81353 W/m2.°C). This research demonstrates the potential of solar desalination technology in producing clean water.
Laju Penguapan Pada Forced Flow Solar Still Alamsyach, Rizky; Mugisidi, Dan; Oktavian, Akbar; Heriyani, Oktarina
Jurnal Mesin Nusantara Vol 7 No 2 (2024): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v7i2.22887

Abstract

Air bersih semakin langka di seluruh dunia akibat polusi, perubahan iklim, dan pertumbuhan penduduk. Salah satu solusi adalah desalinasi air laut dengan metode solar still yang ramah lingkungan. Penelitian ini fokus pada forced flow solar still yang memanfaatkan aliran udara untuk meningkatkan laju penguapan dan produktivitas air tawar. Temperatur air mempengaruhi kinerja solar still; semakin tinggi temperatur air dan kecepatan aliran udara di dalam solar still, maka penguapannya juga akan meningkat. Penelitian ini bertujuan menentukan laju penguapan air laut dalam forced flow solar still. Perangkat desalinasi ini menggunakan kondensor dan pengukuran parameter seperti temperatur dan kecepatan aliran udara, dengan data penguapan dikumpulkan setiap 15 menit selama 2 hari. Hasil penelitian menunjukkan bahwa forced flow solar still efektif meningkatkan laju penguapan. Temuan ini dapat membantu meningkatkan efisiensi desalinasi menggunakan solar still dengan mempertimbangkan faktor iklim lokal. 
Pembangkit Listrik Menggunakan Generator Termoelektrik pada Dinding Model Bangunan Rifky; Reza Ferizal Akbar; Oktarina Heriyani; Riyan Ariyansah; Akhmad Rizal Dzikrillah
Prosiding Seminar Nasional Teknoka Vol 9 (2024): Proceeding of TEKNOKA National Seminar - 9
Publisher : Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. Hamka, Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/teknoka.v9i1.17445

Abstract

This research was initiated by the idea of making building materials and/or building components/parts into sources of electrical energy, especially on the roof and walls of buildings. Building roofs and walls have the potential as a means of utilizing solar energy into electrical energy with a thermoelectric generator (TEG) converter. Therefore, the aim of this research is to obtain the performance of thermoelectric generators with series and parallel circuits as power generators on the walls of building models. The research methodology used is experimental which begins with designing research equipment consisting of a building model frame and a thermoelectric system arrangement. In this research, a series and parallel TEG circuit was compared. Both sets of TEG systems have aluminum attached to absorb heat from the sun on the hot side of the TEG and a water block made of aluminum is attached to the cold side of the TEG. Styrofoam is attached to the surrounding sides between the TEG modules as a thermal insulator. The parameters in this research consist of independent variables, moderator variables and dependent variables. The independent variables are the temperature of the hot side of the TEG and the temperature of the cold side of the TEG. The moderator variables are good water temperature, water discharge, water temperature entering the waterblock, water temperature leaving the waterblock. Meanwhile, the dependent variables are electric current strength, electric voltage, electric power, and TEG efficiency. The research results showed that the maximum electric current was 0.54 A and the maximum electric voltage was 0.08 V. The maximum electric power as output power from the TEG system was 0.0432 W and the average thermoelectric efficiency was 4%.
STUDI NUMERIK PENGARUH EXTERNAL FORCE TERHADAP KEKUATAN POROS POMPA SENTRIFUGAL JENIS N 32–125 Safi'i, Muhamad; Ashar, Ilham Ariawan; Ramdhani, Ahmad; Fahmi, Muhammad Idrokul; Saputra, Muhamad Juli; Ramadan, Hamdan; Rozaki, Syahrul Maulana; Pangestu, Anugrah Widhi; Effendi, Yafid; Heriyani, Oktarina
Motor Bakar : Jurnal Teknik Mesin Vol 9, No 1 (2025): Motor Bakar: Jurnal Teknik Mesin
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/mbjtm.v9i1.13185

Abstract

AbstrakPompa adalah mesin yang berfungsi untuk memindahkan fluida dengan cara merubah energi mekanis menjadi energi fluida dan tekanan, mengangkut fluida melalui sistem perpipaan. Keandalan dan kekuatan poros pompa sentrifugal menjadi perhatian utama pada penelitian ini. Penelitian tentang pengaruh besaran force yang bekerja pada poros pompa sentrifugal terhadap kekuatan poros pompa sentrifugal dengan metoda numerik Finite Element Method (FEM) dilakukan dengan menggunakan aplikasi komputer Solidworks simulation. Besaran force yang bekerja pada poros pompa sentrifugal dengan material baja AISI 1020 sebesar 50 N, 75 N, dan 100 N di usulkan. Hasil penelitian menunjukkan bahwa poros pompa sentrifugal memiliki nilai tegangan von Mises, displacement, dan strain yang tinggi seiring ditingkatkannya force yang bekerja. Hasil ini diharapkan dapat digunakan untuk referensi perancangan poros pompa sentrifugal dan dapat diterapkan untuk mempertimbangkan faktor kemanan pada poros pompa sentrifugal di lapangan. 
Co-Authors Abdul Rahman Abdul Rahman Soleh Pohan Adittia Fajar Afandi, Rizki Afif Agus Fikri Agus Fikri Ahmad Ramdhani, Ahmad Aji, Ikbal Prasetiyo Akhiruddin Maddu Akhmad Rizal Dzikrillah Alamsyach, Rizky Aldi fadillah Amin, Syahrul Ashar, Ilham Ariawan Atiqah Mutia Avorizano, Arry Cahyani, Regita Septia Choirul Prayoga Dan Mugisidi Deka Rama Ligustian Delvis Agusman Dimas Ramadhan Putra Dimas Ramadhan Putra Dwi ASTUTI Dwibowo, Dany Alvian Dzikrillah, Achmad Rizal Eddy Ramdan Eef syaifuloh Emilia Roza Enrico Chiesa Virgianto Fadhlurrahman Zaki Fahmi, Muhammad Idrokul Faldy Irwiensyah Farhan Putra Arya, M. Iqbal Faturahman, Hamdi Fauzi, Herman Fikri, Agus Firman Noor Hasan Hamdi Faturahman Hamdi Faturohman Hamzah, Arif Hangga Putra Prabawa Harry Ramza Hendi Saryanto Hilmi, Irfan Ikbal Prasetiyo Aji Jayawarsa, A.A. Ketut Jhav Sund Oktoricoento Khoirunnisa, Martha Luhung, Rizal Andi M Mujirudin M. Mujirudin M.Kom, Sugema Mohammad Mujirudin Mohammad Yusuf D Muhammad Ramdani Muhammad Rayhan Muhammad Zahir Bahasyim Mujirudin, Mohammad N, Kevin Sigit Dwi Nazaruddin Sinaga Nofendri, Yos Nugroho, Agung Nurfadillah, Zaka Nurkholid, Nurkholid Oktavian, Akbar Oktoricoento, Jhav Sund Pancatatva Hesti Gunawan Pangestu, Anugrah Widhi Parwatmoko, Giri Putra Arya, Muhammad Iqbal Farhan Ramadan, Hamdan Ramza, Harry Regita Septia Cahyani Reza Ferizal Akbar Rifky, Rifky Riyan Ariyansah Rizal Andi Luhung Rosalina Rozaki, Syahrul Maulana Safi'i, Muhamad Sahrudin Sahrudin Sahrudin Sahrudin Sahrudin, Sahrudin Saputra, Muhamad Juli Sayuti, Adi Tegar Sistani, Muhammad Ghiffar Soleh Pohan, Abdul Rahman Sugema Sugema M.Kom Suheri Kertosenjoyo2, Suheri Sulistiono, Ibnu Supardi Atisina Susanto Susanto Susanto Susanto Tabah Priangkoso Tegar Imaniar Kusnanto Widodo Widodo Wijaya, Victor Indra Wirangga, Ristanto Yafid Effendi Yoga Aditya Yulikastomo yusuf, Ahmad Maulana Zaka Nurfadilah