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Arirohman, Ilham Dwi
Institut Teknologi Sumatera
Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Other

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Desain dan Analisis Mesin Press Komposit Kapasitas 20 Ton Muhammad Syaukani; Fajar Paundra; Fitrah Qalbina; Ilham Dwi Arirohman; Putty Yunesti; Sabar Sabar
Journal of Science, Technology, and Visual Culture Vol 1 No 1 (2021): Juli 2021
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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Abstract

Composite is a combination of several or more different materials, which produce better properties than their composition properties. The process of making composites can be done with a pressing method which can reduce voids. This pressing method can use a hydraulic press machine. This study aims to design and analyze a hydraulic press machine with a capacity of 20 tons. The design process begins with designing a 3D model using Solidwork Software. Numerical simulation using the finite element method by providing several variations in pressure loads ranging from 5-20 MPa. The results of the analysis show that the maximum von Mises stress is 79.70 MPa with a maximum deformation of 0.0176 mm and the smallest value of safety factor is 2.595. Based on these results, the press machine design is claimed to be safe to operate.
Studi Karakteristik Pola Aliran Stratified pada Pipa Horizontal 16 mm Ilham Dwi Arirohman; Fajar Paundra; Putty Yunesti
Journal of Science, Technology, and Visual Culture Vol 1 No 1 (2021): Juli 2021
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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Abstract

The main objective of this research is to find information about the characteristics of air-water stratified flow in a small horizontal pipe. Experimentally, the characteristics of horizontal co-current stratified flow in 16 mm diameter and 10 m long acrylic pipe were investigated by using conductance method and visual method. The study parameter in the form of liquid film thickness measured using a developed parallel wire sensor is supported by visual data taken using a high speed video camera in the fully developed area (180-210D). In order to obtain observations covering all stratified flow subpatterns, a variation of the superficial velocity of water (JL) from 0.01 – 0.1 m/s and the superficial velocity of air (JG) from 4 – 20 m/s were chosen. The observed flow sub-patterns are then mapped in a flow sub-pattern map based on variations in the superficial velocity of air and water, adding the database from previous studies. In addition, it is also known that the average liquid film thickness decreases as JG increases but it increases as JL increases, while the interfacial wave velocity increases with increasing JG and JL.
Perencanaan Instalasi Penerangan Jalan Umum Tenaga Surya di Kampung Agrowidya Wisata, Rajabasa Jaya Arirohman, Ilham Dwi; Yunesti, Putty; Wicaksono, Rihardian Maulana; Harahap, Al Barra; Miranto, Afit
TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Vol 3 No 1 (2023): TEKNOKREATIF : Jurnal Pengabdian kepada Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LP2M), Institut Teknologi Sumatera, Lampung, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/teknokreatif.v2i2.712

Abstract

Kampung Agrowidya merupakan salah satu desa wisata agro berbasis pertanian dan perikanan yang berlokasi di Rajabasa Raya, namun memiliki kondisi penerangan yang minim pada jalan utama. Berdasarkan kondisi penerangan pada kampung Agrowidya, penelitian ini dilakukan untuk meningkatkan keamanan lingkungan dan menunjang aktivitas masyarakat kampung Agrowidya dengan memanfaatkan tenaga surya. Proses perencanaan pemasangan penerangan jalan umum (PJU) dilakukan dengan pengukuran iluminansi dan dimensi jalan utama serta melakukan pemodelan menggunakan 3 untuk menemukan model penerangan yang sesuai dengan kebutuhan. Hasil opsi pemodelan yang paling efisien berdasarkan SNI 7391:2008 menggunakan software DIAlux diperoleh bahwa jenis lampu LED BRP130 dengan tinggi tiang 5 meter dan sudut kemiringan 15o serta panel surya sebagai sistem suplai listriknya yang berkapasitas 210 Wp dan media penyimpanan energi berupa baterai 140Ah. Diharapkan pemanfaatan dan perancangan panel surya pada penerangan jalan umum ini dapat membantu Kampung Agrowidya dan meningkatkan pemahaman pemahaman masyarakat mitra terhadap pemanfaatan energi surya sebagai salah satu energi baru terbarukan.
PENGARUH VARIASI JUMLAH BLADE TERHADAP PERFORMA HORIZONTAL AXIS WIND TURBINE MENGGUNAKAN QBLADE Syaukani, Muhammad; Sadono, Fajar Sidik; Arirohman, Ilham Dwi; Alfian, Devia G. C; Muhyi, Abdul; Ammar, Naufal
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 5 No. 1 (2024): Edisi Februari
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v5i1.1492

Abstract

Perubahan iklim mendorong kita untuk dapat melakukan transisi dari energi konvesional ke energi baru terbarukan (EBT). Energi angin merupakan salah satu dari sekian banyak jenis energi terbarukan yang dapat dimanfaatkan menggunakan wind turbine. Wind Turbine diklasifikasikan menjadi Horizontal Axis Wind Turbine (HAWT) dan Vertical Axis Wind Turbine (VAWT). Penelitian ini bertujuan untuk mengetahui performa Horizontal Axis Wind Turbine (HAWT) terhadap variasi jumlah bilah  3, 5 dan 7. Pemodelan dan analisis menggunakan Q-Blade untuk memperoleh parameter perfoma seperti Coefficient of Performance (Cp), Daya mekanik, dan Torsi.  Desain bilah HAWT menggunakan airfoil tipe NACA4412 dan panjang 1.2 m pada kecepatan angin 10 m/s dan TSR 7. Hasil Penelitian menunjukkan bahwa performa terbaik pada  TSR 7 adalah HAWT dengan jumlah 3 bilah dengan Cp, torsi, dan daya mekanik tertinggi secara berurutan yaitu 0,46; 21,89 Nm; 1,28 kW.
EVALUASI KINERJA GENERATOR AC SEDERHANA SECARA EKSPERIMEN BERDASARKAN VARIASI KECEPATAN PUTARAN DAN DIAMETER KAWAT Syaukani, Muhammad; Syah, Muhammad Aksel; Arirohman, Ilham Dwi; Afisna, Lathifa Putri; Pujiyulianto, Eko
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.786

Abstract

Small-scale renewable energy use is crucial for supplying the world's electrical needs. Utilizing these renewable energy sources requires a device that can transform mechanical power into electrical power. The purpose of this research is to construct a simple AC generator by converting mechanical power into electricity by varying the copper wire's diameter and rotational speed. The outcomes of the investigation include information on the electrical power, torque, mechanical power, and efficiency of the generator. The technical details of the generator employed are 12 poles, a rotor diameter of 9.25 cm, and a stator diameter of 9 cm. The results of the investigation reveal that the generator with the 0.15 mm variation in copper wire diameter performs better than the generators with the 0.75 mm variation in wire diameter. It can generate 80,6 watts of electric power, 1,231 N.m. of torque, 193,468 watts of mechanical force, and 41.66% of efficiency at a rotational speed of 1500 rpm. The result shows that the generator's performance will vary depending on the diameter of the wire at different rotating speeds.
STUDI NUMERIK KINERJA HEAT SINK BERBASIS ALIRAN DUA FASE DENGAN ETIL ASETAT SEBAGAI ALTERNATIF PENDINGIN CONCENTRATED PHOTOVOLTAICS Arirohman, Ilham Dwi; Naimah, Khoirun; Syaukani, Muhammad; Sabar, Sabar
Jurnal Teknologi Terapan Vol 11, No 2 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i2.814

Abstract

Concentrated Photovoltaic (CPV) technology offers the potential to enhance solar energy conversion by utilizing light focusing technology to increase the solar irradiation flux received by photovoltaic cells. On the other hand, as the solar energy density increases on a PV cell, the surface temperature of the PV also rises, which results in decreased energy conversion efficiency and the possibility of thermal fatigue. Therefore, a reliable cooling system is required for CPV. This study aims to evaluate the performance of a two-phase flow heat sink with ethyl acetate (C4H8O2) as the working fluid, which has a low boiling point and high heat of vaporization, making it quite effective for heat transfer. The method used is numerical simulation using Computational Fluid Dynamics (CFD) software. The simulation results show that the heat sink heat transfer effectiveness is 86.03%, with a thermal resistance value of 0.0073 . The highest temperature on the solid part is 105  showing an increasing trend but not significantly, while the average fluid temperature tends to remain constant at 55 . This indicates that the evaporation process is able to maintain the heatsink temperature at stable level.
Pengaruh Plugging Terhadap Kinerja High Pressure Heater Tipe Shell and U-Tube Heat Exchanger (Studi Kasus: Unit 1- 4 di PT ABC) Muhammad, Ghaffar; Arirohman, Ilham Dwi; Naimah, Khoirun
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 6 No. 2 (2025): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v6i2.23010

Abstract

High Pressure Heater (HPH) is an auxiliary component used to be required in regenerative steam power plants. The component is a heat exchanger utilized to enhance the power plant’s efficiency by enabling high pressure heating process for feedwater before entering the economizer in boiler using bled steam from turbine. The heat transfer effectiveness of HPH needs to be evaluated in relation to its operational conditions which are equipped with plugs to overcome leaks. This study aims to evaluate the impact of number of plugs on the high-pressure heater 5 in unit 1-4 PT ABC regarding heat transfer and its effectiveness. The Number of Transfer Unit (NTU) method along with Log Mean Temperature Difference (LMTD) method were employed in analysis of this research. The existing number of plugs are 4, 574, 100, and 111 in unit 1, 2, 3, and 4 respectively. The result shows that the heat transfer value for high pressure heaters in unit 1-4 PT ABC are 16.18 MW, 10.32 MW, 15.20 MW and 15.08 MW respectively, while the effectiveness value are 0.89, 0.74, 0.88, and 0.88. The study concludes that the effect of number of plugs in high-pressure heater regarding to heat transfer and effectiveness tends to be inversely linear.
Penguatan Pengetahuan Energi Terbarukan Dan Peran Teknik Sistem Energi: Kegiatan Pengabdian Di SMA Negeri 12 Bandar Lampung Dwi Arirohman, Ilham; Naimah, Khoirun; Rizky Zen, Muhammad; Maulana Wicaksono, Rihardian
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 6 : Juli (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

The low public awareness and understanding of renewable energy, particularly among younger generations, remains a challenge for accelerating the energy transition in Indonesia. This community service activity aimed to enhance the knowledge and awareness of students at SMA Negeri 12 Bandar Lampung regarding renewable energy, while introducing the Energy Systems Engineering Program at ITERA as part of the transition solution. The method included planning, interactive dissemination, and evaluation through pre- and post-tests. A total of 135 students participated in the activity, which utilized visual presentations and interactive quizzes (Quizziz). Evaluation results showed a significant increase in student understanding, with more than 93% showing improved post-test scores. These findings indicate that visual and interactive educational approaches are effective in improving energy literacy at the secondary education level. This activity also serves as a practical means of disseminating scientific knowledge from the Energy Systems Engineering field to the broader community.
Pemanfaatan Biogas Dari Limbah Kotoran Sapi Sebagai Alternatif LPG Di Desa Gantiwarno, Lampung Timur Maulana Wicaksono, Rihardian; Rizky Zen, Muhammad; Dwi Arirohman, Ilham; Naimah, Khoirun; Dwi Saputra, Agung; Ridho Hilman, Muhammad
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 5 : Juni (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

Gantiwarno Village in Pekalongan, East Lampung, has significant biogas potential from cow dung. However, the utilization of cow dung is still not optimal, resulting in the surrounding environment being littered with cow dung. Furthermore, the availability of LPG is uncertain, causing its price to fluctuate. Therefore, ITERA Community Service team helped resolve this issue by installing a 4 m3 biogas reactor to convert cow dung into biogas. The stages of this Community Service activity began with a site survey, building relationships with partners, team preparation, construction of the biogas installation, monitoring and evaluation of activities, and the preparation of activity reports. The output of this community service activity was a biogas reactor unit and supporting components such as a biogas stove. Within 7-10 days, the biogas from the cow dung waste began to appear and was immediately used for household cooking needs. Visually, the flame in the biogas stove showed a blue color, indicating that the quality of biogas was not much different from the LPG gas used previously. This biogas reactor can be a renewable, environmentally friendly energy source, making it more energy independent. Furthermore, utilizing biogas can help reduce dependence on LPG, thus saving on weekly electricity needs.
Analysis of Electrical Energy Consumption in Office Buildings of the Institute Technology of Sumatra in Energy Conservation and Efficiency Efforts Naimah, Khoirun; Arirohman, Ilham Dwi; Zen, Muhammad Rizky; Wicaksono, Rihardian Maulana; Soelami, F.X. Nugroho; Rahmatullah, Abri; Purba, Leonardo D.; Gaol, Javeni Eysama L.
Jurnal Edukasi Elektro Vol. 7 No. 2 (2023): Jurnal Edukasi Elektro, Volume 7, Nomor 2, 2023
Publisher : DPTE FT UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jee.v7i2.65003

Abstract

Electrical energy is one of the basic human needs in carrying out various activities or daily activities, especially in office buildings such as office buildings of state higher education institutions, namely the Sumatra Institute of Technology (ITERA). Office buildings are the third highest consumer of electrical energy after shopping centers and hotels. The high demand for electrical energy requires the user sector to make efficiency in energy use. Before making efficiency, it is necessary to know the profile of electrical energy consumption including energy consumption intensity (ECI) and significant energy users. Therefore, in this study, an analysis of electrical energy consumption in each ITERA office building was carried out, through observation and interviews according to SNI / ISO 50002: 2018 energy audit procedures. The results obtained show that the total energy use of the 6 largest buildings (A, B, C, D, E, and F) in May 2023 is 144768 kWh and from the calculation of the ECI value is in the very efficient category (7.44 kWh/m2/month). From 6 existing buildings, there are 3 buildings that are very efficient, 1 building is efficient, and 2 buildings are quite efficient. Then, significant energy users were found by 83% in building C AC. Recommendations for saving energy in the effort of energy conservation and efficiency that can be done include, making changes in habits / patterns of use of electrical energy user equipment, especially in air conditioners and dispensers, so as to save electricity 2-21%, and retrofitting refrigerant AC types of split ducts and cassettes that still use R-22 with MC-22 which can save electricity 15-25%.
Co-Authors Achmad Gus Fahmi Afit Miranto Akhmad Zidni Hudaya Al Barra Harahap Alfian, Devia G. C Ammar, Naufal Apriansyah Julio Aryadi, Anugrah Wahyu Bahar, Aditiya Harjon Deendarlianto Devia Gahana Cindi Alfian Devy Arysandi Dwi Saputra, Agung Fahmi Sapta Hadi Fajar Paundra Fajar Paundra Fitrah Qalbina Gaol, Javeni Eysama L. Harahap, Al Barra Harmiansyah Hotdimas Simanjuntak I Indarto Ismail, Abdi Khoirun Naimah Kiki Yuli Handayani Lathifa Putri Afisna Madi Madi Maulana Wicaksono, Rihardian Muhammad Khanafi Muhammad Syaukani Muhammad, Ghaffar Muhyi, Abdul Naimah, Khoirun Pujiyulianto, Eko Purba, Leonardo D. Putty Yunesti Putty Yunesti Rahmat Ramadhan Wahab Rahmatullah, Abri Ridho Hilman, Muhammad Rihardian Maulana Wicaksono Rizky Zen, Muhammad Sabar Sabar Sadono, Fajar Sidik Shintha Sarmila A.S Yahya Siti Muslimah Soelami, F.X. Nugroho Sofyan, Sarwo Edhy Syah, Muhammad Aksel Tuswan Tuswan Wicaksono, Rihardian Maulana Yulianti Fatmawati Yunesti, Putty Zen, Muhammad Rizky