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All Journal Traksi : Majalah Ilmiah Teknik Mesin Rekayasa Mesin JURNAL PASTI (PENELITIAN DAN APLIKASI SISTEM DAN TEKNIK INDUSTRI) OPERATION EXCELLENCE: Journal of Applied Industrial Engineering Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi G-Tech : Jurnal Teknologi Terapan Motor Bakar : Jurnal Teknik Mesin JURNAL PENELITIAN PENDIDIKAN BAHASA DAN SASTRA Jurnal Instrumentasi Jurnal VORTEKS International Journal of Research in Vocational Studies (IJRVOCAS) MACHINERY: Jurnal Teknologi Terapan Jurnal Derma Pengabdian Dosen Perguruan Tinggi (Jurnal DEPUTI) JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Abdimas Indonesian Journal Prioritas : Jurnal Pengabdian Kepada Masyarakat International Journal of Economics (IJEC) IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat Impression : Jurnal Teknologi dan Informasi IESM JRTI (Jurnal Riset Tindakan Indonesia)
Siregar, Zufri Hasrudy
Prodi Teknik Mesin, Fakultas Teknik, Universitas Al Azhar Medan
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology 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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Penggunaan bor mesin dengan sistem kontrol elektropnumatik guna peningkatan efisiensi kerja di industri Muammar Alfin Sagala; Zufri Hasrudy Siregar; Edy Syahputra Saragih; Mawardi Mawardi; Andri Ramadhan
JRTI (Jurnal Riset Tindakan Indonesia) Vol. 10 No. 1 (2025): JRTI (Jurnal Riset Tindakan Indonesia)
Publisher : IICET (Indonesian Institute for Counseling, Education and Therapy)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/30036242000

Abstract

Tujuan penelitian ini yaitu menganalisis pengaruh variasi putaran terhadap laju pengeboran pada mesin bor dengan kontrol elektropneumatik dan mengkaji pengaruh alir udara terhadap laju pengeboran pada sistem yang sama. Metode yang digunakan dalam penelitian ini yaitu eksperimental dan analisis pengaruh kecepatan mesin terhadap debit udara dan waktu rata-rata, dimana alat yang digunakan dalam penelitian ini yaitu mesin gergaji dan las listrik dengan bahan adalah plat besi galvanis dengan tebal 4 mm. Keterbaruan penelitian ini yaitu mencari pengaruh kecepatan, waktu dan debit udara dalam aplikasi mesin bor, hasil yang didapt dalam penelitian ini yaitu pada saat pengeboran pada variasi putaran (1 putaran, 2,5 putaran, 4 putaran, 5,5 putaran, 7 putaran, 8,5 putaran) diperoleh waktu masing-masing 4,27 dtk, 2,52 dtk, 1,64 dtk, 1,54 dtk, 0,82 dtk, 0,75 dtk dan semakin besar variasi putaran (8,5 putaran) yang dipakai maka semakin tinggi kecepatannya (0,0466 m/dtk) dan semakin besar debit udara (7,272 ltr/mnt) yang digunakan.
Efisiensi dan kesesuaian kapasitas sistem Plumbing pada bangunan tinggi berdasarkan beban air hunian dan fasilitas pendukung Zufri Hasrudy Siregar; Arif Fadillah Nasution; Refiza Refiza
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 1 (2026): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i1.15105

Abstract

The rapid growth of vertical housing in urban areas increases the complexity of plumbing system management, as the system must ensure reliable water supply, energy efficiency, and service performance for a large number of occupants simultaneously. However, most plumbing system designs still rely on conventional assumptions such as 120 L/person/day water demand and 3 days of storage capacity, which often do not represent the actual consumption patterns of modern buildings. This study aims to evaluate the efficiency and capacity suitability of plumbing systems in high-rise residential buildings based on occupant water demand and supporting facilities. The novelty of this research lies in the development of an integrated Key Performance Indicators (KPI) framework consisting of four main dimensions: water efficiency, pump energy efficiency, hydraulic service quality, and user comfort. The research method involves numerical analysis of water demand based on the number of occupants, evaluation of Ground Water Tank (GWT) and Sewage Treatment Plant (STP) capacities, and system performance assessment using quantitative KPI metrics. The results demonstrate that the proposed evaluation model effectively identifies operational efficiency levels and provides an analytical basis for optimizing plumbing capacity and sustainable building utility management.
Validation of Experimental Study and SimulationOTEC Power Plant using Shell-Tube Heat Exchanger Materials with Copper, Tin, and Working Fluid Ammonia Mawardi, Mawardi; Siregar, Zufri Hasrudy; Nugraha, Yoga Tri; Rida, Rizkha; Fahri , Tengku Muhammad; Irwanto, Muhammad
Jurnal Rekayasa Mesin Vol. 17 No. 1 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v17i1.2049

Abstract

The results of experimental research on marine thermal power plants using a shell and tube heat exchanger made of copper-tin (Cu-Sn) alloy are the main focus of this study. This study uses a heat exchanger Scale Model measuring 60 mm wide x 1 meter long. The system operated using a closed cycle and Organic Rankin cycle. A simulation study has been carried out using Ansys CFD software to model new heat exchangers, namely models A and B. The interaction between ammonia and hot water produces thermodynamic values in the form of an evaporator outlet temperature of 28°C in models A and B 260C. The weakness of model B is that the turbulent flow is divided into left and right sides so that heat loss occurs in the flow corner area. The seawater inlet temperature of 29°C can heat the working fluid from the ammonia flow inlet from 5°C to 28°C, resulting in saturated steam reaching 5-6 bar.
Configurations and Efficiency of Plumbing Systems in High-Rise Buildings: A Systematic Literature Review and Scopus based publication trends (2000–2025) Zufri Hasrudy Siregar; Arif Fadillah Nasution; Yuri Dwi Lianto; Refiza
Jurnal VORTEKS Vol. 7 No. 1 (2026): April 2026
Publisher : Program Studi Teknik mesin, Fakultas Teknik, Universitas Al Azhar Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/vorteks.v7i1.533

Abstract

High-rise building plumbing systems face increasing challenges related to hydraulic efficiency, energy consumption, and sustainable water management. This study aims to analyze the evolution of plumbing system configurations, efficiency strategies, and emerging research trends through a Systematic Literature Review and bibliometric analysis of Scopus-indexed publications from 2000–2025. The novelty of this research lies in integrating hydraulic engineering, smart building technology, IoT, and AI within a unified analytical framework focused on tropical high-rise buildings. PRISMA methodology, Bibliometrix-R, and VOSviewer were employed to evaluate 751 documents. The results reveal rapid growth in smart plumbing research, emphasizing energy optimization, digital monitoring, and AI-based water management systems.
Evaluasi Kritis dan Model Alternatif Hunter Curves untuk Sistem Plumbing Gedung Bertingkat di Medan Zufri Hasrudy Siregar; Arif Fadillah Nasution; Mawardi Mawardi; Refiza Refiza; Suherman Suherman
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 2 (2025): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i2.13638

Abstract

Clean water is a fundamental necessity in high-rise buildings, so calculating peak water demand is a critical aspect of plumbing system design. So far, planners in Indonesia still rely on Hunter Curves (1940), a classic method developed in the United States and has been used for more than eight decades. The Hunter method is no longer relevant because water consumption patterns have changed, the use of water-saving devices is becoming more widespread, and the characteristics of tropical buildings in Indonesia are different from Hunter's basic assumptions. This study critically evaluates Hunter Curves through a case study of the Lexington Tower Medan Healthcare Building (20 floors, 160 units), comparing the Hunter method with an alternative model based on a locally calibrated Monte Carlo probabilistic simulation (P95). Monte Carlo simulations were performed in 10,000 iterations using MATLAB-based stochastic modeling to obtain peak discharge distributions. The results showed a peak discharge according to Hunter of 34,695 L/s, while the alternative model reached 37,440 L/s (+7.91%). This difference affects the pipe dimensions and pump power, but the additional energy cost (±Rp850,000/year) is commensurate with the increased reliability of the system. This study confirms that Hunter Curves are obsolete and need to be replaced by a more accurate, energy-efficient, and sustainable approach
Analisis Pengaruh Underpass Gatot Subroto Terhadap Kemacetan Studi Kasus Persimpangan Jl. Gatot Subroto – Jl. Gagak Hitam Di Kota Medan Muhammad Arif Abdillah; Muhammad Abdi Ridha; Adinda Juwita Nasution; Simon Petrus H Simorangkir; Zufri Hasrudy Siregar
Impression : Jurnal Teknologi dan Informasi Vol. 5 No. 1 (2026): Maret 2026
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v5i1.1453

Abstract

Permasalahan kemacetan lalu lintas di Kota Medan semakin meningkat seiring dengan pertumbuhan jumlah kendaraan bermotor, khususnya pada persimpangan Jalan Gatot Subroto dengan Jalan Gagak Hitam/Ring Road. Penelitian ini bertujuan untuk menganalisis efektivitas pembangunan underpass dalam mengurangi kemacetan serta meningkatkan kinerja lalu lintas di kawasan tersebut. Metode yang digunakan adalah Before–After Study (sebelum–sesudah) dengan pendekatan kuantitatif berdasarkan pedoman Direktorat Jenderal Bina Marga (MKJI 1997). Data yang dianalisis merupakan data primer hasil survei lalu lintas pada jam puncak sore (16.00–19.00), meliputi volume kendaraan, Lalu Lintas Harian Rata-rata (LHR), derajat kejenuhan (DS), dan tingkat pelayanan jalan (LOS). Data sebelum dan sesudah pembangunan underpass kemudian dibandingkan untuk mengetahui perubahan kinerja lalu lintas. Hasil penelitian menunjukkan bahwa pembangunan underpass memberikan dampak positif terhadap kelancaran lalu lintas, yang ditandai dengan penurunan nilai LHR serta membaiknya derajat kejenuhan dan tingkat pelayanan jalan. Dengan demikian, underpass dapat menjadi solusi efektif dalam mengurangi kemacetan di kawasan perkotaan. Traffic congestion in the city of Medan has been increasing in tandem with the growing number of motor vehicles, particularly at the intersection of Gatot Subroto Street and Gagak Hitam Street/Ring Road. This study aims to analyze the effectiveness of constructing an underpass in reducing congestion and improving traffic performance in that area. The method used is a Before–After Study with a quantitative approach based on the guidelines of the Directorate General of Highways (MKJI 1997). The analyzed data consists of primary data from traffic surveys conducted during the evening peak hours (4:00 PM–7:00 PM), including vehicle volume, Average Daily Traffic (ADT), degree of saturation (DS), and Level of Service (LOS). Pre- and post-underpass construction data were then compared to determine changes in traffic performance. The results of the study indicate that the construction of the underpass has a positive impact on traffic flow, as evidenced by a decrease in ADT and improvements in the degree of saturation and level of service. Thus, underpasses can serve as an effective solution for reducing traffic congestion in urban areas.
Implementasi Kerja Sama Universitas Al-Azhar dan UniMAP dalam Pengabdian Masyarakat melalui Diskusi Perluasan Hutan Mangrove Nurdiana Nurdiana; Zufri Hasrudy Siregar; Yoga Tri Nugraha; Suherman Suherman; Adinda Juwita Nasution; Rizkha Rida; Muhammad Irwanto; Muzammil Bin Jusoh
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 3 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v3i3.257

Abstract

Partnerships between universities and partner institutions are strategic for study program accreditation and for implementing the Tri Dharma of Higher Education. In 2025, Al-Azhar University established an international collaboration with Universiti Malaysia Perlis (UniMAP) and the Village Forest Management Institution (LPHD) of Pasar Rawa, Langkat Regency, in the field of community service. The activities included a networking session, strategic discussions on converting palm oil plantations back into mangrove forests, and a joint mangrove planting action. This initiative aims to restore coastal ecosystems as habitats for marine life, such as fish, crabs, and shrimp. Through this synergy, it is expected that the motivation of the Pasar Rawa Village community, particularly the LPHD, will increase in managing and preserving the mangrove area sustainably for the welfare of the coastal ecosystem.
Pengolahan Gas Buang Hasil Pembakaran Campuran Refuse Derived Fuel dan Serbuk Gergaji dengan Spray Tower Scrubber Ilmi Ilmi; Junjungan Simamora; Suherman Suherman; Zufri Hasrudy Siregar
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i1.190

Abstract

The growing volume of waste has encouraged the use of fuel derived from waste as an alternative energy source. However, its combustion releases flue gas containing harmful pollutants. This study assesses the effectiveness of a spray tower in reducing the opacity and temperature of flue gas generated from the combustion of a mixture of waste-based fuel and sawdust. Experiments used three fuel masses and three system setups: no sprayer, two sprayers, and four sprayers. Results showed that the spray tower reduced opacity from 33 per cent to about 15 per cent with two sprayers and 11.2 per cent with four sprayers. Gas temperature decreased from 65 degrees Celsius to 39 degrees and 35 degrees Celsius. A higher number of sprayers led to greater pollutant reduction. This technology shows promise as an environmentally friendly method for controlling emissions.
Pengembangan model Community Water Quality Screening berbasis TDS meter dan PH meter untuk meningkatkan literasi masyarakat terhadap air layak konsumsi di Desa Bandar Baru Zufri Hasrudy Siregar; Adinda Juita Nasution; Yuri Dwi Lianto; Syafrida Hanum; Refiza; Ilmi Abdullah; Riana Puspita; Arif Fadillah Nasution
Jurnal Derma Pengabdian Dosen Perguruan Tinggi (Jurnal DEPUTI) Vol. 6 No. 2 (2026): Juli 2026
Publisher : LPPM Universitas Al-Azhar medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54123/deputi.v6i2.570

Abstract

Limited access to laboratory testing encourages communities to assess water mainly by clarity, odor, and taste. This approach cannot adequately detect changes in physicochemical characteristics. This community engagement program developed a Community Water Quality Screening model using TDS and pH meters in Bandar Baru Village. The model integrates education, calibration, duplicate measurements, restricted interpretation, risk communication, and laboratory referral. The analytical draft uses a structured simulated dataset of 48 participants and 72 water samples from six source types. Analyses included descriptive statistics, paired t tests, McNemar tests, Kruskal-Wallis tests, chi-square tests, Spearman correlations, intraclass correlation coefficients, and linear regression. Mean literacy scores increased from 42.0 to 70.6 out of 100, a mean increase of 28.5 points (95% CI 25.9-31.1; p<.001). 85.4% of participants mastered at least eight of ten procedural steps. Of 72 samples, 44 were classified as green, 22 as yellow, and 6 as red. Water source type was associated with screening category (chi-square=33.36; p<.001; Cramer V=0.48). Duplicate measurements showed very high consistency for pH (ICC=0.998) and TDS (ICC=1.000). The model offers a practical educational framework but does not replace microbiological and comprehensive chemical testing.
Co-Authors Abdul Latif S Acim Maulana Adi Widarma Adinda Juita Nasution Adinda Juwita Nasution Ainul Izzah Alhadi, Rafli Andre Effendi Anita Christine Sembiring Apollo Apollo Ari Beni Santoso Arif Fadillah Nasution Arif Fadillah Nasution Arif Fadillah Nasution Arif Fadillah Nasution Asmara Sari Nasution Aziz Ahmadi Syam Dedi Sarwedi Dermawan Hutagaol, Dermawan Diana Suita Harahap Donni Syahrial Edy Syahputra Saragih Effendi, Andre Eva Vivi Aniceta Situmorang Fahri , Tengku Muhammad Fathur Rahman Bandio Fazri, Muhammad Feri Wahyudi Hapzi Ali Harahap, Uun Novalia Husni Thamrin Ikhwan, Rosendra Ilmi Abdullah Ilmi Ilmi Indra Gunawan Purba Indriyani Indriyani Indriyani Indriyani Irwanto, Muhammad Jaka Tri Hadiyatna Jarnawi Hadi Saputra Tanjung Jayawarsa, A.A. Ketut Jeki Armando Simanjorang Jufrizal Jufrizal Junjungan Simamora Mahadi Sihombing, Panagian Marqie Subahaqia Ningsih Mawardi Mawardi Mawardi Mawardi Mawardi Mawardi Moraida Hasanah Muammar Alfin Sagala Muhammad Abdi Ridha Muhammad Andika, Muhammad Muhammad Arif Abdillah Muhammad Dendy Agusdiandy Muhammad Irwansyah, Muhammad Muhammad Irwanto Muhammad Yasir Muzammil Bin Jusoh Nasution, Arif Fadillah Ningsih, Margie Subahagia Ningsih, Marqie Subahaqia Nurdiana Pedro Da Silva Prinsi Rigitta Putra, Bintang Kelana Raden Mohamad Herdian Bhakti Raja Imran Rasidi Sitorus Ramadhan, Andri Rambe, Fajar Noer Refiza Refiza Refiza Refiza Refiza Refiza Refiza Refiza Refiza, Refiza Riana Puspita Riana Puspita, Riana Rini Halila Nasution Rini Halila Nasution Rizkha Rida Roswani Siregar Sagala, Muammar Alfin Saidan Sany Lubis Saktisahdan, T. Jukdin Saktisahdan, Tengku Jukdin San Lilandana Siregar Silaban, Donni Simanullang, Irwan Prasetya Simanullang, Sanco Simon Petrus H Simorangkir Simon Petrus Simorangkir Simorangkir, Simon Petrus Siregar, Masdania Zurairah Siregar, San Lilandana Situmorang, Eva Vivi Aniceta Soaloon, Humala Raja Suherman . Suita, Diana Sukarsih Syafputra, Nanda Syafrida Hanum Syahputra, Muhammad Novrin Rizky T. Jukdin Saktisahdan Tengku Jukdin Saktisahdan Tri Hadiyatna, Jaka Trisilo, Muji Uun Novalia Harahap Yetti Meuthia Hasibuan Yoga Tri Nugraha Yudi Daeng Polewangi Yuri Dwi Lianto