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All Journal Jurnal Teknik Sipil Rekayasa Mesin Media Mesin: Majalah Teknik Mesin ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Rekayasa Material, Manufaktur & Energi RELE: Rekayasa Elektrikal dan Energi Jurnal Teknik Elektro Martabe : Jurnal Pengabdian Kepada Masyarakat Vocatech : Vocational Education and Technology Journal Jurnal Ilmiah Teknik Mesin "MEKANIK" Motor Bakar : Jurnal Teknik Mesin Ihsan: Jurnal Pengabdian Masyarakat Jurnal Surya Teknika Jurnal Koridor Budapest International Research in Exact Sciences (BirEx Journal) International Journal Of Science, Technology & Management (IJSTM) Jurnal MESIL (Mesin Elektro Sipil) Poltekita: Jurnal Pengabdian Masyarakat ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Proceeding International Seminar of Islamic Studies Prosiding Seminar Nasional Teknik UISU (SEMNASTEK) International Journal of Economic, Technology and Social Sciences (Injects) Jurnal Polimesin Sinonim : Journal of Language and Literature Journal of Innovation and Community Engagement
Sudirman Lubis
Universitas Muhammadiyah Sumatera Utara
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy 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 Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Transportation Other

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Karakteristik Unjuk Kerja 2 Pompa Sentrifugal Dengan Susunan Seri Sebagai Turbin Pat Lubis, Sudirman; Siregar, Irpansyah; Siregar, Ahmad Marabdi
Rekayasa Material, Manufaktur dan Energi Vol 3, No 2: September 2020
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v3i2.5270

Abstract

The pump is a device used to move fluid from one place to another through a media pipe or channel. The energy in the fluid is produced from the impeller which converts the kinetic energy (velocity) of the liquid into potential (dynamic) energy. Besides being used to move fluid (fluid) at this time the pump can also be used as a turbine by changing the working principle of the pump by giving a drop of water at an altitude to rotate the impeller on the pump so that the pump can operate upside down or called a pump as turbine), in this study the impeller on the pump as a turbine is driven by a water flow or water pressure that is large enough, the water flow is sourced from two centrifugal pumps with a series arrangement that functions as a driving force or fluid distributor which is assumed to be a high water fall or head. The use of centrifugal pumps with a series arrangement is so as to produce a large head to get a high water fall or a maximum head for turning a pump as a turbine. This study uses an experimental method that is using two centrifugal pumps as a fluid distributor and one pump that is used as a turbine and uses a variation of 5 watt and 10 watt light bulb. From the calculation of the suction pump and pump as a turbine without using a light bulb pump speed namely 920.5 rpm and the specific speed of the turbine produced is 76.61 rpm. by using a 5 watt light bulb load the pump rotation speed is 553 rpm and the specific turbine speed produced is 44.24 rpm, using a 10 watt light bulb load the pump rotation speed is 335 rpm and the specific turbine speed produced is 26.8 rpm. The greater the value of the pump head, the resulting water discharge will be smaller and vice versa, the size and size of the pump head obtained is also influenced by the presence of load on theturbine.
Studi Eksperimental Kekuatan Struktur Atap Berongga Berbahan Komposit Serat Alam Sudirman Lubis; Munawar A Siregar; Edi Sarman Hasibuan; Irpansyah Siregar
SURYA TEKNIKA Vol 9 No 2 (2022): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v9i2.4306

Abstract

Komposit adalah suatu bahan yang terbentuk dari gabungan dua bahan atau lebih sehingga bahan komposit yang dihasilkan memiliki sifat dan karakteristik mekanik yang berbeda dengan bahan penyusunnya, serat yang digunakan dalam komposit matrik dibedakan menjadi dua yaitu serat alam dan serat sintetik. Sedangkan padi dan nanas merupakan tumbuhan yang banyak dijumpai di seluruh nusantara khususnya indonesia, sehingga hasil alam seperti beras dan nanas di indonesia sangat melimpah. Sekam padi merupakan bahan alternatif yang dapat digunakan dalam pembuatan material komposit, demikian pula serat daun nanas yang akan digunakan sebagai bahan atap merupakan cara yang baik untuk mengurangi evolusi limbah alam seperti sekam padi dan serat daun nanas. . Pada penelitian ini, penulis akan melakukan percobaan kekuatan mesin berbasis komposit menggunakan sekam padi dan serat daun nanas khususnya pada pembuatan atap hollow. Dari uji tarik yang telah dilakukan pada komposit serat sekam padi dan serat daun nanas dengan perbandingan komposisi resin 70% : 30% sekam padi dan daun nanas, 80% : 20% dan 90% : 10%. Terlihat komposisi bahan 90% : 10% mendapatkan nilai lebih tinggi yaitu 101,4 kgf/mm2, sedangkan untuk uji perbandingan perbandingan komposisi resin adalah 70% : 30% sekam padi dan serat daun nanas 80% : 20% dan 90% : 10%. Terlihat bahwa komposisi material 90% : 10% mendapatkan nilai yang lebih tinggi yaitu 1246,26 kgf/mm2.
Naratif Trauma dan Memori Kolektif: Pembacaan Psikoanalitik pada Novel Pasca-Konflik Lubis, Sudirman
Sinonim : Journal of Language and Literature Vol. 2 No. 02 (2024): Sinomim Journal of Language and Literature
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/sinonim.v2i02.441

Abstract

Penelitian ini mengkaji naratif trauma dalam novel pasca-konflik dengan pendekatan psikoanalitik untuk mengungkap bagaimana trauma individu dan kolektif digambarkan serta dibangun dalam teks sastra. Fokus penelitian ini adalah pada bagaimana teknik naratif, seperti fragmentasi waktu, pergeseran fokalisasi, dan penggunaan arsip, digunakan oleh penulis untuk menggambarkan pengalaman traumatik yang sering kali terpecah, terputus, dan tidak dapat disampaikan dengan cara yang linear. Memori kolektif berfungsi sebagai mekanisme penting dalam proses rekonsiliasi dan pemulihan pasca-konflik, dan narasi ini berperan dalam memfasilitasi komunikasi antara trauma individu dan ingatan sosial yang lebih luas. Dengan menganalisis tiga novel pasca-konflik yang berlatar perang dan krisis sosial di Asia Tenggara, penelitian ini menemukan bahwa teknik-teknik seperti fragmentasi waktu dan fokalisasi berganda menciptakan ruang bagi pembaca untuk memahami bagaimana ingatan kolektif dibangun melalui kesaksian bersama. Penggunaan arsip (seperti foto, dokumen, dan surat) dalam teks menggambarkan bagaimana memori dapat dikonstruksi melalui materi yang dapat diakses dan diperbarui secara sosial. Sementara itu, kesunyian dalam teks—baik melalui ruang kosong dalam narasi maupun ketidakmampuan untuk menggambarkan pengalaman kekerasan secara verbal—menjadi simbol dari trauma yang tidak dapat sepenuhnya diungkapkan, namun tetap hadir dalam bentuk yang tersembunyi. Penelitian ini juga menyarankan bahwa naratif trauma pasca-konflik berfungsi bukan hanya sebagai rekonstruksi kekerasan masa lalu, tetapi juga sebagai mekanisme berduka yang memungkinkan masyarakat untuk bernegosiasi dengan ingatan kolektif yang sering kali penuh dengan ketegangan. Dengan demikian, temuan ini memberikan wawasan baru tentang bagaimana sastra pasca-konflik berperan dalam menciptakan ruang untuk rekonsiliasi memori dan membantu masyarakat untuk merawat trauma bersama yang dihadapi oleh individu dan kelompok.
Penerapan Teknologi Skimming dan Bioremediation pada Instalasi Pengelolaan Air Limbah di PT. Waruna Shipyard Indonesia Siregar, Munawar Alfansury; Damanik, Wawan Septiawan; Lubis, Sudirman; Nasutioon, Arya Rudi; Arif, Arfian
Poltekita: Jurnal Pengabdian Masyarakat Vol. 4 No. 3 (2023): Juli-September
Publisher : Pusat Penelitian & Pengabdian Masyarakat Poltekkes Kemenkes Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33860/pjpm.v4i3.1806

Abstract

Water pollution causes environmental damage and is very detrimental to living things. This activity aims to improve the performance of the Wastewater Management Installation (WWTP) which functions to reduce pollutant levels in the waters. Through the collaboration of the UMSU Faculty of Engineering with PT. Waruna Shipyrad Indonesia (WSI), collaboration was also carried out to improve the performance of the wastewater management system. Wastewater management methods are carried out by applying skimming machine technology, and several sensors for the physical properties and composition of water, as well as using remediation of good bacteria from the laboratory. 6 WWTP ponds were implemented, each with dimensions of 3.7x2.8x2.17 m. The skimming machine is designed to use a drum, and the bacteria from the remediation process will suppress the growth of bacteria that damage the environment. The volume of water entering the reservoir is around 207,200 kg/m3 perweek or 207.2 Liters/week. The results of applying this technology obtained an average amount of oil taken every 2 days reaching 600 mL. The average water quality is 6-8 with a pH standard of 6-9, a COD value of 47.8 mg/L with a quality standard of 100 mg/L, and a BOD value of 21.1 mg/L with a quality standard of 30 mg/L.
Impact of welding steel rod rotor bars on ripple mill efficiency and cost-effectiveness at Sumatera Jaya Agro Lestari Sawit Coconut Plant Lubis, Sudirman; Pane, Rafsanzani; Siregar, Irpansyah
Jurnal Polimesin Vol 21, No 6 (2023): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i6.4507

Abstract

PT. Sumatera Jaya Agro Lestari is an industry that is moving in the field of Coke Processing, some long processes that include Loading Ramp, Sterilizer,Trheser, Digester, Pressing, Clarification, and Kernel Plant stations, some problems that occur in the kernel stations mainly to Efficiency results on the Ripple Mill machine, not out of the Operation and Maintenance Standards performed by Using the achievement of the target of the Cernel by the efficiency standard of 96%, on Ripple mill machines often occur cworn outes on Stell Rod due to the input of the ripple Mill Too Over Load, and the amount of nut less mature, for that was done a study on Stel Rod that has already Worn out by performing the Rewelding Method, i.e. the addition of the meat of the steel Rod to 5 mm of the surface of the Rotor-Disc to obtain the maximum Effectiveness result. The steel rod is the most important part of the mill ripple machine consisting of stone mills that move automatically so that it will not reach the maximum efficiency result at mill mills ripple rod. With the welding method, the surface of the welded meat is applied to a steel rod with a thickness of 5mm to 7mm using the MWH 500 type electrode to form the return of the base of the new steel rods surface where the strength of the electrodes and the formation of the surface are correct. The results can be inferred from the efficiency of the impact of welding steel Rod averages 93.38% achieving a very high efficiency.
PLTS 200 Wp to Meet Energy Needs at the Taqwa Muhammadiyah Mosque, Sei Litur Village, Sawit Sebrang Langkat District Partaonan Harahap; Irfan Nofri; Sudirman Lubis
Journal of Innovation and Community Engagement Vol. 1 No. 1 (2021)
Publisher : Faculty of Smart Technology and Engineering, Universitas Kristen Maranatha, Bandung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jice.v1i1.3380

Abstract

At the Taqwa Muhammadiyah Mosque, a local place of worship, the power blackout is becoming very troublesome. On one side of the village where the research was conducted, the light intensity was high enough so that it is very good to be used as a source of renewable energy, namely solar panels or better known as PLTS. Method used in this research is experiment which is fully functional to control the implementation of the solar panel for electricity supply for the Mosque everyday activity Based on the results of measurements and calculations, the 200 Wp solar panel, when the weather is sunny, will be able to charge a battery by 68.2% or 87.2 Watts. In using the battery, the efficiency factor of the battery must be considered because it cannot be operated until all power is used up. Battery Capacity is 754.7 Ah and is able to supply DC lamps for 1 day and is able to supply AC loads for 1.02 day. So in 11 hours (lowest data) the 200WP solar panel is able to charge a battery with a capacity of 100Ah at 80% of the full battery capacity. Keywords: generator; PLTS; solar cell
Evaluasi Kinerja Sistem PLTS 100 Wp dan 200 Wp Dalam Memenuhi Kebutuhan Energi Beban Skala Kecil Irfan Nofri; Abdul Aziz; Rafsanzani Pane; Sawirman; Sudirman Lubis; Iqbal Tanjung; Muharnif M; Muhammad Husin Gultom
Jurnal MESIL (Mesin Elektro Sipil) Vol. 7 No. 1 (2026): Jurnal MESIL (Mesin Elektro Sipil)
Publisher : Cered Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jm.v7i1.1589

Abstract

Penelitian ini bertujuan untuk menganalisis dan membandingkan kinerja panel surya 100 Wp dan 200 Wp berdasarkan daya keluaran dan kemampuan pengisian baterai pada sistem Pembangkit Listrik Tenaga Surya (PLTS) skala kecil. Metode yang digunakan adalah eksperimen lapangan dengan melakukan pengukuran intensitas cahaya matahari, tegangan, dan arus selama 7 hari berturut-turut dengan interval satu jam. Data yang diperoleh digunakan untuk menghitung daya keluaran serta mengevaluasi performa sistem dalam kondisi operasional nyata. Hasil penelitian menunjukkan bahwa panel surya 200 Wp menghasilkan daya maksimum sebesar 120 W, sedangkan panel 100 Wp hanya sebesar 52 W. Selain itu, panel 200 Wp mampu mengisi baterai hingga 68% per hari, sedangkan panel 100 Wp hanya mencapai 36%. Kemampuan suplai energi juga menunjukkan bahwa panel 200 Wp mampu memenuhi kebutuhan beban lebih dari 24 jam, sedangkan panel 100 Wp hanya sekitar 12 jam. Berdasarkan hasil tersebut, dapat disimpulkan bahwa panel surya 200 Wp memiliki kinerja yang lebih efektif dan efisien dibandingkan panel 100 Wp dalam memenuhi kebutuhan energi pada sistem PLTS skala kecil.
PEMBERDAYAAN MASYARAKAT PASCA COVID 19 MELALUI BUDIDAYA JAMUR TIRAM Alridiwirsah Alridiwirsah; Muhammad Alqamari; Abdul Rahman Cemda; Muhammad Said Siregar; Sudirman Lubis
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 5, No 4 (2022): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v5i4.1254-1259

Abstract

Jamur tiram merupakan bahan makanan bernutrisi dengan kandungan protein tinggi, kaya vitamin dan mineral, rendah karbohidrat, lemak dan kalori. Jamur ini memiliki kandungan nutrisi seperti vitamin, fosfor, besi, kalsium, karbohidrat, dan protein. Media yang umum dipakai untuk membiakkan jamut tiram adalah serbuk gergaji kayu. Permasalahan pada mitra mempunyai kendala usaha pada kapasitas produksi hanya 120 baglog/hari dan ini belum maksimal untuk memenuhi permintaan pasar baglog di sekitar Jepara. Selain itu proses pembuatannya masih sangat konvensional baik pada proses pemadatan, sterilisasi tanpa kontrol suhu uap panas, dan proses inokulasi kurang steril karena dilakukan pada ruang terbuka serta tempat penyimpanan baglog yang tidak efisien karena hanya ditaruh dilantai rumah tinggal. Solusi dan target luaran yang diberikan untuk mitra adalah penyuluhan manajemen usaha yang baik, pembuatan alat pemadatan baglog mekanis, pembuatan alat sterilisasi yang lebih besar kapasitasnya dan dilengkapi dengan kontrol suhu otomatis, dan ruangan steril untuk inokulasi. Tujuan Program pengabdian ini adalah pengabdi membantu usaha budidaya jamur tiram ditengah pandemi covid 19 di Kelurahan Denai, Kecamatan Medan Denai, Kota Medan. Kegiatan pelatihan ini dilakukan dengan pembekalan, demonstrasi cara budidaya jamur tiram putih dimulai dengan persiapan media tanam, pencampuran media, fermentasi, pengisian media dalam baglog, sterilisasi, inokulasi bibit, inkubasi, pemeliharaan dan panen serta pemberian alat produki baglog.
Optimasi Kapasitas PLTS Berdasarkan Ketersediaan Lahan Rooftop Menggunakan Helioscope Nofri, Irfan; Rohana, Rohana; Lubis, Sudirman; Nasution, Sawirman
SURYA TEKNIKA Vol 13 No 1 (2026): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v13i1.11472

Abstract

The increasing demand for electrical energy in buildings requires the utilization of renewable energy as an alternative power source. One of the applicable solutions is the implementation of rooftop photovoltaic (PV) systems. This study aims to optimize the rooftop PV system capacity based on the available installation area at the BKD Building of Tebing Tinggi City using Helioscope software. The research method was carried out through building electrical load data collection, electrical energy requirement analysis, PV system capacity calculation, installation area requirement analysis, rooftop simulation using Helioscope software, and simple economic analysis. The results showed that the total electrical energy demand of the building was 304,212 Wh/day, with motor loads dominating energy consumption by 91% of the total electrical usage. The required PV system capacity to supply the entire building load was 82.393 kWp with a required installation area of 552.08 m². Based on the Helioscope simulation results, the available effective rooftop area was only 346.8 m², indicating that the PV system for supplying the entire building load was not feasible to implement. The optimization results showed that the most optimal PV configuration was supplying electronic and lighting loads with a capacity of 7,777.15 Wp using 79 solar modules and requiring an installation area of 52.93 m². The economic analysis indicated that the proposed PV system has a simple payback period of approximately 11 years, demonstrating its feasibility for long-term implementation in government buildings. This study demonstrates that rooftop validation using Helioscope software is essential to produce a realistic rooftop PV design that matches actual building conditions.
Co-Authors - Nurhayati ., Andri Abdul Aziz Ahmad Marabdi Siregar Alridiwirsah Arfis A Arif, Arfian Arya Rudi Nasution Balisranislam, Balisranislam C A Siregar Candra A Siregar Cemda, Abdul Rahman Chandra A Siregar Chandra A. Siregar Chandra A. Siregar Cholish Cholish Faisal Irsan Pasaribu Faisal Lubis Faisal Lubis Farel H Napitupulu Harahap, Partaonan Hasibuan, Edi Sarman Hasrudy Tanjung, Hasrudy Herawati, Henny Ilmi Abdullah Indra R Harahap Iqbal Tanjung Irfan Nofri Irpansyah Siregar Khairul Umurani Muhammad Alqamari Muhammad Arif Muhammad Firza Alpi, Muhammad Firza Muhammad Husin Gultom Muhammad Said Siregar Muharnif M Munawar A Siregar Munawar A Siregar Munawar A Siregar Munawar A Siregar Munawar A Siregar Munawar A. Siregar Munawar Alfansury Airegar Nasution, Sawirman Nasutioon, Arya Rudi Oktrialdi, Benny Partaonan Harahap Puja Rizqy Ramadhan Rafsanzani Pane Rahmatullah . Rimbawati Rini Astuti RITONGA, RAHMAT ROHANA ROHANA Saragi, Jandri Fan HT Sawirman Siregar, C A Siregar, Chandra A Siregar, Munawar Alfansury Siregar, Rahmad Syukur Tulus Burhanuddin Sitorus Wawan S Damanik Wawan S Damanik Wawan S Damanik Wawan S. Damanik Wawan Septiawan Damanaik Wawan Septiawan Damanik Zulkifli Siregar Zulkifli, Zulkilfli Siregar