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All Journal Media Teknik Sipil Jurnal Dedikasi Jurnal Gamma Prosiding Semnastek Journal of Energy, Mechanical, Material and Manufacturing Engineering BERDIKARI : Jurnal Inovasi dan Penerapan Ipteks J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Journal of Community Service and Empowerment JINAV: Journal of Information and Visualization Proceeding Biology Education Conference ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Teknik Mesin Sinergi J-Proteksion : Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin
Ali Mokhtar
Universitas Muhammadiyah Malang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Catalityc Converter Jenis Katalis Pipa Tembaga Berlubang Untuk Mengurangi Emisi Kendaraan Bermotor Ali Mokhtar
Jurnal Gamma Vol. 8 No. 1 (2012): September
Publisher : Jurnal Gamma

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Abstract

Catalityc Converter Jenis Katalis Pipa Tembaga Berlubang Untuk Mengurangi Emisi Kendaraan Bermotor Ali MokhtarStaf Pengajar Jurusan Teknik Mesin, Fakultas TeknikUniversitas Muhammadiyah MalangEmail : alimokhtar011@gmail.com, balimokhtar06@yahoo.co.idABSTRACTDecreased levels of exhaust emissions are influenced by the catalyst material and shape of the catalyst, the catalyst model of perforated pipes showed oxidation and reduction process goes well, it is shown that the levels of CO2 decreased by 49.7338%, while CO emissions fell by 36.904% and the emissions HC decreased by 28.354%. In general installation catalityc hollow pipe catalytic converter type can reduce exhaust emissions compared with using ctalityc converter.Key Word : copper pipe perforated catalyst
Catalityc Converter Jenis Katalis Plat Tembaga berbentuk Sarang Lebah Untuk Mengurangi Emisi Kendaraan Bermotor Ali Mokhtar
Jurnal Gamma Vol. 10 No. 1 (2014): September
Publisher : Jurnal Gamma

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Catalityc Converter Jenis Katalis Plat Tembaga berbentuk Sarang Lebah Untuk Mengurangi Emisi Kendaraan BermotorCatalityc Converter Type Catalyst Copper Plate-shaped Honeycomb To Reduce Vehicle EmissionsAli MokhtarJurusan Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Malangemail: alimokhtar011@gmail.com, alimokhtar06@yahoo.co.idABSTRACTDecreased levels of exhaust emissions on Catalityc converter is affected by the material and shape of the catalyst, the catalyst honeycomb-shaped copper plate shows the oxidation and reduction process goes well, it is shown that the levels of CO emissions decreased by 41.85%, whereas for HC emissions decreased by 29.16%, and CO2 emissions fell by 12.88%. In keselurahan Catalityc converter mounting plate type copper catalyst honeycomb models can reduce exhaust emissions compared with using ctalityc converter.Keywords: Honeycomb catalystABSTRAKPenurunan kadar emisi gas buang pada catalityc converter dipengaruhi oleh bahan katalis dan bentuk katalis, katalis plat tembaga berbentuk sarang lebah menunjukkan proses oksidasi dan reduksi berjalan dengan baik, hal ini ditunjukkan dari kadar emisi CO yang turun sebesar 41,85 % , sedangkan untuk emisi HC turun sebesar 29,16 %, dan emisi CO2 turun sebesar 12,88 %. Secara keselurahan pemasangan catalityc converter jenis katalis plat tembaga model sarang lebah dapat menurunkan emisi gas buang dibanding tanpa menggunakan ctalityc converter.Kata Kunci : Katalis sarang lebah
Spider Web Shape of Brass Catalytic Converter for Reducing Exhaust Gas Emission Heni Hendaryati; Ali Mokhtar
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 2 No. 1 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v2i1.4902

Abstract

The rapid increase of the number of motor vehicles, especially motorcycles, makes serious problem caused by the pollution from gas emission of fossil fuel combustion. The problems related to human health and the erosion on ozone layer is credited to its gas emission. Several dangerous and toxic gasses such as Hydrocarbon (HC), Carbon Monoxide (CO), and Nitrogen Oxide (NOx), Sulphur Dioxide (SO2), and Lead (Pb) are emitted during IC engine operation.To manage those dangerous gasses, catalytic converter which converts the gasses into more eco-friendly CO2H2O and N2 may be employed. In this research, a specially designed catalytic converter made from brass (CuZn) wire in the form of spider web pattern was fitted into exhaust system of a standard motorcycle. The performance of the converter for several engine rotation speeds was examined by measuring CO and HC of exhaust by using Gas Analyzer.By comparing the exhaust of a standard exhaust system and modified exhaust system (fitted with converter), it can be concluded that the converter was able to decrease the exhaust emission gas. For HC content, the percentage of decrease was as much as 36,88 % for converter fitted exhaust system compared to 61.12% for standard one. For CO content, the decrease percentage was 19.90% compared to 80.10% for standard one.
A Honeycomb-Shaped Brass Plate Catalyst to Reduce Motor Vehicle Emissions Ali Mokhtar; Ali Saifullah; Andinusa Rahmandhika
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 6 No. 1 (2021)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v6i1.15532

Abstract

The increasing number of motorized vehicles has a direct impact on exhaust gas air pollution. The air pollution in urban areas is dominated by motorized vehicle emissions, along with pollution problems. This study aims to reduce motor vehicle emissions by using a catalytic converter design made from a brass plate catalyst in the shape of a honeycomb. Honeycomb-shaped brass is suitable for catalysts in the catalytic converter. Besides being easy to obtain and cheap in price, the catalyst can reduce and oxidize exhaust gases well, making it suitable as a catalyst material. The method used in this research is the experimental method. It is started from the design of the catalytic converter house and determining the type of catalyst to the process of making the catalytic converter with a honeycomb-shaped brass plate. Then, testing to determine the emission of exhaust gases produced is required. The last step is to compare it without using a catalytic converter or standard conditions. From the results of the emission test, it was found that the use of a catalytic converter made from a brass plate catalyst in the shape of a honeycomb can reduce HC and CO emissions, while CO2 emissions have increased. A decrease in HC gas emissions by 19.1% for a single catalytic converter and 33.7% for a dual catalytic converter is better compared to without using a catalytic converter or standard conditions. Reduced CO gas emissions by 23.8% for a single catalytic converter and 43.1% for a dual catalytic converter are compared to without using a catalytic converter. Meanwhile, CO2 gas emissions increased by 60.7% for a single catalytic converter, and 81.6% for multiple catalytic converters are compared without using a catalytic converter. This is a result of the addition of oxygen to the oxidation process that running smoothly.
The Role of Flue Gas Inhibitor on Stabilizing Heptane Flame in Meso Scale Combustor Achmad Fauzan Hery Soegiharto; Ali Mokhtar; Sudarman; Satworo Adiwidodo
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 6 No. 2 (2021)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v6i2.19458

Abstract

Mesoscale combustor is one of the components that serves to generate heat on a micro power generator. As one of the components of a micro power generator, meso scale combustor serves to supply heat through the combustion process. The stability of the flame in the combustion chamber meso scale combustor is influenced by the temperature of the combustion chamber. One way to maintain a high temperature in the combustion chamber is to insert a flue gas stainless steel mesh resistor.. This research aims to prove the role of flue gas mesh resistors in stabilizing the flame on the meso scale combustor... The heptane liquid fuel flame was successfully stabilized at an equivalence ratio of ɸ 0.81 – 1.29 and a reactant flow velocity of 26.12 – 36.83 cm/s. The higher the rate of reactant flow, the higher the flame temperature until it reaches 502ºC. Combustor with flue gas mesh resistor is 10 mm away has a flammability limit that is not wider than a combustor without flue gas mesh resistor.
STUDI POTENSI PEMBANGKIT TENAGA AIR DI DESA BUMIAJI KOTA BATU Sudarman Sudarman; Samin Samin; Ali Mokhtar
Prosiding Semnastek PROSIDING SEMNASTEK 2014
Publisher : Universitas Muhammadiyah Jakarta

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Studi potensi pemanfaatan sumberdaya air di desa Bumiaji, Kota Batu, Jawa Timur telah dilakukanuntuk perencanaan dan perancangan pembangkit listrik tenaga hidro skala mikro atau yang dikenalsebagai  Pembangkit  Listrik  Tenaga  Mikrohidro  (PLTMH).  Pembangkit  Listrik  Tenaga  MikroHidro  (PLTMH)  adalah  pembangkit  listrik  yang  memanfaatkan  aliran  sungai  tanpa  membuatbendungan  besar,  oleh  karena  itu  PLTMH  biasanya  memanfaatkan  aliran  anak-anak  sungai  atausaluran irigasi. Hasil studi potensi ini menghasilkan debit berkisar ant ara 200 sampai 400 liter perdetik dan tinggi jatuhan air yang dapat dibangun antara 3 sampai 5 meter. Dengan demikian, dayayang  dapat  dibangkitkan  sekitar  10  s/d  26  kW  atau  kurang  lebih  menghasilkan  enerji  sebesar96.000 kWh.
Implementasi Pendekatan Saintifik dalam Pembelajaran di Pendidikan Dasar di Malang Moch. Agus Krisno Budiyanto; Lud Waluyo; Ali Mokhtar
Proceeding Biology Education Conference: Biology, Science, Enviromental, and Learning Vol 13, No 1 (2016): Prosiding Seminar Nasional XII Biologi
Publisher : Universitas Sebelas Maret

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The scientific approach is believed to be the golden bridge and the development of attitudes, skills, and knowledge of learners. Implementation of the scientific approach consists of five learning experiences are: observing, questioning, experimenting, associating, and communicating. The objective of this study was to determine the Implementation of Scientific Approach to Learning in Elementary Education Malang. The design study is cross sectional, st udy sample consisted is 10 Natural Sciences Teachers of Elementary School and 10 Natural Sciences Teachers of Junior High School taken by simple random sampling. Data collection method used was a questionnaire, observation, and interviews, while the data analysis methods used are 2 independent samples t-test. The results showed that; 1) a score average knowledge in the scientific approach to learning for Natural Sciences Teachers of Elementary School at 69.5 while for Natural Sciences Teachers of Junior High School at 78.5, 2) a score average skills in the scientific approach to the implementation of learning for Natural Sciences Teachers of Elementary School at 70.0 while Natural Sciences Teachers of Junior High School at 81.0, 3) there are significant differences in the scientific approach to knowledge for learning among Natural Sciences Teachers of Elementary School and Natural Sciences Teachers of Junior High School (t-hit > t-tab0,01, 4.407 > 2.878), and 3) there is a significant difference approach implementation skills scientific learning among Natural Sciences Teachers of Elementary School and Natural Sciences Teachers of Junior High School (t-hit > t-tab0,01, 33.033 > 2.878). From the results of such research can be concluded that implementation of the research results Scientific Approach in Education in Primary Education Malang different between Elementary School and Junior High School Malang.Keywords: Scientific Approaches, Learning, Primary Education, Elementary Schools, Junior High Schools
Analisis Potensi Sampah Plastik sebagai Bahan Bakar PLTSa Memanfaatkan Teknologi Siklus Rankine Organik Andinusa Rahmandhika; Daryono Daryono; Ali Mokhtar; Yepy Komaril Sofi'i
Jurnal Teknik Mesin Sinergi Vol 20, No 1 (2022): April 2022
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.625 KB) | DOI: 10.31963/sinergi.v20i1.3396

Abstract

Kelangkaan energi di Indonesia diakibatkan oleh semakin menipisnya suplai energi fosil mengharuskan pemerintah untuk mendapatkan energi alternatif, salah satunya pada energi sampah. Salah satu cara pemanfaatannya adalah dengan pembangunan pembangkitan listrik skala kecil dan peningkatan efisiensinya. Pada penelitian ini, dilakukan analisa perhitungan potensi nilai kalor sampah plastik serta simulasi mini powerplant menggunakan software Cycle Tempo. Pemanfaatan uap panas hasil pembakaran sampah sebagai sumber panas PLTSa. Komponen dari sistem pembangkit daya tersebut meliputi pompa, boiler, turbin, dan kondensor. Variasi tekanan dan temperature dilakukan untuk mendapatkan nilai optimal, sehingga didapatkan daya dan efisiensi paling tinggi. Hasil penelitian didapatkan bahwa nilai daya dan efisiensi tertinggi pada laju aliran massa 35 kg/s dan suhu keluaran boiler 125 0C, yaitu 2,86 kW dan 45,52%. Sementara pada optimasi tekanan keluaran pompa, didapatkan nilai daya tertinggi sebesar 2902 kW pada tekanan 35 bar. Penelitian ini dimaksudkan sebagai langkah awal pemanfaatan sampah plastik dalam rangka mengurangi kerugian kalor dan meningkatkan efisiensi.
Pengaplikasian Sistem Bio-Filter Air pada Fasilitas Protokol Kesehatan SDI Surya Buana Malang Andinusa Rahmandhika; Ali Mokhtar
J-Dinamika : Jurnal Pengabdian Masyarakat Vol 8 No 2 (2023): Agustus
Publisher : Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/j-dinamika.v8i2.3800

Abstract

Kurikulum berwawasan lingkungan dicanangkan sebagai usaha untuk memberikan kesadaran lingkungan hidup pada masyarakat. Oleh karena itu, kesadaran lingkungan harus dibentuk sejak dini sehingga generasi muda kita mempunyai kedisiplinan dalam mengelola dan memanfaatkan sumber daya alam yang ada di lingkungan sekitarnya. Untuk usaha ini, pemerintah Indonesia mencanangkan program sekolah Adiwiyata untuk mendidik siswa berwawasan lingkungan. Metode yang dilakukan untuk melaksanakan pengabdian ini diawali dengan melakukan observasi potensi yang dimiliki sekolah untuk melaksanakan sekolah Adiwiyata dan wawancara dengan kepala sekolah untuk mengetahui pemanfataan lingkungan yang ingin dilakukan sekolah. Bio-filter air merupakan perangkat yang digunakan untuk menjernihkan air dengan memanfaatkan sumber daya yang ada di alam. Sumber daya yang digunakan sebagai bio-filter air ini adalah bebatuan yang memiliki sifat menyerap bakteri dan memurnikan mineral yang ada di air. Bio-filter yang digunakan untuk penjernihan air ini dibuat sederhana agar sekolah bisa dengan mudah memanfaatkan dan merawat bio-filter air ini.
Analisis variasi pipa penstock terhadap kecepatan inlet turbin pada PLTMH Boonpring menggunakan CFD Rahmandhika, Andinusa; Mokhtar, Ali; Adi Putra, Bagus; Achmadi, Sentot
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 5 No. 1 (2024): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v5i1.4760

Abstract

The development of renewable energy is a necessity in order to reduce the consumption of fossil energy. One of the alternative technologies to obtain sustainable energy resources is to use a Micro Hydro Power Plant (PLTMH). In order to obtain high-efficiency power, it is necessary to analyze the maximum head and discharge values. In this study, an analysis of variations in the design of the penstock pipe from the forebay was carried out to obtain the highest velocity value for rotating the water turbine. The method used in this research is a simulation using ANSYS Fluent software. Based on the results obtained, the highest velocity values were obtained for penstock numbers 2 and 4. Pipe elevation causes the flow velocity to increase smoothly. The branching at the inlet does not affect the velocity value but increases the possibility of a vortex which is detrimental to the flow leading to the turbine.
Co-Authors Achmad Fauzan Hery Adi Putra, Bagus Ahmar, Ansari Saleh Ali Saifullah Andinusa Rahmandhika Daryono Daryono Defantyan, Etantyo Daffa Dini Kurniawati Heni Hendaryati Iis Siti Aisyah Ilyas Masudin Lud Waluyo Lutfi, Vicky Thorikhotul Machmud Effendy Machmud Effendy Moch Agus Kresno Moch Agus Kresno, Moch Agus Moch. Agus Krisno Budiyanto muhammad irfan Muhammad Irfan Murjito Murjito Nur Hasanah Pringga P, Okta Samin Samin Satworo Adiwidodo Sayid Muhammad Sayid Muhammad, Sayid Sentot Achmadi Sudarman . Sudarman . Sudarman Sudarman Sudarman Sudarman Sujono Sujono Suwignyo . Suwignyo, Suwignyo Yepy Komaril Sofi’i