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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

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.

Media Pembelajaran Digital Berbasis Macromedia Flash untuk Mata Pelajaran Fisika tingkat SMP Andinusa Rahmandhika; Heni Hendaryati; Ary Dwi Astuti
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol 7 No 1 (2022): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v7i1.2295

The development and improvement of teaching innovation aim to bring an enjoyable, joyful, active, and creative atmosphere for students to increase and improve their achievement. Teaching media that support student's creativity and critical thinking are needed to facilitate teachers presenting the learning material. Information and Communication Technology (ICT) can introduce media to increase students' learning motivation. This program instructs teachers in using Macromedia flash software to create learning media applications for the physics units. It was conducted in SMP Muhammadiyah 6 Dau Malang. An instrument to observe the teaching situation is an interview with the teacher. Information from the interview, students have high motivation during their practice in the lab, but the opposite occurs in the class. The result of this program is an attractive teaching media application created by using Macromedia Flash software.

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

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

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.

PENINGKATAN EFEKTIVITAS DISTRIBUSI PASIR PADA UMKM BATU AGUNG PODOMORO MENGGUNAKAN SCREW CONVEYOR Andinusa Rahmandhika; Herry Suprianto
BUDIMAS : JURNAL PENGABDIAN MASYARAKAT Vol 5, No 2 (2023): BUDIMAS : Jurnal Pengabdian Masyarakat
Publisher : LPPM ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/budimas.v5i2.8996

Bisnis property adalah lahan yang tepat untuk meningkatkan ekonomi mikro pada masa pandemic saat ini. Selain menjanjikan, hamper dipastikan untuk pelaku usaha dan developer memperoleh profit yang tinggi. Hal tersebut yang kemudian ditangkap UMKM untuk mengembangkan usaha penyuplai bahan bangunan. Salah satunya adalah Batu Agung Podomoro sebagai supplier pasir dan kerikil. Pada pelaksanaannya, diperlukan efisiensi dan efektivitas pekerja pada UMKM tersebut agar proses distribusi pasir berjalan maksimal. Salah satu penyebab kurangnya efektivitas ini adalah proses pemindahan pasir ke mobil pickup yang masih menggunakan tenaga manual. Oleh karena itu, pengabdi berinisiasi untuk memenuhi kebutuhan UMKM dengan merancang desain dan prototype mesin berupa screw conveyor untuk memudahkan pekerja dalam pengangkutan pasir. Pengabdian ini menggunakan metode diskusi untuk penentuan konsep desain alat yang cocok, serta analisis perhitungan dan perancangan tipe screw conveyor yang paling efektif untuk diaplikasikan di lokasi, berdasarkan survey yang telah dilaksanakan sebelumnya. Target luaran yang ingin dicapai adalah peningkatan mobilitas proses distribusi dan waktu yang semakin singkat.

Pengaruh Campuran Minyak Jarak Pagar dengan Dexlite Terhadap Performa Mesin Diesel Andinusa Rahmandhika; Nur Hasanah; Rizqi Arif Viandi; Achmad Fauzan Hery Soegiharto
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 5, No 2 (2024): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v5i2.21068

One of the alternative energy fuels in the transportation sector is biodiesel. Biodiesel made from a mixture of vegetable materials has great potential as an environmentally friendly fuel for diesel engines. This experimental research aims to analyze the effect of using Jatropha curcas (Jatropha curcas Linn) oil on diesel engines. The experiment was carried out using a mixture of Dexlite and pure castor oil (JCO) with varying compositions of JCO 0%, JCO 20%, and JCO 30%. Torque test results against load show an insignificant comparison between Dexlite without mixture and Dexlite with 20% and 30% JCO mixture, especially when loading high using Prony Brake. Although the effective engine power of the three fuel variations does not show significant differences at the same engine speed and load, the use of a mixture of Dexlite and 20% castor oil at an engine speed of 1700 rpm is more effective in improving diesel engine performance and saving fuel. Additionally, fuel consumption decreases as load increases, indicating high efficiency potential. In the context of exhaust gases, the mixture also has the potential to reduce the opacity of diesel engine exhaust gases.

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

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.

Pengaruh Campuran Minyak Jarak Pagar dengan Dexlite Terhadap Performa Mesin Diesel Andinusa Rahmandhika; Nur Hasanah; Rizqi Arif Viandi; Achmad Fauzan Hery Soegiharto
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 5 No. 2 (2024): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v5i2.21068

One of the alternative energy fuels in the transportation sector is biodiesel. Biodiesel made from a mixture of vegetable materials has great potential as an environmentally friendly fuel for diesel engines. This experimental research aims to analyze the effect of using Jatropha curcas (Jatropha curcas Linn) oil on diesel engines. The experiment was carried out using a mixture of Dexlite and pure castor oil (JCO) with varying compositions of JCO 0%, JCO 20%, and JCO 30%. Torque test results against load show an insignificant comparison between Dexlite without mixture and Dexlite with 20% and 30% JCO mixture, especially when loading high using Prony Brake. Although the effective engine power of the three fuel variations does not show significant differences at the same engine speed and load, the use of a mixture of Dexlite and 20% castor oil at an engine speed of 1700 rpm is more effective in improving diesel engine performance and saving fuel. Additionally, fuel consumption decreases as load increases, indicating high efficiency potential. In the context of exhaust gases, the mixture also has the potential to reduce the opacity of diesel engine exhaust gases.

Pengaruh Penambahan Catalytic Converter Berbahan Ceramic Cordierite Honeycomb dan Sponge steel terhadap Emisi Gas Buang Kendaraan Rahmandhika, Andinusa; Mokhtar, Ali; Defantyan, Etantyo Daffa; Lutfi, Vicky Thorikhotul
J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Vol. 8 No. 2 (2024): J-Proteksion
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/jp.v8i2.1429

Peningkatan jumlah kendaraan bermotor mengakibatkan kenaikan polusi udara akibat emisi gas buang. Penelitian ini bertujuan untuk mengkaji penambahan katalisator berbahan keramik cordierite berbentuk sarang lebah dan penambahan spons baja guna menghambat tingginya gas berbahaya yang dilepaskan pada knalpot. Metode yang digunakan dalam penelitian ini adalah metode eksperimental, dimulai dari perancangan converter, pemilihan jenis katalis, hingga proses pembuatan converter berbahan keramik cordierite dan spons baja lebah. Selanjutnya, dilakukan pengujian untuk membandingkan emisi gas buang kendaraan yang menggunakan converter dengan yang tidak menggunakan atau menggunakan knalpot bawaan motor. Parameter yang diukur adalah presentase gas buang CO, CO2, dan HC pada knalpot dengan memvariasikan nilai putaran mesin. Hasil pengujian menunjukkan bahwa penggunaan converter berbahan katalis keramik cordierite dapat menekan peningkatan presentase gas CO, CO2, dan kadar emisi HC yang dilepaskan ke lingkungan pada putaran mesin 1500 – 4500 rpm. Penambahan sponge steel efektif untuk mereduksi gas CO, CO2, dan kadar emisi HC pada putaran mesin rendah, namun tidak maksimal pada rpm tinggi.

Effect of Pouring Temperature Variation on Cooling Rate, Hardness and Microstructure of Al-Zn in Aircraft Structures Pambekti, Arif; Prakoso, Agung; Dinaryanto, Okto; Rahmandhika, Andinusa; Yaqin, Rizqi Ilmal
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 1 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i1.23945

Al-Zn alloys are widely utilized in industries such as automotive, aircraft manufacturing, and advanced military equipment due to their exceptional strength-to-weight ratio. Among various fabrication methods, metal casting is a commonly used technique for producing structural components from these alloys. However, a significant challenge with metal casting is the reduction in mechanical properties compared to the base material before melting. This reduction highlights the need for research to identify the optimal casting conditions, particularly the casting temperature, which plays a crucial role in maintaining and potentially enhancing the material's mechanical properties. Aluminum alloy 7075, known for its high strength, was selected for investigation. According to the Al-Zn phase diagram, the melting point of aluminum alloy 7075, based on the weight percentage specified by the Standard Aluminum Association, is approximately 660°C. Experiments were conducted by varying the pouring temperature during casting in 30°C increments above this melting point. Specifically, the alloy was melted and cast at three different temperatures: 690°C, 720°C, and 750°C. The mold temperature was consistently maintained at 220°C to isolate the effects of the pouring temperature. Results indicate that increasing the casting temperature significantly affects the alloy's microstructure and mechanical properties. As the casting temperature increases, the cooling rate decreases, leading to a finer grain structure. This finer grain size directly contributes to an increase in hardness, suggesting that higher casting temperatures can enhance the mechanical properties of Al-Zn alloys. These findings emphasize the importance of precise control over casting temperatures to optimize the performance characteristics of aluminum alloy 7075 in high-strength applications.

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