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Musthofa, Imron
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ANALISA EFISIENSI LAJU PENDINGINAN REFRIGERAN R-32, R-134A, R410A, DAN LPG PADA SIMULATOR REFRIGERATOR Ivana, Reza Taufiqi; Musthofa, Imron; Putra, Muhammad Rezki Fitri
JTAM ROTARY Vol 5, No 2 (2023): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v5i1.8416

Abstract

Efisiensi sistem refrigeran dengan fungsi sebagai fluida yang menyerap panas dalam sistem sehingga terjadi penurunan suhu  melalui mekanisme evaporasi dan kondensasi. Percobaan ini dilakukan untuk mengetahui refrigeran yang mempunyai dampak laju pendinginan terbaik dengan tingkat temperatur yang berbeda sehingga dapat diamati laju pendinginan dari refrigeran R-134a, R-32, R-410a, dan LPG. Dalam prakteknya menggunakan simulator pendingin sebagai media pembelajaran dalam menerapkan prinsip kerja mesin refrigerasi. Metode penelitian yang dilakukan adalah dengan mengukur temperatur pada waktu 30 detik untuk pengambilan 1 data dan pengambilan data dilakukan selama 300 detik untuk menghasilkan 10 data pada tiap jenis refrigerant pada tekanan 10 Psi. Hasil penelitian menunjukkan refrigerant jenis LPG memiliki tingkat penurunan temperatur paling rendah diantara jenis refrigerant yang lain. Hal ini dikarenakan kinerja LPG dengan ODP sama dengan nol dan nilai GWP rendah. Kesimpulannya sistem pendingin domestik dapat menggunakan refrigeran jenis LPG di untuk penurunan temperatur yang lebih rendah. Refrigerant system efficiency by functioning as a fluid that absorbs heat in the system resulting in a decrease in temperature through evaporation and condensation mechanisms. This experiment was conducted to find out which refrigerant has the best cooling rate effect at different temperature levels so that the cooling rates of R-134a, R-32, R-410a, and LPG refrigerants can be observed. In practice using a cooling simulator as a learning medium in applying the working principles of refrigeration machines. The research method used is to measure the temperature for 30 seconds for 1 data collection and 300 seconds for data collection to produce 10 data for each type of refrigerant at a pressure of 10 Psi. LPG type refrigerant has the lowest temperature drop among other refrigerant types. This is because the performance of LPG with ODP is equal to zero and GWP is low. In conclusion, domestic refrigeration systems can use LPG type refrigerants for lower temperature drops.
Sharia Economic Law Analysis of Mud Bathing in Tiktok Live as Online Begging (Maqashid Syariah Approach) Masyithoh, Luthfiyah Dewi; Amrah, Dwi Putra; Musthofa, Imron
Mu’amalah: Jurnal Hukum Ekonomi Syariah Vol. 3 No. 1 (2024)
Publisher : Institut Agama Islam Negeri Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32332/muamalah.v3i1.7831

Abstract

The phenomenon of live mud bathing content on TikTok has stirred controversy, being perceived as a manifestation of online begging. TikTok’s live streams attract significant viewership, allowing some participants to earn substantial sums in a single session. However, this practice raises ethical concerns and conflicts with the principles of Maqashid Sharia, particularly in upholding human dignity and avoiding harm. This study aims to systematically analyze the issue through the perspectives of Sharia Economic Law and Maqashid Sharia. The research synthesizes relevant references from scholarly books and journals using a literature review methodology. The analysis indicates that live mud bathing content on TikTok primarily results in financial losses rather than benefits for Indonesian viewers. Furthermore, the study proposes recommendations for the Minister of Religious Affairs to ensure that TikTok content in Indonesia adheres to educational standards and local regulations. The novelty of this research lies in its application of Sharia Economic Law and Maqashid Sharia principles to analyze a contemporary digital ethics issue. This study contributes to the discourse on Islamic jurisprudence and digital media ethics by critically evaluating the ethical dimensions of live mud bathing on TikTok. The findings underscore the need for regulatory measures and moral guidelines to mitigate the negative impact of such content, ensuring alignment with societal values and religious principles.
PENGARUH TEMPERATUR WATER COOLANT DAN AIR BIASA TERHADAP KONSUMSI BAHAN BAKAR PADA MESIN BENSIN DAIHATSU TARUNA EFI 1.6 Sukri, Sukri; Syamsuddin, Usman; Musthofa, Imron; Artika, Kurnia Dwi; Merpatih, Merpatih
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 1 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i1.320

Abstract

Vehicles with conventional engines produce heat from combustion in the engine, so that the engine temperature is stable, a radiator water system is needed. The purpose of this study was to determine the effect of water coolant and plain water temperatures on fuel consumption. The method used was to test 3 variations of engine speed, namely 1000, 1500 and 2000 rpm on fuel consumption and engine temperature. The results obtained showed that the average fuel consumption was the same when using water coolant and plain water at an engine speed of 1000 rpm and the water coolant temperature was 3 oC lower than the temperature of plain water. While the average fuel consumption when using water coolant was 17 mL lower than using plain water at engine speeds of 1500 rpm and 2000 rpm, with a temperature drop of 1-3 oC. So, fuel consumption and temperature were lower when using water coolant than when using plain water.
REDESAIN BRAKE COOLING DUCT PADA REM CAKRAM DEPAN SEPEDA MOTOR; ANALISIS PERUBAHAN TEMPERATUR DENGAN METODE COMPUTATIONAL FLUID DYNAMICS (CFD) Sofana , Ilyas; Choirul Anam, Mochammad; Musthofa, Imron
Rekayasa Sistem Energi dan Manufaktur (ReSEM) Vol 2 No 1 (2024): Journal Rekayasa Sistem Energi dan Manufaktur
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/resem.v2i1.21924

Abstract

Brake Cooling Duct is a useful technology to drain air from the front so that the brake caliper & brake disc do not overheat. Another benefit is to keep the engine temperature normal because the it always gets fresh air. This study adds an air duct design or brake cooling duct to cool the brake disc using ANSYS CFD simulation with speeds of 48 Km/h and 98 Km/h to get the temperature of the brake disc when braking without cooling duct and using brake cooling duct, the difference in heat flux value after adding air duct/brake cooling duct, the process of temperature changes that occur when the air flow from the brake cooling duct touches the surface of the brake disc with speeds of 48 Km/h and 96 Km/h. The results obtained brake disc temperature when braking without cooling duct with a maximum temperature value of 137.74 ºC and using brake cooling duct with air inlet speed of 48 Km/h is a maximum of 74.73ºc and 98 Km/h is 73.42 ºc. There is a difference in heat flux value after adding an air duct / brake cooling duct of 33116 W/m2 with a speed of 48 Km/h and 33746 W/m2 with a speed of 96 Km/h. The temperature change that occurs when the air flow from the brake cooling duct touches the surface of the brake disc with a speed of 48 Km/h is 58.97º C, for a speed of 96 Km/h is 60.26º C. Keywords : Brake cooling duct , CFD, heat transfer, simulatioan temperature disk brake
PENGARUH PENAMBAHAN STP COOLER PADA AIR NON COOLANT TERHADAP TEMPERATUR MESIN Sukri; Syamsuddin, Usman; Merpatih; Musthofa, Imron; Kasmawati
ELEMEN : JURNAL TEKNIK MESIN Vol. 11 No. 1 (2024)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v11i1.271

Abstract

In general, the engine when running must be in a stable condition. So it is necessary to keep the engine temperature cool during operation, this is very important so that performance is maintained and power is not sluggish. One way is to use a cooler, adding STP Cooler to non-coolant water will certainly reduce engine temperature. The purpose of this study was to determine the effect of using STP Cooler on engine temperature when using plain water and a mixture of plain water and STP Cooler. The method used in this study was to test at 3 variations of engine speed, namely 1000 rpm, 1500 rpm and 2000 rpm. The results obtained show that the average temperature of the engine when using plain water at 1000 rpm engine speed is 65 oC, at 1500 rpm engine speed the temperature is 70 oC, and at 1500 rpm engine speed the temperature is 78.3 oC, while the average temperature when using a mixture plain water with STP Cooler at 1000 rpm rotation the temperature is 70.6 oC, , at 1500 rpm rotation the temperature is 75.3 oC, and at 2000 rpm rotation the temperature is 81 oC, . From the test results it can be concluded that when using ordinary water the average temperature is still lower than when using a mixture of ordinary water and STP Cooler.
RANCANG BANGUN TURBIN ANGIN SAVONIUS MENGGUNAKAN VARIASI SILINDER PENGGANGGU Syahyuniar, Rusuminto; Putra, Muhammad Rezky Fitri; Musthofa, Imron; Artika, Kurnia Dwi; Iranto, Roma
ELEMEN : JURNAL TEKNIK MESIN Vol. 11 No. 1 (2024)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v11i1.280

Abstract

Turbin angin Savonius sebagai alternatif sumber energi terbarukan. Turbin angin Savonius dirancang dengan prinsip kerja yang sederhana, efektif dalam menghasilkan energi listrik pada kecepatan angin rendah, dan mudah dalam perawatan. Tujuan dari penelitian ini adalah untuk merancang dan membuat turbin angin Savonius dengan memiliki efisiensi yang tinggi. Metode yang digunakan adalah metode ekperimental, pengumpulan data, perancangan turbin, pembuatan prototipe, dan pengujian. Pengujian dilakukan dengan mengukur putaran turbin dan menghitung rpm yang dihasilkan pada berbagai kecepatan angin dengan silinder pengganggu dan tanpa silinder pengganggu. Hasil penelitian menunjukkan bahwa desain turbin angin Savonius menggunakan material alumunium 6061 dengan jumlah 2 blade, tinggi blade 500 mm, diameter 722 mm. Pada kecepatan angin rendah 3 – 5 m/s blade dapat berputar untuk menggerakkan generator dan menghasilkan energi listrik, menggunakan power inverter dapat menghasilkan listrik 220 volt. Pengujian tanpa hambatan menghasilkan posisi ideal adalah jarak 0,5 meter dengan kecepatan angin sebesar 4,5 m/s menghasilkan 91 putaran permenit dan 93,7 rpm. Pengujian pengaruh variasi silinder pengganggu menghasilkan jarak ideal posisi silinder pengganggu adalah 20 cm, pengaruh silinder 4 dengan ukuran diameter 85 mm menghasilkan 73 putaran permenit, 91,2 rpm dan pengujian dengan beban generator menghasilkan kecepatan angin ideal dengan kecepatan angin 4,5 m/s dan jarak 0,5 meter menghasilkan 64 putaran permenit, 86,5 rpm dan 9,1 volt .Simulasi blade displance atau perubahan bentuk pada saat terkena angin menghasilkan nilai maksimal 0,07548 mm dan simulasi blade mises stress atau beban titik tumpu dengan nilai maksimal 3,561 MPa. Dari simulasi fluid dengan kecepatan angin 4 m/s dengan streamline 3,8 s/d 5,8 m/s.
PERAN KOMPOSISI MINERAL PADA AIR GAMBUT DALAM MEMPERCEPAT REAKSI PEMBENTUKAN GAS HIDROGEN PADA PROSES ELEKTROLISIS Musthofa, Imron; Artika, Kurnia Dwi; Hairiyah, Nina; Nugraheni, Ika Kusuma
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1635

Abstract

The existence of peatlands in Indonesia is quite extensive, but many peatlands in Indonesia are not utilized properly. So, peatlands are left as is. The low pH value of peatlands makes it very difficult to use peatlands as agricultural land and can only be planted with grass and other wild plants. Apart from that, the air from peatlands is also very abundant and of course cannot be used for consumption because the pH level is low, ranging from 3.2–4.7. Due to its low pH value, peat water also contains various metallic minerals such as Na, Mg, Al, Fe, Ca, K, and others. The mineral compounds contained in peat water indirectly produce electrolyte properties and can be used as a catalyst to speed up the reaction to produce hydrogen gas using the electrolysis method. The use of peatlands in South Kalimantan as a source of renewable energy, especially in its use as a source of hydrogen gas, is an innovative concept in providing alternative energy potential to support sustainable development. In the electrolysis process, peat water can produce an electrical voltage of 12 V which flows through the cathode and anode. From the results of research that has been carried out, the highest hydrogen gas productivity value in the M4 variable is 29 mL. This is influenced by the number of minerals in the composition of peat water. The highest electric current flowing was 0.17 A, and the highest power produced was 2.1 watts for an electrolysis time of 20 minutes.
ANALISIS KERUSAKAN BEARING MAIN SHAFT PADA MESIN SCREW PRESS MSB 15 DENGAN METODE TOTAL PRODUCTIVE MAINTENANCE (TPM) DI PABRIK KELAPA SAWIT PT. XYZ Hairiyah, Nina; Musthofa, Imron; Aminah, Aminah
Jurnal Teknologi Pertanian Andalas Vol 28 No 1 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jtpa.28.1.1-7.2024

Abstract

Salah satu perusahaan kelapa sawit yang memproduksi CPO dan kernel di Kalimantan Selatan adalah PT. XYZ. Material yang sering mengalami kerusakan pada proses produksi kelapa sawit di PT. XYZ adalah bearing main shaft pada mesin screw press MSB 15 yang mempengaruhi kualitas dan kuantitas CPO dan kernel yang dihasilkan. Penelitian ini bertujuan untuk mendapatkan penyebab kerusakan bearing main shaft pada mesin screw press MSB 15 dengan metode Total Productive Maintenance (TPM) menggunakan informasi dan pengetahuan mengenai Overall Equipment Effectiveness (OEE), TPM, dan jam kerja mesin yang ada di stasiun press. Hasil penelitian menunjukkan bahwa OEE pada mesin press di PT. XYZ berada di bawah standar, yaitu dengan nilai availability 77% yang seharusnya 90%. Nilai performance rate dan quality rate yaitu 89,57% dan 100%. Secara keseluruhan nilai OEE masih berada pada angka 68,5% masih dibawah standar yaitu 85%, yang artinya produksi yang dilakukan masih dinilai wajar namun perlu banyak perbaikan yang dilakukan. Hasil analisis yang dilakukan penyebab kerusakan bearing main shaft screw press MSB 15  stasiun press PT. XYZ adalah faktor engine error, human error, dan material.
Utilization of Corn Cob Waste as an Alternative Catalyst in Catalytic Converters for Diesel Engine Carbon Emission Reduction Muhamad, Muhajir; Musthofa, Imron; Isworo, Hajar; Putra, Muhammad Rezki Fitri; Wicaksono, Bayu Agung
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.140-146

Abstract

Catalytic converters function to transform harmful exhaust gases into less hazardous substances through catalytic reactions, primarily oxidation and reduction. This study aims to investigate the potential of corncob waste as an alternative catalytic material in catalytic converters for reducing carbon emissions from diesel engines. The methodology involves synthesizing biochar-based catalysts derived from corncobs via pyrolysis, followed by performance evaluation within a catalytic converter system under varying engine speeds: 700 RPM, 900 RPM, and 1100 RPM. Experimental results demonstrate that catalytic efficiency does not increase monotonically with char content; instead, the 70% char formulation achieved the highest smoke opacity reduction, recording 18.90% at 700 RPM and 14.70% at 900 RPM, outperforming both the 50% and 100% variants at 1100 RPM, where exhaust temperature and flow rate increase substantially, the 100% char catalyst showed comparatively greater stability, achieving a reduction of 5.50%, while the 70% formulation declined to 2.90%. These quantitative outcomes confirm that optimal performance arises from a balanced char loading that maximizes reactive surface area while preserving gas–solid interaction efficiency. Corncob biochar thus represents a viable and sustainable alternative to metal-based catalysts. However, the variability in performance across operating conditions and the need for improved thermal durability underscore the importance of further material optimization for commercial diesel applications.
Design and Development Of an Iot-Based Water Quality Monitoring System In The Palm Oil Industry At PT. PKIS Hairiyah, Nina; Rahmaida, Alya; Latifah, Risna Dwi; Musthofa, Imron; Pradesi, Jihan; Pradika Putri, Fina
Jurnal Teknologi Agro-Industri Vol. 12 No. 2 (2025): Jurnal Teknologi Agro-Industri
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat, Politeknik Negeri Tanah Laut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/jtai.v12i2.228

Abstract

The availability of clean water is a vital element in the operational processes of palm oil mills, serving both processing and domestic needs. PT. PKIS operates a Water Treatment Plant (WTP) to treat raw water from reservoirs into clean water that meets quality standards. However, the existing manual monitoring system for water quality poses a risk of delays in detecting fluctuations in critical parameters such as pH and turbidity. This study aims to design and implement an Internet of Things (IoT)-based water quality monitoring system capable of real-time monitoring of pH and turbidity parameters. The system design was conducted over five months within the industrial environment of PT. PKIS, utilizing pH and turbidity sensors integrated with an ESP32 microcontroller and the Blynk application platform for data visualization. The testing results indicate that the pH sensor demonstrates a satisfactory accuracy level with a margin of error of 2,20%, while the turbidity sensor exhibits suboptimal performance with a margin of error of 1,30%. The implementation of this system is expected to enhance the effectiveness of water quality monitoring, expedite decision-making processes, and ensure that the treated water meets the established standards, thereby supporting the sustainability of palm oil industry operations.
Co-Authors Aminah Aminah Amrah, Dwi Putra Choirul Anam, Mochammad Iranto, Roma Isworo, Hajar Ivana, Reza Taufiqi Kasmawati Kurnia Dwi Artika, Kurnia Dwi Latifah, Risna Dwi Masyithoh, Luthfiyah Dewi Merpatih Merpatih, Merpatih Muhamad, Muhajir Nugraheni, Ika Kusuma Pradesi, Jihan Pradika Putri, Fina Putra, Muhammad Rezki Fitri Putra, Muhammad Rezky Fitri Rahmaida, Alya Sofana , Ilyas Sukri sukri Sukri, sukri Syahyuniar, Rusuminto Syamsuddin, Usman Wicaksono, Bayu Agung