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PENGARUH OUTSERT TERHADAP ALIRAN DAN PERPINDAHAN KALOR PADA ANNULAR HEAT EXCHANGER TIPE HORIZONTAL Ma'a, Mustaza; Kamal, Samsul; Pranoto, Indro
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1512

In the industrial environment, there is a need to boost heat transfer. The flow manipulation method was selected because it is less expensive, simpler to use, and more accessible. It is wise to utilize a horizontal type annular heat exchanger because it is simple and easy to manufacture. Cold fluid from the reservoir tank is pumped through the annulus in a closed system. Cold fluid passes through the Omega rotameter before it enters the experiment apparatus. The cooling system allows cold fluid to leave through the outlet and return to the reservoir tank. There are five different cold fluid flow rates, ranging from 2.5 GPM to 5 GPM. A tubular heater with a 500 W heat rate is inserted in the annular heat exchanger's midsection. The flow inside the annulus is heated by this heater. According to the results of the experiments, utilizing outsert has the potential to increase the heat transfer coefficient (h) average 89,84%, Nusselt number (Nu) average 76,76%, and friction factor (f) average 55,48%. The flow regime, which starts out in laminar circumstances and transition to quasi-turbulent and turbulent conditions at Re = 8000, is also impacted by the presence of an outsert. The thermal performance factor (η) average 1,54, which demonstrates an increase in heat transfer.

Effect of Temperature and Roasting Duration on the Quality of Roasted Peanuts in Bin Roaster With Burner Heating : An Experimental Investigation Checilia, Azzahra Dwi; Ma'a, Mustaza; Wijianto, Agus; Nugraha, Nurcahya
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 17, No. 01, Desember 2024
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v17i1.2907

Kacang sangrai merupakan salah satu jenis pengolahan kacang tanah yang memiliki potensi ekonomi yang cukup besar peluangnya di Indonesia. Kacang sangrai cukup digemari sebagai cemilan karena rasanya yang manis dan masa penyimpanannya tahan lama. Untuk dapat efektif, diperlukan pula cara penyangraian yang benar. Seperti pengaturan temperatur dan lama penyangraiannya. Adapun jenis penyangraian yang menggunakan bantuan media pasir.Penelitian ini dilakukan untuk melakukan pengujian eksperimental terhadap proses penyangraian kacang, Dimana proses penyangraian dilakukan dengan 2 variabel bebas, yaitu variasi suhu dan variasi media penyangraian. Untuk suhu menggunakan 3 variasi pengujian, yaitu 150 C, 165C, dan 180C. Sedangkan variabel media penyangraian menggunakan 2 variasi, yaitu dengan menggunakan media pasir dan tanpa menggunakan media pasir. Metode pengambilan data berupa pengambilan data eksperimental temperatur di 5 titik setiap 5 menit sekali. Dilakukan hingga kacang berubah warna kecoklatan (matang). Dari hasil pengujian, didapatkan hasil kacang sangrai yang baik pada saat pengujian temperatur 180 C dengan menggunakan bantuan media pasir. Tingkat kegosongan kacang sebesar 2% dari 1 Kg pengujian, butir kacang rusak sebanyak 18gr, lama waktu penyangraian 1 kg kacang selama 25 menit, dan pengurangan kadar air pada kacang mencapai 20%

The Effect of Funnel Angle on Density, Hardness, and Calorific Value in Briquette Pressing Machine Ma'a, Mustaza; Syachreffi, Mohammad Ichwan; Novison, Roni; Zaira, Jupri Yanda; Nugroho, Nur Cahya
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.721

Efforts to find new energy sources continue, including Renewable Energy Sources (RES). Biomass is an alternative source of renewable energy and one example of biomass is briquettes. Briquettes are solid fuels made from renewable organic materials derived from plants such as mangrove wood, coconut shells, and palm kernel shells. Thus, briquettes can serve as an alternative energy source to replace fossil fuels like coal. In this study, briquettes were produced using a briquette pressing machine with a screw conveyor method. The briquette materials used were palm kernel shell charcoal dan mangrove wood charcoal, with variations in funnel angles to observe the impact on briquette quality. The funnel angles tested were 55̊, 60̊ and 70̊. Three tests were conducted : density, hardness and Water Boiling Test (WBT),with five data points for each test. The best results were obtained for mangrove wood briquettes at a 55̊ funnel angle, with an average density of 1,12 grams/cm3, average hardness of 38,34 kg/cm2 and average WBT value of 5.785,02 kJ/kg. Funnel angle significantly influenced the quality of the produced briquette.

Homogenization of Bricket Dough: A Study on Horizontal Helical Ribbon Mixer Ma'a, Mustaza; Adli, Muhammad Amirul; Novison, Roni; Wijianto, Agus; Nugraha, Nurcahya
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.727

The design of this briquette dough mixer machine is designed to mix briquette dough with a horizontal stirrer, the mixing knife used is a helix with two blades with different directions and sizes. This mixing machine uses a 1 HP AC motor with a motor speed of 1,400 Rpm, the engine also uses a 1:20 ratio gearbox, the rotation is obtained at 70 Rpm then reduced again to 50 Rpm using the pulley ratio so that the rotational speed achieved is 50 Rpm. The capacity of the mixing tube made is 10 kg in one mixing process, to be able to reach a capacity of 10 Kg requires matching the composition of the dough which consists of 5.75 Kg of charcoal, 0.287 Kg starch and 4.025 Kg water. In the process of mixing the dough, the starch is first dissolved in hot water, then slowly poured into the drum which has been filled with charcoal powder. Data collection was carried out by comparing 3 time variations, namely 10, 20 and 30 minutes. After mixing, the dough from each time variation was divided into 4 samples weighing 2.5 kg each and placed in different places. We can compare each time variation in terms of shape, texture and color so that we can analyze it. It was found from field experiments that to produce quality briquette dough, the mixing time was 30 minutes with an average power consumption of 2.49 KwH.

Creating a Vertical Peeling Apparatus for Young Jackfruit Skins Employing Turning Process Technology Hermawan, Muhammad; Ma'a, Mustaza; Yanda Zaira, Jupri; Wijianto, Agus
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 17, No. 02, Juni 2025
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v17i2.3178

Young Jackfruit (Artocarpus heterophyllus) is a tropical fruit that grows in various regions, including Southeast Asia. While typically harvested when ripe, it is also consumed in its young stage. This final project focuses on the design and development of a Vertical Young Jackfruit Skin Peeling Machine utilizing the Turning Process Method. The proposed peeling machine is powered by a 1 hp motor with a speed of 1450 rpm, which is transmitted to 100 rpm. The machine's driving mechanism comprises a single transmission system, consisting of a pair of pulleys connected by a V-belt. When the motor is activated, the rotation is directly transmitted from pulley 1 to pulley 2, mounted on a 25 mm diameter shaft that rotates the young jackfruit using a V-belt intermediary. As the shaft rotates, a knife applies pressure on the rotating young jackfruit, moving from bottom to top. This movement is facilitated by a threaded shaft mechanism driven by the rotation of the fruit-driving shaft, which receives the rotational transmission from pulley 1 to pulley 2, mounted on a 25 mm diameter shaft to a 17 mm diameter shaft with a rotational speed of 40 rpm. The peeling process is conducted according to the dimensions of the young jackfruit, from bottom to top.

Experimental study of the strength of straw rope as a material for making mattresses Agus Wijianto; Ma'a, Mustaza; M Ghifari Hadi; Roni Novison
JTTM : Jurnal Terapan Teknik Mesin Vol 6 No 2 (2025): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v6i2.1376

This experimental study thoroughly investigates the impact of soaking straw ropes using three different liquids oil, urea, and salt, on tensile strength and other mechanical properties. The experiment involved meticulously prepared straw rope samples, each with standardized diameter and length, subjected to rigorous testing using a tensile testing machine to gather precise and reliable data. The empirical results revealed significant differences in tensile strength, strain, and elastic modulus among the samples, largely influenced by the type of soaking liquid used during the testing phase. Straw ropes immersed in oil exhibited the highest tensile strength and strain before fracture, followed closely by ropes soaked in urea and salt, while ropes treated with starch showed the least enhancement in mechanical properties. This comprehensive examination provides profound insight into the behavior and characteristics of straw ropes when exposed to various soaking liquids, highlighting the potential modifications in their mechanical performance. The findings contribute valuable knowledge for practical applications in industries such as construction, agriculture, and other sectors where straw ropes are employed as a material requiring specific mechanical attributes. Moreover, this research underscores the importance of selecting appropriate soaking liquids to enhance the mechanical properties of straw ropes, offering a foundation for future studies and practical implementations aimed at optimizing the use of straw ropes in various applications. By elucidating the effects of different soaking treatments, this study not only advances the understanding of straw rope mechanics but also presents actionable information to improve material performance in real-world scenarios.

Perencanaan Peningkatan Kapasitas Mesin Penanam Padi Berbasis Sintesis Kinematika Dan Dinamika Silalahi, Samuel Tabah Penemuan Parulian; Wijianto, Agus; Zaira, Jupri Yanda; Ma'a, Mustaza
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.253

Rice is a food crop commodity that plays a vital role in the Indonesian economy. The results of this study indicate that the designed system is capable of consistently maintaining a 25 cm spacing between seedlings through the harmonic motion of the planting arm. The angular and linear movements of the entire linkage are stable and periodic, resulting in a uniform planting process. The angular velocity of the main shaft is recorded as constant, supporting rotational stability, while the maximum motor torque is within a realistic range for field applications. The system also demonstrates good mechanical efficiency, characterized by stable kinetic energy of the rotational components and controlled motor power consumption. These findings have practical significance for practitioners and the agricultural machinery industry, as they can serve as a reference for the development of rice transplanters that are more energy efficient, highly precise, and suited to rice field conditions in Indonesia, thus potentially increasing productivity and reducing reliance on manual labor.

OPTIMIZATION PITCH AND CLEARANCE FOR DOUBLE HELICAL RIBBON AGITATOR IN BRIQUETTE DOUGH MIXING MACHINE: ANALYSIS OF TORQUE AND POWER IMPACT Ma'a, Mustaza; Faadhilah, Hanif; Wijianto, Agus; Novison, Roni
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.1905

Briquette dough kneading machines have become an integral part of the briquette production process in industry. This study aims to analyze the effect of pitch (distance between two windings) and clearance (distance between stirrer and machine wall) on the performance of double helical ribbon stirrer in stirring briquette dough. The numerical method used is Discrete Element Method (DEM), using a stirring speed of 50 rpm and a particle size of 10 mm. In this simulation, the briquette mixture was modeled as two granular materials consisting of spherical particles. The particles were characterized using density, with briquette powder at 766 kg/m3 and starch glue at 1000 kg/m3. Simulation results show that variations in pitch and clearance significantly affect the distribution of torque, mechanical power, and dough flow. The stirrer with 157.5 mm pitch has the smallest torque and power, then the torque and mechanical power increase about 260% in the stirrer with 118.5 mm pitch. Then the stirrer with a pitch of 94.8 mm has a very high torque and mechanical power with an increase over the previous stirrer of about 1500%. The researcher concluded that the double helical ribbon stirrer with a pitch distance of 118.5 mm and a clearance of 10 mm is the appropriate stirrer to be used, with torque and power of 41.62749 Nm and 318.3174 W. This is corroborated by the simulation results with a visual assessment showing that the shear force and homogeneity are in optimal condition, although the torque and power are not too close to the design calculation results of 53.0836 Nm and 277.8042 W.

PENGARUH OUTSERT TERHADAP ALIRAN DAN PERPINDAHAN KALOR PADA ANNULAR HEAT EXCHANGER TIPE HORIZONTAL Ma'a, Mustaza; Kamal, Samsul; Pranoto, Indro
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1512

In the industrial environment, there is a need to boost heat transfer. The flow manipulation method was selected because it is less expensive, simpler to use, and more accessible. It is wise to utilize a horizontal type annular heat exchanger because it is simple and easy to manufacture. Cold fluid from the reservoir tank is pumped through the annulus in a closed system. Cold fluid passes through the Omega rotameter before it enters the experiment apparatus. The cooling system allows cold fluid to leave through the outlet and return to the reservoir tank. There are five different cold fluid flow rates, ranging from 2.5 GPM to 5 GPM. A tubular heater with a 500 W heat rate is inserted in the annular heat exchanger's midsection. The flow inside the annulus is heated by this heater. According to the results of the experiments, utilizing outsert has the potential to increase the heat transfer coefficient (h) average 89,84%, Nusselt number (Nu) average 76,76%, and friction factor (f) average 55,48%. The flow regime, which starts out in laminar circumstances and transition to quasi-turbulent and turbulent conditions at Re = 8000, is also impacted by the presence of an outsert. The thermal performance factor (η) average 1,54, which demonstrates an increase in heat transfer.

Rancang Bangun Mesin Penyerut Bahan Baku Anyaman Rotan Dengan Mekanisme Double Roll Edilla, Edilla; Farhan, Muhammad; Rahmawaty, Made; Jaenudin, Jajang; Ma'a, Mustaza
JURNAL INTEGRASI Vol. 16 No. 2 (2024): Jurnal Integrasi - Oktober 2024
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v16i2.8224

Rattan Is one of the plants that grow in Indonesia, One of the areas that includes many rattan producers is Riau. Rattan is a plant that is one of the raw materials in the handicraft and furniture industry, therefore, to take advantage of the many rattan plants can be used as a furniture product such as tables, chairs and other handicrafts. The machine is designed using a driving force using a 1 phase electric motor using a double roll pulling system made of rubber and using a blade with a diameter of 5 mm, and this machine also has a safety on the control system so that the AC motor is not easily burned when the current is excessive. This machine can produce 76 rattan sticks per hour with a size 5 mm diameter and 300 cm lenght so that it can increase rattan production more effectively and efficiently. This rattan shaving machine is capable of shaving 300 cm of raw rattan with a diameter of 10-13 mm and the consistency of the thickness produced is 5 mm in diameter with an error rate of 0.22%.

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