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All Journal Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat International Journal of Marine Engineering Innovation and Research Jurnal Mekanik Terapan Journal of Comprehensive Science Jurnal Inovasi Teknologi dan Edukasi Teknik
I Wayan Marlon Managi
Politeknik Negeri Bali
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Transportation

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Perancangan Sudu Turbine Expander Menggunakan Profil NACA 0018 Dengan Program Cascade dan CFD I Marlon Managi
Jurnal Inovasi Teknologi dan Edukasi Teknik Vol. 3 No. 2 (2023)
Publisher : Universitas Ngeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um068v3i22023p92-98

Abstract

Research and development of the Organic Rankine Cycle (ORC) is becoming increasingly intense for converting heat into electricity. Many heat sources are available such as: solar radiation, biomass combustion, heat waste from factory and geothermal. Radial turbine is chosen for Organic Rankine Cycle due to its simple structure, components availability, and ease of application on a small power plant scale. The efficiency of the cycle is highly dependent on the design of the radial turbine. This study aims to obtain a turboexpander design with the utilization of NACA0018 airfoil as a stator. Optimization of stator blade with direct analysis method using "Cascade" program to obtain optimal inlet and outlet angle. From the simulation, the efficiency of the turboexpander was 65.13 percent with an output power of 6,513 kW. Radial turboexpander that works at an inlet pressure of 3 bar and a rotational speed 9000 rpm using the NACA0018 profile stator, obtained results where fluids flow in the rotor with shock free conditions and no swirl occurs. Penelitian dan pengembangan Siklus Rankine Organik (ORC) menjadi semakin intens untuk menkonversi panas menjadi listrik. Sumber panas yang beragam seperti: radiasi matahari, pembakaran biomassa dan pemanfaatan panas dari limbah panas pabrik, maupun panas bumi. Pemilihan turbin radial untuk siklus Rankine organik dikarenakan struktur yang sederhana, ketersediaan komponen, dan kemudahan aplikasi pada skala pembangkit listrik kecil. Effisiensi dari siklus sangat bergantung pada desain turbine radial. Studi ini dilakukan untuk memperoleh desain turboexpander dengan pemanfaatan airfoil NACA0018 sebagai stator. Optimasi sudu stator dengan metoda direct analysis menggunakan program “Cascade” untuk mendapatkan sudut inlet dan outlet yang optimal. Dari simulasi diperoleh hasil effisiensi dari turboexpander sebesar 65,13 persen dengan daya keluaran sebesar 6,513 kW.  Turboexpander radial yang bekerja pada tekanan inlet 3 bar dan kecepatan rotasional 9000 rpm dengan menggunakan stator profil NACA0018, didapat hasil dimana aliran fluida pada rotor dengan kondisi shock free dan tidak terjadi swirl.
Design and Performance Testing of a 3D Printed Mini DC Powered Pump for Microbubble Generator Tulus Hidayat Yusanto; James Julian; Fitri Wahyuni; Adi Winarta; I Wayan M. Managi Marlon Managi
International Journal of Marine Engineering Innovation and Research Vol 8, No 4 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.18826

Abstract

Centrifugal pumps are the most commonly utilized in industries, agriculture, and households. In the microbubble generator, the centrifugal pump is driven by a DC motor for efficiency. This research was conducted to determine the optimal centrifugal pump design for microbubble generators using 3D-printed PLA material. The pump drive uses a brushless DC motor. With impeller dimensions r1=16mm, r2=26mm, β1=46.8, β2=62.8, and number of blades = 8, the resulting head is 2m at a constant operational current of 3A and a flowrate of 0 L/m. The same operational current input yields a maximum flow rate of 14 L/min with a head of 0.5 m. Maximum head exists when there is no liquid on the outlet side. At current ≥ 6.5A, there is a deviation from the previously formed trend. The input power of 58W is generated when the maximum flow rate is 25L/m. Maximum efficiency can be achieved as the input current increases to ≤6.5A and 18L/m. At conditions ≥6.5A, efficiency decreases drastically as the input current increases. This centrifugal pump design can work optimally at a constant input current of 6.5A with an input power 58W for the microbubble generator.
Tablet Pemurni Air Yang Terkontaminasi Logam Berat Dengan Memanfaatkan Limbah Kerang Darah (Tegillarca Granosa) I Wayan, Marlon Managi; Arsani, Ida Ayu Anom; Wimargamal, Natan
Jurnal Mekanik Terapan Vol 6 No 2 (2025): Agustus 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i2.7536

Abstract

Water pollution caused by heavy metals such as lead (Pb) poses a serious threat to both environmental and human health. One promising solution involves the use of natural materials derived from organic waste as adsorbents, such as blood clam shells (Tegillarca granosa), which are rich in calcium carbonate (CaCO₃) and exhibit high potential following calcination. This study aims to evaluate the effect of calcination temperature variation on the adsorption efficiency of clam shells in tablet form for Pb²⁺ ions. The calcination process was conducted at temperatures of 400°C, 650°C, and 900°C for 2 hours each, following an initial drying stage at 150°C for 1 hour. The resulting calcined powder was ground, sieved, and compressed into tablets using a mechanical pressure of 150 N. Adsorption tests were carried out using a Pb solution with a concentration of 38.9 ppm for 1 hour, and the residual concentration was analyzed using Atomic Absorption Spectrophotometry (AAS). The results showed that calcination at 400°C yielded the highest adsorption efficiency at 99.3%, followed by 650°C (99.1%) and 900°C (98.4%). These findings indicate that calcination temperature significantly influences the characteristics and performance of the adsorbent, highlighting the potential of calcined blood clam shell waste as an effective and sustainable alternative for removing heavy metal contaminants from polluted water.
Model Sistem Pengolahan Pupuk Organik untuk Mendukung Ekowisata di Desa Munduk Kecamatan Banjar Kabupaten Buleleng I Made Anom Adiaksa; I Wayan Marlon Managi; I Ketut Gde Juli Suarbawa; I Putu Gede Sopan Rahtika; M. Yusuf
ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 7 No 3 (2025): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/abdi.v7i3.1305

Abstract

Kegiatan pengabdian ini bertujuan untuk memberdayakan masyarakat Desa Munduk melalui pengolahan limbah pertanian dan peternakan menjadi pupuk organik, serta mendukung pengembangan ekowisata berbasis pertanian. Model sistem pengolahan pupuk organik yang diterapkan melibatkan pembuatan pupuk kompos padat dari kotoran sapi dan pupuk organik cair dari batang pisang, menggunakan aktivator EM4. Hasil kegiatan menunjukkan bahwa pupuk kompos dengan EM4 dapat diproduksi dalam waktu 20 hari, lebih cepat dibandingkan dengan metode konvensional yang membutuhkan 40 hari. Pupuk cair (POC) yang dihasilkan siap digunakan dalam waktu 7–14 hari dan terbukti meningkatkan jumlah bunga dan buah pada tanaman cabai sebesar 18% lebih banyak dibanding kontrol. Kegiatan ini memberikan dampak positif dalam aspek ekonomi, dengan pengurangan biaya pembelian pupuk kimia sebesar ±30% dan potensi usaha pupuk organik lokal. Dalam aspek sosial, masyarakat memperoleh keterampilan baru dalam pengolahan limbah dan membentuk kelompok tani yang mandiri. Selain itu, integrasi pengolahan pupuk organik dengan ekowisata edukatif memberikan kontribusi pada penguatan daya tarik wisata desa dan edukasi lingkungan. Kebaruan program ini terletak pada pendekatan inovatif yang menggabungkan pengolahan pupuk organik dengan pengembangan ekowisata berbasis pertanian berkelanjutan. Ke depan, model sistem ini dapat dikembangkan lebih lanjut dengan meningkatkan skala produksi pupuk organik, memperkenalkan diversifikasi produk, serta mengintegrasikan energi biogas dari limbah ternak, untuk mendukung keberlanjutan ekonomi dan lingkungan Desa Munduk.
Design and Performance Testing of a 3D Printed Mini DC Powered Pump for Microbubble Generator Tulus Hidayat Yusanto; James Julian; Fitri Wahyuni; Adi Winarta; I Wayan Marlon Managi
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 4 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.5078

Abstract

Centrifugal pumps are the most commonly utilized in industries, agriculture, and households. In the microbubble generator, the centrifugal pump is driven by a DC motor for efficiency. This research was conducted to determine the optimal centrifugal pump design for microbubble generators using 3D-printed PLA material. The pump drive uses a brushless DC motor. With impeller dimensions r1=16mm, r2=26mm, beta1=46.8, beta2=62.8, and number of blades = 8, the resulting head is 2m at a constant operational current of 3A and a flowrate of 0 L/m. The same operational current input yields a maximum flow rate of 14 L/min with a head of 0.5 m. Maximum head exists when there is no liquid on the outlet side. At current >= 6.5A, there is a deviation from the previously formed trend. The input power of 58W is generated when the maximum flow rate is 25L/m. Maximum efficiency can be achieved as the input current increases to <= 6.5A and 18L/m. At conditions >= 6.5A, efficiency decreases drastically as the input current increases. This centrifugal pump design can work optimally at a constant input current of 6.5A with an input power 58W for the microbubble generator.
The Optimization of Shell and Tube Condenser Cooling System on a 5-Liter Distillation Apparatus Using a Water Jacket with Thermoelectric Sudana, I Made; Managi, I Wayan Marlon
Journal of Comprehensive Science Vol. 5 No. 3 (2026): Journal of Comprehensive Science
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jcs.v5i3.4107

Abstract

Background: In small-scale alcohol distillation, the efficiency of the condenser is critical for product quality and yield. A common problem is the rise in condenser temperature during operation, which diminishes vapor condensation efficiency and results in low alcohol concentration in the distillate. Objective: This research aims to optimize the performance of a shell-and-tube condenser in a 5-liter distillation apparatus by integrating a water jacket system equipped with a thermoelectric (Peltier) cooler. Methods: An experimental approach was employed, comparing the apparatus's performance before and after modification. Key parameters measured included inlet vapor temperature, inlet and outlet cooling water temperatures of the condenser, process duration, and the alcohol concentration of sequential distillate fractions. Results: The findings demonstrate that the thermoelectric water jacket significantly reduced and stabilized the condenser's outlet water temperature throughout the operation. The time to obtain the first distillate decreased from 23 to 16 minutes. The alcohol concentration of the initial fraction increased from 40% to 50%, and the total processing time for the same 5-liter batch was reduced from 55 to 35 minutes. Conclusion: The integration of a thermoelectric water jacket substantially enhances heat transfer and alcohol vapor condensation efficiency. This modification proves to be an effective strategy for improving the thermal performance and product quality of small-scale distillation equipment.
Co-Authors Adi Winarta, Adi Arsani, Ida Ayu Anom Fitri Wahyuni I Ketut Gede Juli Suarbawa I Made Anom Adiaksa I Made Sudana I Putu Gede Sopan Rahtika James Julian M. Yusuf Tulus Hidayat Yusanto Wimargamal, Natan