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All Journal INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Teknologi Terapan JMES The International Journal of Mechanical Engineering and Sciences EduInovasi: Journal of Basic Educational Studies

Bambang Sudarmanta

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Author-ID : 2567445

Religion Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Articles

ANALISIS KEKUATAN PEGAS PRESSURE REDUCER SEBAGAI PENURUNAN TEKANAN PADA MESIN DUEL FUEL Dori Yuvenda; Bambang Sudarmanta; Erzeddin Alwi
invotek Vol 17 No 2 (2017): INVOTEK: Jurnal Inovasi, Vokasional, dan Teknologi
Publisher : Universitas Negeri Padang

Pressure reducer merupakan komponen utama pada conversion kit pada mesin bahan bakar ganda (duel fuel engine) yang berfungsi sebagai penurun tekanan pada bahan bakar compressed Natural gas dari tangki sebesar ± 250 bar menjadi tekanan kerja pada injektor gas sebesar ± 2 bar, sehingga menyebabkan kekurangan pasokan jumlah bahan bakar dari pressure reducer yang berpengaruh tethadap penurunan performa mesin, baik pada saat perubahan putaran mesin secara tiba-tiba maupun perubahan beban mesin. Mengatasi permasalah tersebut maka diperlukan upaya untuk meningkatkan performa pressure reducer agar lebih adaptif terhadap perubahan kondisi mesin. Salah satu upaya yang dilakukan untuk peningkatan performa tersebut adalah menambah kekuatan konstanta pegas pada area chamber stage dua pressure reducer. Penelitian ini menggunakan mesin Diamond tipe DI 800 dengan sistem dual fuel model indirect injection. Metode yang dilakukan adalah menvariasikan kekuatan konstanta pegas (25,55 N/m, 26,55 N/m, dan 27,55 N/m). Hasil terbaik didapatkan pada konstanta pegas 27,55 N/m terjadi peningkatan jumlah laju aliran gas (mass flow rate) pada saluran keluar (outlet gas pressure reducer) sebesar 7,42%. Hal ini menunjukkan terjadi peningkatan performa pressure reducer pada saat penambahan kontanta pegas pada stage dua

PENGARUH KECEPATAN ALIRAN UDARA DENGAN PENGATURAN DIMMER PADA TEKANAN UDARA MASUK PADA PROSES GASIFIKASI SEKAM PADI TERHADAP PEMBENTUKAN FLAMABLE GAS Suliono Suliono; Felix Dionisius; Bambang Sudarmanta
Jurnal Teknologi Terapan Vol 6, No 1 (2020): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

The biomass gasification process is a way to obtain combustible syn-gas through combustion of biomass in a closed reactor with the help of air from a compressed blower. Without the help of air gas formation process is not possible, the combustion in the furnace must have air that can start a fire. The tool for supplying air is a pressure blower. The purpose of this study was to obtain a stoichiometric air and biomass mixture in the rice husk gasification process. With the stoichiometric air fuel ratio (AFR) in the rice husk gasification process, it will produce a perfect flammable syn-gas.The method used in this research is to change the rice husk solid through the gasification process. The gas released in the gasification process will be varied at the blower speed with or without using a dimmer. From the test results, it can be seen in the syn-gas output from the reactor. on dimmer 1 the inlet airspeed is 3.5 m / s, on dimmer 2 the airspeed is 4.0 m / s. In dimmer 3 the air velocity is 4.5 m / s and in dimmer 4 the air velocity produced is 5.0 m / s From the results of testing the air velocity of each variation that enters the reactor only air velocity 4.5 m / s and 5.0 m / s or in dimmers 3 and 4 which can produce flammable syn-gas.

Numerical Study Effect of Fluidizing Air to Erosion Pattern in Circulating Fluidized Bed Boiler Bambang Sudarmanta; Rizki Mohammad Wijayanto; Giri Nugroho; Achmad Syaifudin; Atok Setiyawan; Julendra B. Ariateja
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 2 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i2.3901

Bed material particles in a Circulating Fluidized Bed (CFB) boiler which entrained in the flue gas may cause material degradation due to abrrasive and high velocity impact of particles to wall surface. In this study, Computational Fluid Dynamic (CFD) commercial software with Eulerian multiphase is used to study the erosion pattern in several different fluidizing air velocity. The result obtained from simulation in terms of particles volume fraction and particles velocity in selected area was utilised to predict the erosion rate in several different fluidizing air velocity to achieve the optimal value of fluidizing air velocity. The results obtained in this study are helpful to understand how erosion pattern in CFB boiler, how effect fluidizing air velocity to erosion rate, and also helped to know the potential areas occur erosion so helped to choose suitable material in different region.

Gasification and Techno-Economic Study of Palm Shell Biomass and the Utilization of Dual Fuel Diesel Engine Operated Diesel Engine Hasman Hasan Suli; Bambang Sudarmanta
EduInovasi: Journal of Basic Educational Studies Vol. 4 No. 2 (2024): EduInovasi: Journal of Basic Educational Studies (In Press)
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/edu.v4i2.4323

Indonesia's oil reserves and production are steadily declining, accompanied by increasing fossil fuel consumption, particularly in Diesel Power Plants, which contribute to environmental impacts and exacerbate global warming. In response, the government issued a policy in 2028 to implement carbon emission trading for Diesel Power Plants with a capacity below 2 MW, as part of Indonesia's commitment to achieving Net Zero Emission (NZE) by 2060. Considering the significant state assets in the form of diesel-powered generators (approximately 5,200 diesel power plants) still operating throughout Indonesia, the government has also issued policies and strategic plans to develop Biomass Power Plants. This research focuses on examining the combination of biosolar B35 and syngas usage in diesel engines, known as dual fuel engine technology, utilizing abundant palm shell biomass waste in Southeast Sulawesi. The gasification process to create syngas uses a multi-stage downdraft gasifier system with the optimal air ratio variation from previous research, namely 1:7:2 in the pyrolysis, oxidation, and reduction zones. Testing is conducted on a diesel engine at 3000 rpm with load variations ranging from 500 Watt to 4500 Watt. The load is gradually increased at 500-Watt intervals. The syngas mass flow rate is also varied by adjusting four different syngas valve openings to the diesel engine's intake manifold. This study will compare the results of diesel engine operation using single fuel (biosolar B35) with dual fuel (biosolar B35 + syngas) at each engine load interval to determine engine performance, biosolar B35 fuel substitution or savings, carbon reduction in the dual fuel diesel system, and calculate the techno-economics for up-scaling on a 250 kW capacity engine at PT Nusantara Power, Unit Pembangkitan Kendari, ULPLTD Kolaka, Southeast Sulawesi. The aim is to support government programs and policies in realizing environmentally friendly and sustainable Diesel Power Plants, as well as to open opportunities for developing biomass-based dual fuel engine technology in Indonesia.

Co-Authors Atok Setiyawan Dori Yuvenda Erzeddin Alwi Felix Dionisius Hasman Hasan Suli Julendra B. Ariateja Nugroho, Giri Rizki Mohammad Wijayanto Suliono Suliono Winnugroho Wiratman, Manfaluthy Hakim, Tiara Aninditha, Aru W. Sudoyo, Joedo Prihartono

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