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All Journal Jurnal Teknik Mesin Journal of Engineering and Technological Sciences Jurnal Energi dan Lingkungan (Enerlink) ASEAN Journal of Community Engagement
Adi Surjosatyo
Departemen Teknik Mesin, Fakultas Teknik, Universitas Indonesia, Depok
Aerospace Engineering Automotive Engineering Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Journal : Jurnal Teknik Mesin

 1 
Pembakaran Gas Hasil Gasifikasi Biomassa di Premixed Gas Burner dengan Metoda 3D Computational Fluid Dynamic Adi Surjosatyo
Jurnal Teknik Mesin Vol. 12 No. 1 (2010): APRIL 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

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Abstract

The depletion of worlwide energy reservation and environmental issue caused by fossil fuel pollution urge mankind to find a suitable alternative energy to overcome this problem. Producer gas from biomass gasification is an example of an alternative energy that could substitute fossil fuel in a certain combustion operation. Using producer gas to generate heat needs gas burner system that can produce an effective gas flame with low emission gas. This study is using modeling and simulation of gas flame using 3D-CFD method. The gas burner model has two condition, namely, using conical flame stabilizer and without conical flame stabilizer, and the velocity tangential air supply is varied into three speed of 3 m/s, 6 m/s and 9 m/s, respectively. The result of this simulation shows the additional of conical flame stabilizer produces a shorter flame, increases flames stability and reduces CO emission. The experimental result shows a similar pattern compared with that of the simulation result. Abstract in Bahasa Indonesia: Dengan menipisnya cadangan minyak dunia dan masalah lingkungan yang diakibatkan oleh pembakaran bahan bakar fossil, maka diperlukan energi alternatif dalam mengatasi hal tersebut. Bahan bakar gas dari proses gasifikasi biomassa (producer gas) adalah salah satu energi alternatif yang dapat menggantikan bahan bakar fosil. Pemanfaatan producer gas untuk aplikasi pengeringan dan pemanasan boiler memerlukan suatu sistem gas burner yang dapat menghasilkan panas tinggi dan polusi rendah. Pada penelitian ini sebuah model gas burner berbahan bakar producer gas dilakukan pemodelan simulasi secara 3D menggunakan CFD. Simulasi dilakukan dengan menggunakan swirl gas burner dengan menggunakan conical flame stabilizer dan tanpa menggunakan conical flame stabilizer pada variasi kecepatan udara masuk tangensial 3 m/s, 6 m/s dan 9 m/s. Hasil simulasi menunjukkan penambahan conical flame stabilizer menghasilkan api yang lebih pendek dan stabil. Penambahan kecepatan udara memendekkan panjang api dan menurunkan temperatur api. Validasi eksperimental dilakukan pada gas swirl burner yang menggunakan conical flame stabilizer. Simulasi dan eksperiment menunjukkan hasil yang tidak jauh berbeda. Kata kunci: CFD, producer gas, gas burner, conical flame stabilizer.
Simulasi dan Eksperimental Isothermal Aliran Eksternal Resirkulasi pada Up-Draft Gasifier Fajri Vidian; Hery Prabowo; Yulianto .; Adi Surjosatyo; Yulianto Sulistyo Nugroho
Jurnal Teknik Mesin Vol. 13 No. 1 (2011): APRIL 2011
Publisher : Institute of Research and Community Outreach - Petra Christian University

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Abstract

Gasification process at updraft gasifier produces greater amount of tar than other type of gasifier. To reduce tar at updraft gasifier, the pirolysis gas will be re-circulated to combustion zone and to exhaust gas from reduction zone. Recirculation of pirolysis gas to combustion zone can be carried out by using ejector. Ejector is an equipment used to inject the secondary fluid flow by the movement of momentum and energy from high speed primary flow (jet). The research conducted with isothermal 3D simulation using CFD and experimental investigation of recirculation flow using ejector at updraft gasifier. Ejector velocity for simulation and experimentation is constant at 0.6 m/s. Ejector’s nozzle exit position (NXP) direction will be varied. The goal of this research is to obtain information of optimal nozzle exit position for producing maximum velocity of gas recirculation. The result of simulation and experiment shows that the change of nozzle exit position direction to – x axis from zero point, it will give maximum velocity of gas recirculation flow with the optimum position of nozzle exit position at the range of -3 to -4 cm from zero point.
Co-Authors Arief Wildhan Naro Putra Cahyadi Cahyadi Cahyadi Cahyadi Dadan Kosasih Dwika Budianto Dwika Budianto Fajri Vidian Hafif Dafiqurrohman Hafif Dafiqurrohman Hanif Furqon Hidayat Hery Prabowo Muhammad Ismail Bagus Setyawan Rachman Setiawan Radon Dhelika Siregar, Sri Rachmawati Sofianita, Rifka Yulianto . Yulianto Sulistyo Nugroho