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All Journal Jurnal Silvikultur Tropika (JST) Jurnal Teknik Mesin Reaktor Prosiding Semnastek Jurnal Energi dan Lingkungan (Enerlink) Indonesian Journal of Computing, Engineering, and Design Makara Journal of Technology
Yulianto Sulistyo Nugroho
Departemen Teknik Mesin, Fakultas Teknik Universitas Indonesia Kampus UI Depok, Depok 16424
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Simulasi dan Eksperimental Isothermal Aliran Eksternal Resirkulasi pada Up-Draft Gasifier Fajri Vidian; Hery Prabowo; Yulianto .; Adi Surjosatyo; Yulianto Sulistyo Nugroho
Jurnal Teknik Mesin (Sinta 3) 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.
PEMILIHAN ADSORBEN UNTUK PENJERAPAN KARBON MONOKSIDA MENGGUNAKAN MODEL ADSORPSI ISOTERMIS LANGMUIR Yuliusman Yuliusman; Widodo Wahyu Purwanto; Yulianto Sulistyo Nugroho
Reaktor Volume 14, No. 3, APRIL 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.773 KB) | DOI: 10.14710/reaktor.14.3.225-233

Abstract

ADSORBENT SELECTION FOR CO ADSORPTION USING LANGMUIR ISOTHERMIC ADSORPTION MODEL. The objective of this research is to choose the adsorbent that can be applied to decrease toxicity level and to purify fire smoke. In case of fire, toxicity level is high due to carbon monoxide. Adsorbent is chosen based on its ability to adsorb carbon monoxide using volumetric method in constant temperature. Materials to be tested are natural zeolite, active carbon, TiO2, CuO, MgO. Due to existence of organic and mineral polluters, natural zeolite needs to be activated prior to adsorption test using fluoride acid (HF), chloride acid (HCl), ammonium chloride (NH4Cl) and followed by calcination process. Result shows that activation of natural zeolite can increase Si/Al ratio and surface area. According to Langmuir adsorption model obtained, adsorption capacity of active carbon and natural zeolite are the highest. At 1 atmospheric pressure, adsorption capacity are 0.0682 mmol/g for active carbon, 0.0464 for activated natural zeolite with particle size of 400 nm, and 0.0265 mmol/g for activated natural zeolite with particle size of (37-50) μm. Penelitian ini bertujuan untuk memilih adsorben yang dapat diaplikasikan untuk menurunkan tingkat racun dan menjernihkan asap kebakaran. Pada kasus kebakaran tingkat racun asap disebabkan tingginya kandungan karbon monoksida. Proses pemilihan adsorben dilihat pada kemampuan adsorben mengadsorpsi karbon monoksida, yang dilakukan dengan metode volumetrik pada temperatur konstan. Material yang diuji adalah zeolit alam, karbon aktif, TiO2, CuO, MgO. Zeolit alam banyak terdapat pengotor baik organik maupun mineral, oleh karena itu sebelum dilakukan uji adsorpsi, zeolit alam terlebih dahulu diaktifasi menggunakan larutan asam florida (HF), asam khlorida (HCl) dan larutan amonium khlorida (NH4Cl), dilanjutkan dengan proses kalsinasi. Hasil penelitian menunjukkan bahwa aktifasi zeolit alam dapat meningkatkan rasio Si/Al dan luas permukaan. Semua adsorben yang diuji mempunyai kemampuan mengadsorpsi karbon monoksida. Berdasarkan model adsorpsi Langmuir yang diperoleh, karbon aktif dan zeolit alam mempunyai kapasitas adsorpsi yang paling besar. Dengan menggunakan kondisi tekanan 1 atmosfir, kapasitas adsorpsi adalah 0,0682 mmol/g untuk karbon aktif, 0,0464 mmol/g untuk zeolit alam teraktifasi dengan ukuran partikel 400 nm dan 0,0265 mmol/g untuk zeolit alam teraktifasi dengan ukuran partikel (37-50) μm.
KARAKTERISASI PEMBAKARAN BATUBARA HALUS DALAM LINGKUNGAN UDARA DAN OXY-FUEL Cahyadi Cahyadi; Dwika Budianto; Adi Surjosatyo; Yulianto S. Nugroho
Jurnal Energi dan Lingkungan (Enerlink) Vol. 10 No. 1 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/elk.v10i1.4307

Abstract

PREDIKSI KARAKTERISTIK PEMBAKARAN OXY-FUEL DENGAN PEMODELAN CFD Dwika Budianto; Cahyadi Cahyadi; Adi Surjosatyo; Yulianto S. Nugroho
Jurnal Energi dan Lingkungan (Enerlink) Vol. 10 No. 1 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/elk.v10i1.4310

Abstract

Heat Propagation Patterns from Burnt Peat Samples in Jambi Erianto Indra Putra; Sulistio Rizky Iskandar; Yulianto Sulistyo Nugroho; Ati Dwi Nurhayati; Eko Setianto
Jurnal Silvikultur Tropika Vol 13 No 01 (2022): Jurnal Silvikutur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.13.01.47-52

Abstract

Kadar air gambut adalah salah satu faktor yang memengaruhi terjadinya kebakaran gambut. Penelitian ini bertujuan untuk mengetahui pengaruh kadar air gambut terhadap proses perambatan pembakaran, serta pola perambatan pembakaran gambut pada skala uji laboratorium, menggunakan reaktor panas berukuran 10x10x10 cm3 dengan 3x3 thermocouple Penelitian ini menunjukan bahwa proses pembakaran terjadi pada seluruh sampel gambut pada kadar air yang hilang (350.91%, 577.52%, dan 713.24%). Pola perambatan pembakaran yang terjadi relatif sama pada semua tingkat kadar air yang hilang, dengan termokopel 8 paling lama bertahan dengan suhu yang tinggi dibandingkan dengan termokopel lainnya. Perambatan pembakaran pada gambut yang diteliti berbeda. Nilai perambatan arah vertikal pada gambut perlakuan oven 16, 24, dan 48 jam secara berurutan yaitu 9,62 cm/jam, 24,99 cm/jam, dan 41,72 cm/jam, sedangkan nilai perambatan arah horizontal secara berurutan yaitu 11,74 cm/jam, 17,31 cm/jam, dan 21,42 cm/jam. Kata kunci: gambut, kadar air, pembakaran
Laboratory Experiments on Heat Propagation of Peat Samples from Frequently Burnt Areas in Jambi Verda Emmelinda Satyawan; Erianto Indra Putra; Yulianto Sulistyo Nugroho; Almi Ramadhi; Ati Dwi Nurhayati; Wardana Wardana; Eko Setianto
Jurnal Silvikultur Tropika Vol 13 No 01 (2022): Jurnal Silvikutur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.13.01.72-78

Abstract

Kebakaran gambut relatif sulit dipadamkan karena karakter kebakaran gambut yang membara di bawah permukaan tanah. Penelitian ini bertujuan untuk menganalisis perambatan api yang membara pada gambut yang sering terbakar dengan berbagai kadar air. Variabel yang diukur adalah perubahan suhu terhadap waktu, laju propagasi, dan laju kehilangan massa. Kadar air dari daerah yang sering terbakar yang dikeringkan selama 16 dan 24 jam adalah 272,00% dan 494,00%. Kadar air pada penelitian sebelumnya yang dilakukan terhadap sampel gambut yang dikeringkan selama 16 dan 14 jam adalah 577,52% dan 713,24%. Analisis pada kedua sampel menunjukkan bahwa sampel gambut yang dibakar pada tahun 1997/1998 memiliki suhu yang lebih tinggi daripada sampel gambut yang sering dibakar. Perambatan panas pada sampel gambut yang terbakar sekali pada tahun 1997/1998 berlangsung lebih lama (9-10 jam) dibandingkan dengan gambut yang sering terbakar (6-7 jam). Laju perambatan vertikal pada gambut yang sering terbakar lebih lambat (6-30 cm/jam) dibandingkan dengan sampel gambut yang terbakar tahun 1997/1998 (9-41 cm/jam), tetapi laju perambatan horizontal pada gambut yang sering terbakar terjadi lebih cepat (5-35 cm /jam) dibandingkan gambut yang terbakar sekali pada tahun 1997/1998 (11-21 cm/jam). Laju kehilangan massa pada gambut yang sering terbakar adalah lebih rendah (9-22 gram/jam) dibandingkan dengan contoh gambut yang terbakar sekali pada tahun 1997/1998 (25-32 gram/jam). Kata kunci: gambut, kadar air, pembakaran
Kinetic Modeling Study of Laminar Burning Velocity of Gasoline–Ethanol–Methanol Blends at Elevated Temperature and Pressure Auzani, Ahmad Syihan; Wibowo, Cahyo Setyo; Anggarani, Riesta; Nugroho, Yulianto Sulistyo; Sugiarto, Bambang
Makara Journal of Technology Vol. 25, No. 2
Publisher : UI Scholars Hub

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Abstract

Gasoline–ethanol–methanol (GEM) blends have been considered to replace pure gasoline as spark ignition engine fuel. Their physical and chemical properties and performance and emission measurements from real engines have been reported previously. However, a fundamental study that can explain the unique results of GEM compared with those of pure gasoline is lacking. This study aims to compare the laminar burning velocity of GEM blends at different mixtures, equivalence ratios, temperatures, and pressures with that of pure gasoline. A laminar flame propagation model and reaction mechanisms from the literature were were for a numerical simulation. In this study, the chemical components of real gasoline are simplified using a binary surrogate mixture. Results show that the laminar burning velocity of the GEM increased with the increase in temperature, ethanol, and methanol concentration, and it decreased with the increase in pressure. Sensitive reactions to laminar burning velocity are presented through a sensitivity analysis.
Self-ignition Properties of Peat, Palm Shell Fibre and Woods Nugroho, Yulianto Sulistyo
Makara Journal of Technology Vol. 6, No. 3
Publisher : UI Scholars Hub

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Abstract

Self-ignition properties of peat, palm shell fibre and woods. Forest fire is one of the greatest environmental problems faced by Indonesia. Forest fires have destroyed million hectares of forest and land which cause economic loss, social problems including smoke related diseases and environmental disaster with long time consequences. The exothermic reactions of forest fuels that lead to fire can be initiated by a piloted flame and low-temperature oxidation mechanism. This paper presents the results of low temperature oxidation studies using forests fuel samples i.e. palm shell fibre, peat, woods and low-rank coal. The measured values of the critical oven temperatures and the kinetic oxidation parameters are used to analyze the intrinsic properties of the samples to self-ignite. Thermal runaway reactions leading to ignition are indicated for all forest fuels tested. This reaction is affected by various factors including oven temperature, moisture content, chemical and physical properties as well as basket sizes. Attempt to extrapolate the results of these laboratoryscaled experiments for real fires still require further tests and assessments.
ANALISIS DESAIN WIND TUNNEL UNTUK VISUALISASI ALIRAN DENGAN ASAP. Kooshartoyo, Meddy; Nugroho, Yulianto Sulistyo; Pane, Invranza Zuhdi
Prosiding Semnastek PROSIDING SEMNASTEK 2024
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Pengujian terowongan angin adalah kegiatan untuk mengetahui karakteristik aliran dan visualisasi aliran merupakan salah satu bagian dari pengujian terowongan angin, yang ditujukan untuk mengetahui pola aliran udara di sekitar obyek uji. Informasi yang diperoleh dari uji visualisasi aliran selanjutnya dapat digunakan sebagai referensi dalam perancangan wahana transportasi, infrastruktur bangunan dan benda yang digunakan pada kesehariannya mengalami pengaruh gaya aerodinamika. Terdapat sejumlah cara untuk melakukan visualisasi aliran, dan salah satunya yang cukup populer adalah metode pengasapan dengan menggunakan smoke wire. Metode ini memungkinkan perolehan informasi visual dari aliran udara yang direpresentasikan dengan asap berwarna tertentu sehingga dapat mendukung proses kajian aliran udara dari aspek aerodinamik lebih lanjut. Dalam penelitian ini, cairan gliserin dan sabut kelapa dapat digunakan sebagai bahan dasar untuk pengasapan karena ekonomis dan tidak berdampak buruk pada kesehatan manusia.Kata kunci: gliserin, smoke wire, terowongan Angin, visualisasi aliran
Fire Safety Assessment of a Typical Sports Hall Building Based on Fire Dynamics and Crowd Movement Models Thareq, Achmad Efrizal; Purnomo, Dwi Marhaendro Jati; Auzani, Ahmad Syihan; Nugroho, Yulianto Sulistyo; Santoso, Muhammad Agung
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 6 No. 2 (2024): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v6i2.458

Abstract

Fire risk analysis is one of the essential components of building design to ensure the safety of occupants and properties in case of fires. Currently, the Ministry of Public Works and Housing Regulation No. 20/PRT/M/2009 provides guidelines for conducting a fire risk analysis, however, without a clear consideration of fire dynamics in the estimation of the fire risk level. In this work, we investigate the fire safety aspects of a typical sports hall buildings by a fire dynamics deterministic model (Fire Dynamics Simulator (FDS) of the National Institute of Science and Technology, USA) and crowd movement model for occupant evacuation (Pathfinder of Thunderhead Engineering). Systematic investigations were made on the effects of the fire growth category and smoke extraction system on the Available Safe Egress Time (ASET). The results of ASET were then compared to the Required Safe Egress Time (RSET) which is obtained from the evacuation model. Our results suggest that ASET decreases exponentially with fire growth rate, especially from slow to medium growth rate. The fire growth rate significantly affects the acceptable fire risk of ASET longer than RSET. Occupant capacity, fire management systems, and smoke extraction systems play important roles in reducing fire risk. However, as the fire growth rate increases, the effects of smoke extraction in maintaining safe conditions diminish. This study provides recommendations to reduce risks to the occupants in case of fire, contributing to the considerations of the design and management of a typical sports hall building.
Co-Authors Adi Surjosatyo Adrianus Pangaribuan, Adrianus Almi Ramadhi Anggarani, Riesta Ati Dwi Nurhayati Auzani, Ahmad Syihan Bambang Sugiarto Cahyadi Cahyadi Cahyadi Cahyadi Dwika Budianto Dwika Budianto Eko Setianto Erianto Indra Putra Fadhil Fadhil, Fadhil Fajri Vidian Hery Prabowo I Made Kartika Dhiputra Kooshartoyo, Meddy Muhammmad Agung Santoso, Muhammmad Agung Pane, Invranza Zuhdi Purnomo, Dwi Marhaendro Jati Santoso, Muhammad Agung Sulistio Rizky Iskandar Thareq, Achmad Efrizal Verda Emmelinda Satyawan Wardana Wardana Wibowo, Cahyo Setyo Widodo Wahyu Purwanto Widodo Wahyu Purwanto Yulianto . Yuliusman Yuliusman