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All Journal Rekayasa Mesin Jurnal Ilmu-Ilmu Peternakan (Indonesian Journal of Animal Science) Jurnal Ternak Tropika JURNAL PENGABDIAN KEPADA MASYARAKAT Scientific Journal of Mechanical Engineering Kinematika International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Journal of Multidisciplinary Applied Natural Science GMPI Conference Series Jurnal Civil Engineering Study ABDI UNISAP: Jurnal Pengabdian Kepada Masyarakat Journal of Community Empowerment Jurnal Polimesin

Agung Sugeng Widodo

Fakultas Teknik Universitas Brawijaya

Author-ID : 416080

Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Pengaruh Variasi Lip Thickness pada Nozzle Terpancung terhadap Karakteristik Api Pembakaran Difusi Concentric Jet Flow Faizal, Elka; Widodo, Agung Sugeng; Sasongko, Mega Nur
Jurnal Rekayasa Mesin Vol 7, No 1 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Nozzle shape greatly influence turbulence between the fuel, air and formation of flow recirculation zone to produce a homogeneous mixing and get a near-perfect combustion. The recirculation zone is area that caused by flow rate breakdown, causing vortex and backflow around the end of nozzle. This backflow that hold up while lowering the flame so the flow rate of fuel and air mixture maintained lower or equal with flame speed. This study used variation of lip thickness of truncated nozzle 0, 4, 8, 12, and 16 mm.To obtain flame stability, fuel velocity and air velocity were variated. Thermocouples were used to measure flame temperature and its distribution. The results showed that stability of concentric jet diffusion flame flow increased with narrow lip thickness on a truncated nozzle. The wider stability area obtained in 4 mm lip thickness. In addition, temperature on diffusion flames concentric jet flow also more evenly distributed evenly with size of the nozzle lip thickness. The highest temperature and temperature distribution in the horizontal direction were occured in in the nozzle with lip thickness of 0 mm. A shadowgrapgh visualization was also used to identify phenomena of the nozzle exit flow.

Pengaruh Tekanan Pembriketan dan Persentase Briket Campuran Gambut dan Arang Pelepah Daun Kelapa Sawit terhadap Karakteristik Pembakaran Briket Nugraha, Andy; Widodo, Agung Sugeng; Wahyudi, Slamet
Rekayasa Mesin Vol 8, No 1 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Briquettes mixture of peat and charcoal leaf midrib palm oil is one of the alternative energy for replacing fossil fuel energy. It is environmentally friendly and abundant in Indonesia, mainly in South Kalimantan. In this study, the percentage of briquettes mixture of peat and charcoal leaf midrib of palm oil were 50%:50%, 60%:40%, 70%:30%, 80%:20% and 90%:10%, respectively. In addition, 1 gram of starch was added as an adhesive for every variation of briquettes mixture. In briquetting process, the pressures were 10 kg/cm2, 20 kg/cm2 and 30 kg/cm2. The combustion characteristics ofÂ briquettes was tested, then it was compared by subbituminous coal briquettes. The results show, ignition delay of briquettes decrease by increasing additional percentage of peat, however extend the burning time of briquettes, consequently the burning rate decrease and the briquettes temperature becomes low. Briquetting pressure affects the combustion characteristics of briquettes. Ignition delay of briquettes decrease by the pressure. On the other hand, extend the burning time of briquettes and decrease the burning rate, however combustion temperatures of briquettes increases. The results also show a comparison of mixture briquettes peat and charcoal palm leaf midrib with subbituminus coal briquettes. The subbituminous coal briquettes produces higher combustion temperature, the longer combustion process and the lowestÂ combustion rate.Â

Analisis Perpindahan Panas pada Kolektor Pemanas Air Tenaga Surya dengan Turbulence Enhancer Ramadhan, Muhammad Nizar; Soeparman, Sudjito; Widodo, Agung Sugeng
Rekayasa Mesin Vol 8, No 1 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

One of the solar energy utilization is solar water heater. To improve the performance of solar water heater, modifications were applied to dual absorber plate and flow channels to increase heat absorption. The aim of this study is to analyze the heat transfer of the collector solar water heater with additional modifications turbulence enhancer. Flowrate of water were varied to 1500 ml/min, 1200 ml/min, 900 ml/min, and 700 ml/min. The result shown that Â the highest collector energy loss (Qloss) and useful energy (Qu) are 92.23 Watt and 653.83 Watt, respectively, in a Â volume flow rate of 700 ml/min and the total solar radiation of 672.78 W/m2. The useful energy (Qu) increase with reducing the volume flow rate of water. This is due to by reducing the volume flow rate, the heated water will expose longer to absorb the heat from absorber plate.

Selubung Radiasi Untuk Efisiensi Penggunaan Energi Pada Kompor Gas Widodo, Agung Sugeng
Jurnal Rekayasa Mesin Vol 5, No 3 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Stove cover is a device to reduce radiation and convection heat transfer processes in a gas stove. In a condition of energy crisis recently and along with government program in oil (BBM) conversion into gas (BBG) initially in 2007, therefore an effort to conserve energy relating to BBG is needed to be performed.The aim of this research is to investigate the influence of material cover to the efficiency of conventional gas stove. Using three different materials of ceramic, aluminum and iron, the efficiency of conventional gas stove was analysed by measuring combustion energy produced by LPG, cover surface and water temperature used for cooking procces. The results showed that ceramic is the effective material as stove cover compared to aluminum or iron because ceramic have a specific heat and thermal conductivity lower than aluminum or iron. Using ceramic cover, the efficiency of conventional gas stove was increased of 2.6% to the highest efficiency of 46,6% compared to previous gas stove without cover. Ceramic cover also indicated a good characteristic for covering heat release at the initialy cooking process.Keywords: wheel numbers teeth, pressure angle, contact ratio, slidding velocity, specific slidding velocity

Jarak Optimum Panci Terhadap Selubung Pada Efisiensi Sistem Pemanasan Air Widodo, Agung Sugeng
Rekayasa Mesin Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Energy conservation from fossil fuel is urging to be implemented recently, including conservation in a conventional gas stove (CGS). Considering the mechanism of a CGS, there are many prospects to enhance its performance. In this study, efficiency of a CGS has been investigated by varying the gap between pan and stove cover. Many parameters were measured as energy from fuel, cover temperature and water temperature to develop efficiency equation of heating system. Ceramic cover was used to prevent heat release from flame. Gaps between pan and stove cover were varied in 1 mm to 7 mm with increment of 1 mm. The results showed that in certain fuel rate of 45 l/h, the gap of 4 mm indicated the highest efficiency of 46.4 % due to the optimum condition was achieved simultaneous in convection and radiation heat transfer processes of the heating system.

Pengaruh Dimensi terhadap Volume Gas HHO dan Daya Listrik pada Proses Elektrolisis Pradigdo, Dedy; Soeparman, Sudjito; Widodo, Agung Sugeng
Rekayasa Mesin Vol 9, No 2 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

The electrode area have an effect on HHO gas production volume, this phenomena influenced by electric power absorbed from the energy source to the electrode. It is necessary to examine how much the influences on process of the water electrolysis. In this research the effect of the electrode total area on the electrolysis process analyzed to determine the volume of HHO gas and electric power absorbed. The experimental method by testing the extent of several electrodes without the connection and calculating the entire surface on the electrode. The electric power is absorbed among other L1 = 6.413 mm2 : 5,2 ml : 0,774 watt, L2 = 10.028 : 28 mm2 : 7 ml : 0,9030 watt, L3 = 14.328 mm2 : 15 ml : 2,451 watt and L4 = 14.3608 mm2 : 20 ml : 6,192 watt. In this research, the highest result on the electrode having L4: 14.360,8 mm2 = 6,192-watt area. This result influenced by the surface area reacting with water at the anode and cathode of the 12 Volt 70 AH battery and the capacity of the electrolysis generator.

Unjuk Kerja Reflektor Radiasi Panas dengan 1 Baris Sirip terhadap Efisiensi Kompor LPG Sudarno, Sudarno; Soeparman, Sudjito; Wahyudi, Slamet; Widodo, Agung Sugeng
Jurnal Rekayasa Mesin Vol 9, No 2 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

It has been known from the previous researchers that the use of the heat radiation reflector can improve the efficiency of the LPG stoves. Based on the radiation theory, the radiation energy is emitted radially in all directions. Therefore, a kind of method to guide the heat radiation is required to minimize the heat losses. One of the method is to add some fins to the reflector in order to capture the potential heat loss from the non-finned reflector. In this work, we use one fin line reflector made from a plate of stainless steel in the shape of cutted-cone. The boiling water test is used to investigate the efficiency of LPG stoves. We find that the efficiency of LPG stoves can be increased by adding one fin line reflector by about 5.21% and 1.75% than that one without reflector and non-finned reflector, respectively. The result of the temperature distribution shows that one fin line reflector enlarges the area of complete combustion.

Pengaruh Lip Thickness Turncated Nozzle Sudut Luar terhadap Karakteristik Api Difusi Concentric Jet Flow Huda, Ahmad Akromul; Widodo, Agung Sugeng; SIswanto, Eko
Jurnal Rekayasa Mesin Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.01.8

Diffusion combustion is a daily combustion process where is often used primarily in industrial systems. An optimal burner design is needed to get more efficient combustion results. Then the shape of the burner nozzle greatly affects the turbulence between the fuel and air which forms the flow recirculation zone. The flow recirculation zone functions to produce homogeneous mixing and get a more perfect combustion. Recirculation zones are formed to disrupt flow rates, causing vortices and backflow around the end of nozzle. This research uses burner concentric jet flow. The lip thickness of the outer angles turncated nozzle are used 16 mm, 12 mm, 8 mm, 4 mm, and 0 mm length variation To obtain flame stability, the lift off and blow off limits are used with variations in air velocity. Thermocouples are used to measure the flame temperature distribution. The numerical simulations are used to reinforce this study. The results showed that the characteristics of the concentric jet flow diffusion affected by the use of the lip thickness of the outer angles turncated nozzle. The highest concentric jet flow diffusion stability is at 16 mm nozzle. The highest concentric jet flow diffusion temperature is at 12 mm nozzle. Experimental and numerical simulations show the perfect combustion on the 12 mm lip thickness nozzle. This can be seen by direct photographs of blue-dominated flames and the visualization of the temperature contour distribution which is dominated by red.

Peningkatan Efisiensi Sistem Pemanasan dengan Penambahan Grid pada Perforated Burner Widodo, Agung Sugeng
Jurnal Rekayasa Mesin Vol 7, No 1 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Efficiency of a domestic gas stove depend on the kind of burner material and its configuration. In this study, a material in the form of a grid Â has been inserted into combustion chamberÂ to modify flame characteristics. Grids made from stainless steel with different thickness were inserted betweenÂ burner and loading. Ceramic stove cover was used to prevent heat release from flame. To develop the term of efficiency of the system, many parameters were measured as energy from fuel, cover temperature and water temperature.Â The results show that in certain fuel rate of 45 l/h, a heating system withÂ a grid of 5 mm has maximum efficiency of 58,8 % Â indicate a differentiation of 5 % higher compared to the heating system with no grid. Grid material absorbs energy from combustion process, keep the temperature inÂ the combustion chamber remain high also induce turbulence upstream the grid surface causing fuel-air mixing Â improved.

Pengaruh Penggunaan Katalis Kalium Hidroksida pada Campuran Minyak Nabati dan Air terhadap Produksi Hidrogen dengan Menggunakan Metode Steam Reforming Mukhtar, Anas; Wardana, I Nyoman Gede; Widodo, Agung Sugeng
Jurnal Rekayasa Mesin Vol 10, No 2 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.02.5

Steam reforming is a process of hydrogen formation through the process of vaporization of vegetable oil and water at a certain heating temperature using a catalyst, so the chemical reaction is occurred and produced hydrogen gas. The catalysts used is potassium hydroxide (KOH) in the amount of 1 gram, 2 grams, and 3 grams, which are heated at 350oC. To investigate the effectiveness of hydrogen production, the vegetable oil and water mixture is varied of 1:1, 1:2, 1:3. The steam coming out from the pipe is burned to get the color of the flame. The area of flame color is calculated using AutoCAD software, which is the color are a blue flame, yellow flame, and the color of red flame. The calculation results area of the flame colors showed that the greater addition of vegetable oil to water and the greater addition of the potassium hydroxide catalyst is increased hydrogen production.

Co-Authors A.A. Ketut Agung Cahyawan W Adi Setiawan Akhmad Ali Imron Anas Mukhtar Andy Nugraha Anindito Purnowidodo Ari Wahjudi Arwin Arwin Ary Mustofa Ahmad Atiek Iriany Awaluddin Awaluddin Danang Ariyanto Denny Widhiyanuriyawan Djarot B. Darmadi Djarot B. Darmadi, Djarot B. Eko Siswanto Eko Siswanto Elandi Elandi Elandi Elok Waziiroh Faizal, Elka Fauzi, Katanda Fajar Hanafi Ashad Huda, Ahmad Akromul I Nyoman Gede Wardana Khairul Anam Khoiril Anam, Khoiril Lilis Yuliati Mega Nur Sasongko Moch. Agus Choiron Mochammad Junus Muhammad Nizar Ramadhan Muhammad Nur Shobakh Pamungkas, Ilham Akbar Pradigdo, Dedy Purnami Purnami Rahmadanti, Rahmadanti Ridlo, Mahmuddin Salim Salim, Salim Slamet Wahyudi Solikhin, Atfalus Solikhin Sudarno Sudarno Sudarno, Sudarno Sudjito Soeparman Sulistyono Sulistyono Susinggih Wijana Tamara F. Utama Tulus Subagyo, Tulus Wahyono Suprapto Wigbertus Ngabu Windi Zamrudy Wisnumurti . Yudy Surya Irawan

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