Willyanto Anggono
Petra Christian University
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Featured researches published by Willyanto Anggono.
Journal of Physics: Conference Series | 2013
Willyanto Anggono; I. N. G. Wardana; M. Lawes; Kevin J. Hughes; Slamet Wahyudi; Nurkholis Hamidi; Akihiro Hayakawa
Spherically expanding flames propagating at constant pressure were employed to determine the laminar burning velocity and flammability characteristics of biogas-air mixtures in premixed combustion to uncover the fundamental flame propagation characteristics of a new alternative and renewable fuel. The results are compared with those from a methane-air flame. Biogas is a sustainable and renewable fuel that is produced in digestion facilities. The composition of biogas discussed in this paper consists of 66.4% methane, 30.6% carbon dioxide and 3% nitrogen. Burning velocity was measured at various equivalence ratios (ϕ) using a photographic technique in a high pressure fan-stirred bomb, the initial condition being at room temperature and atmospheric pressure. The flame for methane-air mixtures propagates from ϕ=0.6 till ϕ=1.3. The flame at ϕ≥1.4 does not propagate because the combustion reaction is quenched by the larger mass of fuel. At ϕ≤0.5, it does not propagate as well since the heat of reaction is insufficient to burn the mixtures. The flame for biogas-air mixtures propagates in a narrower range, that is from ϕ=0.6 to ϕ=1.2. Different from the methane flame, the biogas flame does not propagate at ϕ≥1.3 because the heat absorbed by inhibitors strengthens the quenching effect by the larger mass of fuel. As in the methane flame, the biogas flame at ϕ≤0.5 does not propagate. This shows that the effect of inhibitors in extremely lean mixtures is small. Compared to a methane-air mixture, the flammability characteristic (flammable region) of biogas becomes narrower in the presence of inhibitors (carbon dioxide and nitrogen) and the presence of inhibitors causes a reduction in the laminar burning velocity. The inhibitor gases work more effectively at rich mixtures because the rich biogas-air mixtures have a higher fraction of carbon dioxide and nitrogen components compared to the lean biogas-air mixtures.
Applied Mechanics and Materials | 2013
Willyanto Anggono; I.N.G. Wardana; M. Lawes; Kevin J. Hughes; Slamet Wahyudi; Nurkholis Hamidi
Biogas as a “Powergas” is an alternative fuel produced in digestion facilities, that is sustainable and renewable. Based on chemical analysis, the composition of the biogas produced in East Java is 66.4% methane, 30.6% carbon dioxide and 3% nitrogen. Methane is a flammable gas, whereas, nitrogen and carbon dioxide are inhibitors. Given it has a different composition to traditional fuels, a fundamental study of biogas flame propagation characteristics is desirable to quantify this important fuel property. Spherically expanding flames propagating at constant pressure are employed to measure the laminar burning velocity and flammability characteristics as mixture function of the mixture composition. These important parameters were measured using a photographic technique in a high pressure fan-stirred bomb. The characteristics of biogas-air flames were initially studied at reduced pressure and at various equivalence ratios from the lower flammable limit to the upper flammable limit. The results were compared with those from biogas-air flames at atmospheric pressure. Based on this experimental investigation, the laminar burning velocities of biogas-air mixtures at reduced pressure were 0.218 m/s for ϕ=0.75, 0.246 m/s for ϕ=0.80 and 0.269 m/s for ϕ=0.85 respectively and only for these biogas mixtures propagated at reduced pressure. At the same equivalence ratio (ϕ), the laminar burning velocities of the biogas-air mixtures at reduced pressure are higher than those at atmospheric pressure. The flammable region of biogas became narrower by reducing initial pressure. The dilution effect is stronger at reduced pressure. Therefore, the flammable composition mixture areas of biogas-air mixtures are more limited at reduced pressure than those at atmospheric pressure.
5TH INTERNATIONAL CONFERENCE AND WORKSHOP ON BASIC AND APPLIED SCIENCES (ICOWOBAS 2015) | 2016
Willyanto Anggono; Fandi Dwiputra Suprianto; Tan Ivan Hartanto; Kenny Purnomo; Tubagus P. Wijaya
Biogas is one of alternative energy and categorized as renewable energy. The main sources of biogas come from animal waste, garbage, and household waste that are organic waste. Primarily, over 50% of this energy contains methane (CH4). The other substances or inhibitors are nitrogen and carbon dioxide. Previously, carbon dioxide effect on biogas combustion is already experimented. The result shows that carbon dioxide reduces the flame propagation speed of biogas combustion. Then, nitrogen as an inhibitor obviously also brings some effects to the biogas combustion, flame propagation speed, and flame characteristics. Spark ignited cylinder is used for the premixed biogas combustion research. An acrylic glass is used as the material of this transparent cylinder chamber. The cylinder is filled with methane (CH4), oxygen (O2), and nitrogen (N2) with particular percentage. In this experiment, the nitrogen composition are set to 0%, 5%, 10%, 20%, 30%, 40%, and 50%. The result shows that the flame propagation spe...
IOP Conference Series: Materials Science and Engineering | 2017
Willyanto Anggono; Sutrisno; Fandi Dwiputra Suprianto; Jovian Evander
Pterocarpus indicus are commonly utilized as greening and found in Surabaya city. Since this plant exists in large number, its fallen twigs become waste and aggravating the cleanliness of the Surabaya city. This study has investigated the possibility to utilize Pterocarpus indicus twigs waste as a renewable energy source. The study investigated the effect of tapioca (binding material) proportion toward the calorific value of briquette. The investigation was conducted using biomass composition ranges from 50% to 90% with 10% increase for each trial. The result suggests that the 90% biomass material-10% binding materials blends are the ideal composition for Pterocarpus indicus twigs waste briquette. Afterward, proximate and ultimate analyses were conducted to determine the viability of Pterocarpus indicus twigs waste as fuel. Another investigation was also conducted to discover the effect of particle size and compacting pressure on briquette quality. The parameters used for assessing briquette quality include flame temperature, ignition time, burning time, and combustion rate. The result suggested that the value of flame temperature, ignition time and burning time increase with the increase of compacting pressure and smaller particle size. Combustion rate dropped as the pressure increase and particle size reduced. The best quality for briquettes of Pterocarpus indicus is acquired with a particle size of 60 mesh and compacting pressure of 2 MPa, which have a flame temperature of 515 °C, ignition time 251 seconds, burning time of 6590 seconds, and a combustion rate of 0.00303 gr/seconds.
Jurnal Teknik Mesin | 2016
Andreas Wijaya Kasrun; Willyanto Anggono; Teng Sutrisno
Pada era globalisasi ini, kebutuhan energi semakin meningkat. Penggunaan bahan bakar fossil yang semakin tinggi mengakibatkan semakin menipisnya cadangan bahan bakar. Penggunaan bahan bakar biomassa merupakan salah satu alternatif untuk mengurangi penggunaan bahan bakar fossil. Bahan bakar biomassa yang digunakan berupa bahan bakar padat dan dijadikan dalam bentuk briket. Briket dibentuk dari bahan baku limbah daun pohon bintaro dengan campuran bahan perekat tepung tapioka dengan kadar 90:10. Nilai kalor atas dari bahan bakar briket sebesar 4164 Kcal/kg. ukuran partikel berpengaruh kepada bentuk fisik maupun pembakaan briket. Ukuran partikel yang semakin kecil akan membuat bentuk fisik briket menjadi halus, tetapi briket menjadi lebih susah terbakar.
International Journal of Industrial Research and Applied Engineering | 2016
Willyanto Anggono; Fandi Dwiputra Suprianto; Sutrisno Sutrisno; Andreas Wijaya Kasrun
Indonesia is a tropical country and has abundant varieties of plants but has not been utilized to the fullest. One of the plants that are often encountered in the community is Cerbera manghas . Cerbera manghas is known as one of the trees that have solid roots; thus, it is widely used for adding greenery both on the roadside and the residential areas of Surabaya. Although beneficial for shade and the reduction of air pollution in urban areas, waste from the leaves of this plant become a serious issue for the cleanliness of the city. Organic solid waste that comes from the falling leaves have the potential to be used as a solid fuel alternative in the form of briquettes when processed appropriately. This study aims to investigate the potential of Cerbera manghas leaves waste to be used as raw material of biomass briquettes with tapioca as a binder, to evaluate the property of the resulted briquettes using ultimate analysis, proximate analysis, and also to find the effect of the composition of tapioca to the heating value of the biomass briquettes. Heating values of five mixtures with various tapioca compositions of 10%, 20%, 30%, 40%, and 50% were evaluated using an oxygen bomb calorimeter. The experimental results showed that the biomass briquettes made of Cerbera manghas leaves waste can be made using tapioca as a binder. The greater the percentage of the mass of tapioca in the briquettes, the lower heating value generated. Biomass briquettes made of Cerbera manghas leaves waste can be made into a source of sustainable energy with the optimal composition of 90% waste leaves and 10% tapioca.
Applied Mechanics and Materials | 2016
Willyanto Anggono; Fandi Dwiputra Suprianto; Kenny Purnomo; Tan Ivan Hartanto; Tubagus P. Wijaya
Biogas contains more than 50% methane (CH4), is a renewable and eco-friendly fuel produced by bacterial action. Not only is biogas flammable but it also contains inhibitors like carbon dioxide and nitrogen, as well as small amounts of H2, O2, H2S and others. Several associated studies have been conducted in order to examine biogas combustion characteristics in external combustion and flame angle, flame height and dimensionless flame height are the important characteristics in external premixed combustion. This research’s aims were to discover the influences of N2 as it is the second most prevalent inhibitor in biogas by burning stoichiometric fuel mixtures (CH4 and N2 (0%-50% of fuel)) and oxygen in an experimental external premixed combustion burner whose nozzle tip diameter was 5 mm. The burner was connected to a hose from the oxygen tank and another hose from the fuel tank. Two regulators and flowmeters were placed on each tank to monitor the flow supplied to the mixer and burner. The valves were used to stop or open the fluid supply. The outcome flame propagation is then recorded by a high speed camera and then processed through a computer system. The results indicate that N2 influenced the flame angle, flame height and dimensionless flame height. The higher the N2 content inside the fuel, the shorter the flame height and the lower the dimensionless flame height. Moreover, increasing the N2 content created larger the flame angle.
The Journal of Applied Sciences Research | 2012
Willyanto Anggono; Ing Wardana; M. Lawes; Kevin J. Hughes; Slamet Wahyudi; Nurkholis Hamidi
Archive | 2013
Willyanto Anggono; Ing Wardana; M. Lawes; Kevin J. Hughes
Advanced Materials Research | 2014
Willyanto Anggono; Fandi Dwiputra Suprianto; Tubagus P. Wijaya; Michael S.C. Tanoto