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Iwan Kurniawan
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Riau, Indonesia
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Penurunan Kadar Air Madu Dengan Dehidator Vakum Johanes, Johanes; Kurniawan, Iwan; Yohanes, Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Vacuum dehydrator is an equipment that use to reduce water content in vacuum condition. The purpose of this experiment is to reduce water content of honey with pressure under 1 atm (vacuum condition) and heated. The heat controlled at 40oC. The experiment was done by reduce pressure until 7,385 kPa. It use time variable, those are 4, 8,12 hours. The result showed that at 12 hours experiment, get the lowest water content of honey is 18,18%. It lowest than 4 hours and 8 hours experiment result. Where initial water content before experiment is 23,2%. For a while, the resultof honey experiment at laboratory showed that water content of honey compactible with Indonesian Standard is less than 22%.Keywords : Vacuum Dehydrator, Honey, Heating Time
Analisis Efisiensi Jumlah Blade Pada Prototype Turbin Angin Venturi Silalahi, Yosef John Kenedi; Kurniawan, Iwan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The utilization of wind energy as electricity energy source is very limited in Indonesia. It is happened because velocity and wind direction that change. So it needs wind turbine that can be accommodate it, in particular during low wind velocity. Wind turbine  that made and researched is prototype of ventury wind turbine. It is very suitable to be used for low wind velocity with high rotation velocity. In addition, it also minimum of buzzing thas’s producted by wind turbine. This study has discussed about influence of twist angle variation of blade 300 and 450, blade quantity (3 blades, 4 blades, 5 blades and 6 blades) with wind velocity (2 m/s, 3 m/s, 4 m/s, 5 m/s) to shaft rotation of wind turbine prototype and tip speed ratio (TSR). The results showed that, in 3 m/s – 4 m/s wind velocity highest rotation of wind turbine shaft is compared with another variation has done, it found in wind turbine with 3 blades and 300 twist angle, they are 190 rpm and 311 rpm. In 5 m/s wind velocity, shaft rotation velocity of prototype of wind turbine 3 blades and 450 twist angle is the highest, 385 rpm. Meanwhile, in 2 m/s wind velocity, ventury wind turbine prototype with 6 blades and 450 twist angle has rotation velocity on highest shaft, it is 52 rpm. Keywords: Ventury wind turbine, twist angle, rotation shaft, TSR
Temperatur Sistem Pendingin Siklus Kompresi Uap Terhadap Perubahan Beban Pendinginan Dengan Penambahan Kondensor Dummy Sebagai Water Heater Ginting, Hardianto; Aziz, Azridjal; Kurniawan, Iwan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The vapor compression cycle of air conditioning has been used as conditioner in a room to get comfort condition. Conditioning air happened because the heat on room was absorped by evaporator (indoor unit). Usually, heat on condenser will be discarded. The wasted energy in condensor can be used as hot water by adding dummy condenser as complement. The dummy condensor would influence the cooling system temperature of compression cycle with change of cooling load in this research. This research was done experimentally. The result of experiment showed that temperature was about 61.70 0C for 120 minutes in performance. When cooling load was given to room, refrigerant temperature would get higher so that temperature of hot water would be higher too.Keywords : Air conditioning, water heater, dummy condensor, cooling load.
Eksperimental Variasi Kecepatan Putar Screw Feeding Dengan Kecepatan Putar PIsau Pengupas Terhadap Kualitas Hasil Pengupasan Pada Mesin Pengupas Kulit Pinang Hakim, Hasanul; Yohanes, Yohanes; Kurniawan, Iwan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The processing of areca nut at the present time is still done manually and requires a long working time. To facilitate the skinner process and optimize the results that required a technology of machine which paring the areca nut skin. The Skinner machine of areca nut at this point still has deficiency. For resolving the problems that exist on the areca nut skinner machine which has type of screw then troubleshoot by varying the rotational speed of the screw feeding toward skinner tool of areca nut. After tested with variations of the rotational speed of the screw feeding to ward skinner tool of areca nut, then obtained the optimal results as much as 6 pieces and other 4 pieces of areca nut already broken on screw feeding speed at 37 rpm and 800 rpm on a skinner tool. The time that required to perform the paring process on this rotational speed is 21.7 seconds. The optimal skinner Results of areca nut increases to 9 pieces after made the casing modification which the efficiency of time is 73.5%Key Words :Kernel of areca, optimalization, rotational of correlation, rotational speed,time
Kaji Komputational Karakteristik Aliran Air Gambut Pada Impeller Dan Volute Pompa Sentrifugal Julianto, Arie; Kurniawan, Iwan; Osman, Kahar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In order to fulfil the need for higher water supply, water from the swamp may be used as an alternative. If one is to use the usual clean water centrifugal pump to operate in swampy condition, problem such as decreased in the pump head maybe encountered. This study aims to explore the modifications needed to counter the mentioned problem. Pumps with number of blades from 7 to 10 are tested to obtain optimum operating conditions. Peat water pump design is used in the modelling using Computational Fluid Dynamics technique. The results show that the head deviation difference between CFD and theoretical calculations is -5.85 % for clean water and 0.4% for peat water. For best operating conditions, the number of blade that generates the best result is 10 with head and efficiency of 70.23 m and 0.63 respectively.Keywords: Peat Water, Computational Fluid Dynamics, Centrifugal Pump, Impeller, Volute
Kaji Eksperimental Rasio Diameter Turbin Angin Propeler Dengan Turbin Angin Venturi Terhadap Performa Turbin Angin Hybrid Irawan, Ricky; Kurniawan, Iwan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In this research carried out innovation in wind turbine that generate power using wind energy. Where the propeller wind turbine and the venturi wind turbine are combined into one axis. The purpose of this study was to determine the additional performance of the propeller wind turbine after combining it with the Venturi wind turbine at low wind speeds. The performance of this hybrid wind turbine is measured at each variation in the ratio of the blade diameter of the propeller turbine to the diameter of the venturi turbine. So that the optimal ratio of the ratio of the diameter between propeller wind turbines and venturi wind turbines to this lybrid wind turbine can be obtained. In this study, using three variations of the diameter ratio of the propeller wind turbine, namely 1, 1.2 and 1.4 with the number of 3 blades and the profile of the propeller wind turbine blade using the NREL S833 type. Then add the venturi wind turbine in front of the propeller wind turbine with 3 venturi turbine blades with a diameter of 30 cm. From the test results it is known that the addition of a venturi wind turbine to a small diameter propeller wind turbine has the greatest percentage increase in performance among the three variations of the propeller wind turbine diameter. Keywords: propeller wind turbine, venture wind turbine, hybrid wind turbine
Kaji Eksperimental Solar Chimney Power Plant (SCPP) Dengan Concentrating Lens Yang Disusun Dengan Pola Zigzag Dandi, Erico; Kurniawan, Iwan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Chimney Solar Power Plant (SCPP) is part of a form of solar thermal collector technology. SCPP has the working principle of absorbing solar thermal energy using a glass collector, then converting the hot air that flows into electrical energy through a turbine. Converging lenses can increase the output power. The function of the focusing lens can increase the intensity of light that will be received by the receiver so that the light beam received is greater than without a converging lens. This tool consists of 4 main components, namely: cover, collector, buffer and condensing lens. The support is made of reinforcing steel which is formed into a circle. The collector is made of concrete and painted black to absorb more heat and is circled. The collector is installed under the support and then a cover made of clear plastic is attached. At the top of the collector, a concentrate lens is installed. This study aims to determine the temperature increase that occurs in the solar collector using a concentrated lens and to determine the potential of the solar collector using a concentrated lens and without using a concentrated lens. The results of tests carried out on solar collectors show that solar collectors built without concentrating lenses can increase the air temperature and also increase the incoming air flow. The addition of a concentrated lens with a zigzag pattern gives the effect of increasing the temperature on the solar collector. So that through solar radiation, concentrated lenses can also improve the performance of solar collectors. The average wind power generated by a system without a concentration lens is 0.5W, with 21 concentrating lenses at 1.38W, and with 36 concentrating lenses at 1.56W. Keywords: SCPP, zigzag, concentrating lens, radiation, collector
Study Experimental Darrieus Type-H Water Turbines Using NACA 2415 Standard Hydrofoil Blade Wijaya, Rudi Kusuma; Kurniawan, Iwan
Jurnal Pendidikan Teknik Mesin Undiksha Vol 9, No 2 (2021)
Publisher : UNIVERSITAS PENDIDIKAN GANESHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v9i2.29257

Abstract

Telah dilakukan kaji eksperimental turbin air Darrieus tipe-H menggunakan blade hydrofoil standar NACA 2415 untuk mengetahui nilai torsi statik dan dinamik yang dihasilkan turbin air Darrieus tipe-H 3 blade dan 6 blade, pengujian menggunakan water tunnel dimensi 6m x 0.6m x 1m. Variasi tiga blade dan enam blade, dengan diameter turbin 0.44 m x 0.15 m pada turbin luar dan 0.18 x 0.14 m pada turbin bagian dalam, panjang chord 0.10 m dengan variasi sudut serang 0º sampai dengan 360º, variasi kecepatan air pertama 0.3 m/s, variasi kecepatan aliran air kedua 0.65 m/s. Kecepatan air 0.3 m/s enam blade, torsi statik 0.3 Nm, torsi dinamik nya 0.384 Nm, kecepatan air 0,65 m/s torsi dinamik 0.432 Nm dan torsi statik nya 0.384 Nm, pengujian turbin Darrieus tiga blade kecepatan air 0,3 m/s nilai torsi dinamik 0.336 Nm dan dengan kecepatan yang sama torsi statik nya 0.264 Nm. Pada kecepatan air 0.65 m/s nilai torsi dinamik sebesar 0.384 Nm, dan nilai torsi statik 0.336 Nm. Dari data hasil pengukuran tersebut dapat disimpulkan bahwa variasi turbin enam blade memiliki nilai torsi statik dan torsi dinamik yang lebih tinggi dari pada turbin tiga blade, jumlah blade sangat berpengaruh terhadap daya serap energi kinetik air untuk di konversikan menjadi torsi statik maupun torsi dinamik.Kata kunci : Turbin Hydrokinetic, Darrieus, Torsi Statik,Torsi DinamikAn experimental study of the H-type Darrieus water turbine was carried out using a standard NACA 2415 hydrofoil blade to determine the value of static and dynamic torque generated by the 3-blade and 6-blade Darrieus H-type water turbine, testing using a water tunnel dimensions of 6m x 0.6m x 1m. Variation of three blades and six blades, with a turbine diameter of 0.44 mx 0.15 m on the outer turbine and 0.18 x 0.14 m on the inner turbine, chord length 0.10 m with variations in angle of attack 0º to 360º, variation of first water velocity 0.3 m / s second water flow velocity 0.65 m / s. Water velocity 0.3 m / s six blades, static torque 0.3 Nm, dynamic torque 0.384 Nm, water velocity 0.65 m / s dynamic torque 0.432 Nm and static torque 0.384 Nm, Darrieus three blade turbine test water speed 0.3 m / s dynamic torque value of 0.336 Nm and with the same speed its static torque is 0.264 Nm. At 0.65 m / s water velocity, the dynamic torque value is 0.384 Nm, and the static torque value is 0.336 Nm. From the measurement data, it can be concluded that the six-blade turbine variation has a higher value of static torque and dynamic torque than the three-blade turbine, the number of blades greatly influences the absorption of water kinetic energy to be converted into static torque and dynamic torque. Keywords: Hydrokinetic Turbine, Darrieus, static torque, dynamic torqueDAFTAR RUJUKANKirke, B.K. (2011). Tests on ducted and bare helical and straight blade Darrieus hydrokinetic turbines, 36, pp.3013-3022Dominy, R., Lunt, P., Bickerdyke A., Dominy, J. (2007). Self-starting capability of a Darrieus turbine. Proc Inst Mech Eng (IMechE) ePart A: J Power Energy ;221: 111-120Decoste, Josh. (2004). Self-Starting Darrieus Wind Turbine. Department of Mechanical Engineering, Dalhousie University.Febrianto, A., & Santoso, A. (2016). “Analisa Perbandingan Torsi Dan rpm Tipe Darrieus Terhadap Efisiensi Turbin”. Fakultas Teknologi Kelautan, Institut Teknologi Sepuluh Nopember (ITS)Febriyanto, N. (2014). “Studi Perbandingan Karakteristik Airfoil NACA 0012 Dengan NACA 2410 Terhadap Koefisien Lift dan Koefisien Drag Pada Berbagai Variasi Sudut Serang Dengan CFD” Fakultas teknik, Universitas Muhammadiyah SurakartaSaputra, G. (2016). Kaji Eksperimental Turbin Angin Darrieus-H Dengan Bilah Tipe NACA 2415. Universitas Riau, JOM Teknik Mesin vol. 3 No. 1.Hafied, B. (2018). Kaji Eksperimental Torsi Statik Dan Torsi Dinamik Hidrokinetik Turbin Savonius Single Stage Type Bach Tiga Sudu. Tugas Akhir Teknik Mesin. Fakultas Teknik Universitas Riau.Hau, E. (2005). Wind Turbines:  Fundamentals, Technologies, Aplication, Economics. Springer.  Berlin.Kaprawi. (2011), Pengaruh Geometri Blade Dari Turbin Air Darrieus Terhadap Kinerjany. Prosiding Seminar Nasional AVoER ke-3 PalembangKhan, M. J., Bhuyan, G., Iqbal M. T., & Quaicoe J.E. (2009). Hydrokinetic Energy Conversion Systems and Assessment of Horizontal and Vertical Axis Turbines for River and Tidal: Applications A Technology Status Review. Applied Energy, 86, 1823-1835.Lain, S., & Osario, C. (2010). Simulation and Evaluation of a Sraight Bladed Darrieus Type Cross Flow Marine Turbine. Journal of Scientific & Research, Vol. 69 p.906-912Marizka, L. D. (2010). Analisis Kinerja Turbin Hydrokinetic Poros Vertical Dengan Modifikasi Rotor Savonius L Untuk Optimasi Kinerja Turbin.  Tugas Akhir Sains Fisika. FMIPA-Universitas Sebelas Maret.Malge, P. (2015).Analysis of Lift and Drag Forces at Different Azimuth Angle of Innovative Vertical Axis Wind Turbine.International Journal of Energy Engineering 4(5-8).Teja, P., D. (2017). Studi Numerik Turbin Angin Darrieus – Savonius Dengan Penambahan Stage Rotor Darrieus. Institut Teknologi Sepuluh Nopember, Surabaya.Zobaa, A. F., & Bansal, R. C. (2011). Handbook of Renewable Energy Technology. USA: World Scientific Publishing Co. Pte. Ltd.
Effects of Oil Palm Trunk (OPT), Peat and Coconut Shell Charcoal on the Characteristics of Biomass Pellet Muftil Badri; Dodi Sofyan Arief; Iwan Kurniawan
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 66 No 1 (2022): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1108.225 KB) | DOI: 10.36842/jomase.v66i1.277

Abstract

This paper presents an experimental study of mass percentage and pretreatment effect of oil palm trunk (OPT), and peat charcoal on energy parameters of biomass pellet. The density, calorific value, moisture and ash content of OPT biomass pellet has been developed and the experimental conditions in obtaining the energy parameters of OPT biomass pellet are discussed. The physical pretreatment was carried out by finely chopping OPT, peat charcoal, and adhesive and mixed in a predetermined composition. The manufacturing process of OPT biomass pellet was performed, the mass percentage of OPT and peat charcoal were varied. Type of test was performed on biomass pellet include density, calorific value, moisture and ash content. The influences of various parameters on the characteristics of biomass pellet were considered. The increase of mass percentage and pretreatment of peat charcoal has an effect on increasing the density, decreasing the calorific value of OPT biomass pellet, increasing the moisture content, and increasing the ash content of OPT biomass pellet. The mixture of coconut shell charcoal decreasing the density, increasing the calorific value, decreasing the moisture content, and decreasing the ash content of OPT biomass pellet. Biomass pellets from a mixture of OPT and coconut shell charcoal has a calorific value of 6649 cal/g, where the density was 1.15 g/cm3, the moisture content of 5.6%, and the ash content of 8.9%.
Produksi biocoal berbahan dasar tandan kosong kelapa sawit sebagai bahan bakar alternatif pada pembangkit listrik tenaga uap dengan metode torefaksi pada temperatur 200oC Awaludin Martin; Yogie Rinaldy Ginting; Iwan Kurniawan; Andika; Dhiki R. A.
Jurnal Teknik Mesin Indonesia Vol. 18 No. 1 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i1.424

Abstract

Coal fired steam power plants (CFSPP) are one of the industries that use fossil energy as a main fuel, causing fossil energy reserves are decreasing, for that the switchover of using fossil energy into new and renewable energy is necessary. To achieve the energy mix target, Indonesian Government through to Ministry of Energy and Mineral Resources was have the regulation to increasing the use of new and renewable energy through the co-firing method for steam power plants by utilizing biomass as a coal mixture. However, biomass from empty fruit bunches has several weaknesses as fuel and one of the weakness of empty fruit bunch is have a low heating value. Torrefaction method at 200oC is a method was use to increasing the heating value of biomass from empty fruit bunches. In previous research using the torrefaction method at a temperature of 200°C for 30 minutes obtained bio-coal with the highest mass yield and energy yield 78% and 96.11% with a heating value 4799.27 kcal/kg where the heating value is equivalent to the heating value of coal. This research is a continuation of previous research, where in the previous study the weight of sample of empty fruit bunch was only 1000 g, in this study the sample weight was varied up to 100 g with the same torrefaction method, namely with a temperature of 200°C and a torrefaction process time of 30 minutes using fixed bed reactor. The result of this research is bio-coal with the highest calorific value of fuel at 6,253 kcal/kg with a mass variation of 1000 g.
Co-Authors Abdurrahaman, Ridwan Agusta, Dhiky Rahman Amir Hamzah Amir Hamzah Andika Atikah Purwantari Awaludin Martin Azridjal Aziz Dalil, Mohammad Dandi, Erico Dhiki R. A. Dodi Sofyan Arief, Dodi Sofyan Eldhy Susetio Elvi Yenie, Elvi Farhan, A Ginting, Hardianto Ginting, Yogie Rinaldy Hafidawati, Hafidawati Hakim, Hasanul Heri Siswanto Ida Zahrina Johanes Johanes, Johanes Julianto, Arie Khotimah, Nur Kusuma, Andi Arief Muftil Badri Osman, Kahar Romy Romy SATRIYAS ILYAS Setiaries, Vonny Tengku Firly Musfar, Tengku Firly Wijaya, Rudi Kusuma Yohanes Yohanes Yosef John Kenedi Silalahi