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All Journal Rekayasa Mesin Journal of Engineering and Management in Industrial System Journal of Environmental Engineering and Sustainable Technology Jurnal Teknik Pengairan: Journal of Water Resources Engineering ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Mechanical Engineering Science and Technology ALCHEMY Jurnal Penelitian Kimia PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) Mekanika: Majalah Ilmiah Mekanika Jurnal ABDINUS : Jurnal Pengabdian Nusantara TECHNO-SOCIO EKONOMIKA Nusantara Science and Technology Proceedings International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Journal of Multidisciplinary Applied Natural Science
Denny Widhiyanuriyawan
Brawijaya University
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Pengaruh Variasi Sudut Static Mixer Terhadap Kinerja Heat Exchanger Widhiyanuriyawan, Denny; Purnami, Purnami; Ardiansyah, Ardiansyah
Rekayasa Mesin Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.118 KB)

Abstract

This study was proposed to determine the effect of static mixer on innertube installation of double pipe heat exchanger. The dimenssion of outer (hot fluid) and inner (cold fluid) pipes of heat exchanger were 76.2 mm and 25.4 mm, respectively. Static mixers with 19 mm diameter and 60 pieces number were variated with θ=40o, 80o, and120o. The hot fluid discharges were variated from 400 to 900 liters/hour and the constant of cold fluid discharge with 900 liters/hour. The results show the heat transfer rate of statics mixer with angle variation higher than plain tube (without static mixer).The heat transfer increased 24%, 39%, and 44% for variation angel of static mixer with θ=40o, 80o, and 120o, respectivelly.Keywords: Static mixer, heat transfer rate
Pressure Drop dan Pola Aliran Dua Fase (Air-Udara) Melewati Pipa Groove Vertikal Aji, Supa Kusuma; Widhiyanuriyawan, Denny; Yuliati, Lilis
Jurnal Rekayasa Mesin Vol 11, No 3 (2020)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2020.011.03.7

Abstract

This research was conducted to observe the effect of adding grooves in the two-phase flow of water-air in the same direction through a vertical pipe to changes in pressure and fluid flow patterns. Test section in the form of pipes with grooves made of acrylic material with a length of 100 cm and an internal diameter of 2.54 cm. The geometric shape of the acrylic pipe is modified by giving a groove in the direction of the pipe along the test section. Grooves used amounted to 4 and 16 and pipes without grooves used as a comparison. Tests are carried out by flowing water and air that has been mixed through the inlet side upward. The ratio of air velocity to water velocity (VG / VL ) is 0.24-1.13. The method used in this study is experimental. Retrieval of pressure drops data is done by using a differential pressure transmitter. Visual observations are also made using a DSLR camera equipped with a flash and video observations using a smartphone with slow-motion mode. The results showed changes in flow patterns and pressure drop values. Slugs in pipes with grooves disappear faster and pressure drops are lower than pipes without grooves.
Revitalisasi Pembangkit Listrik Mikrohidro (PLTMH) Desa Selur Untuk Mendukung Kawasan Wisata Denny Widhiyanuriyawan; Pitojo Juwono; Runi Asmaranto; Sugiarto
DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) Vol 5 No 2 (2021)
Publisher : Politeknik Negeri Madiun

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Abstract

Air Terjun Sunggah di Desa Selur merupakan salah satu destinasi wisata alam yang ada di wilayah Ponorogo selatan. Pemandangan alamnya yang indah, dikelilingi hutan dan persawahan terasering yang eksotik menarik minat wisatawan untuk berkunjung. Namun keelokan alam masih belum didukung oleh sarana dan prasaran penunjang yang memadai. Akses jalan menuju lokasi adalah jalan cor beton dengan lebar 3,5 m, sehingga tidak bisa digunakan untuk berpapasan mobil. Meskipun infrastruktur jalan sepanjang 2 km menuju lokasi sudah diperkuat cor beton, namun di area wisata air terjun belum dilengkapi prasarana wisata yang representatif bagi pengunjung sehingga belum mampu memanjakan wisatawan. Salah satu kendala yang dihadapi masyarakat desa Selur terkait upaya mengembangkan wisata air terjun sunggah adalah ketersediaan sumber energy sebagai pendukung pengembangan kawasan wisata dan kebutuhan pendanaan yang berkelanjutan untuk mendukung aktifitas berkelanjutan kawasan wisata tersebut. Melihat kondisi ini Tim Doktor Mengabdi LPPM Universitas Brawijaya mengajak masyarakat dan Pemerintah Desa Selur berkolaborasi dan mensinergikan kegiatan bersama membangun kawasan wisata alam di desa Selur. Tim DM UB menawarkan solusi untuk menyediakan energy mandiri di kawasan wisata air terjun Sunggah sekaligus menggali dana dari sumber energy yang dibangun. Kegiatan yang dilakukan oleh Tim DM UB bersama pemerintah desa dan masyarakat Selur di tahun 2020 ini adalah memperbaiki dan merekondisi pipa air diameter 16 inchi sepanjang 25 meter menuju pipa pesat agar tidak mengganggu peruntukan air irigasi masyarakat mengingat topografi medan saluran pengambilan cukup sulit jika digunakan saluran terbuka. Diharapkan rekondisi saluran pembawa ini dapat meningkatkan PLTMH dengan kapasitas 20 kW.
UPAYA MEMINIMALKAN NON VALUE ADDED ACTIVITIES PRODUK MEBEL DENGAN PENERAPAN METODE LEAN MANUFACTURING Achmad Misbah; Pratikto Pratikto; Denny Widhiyanuriyawan
Journal of Engineering and Management in Industrial System Vol 3, No 1 (2015)
Publisher : Badan Penerbit Jurnal, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (444.812 KB) | DOI: 10.21776/ub.jemis.2015.003.01.8

Abstract

Abstract The development of the furniture industry today is getting tougher so that businesses are required to make improvement and increase its performance thus able to grow and compete, one of them is CV. KOKOH is a company that manufactures, study chair covers, windows sills, doors, cabinets, tables, etc., by applying the make to order system. The focus of this research study on the seat due to dominate demand for these products amounted to 60% of all types of products manufactured. The purpose of this study is to identify waste and to analyze the causes of waste that occurs in the production process chair learning approach by using the tools of lean manufacturing value stream mapping (VSM), value stream analysis tools (VALSAT) and failure mode and affects analysis (FMEA). The result is that based process mapping activity, which belong to the value adding activity Is operating with a requirement for 6.840 second or as many as 45 activity or by 58,34%, necessary but non-value added activity is the activity of transportation and inspection needs 2.505 seconds or as much as 23 activity or by 21,37% as well as belonging to the non value adding activity is the activity of storage  and delay with the time requirements of 2.380 Seconds or as much as 34 activity or by 20,29% of the total time and decrease production time of 138,4 minutes into 11723,93 seconds occur time reduction of production lead time process for 9347 seconds whit a decrease in the amount of 79.72%.
THE INTEGRATION OF OVERALL EQUIPMENT EFFECTIVENESS (OEE) METHOD AND LEAN MANUFACTURING CONCEPT TO IMPROVE PRODUCTION PERFORMANCE (CASE STUDY: FERTILIZER PRODUCER) Adi Yermia Tobe; Denny Widhiyanuriyawan; Lilis Yuliati
Journal of Engineering and Management in Industrial System Vol 5, No 2 (2017)
Publisher : Badan Penerbit Jurnal, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (596.615 KB) | DOI: 10.21776/ub.jemis.2017.005.02.7

Abstract

High machine downtime and large number of rejected products is still become a big problem for company as a research object in this study. Overall Equipment Effectiveness (OEE) is one of the methods used to measure the effectiveness of a machine with three measurement factors, namely; availability rate, performance rate, and quality rate. The integration of OEE measurement and lean manufacturing analysis method is employed to improve production system in company. The measurement result shows that the value of availability rate is 88.82%, performance rate 93.70%, and quality rate 98.20%; then the OEE values obtained 81.73%. The root cause is investigated by using FMEA (Failure Mode and Effect Analysis) method particularly from the RPN (Risk Priority Number).
EFFECT OF VENTURI DIAMETER OF CARBURETOR ON PERFORMANCE OF SIX-STROKE 125 CC COMBUSTION ENGINE Eko Siswanto; Agung Sugeng Widodo; Nurkholis Hamidy; Denny Widhiyanuriyawan; Gilang Rausan Fikri Noor
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (723.591 KB) | DOI: 10.21776/ub.jeest.2016.003.01.3

Abstract

Performance of six stroke single power combustion engine affected by venturi diameter of carburetor is presented. This study is to begin on development of six-stroke single power of combustion engine (CE). Developing of this six stroke CE is based on addition of duration on both mass- and thermal diffusion, and on mixing time before the combustion. Evaluation of the six-stroke CE performance is done via enlarge venturi diameter of carburetor. Selected venturi diameters are 18 (mm) and 20 (mm). Fuel of the CE is gasoline-based using research octane number (RON) of 92. Interval of each ascending rotation speed is 400 (rpm), and observation was done using a constant throttle aperture 30 (%). The observed performances of the 125 (cc) six-stroke CE is then compared using a convensional four-stroke 125 (cc), as well. It informs that diameter 20 (mm) can increase average of about 21(%) on torsion, 21 (%) on power, 16 (%) on specific fuel consumption (SFC), and 23 (%) on thermal efficiency to that of the diameter 18 (mm). If compared to four-stroke CE, the six-stroke CE has lower in SFC and thermal efficiency, however, it has higher in average value of torsion, power, and engine speed, respectively about 15 (%).   
The Effect of Electrode Gap Distance on Brown's Gas Tria Puspa Sari; Denny Widhiyanuriyawan; Radissa Dzaky Issafira; Wahyu Dwi Lestari; Ndaru Adyono; Wiliandi Saputro; Ahmad Khairul Faizin
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

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Abstract

The electrolysis of water is one of many methods to produce hydrogen by converting electrical and thermal energy into hydrogen and oxygen. In this study, a generator of the HHO dry cell type is used to produce brown gas. Brown’s gas consists of two hydrogens and one oxygen or Oxyhydrogen (HHO). Observation will be conducted to obtain the effect of electrode gap distance to increase the productivity of Brown’s Gas with a mixture of 2500 ml pure water and catalyst of NaHCO3. The results show that if the electrode gap is small, it will produce more brown gas than the long gap. However, research still needs to be done on how close the electrode gap distance is needed to produce maximum brown gas.
Nanofiber Semiconductor Experiment with Distance Variation Electrospinning Method to Improve DSSC Performance Denny Widhiyanuriyawan; Zainal Arifin; Syamsul Hadi; Muhammad Rijalul Fadli
Mekanika: Majalah Ilmiah Mekanika Vol 21, No 1 (2022): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v21i1.51479

Abstract

Dye-Sensitized Solar Cell (DSSC) is a type of solar cell that uses dyes to transfer sunlight to electrical energy. DSSC construction uses a layered system (sandwich) that consisting of a working electrode and an opposing electrode, both of which are placed on conducting glass and electrolytes to allow electron cycling. This research aims to determine the effect of the distance between the tip and the rotating collector in an effort to increase the efficiency of Dye-Sensitized Solar Cell (DSSC) and examine its impact on the morphology of the ZnO nanofiber. This experiment is carried out by varying the distance between the tip to the rotating collector, which are 4 cm, 6 cm, and 8 cm. The results of this research indicates that at a distance of 8 cm it produces a small, uniform and regular ZnO nanofiber structure with Voc, Jsc, FF, and DSSC efficiency values of 0.559 V, 9.809 mA / cm2, 43.3% and 2.3%. In addition, at a distance of 8 cm it also produces the highest DSSC electrical efficiency from the other distances due to the absorbance of the dye and high electron excitation.
The Influence of the Mass Fraction of Catalyst for Oxy-Hydrogen (HHO) Production on the Dry Cell Type of HHO Generator Tria Puspa Sari; Denny Widhiyanuriyawan; Amajida Sadrina; Ramadan Bimo Anggoro; Rahadi Agung Raharjo; Ryan Rizaldi
Nusantara Science and Technology Proceedings 3rd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2022.2751

Abstract

One alternative energy that can e developed in the future is water. The water can produce future fuels, namely hydrogen and oxy-hydrogen, through the electrolysis of water. Electrolysis of water is one way to produce hydrogen into electrical and thermal energy conversion of hydrogen and oxygen. This study used a dry cell type HHO generator to produce Oxy-hydrogen. Oxy-hydrogen consists of two hydrogens and one oxygen or Oxy-hydrogen (HHO). Carried out to determine the optimal performance of the mass fraction of the catalyst on the productivity of Oxy-hydrogen by mixing 2500 ml of air and NaHCO3 as a catalyst. The observed mass catalyst fractions were 0.69, 1.38, 1.77, 2.15, 5 7.5, 10, and 15%. The results showed that the best Oxy-hydrogen production performance using a catalyst was 10% catalyst mass fraction with a production rate of 0.02250 l/s with an efficiency of 36.98%.
PENGARUH LAJU ALIR TUNGSTEN IN-ERT GAS TERHADAP KEKUATAN TARIK DAN KEJUT PADA SAMBUNGAN LAS TIG BAJA GALVANIS DAN ALU-MINIUM 5052 DENGAN FILLER AL-SI 4043 Redi Bintarto; Moh. Syamsul Ma’arif; Denny Widhiyanuriyawan; Teguh Dwi Widodo; Rudianto Raharjo; Nugroho Adi Purnomo
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.656

Abstract

This study aims to determine the effect of the protective gas flow rate on the tensile and shock strength of welded joints of dissimilar metals, namely aluminum 5052 – galvanized steel with Al-Si 4043 filler using argon gas as a shielding gas. The protective gas flow rate parameters used in this study were 14, 17, and 20 liters/minute with a current of 80 A. The results showed that the higher the flow rate of the shielding gas, the lower the porosity defects that occurred in the welding results, resulting in higher tensile and shock strength values. Based on the analysis through the results of penetrant testing, it shows that the addition of the protective gas flow rate is given to reduce the porosity defects in the welding area. The surface area experiencing porosity decreases with the addition of the protective gas flow rate of 14, 17, and 20 liters/minute of 59.748%, 50.918%, and 48.857% respectively. The highest tensile strength was obtained from welding with a protective gas flow rate of 20 liters/minute of 20.01 MPa, then a protective gas flow rate of 17 liters/minute of 16.32 MPa, and the lowest at a protective gas flow rate of 14 liters/minute of 10 ,44 MPa. The highest shock strength is obtained from welding with a protective gas flow rate of 20 liters/minute of 0.5644 mJ/mm2, then a protective gas flow rate of 17 liters/minute of 0.4048 mJ/mm2, and the lowest is a gas flow rate protection 14 liters/minute of 0.2981 mJ/mm2.  
Co-Authors Achmad Misbah Adi Yermia Tobe Agung Sugeng Widodo Agung Sugeng Widodo Ahmad Khairul Faizin Aji, Supa Kusuma Alamsah, Azwar Amajida Sadrina Anggara Wiyono Wit Saputra, Anggara Wiyono Wit ARDIANSYAH ARDIANSYAH Ari Wahjudi Asroful Anam Astak, Muh Anjas Bambang Poerwadi Candra Trimandoko, Candra de Fretes, Henry Valentino Desyandri Desyandri Dida, Hero P Djoko Sutikno Dody Candra Kumara, Dody Candra Eko Siswanto Faruq Syah Permana Putra Gilang Rausan Fikri Noor I Nyoman Gede Wardana Ikhwanul Qiram Ilhan Junio Trizardi ING Wardana ING. Wardana, ING. Khairil Anwar Langgeng Setyono, Langgeng Lilis Yuliati M. Ruslin Anwar Mahfita Ardyarum Mangku Purnomo Mariki, I Wayan Wawan Mega Nur Sasongko Mietra Anggara Moh. Syamsul Ma’arif Moon, Park Jae Muhammad Rijalul Fadli Nabila Widadudari Nasirotul Wildah Ndaru Adyono Nugroho Adi Purnomo Nugroho, Arief Budi Nur Aini Uwar Nurkholis Hamidi Nurkholis Hamidy Pitojo Juwono Pratikto, Pratikto Purnami Purnami Radissa Dzaky Issafira Rahadi Agung Raharjo Ramadan Bimo Anggoro Ramang Magga Redi Bintarto Roymons Jimmy Dimu Rudianto Rudianto Rudy Soenoko Runi Asmaranto Rustan Hatib Ryan Rizaldi Slamet Wahyudi Sonief, A. As’ad Sudjito Soeparman Sugiarto Sugiarto S Sugiono Sugiono Supriyono Supriyono Syamsul Bahri La Muhaya, Syamsul Bahri Syamsul Hadi Teguh Dwi Widodo Tjuk Oerbandono Tria Puspa Sari Tulus Subagyo, Tulus Ulya Ahda Yustisia Wahyu Dwi Lestari Wardoyo Wardoyo Wicaksono, Hangga Widya Wijayanti Wijono Wijono Wiliandi Saputro Zainal Arifin Zulkifli Kurniawan