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All Journal Jurnal Teknik Mesin Jurnal Energi Dan Manufaktur Jurnal Teknosains Rekayasa Mesin Dinamika Teknik Mesin JURNAL INTEGRASI Jurnal POLIMESIN Logic : Jurnal Rancang Bangun dan Teknologi Bhakti Persada Jurnal Aplikasi IPTEKS EPI International Journal of Engineering JAMETECH

Putu Wijaya Sunu

Politeknik Negeri Bali

Author-ID : 2995848

Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Other

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Characterization of Aluminum Matrix Metal Composite Hybrid Reinforced With SiCw/(Al2O3-Mg) on Thermal Conductivity and Hardness Suarsana, Ketut; Soenoko, Rudy; Negara, DNK Putra; Sunu, P.W.
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.01.18

Characteristics of composite materials that are light, strong, heat resistant, and high hardness are needed in their application. This study aims to obtain a hard material and good heat conductivity, with the innovation of making aluminum matrix composites (AMC) from aluminum powder as a matrix, combined with silicon-carbon whisker (SiCw) and alumina particles (Al2O3p), and adding Magnesium through the powder process metallurgy. The method of making composites was carried out by means of powder metallurgy. The research variables composition I, II, and II with Al/(SiCw+Al2O3/Mg), were given temperature treatment: 500, 550, and 600oC. The test results show that there is an increase in the mechanical properties of the composites both from variations in composition and also from variations in treatment temperature because the bond resulting from the addition of Al2O3 reinforcement has hard and fine grain properties. The physical and mechanical properties of the test results are in the form of the highest density at composition I, 600oC (2,699 gr/cm3) while the hardness at composition III is 600oC (42,438 HV) and heat conductivity at composition III, 600oC (185,183 Watt/m.oC). Scanning with SEM showed that the pore size decreased from the treatment temperature of 500oC to 600oC due to phase changes and a stronger bond between the matrix and the reinforcement. So that the influence of composition and temperature will affect the thermal conductivity, hardness, and density of the composites.

Characteristics of Active Carbon from Utilization of Red Chili Trees (Capsicum annuum L) Ni Made Dwidiani; Putu Wijaya Sunu; Gusti Ngurah Nitya Santhiarsa
EPI International Journal of Engineering Vol 2 No 1 (2019): Volume 2 Number 1, February 2019 with Special Issue on Composite Materials & Stru
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022019.03

This work studies the use of red chilli tree (capsicum anuumm L) waste as material of activated carbon and examines the morphological structure and elemental composition of the activated chili trees. The morphological structure was measured at TekMIRA (Pusat Penelitian dan Pengembangan Teknologi Mineral dan Batubara, Bandung) by using the scanning electron microscope (SEM), and the composition of the elements of carbon, hydrogen, nitrogen and ash is determined by the ultimate testing analysis with the ASTM D5373 standard. In the testing procedure, activated carbon is made from red chili tree waste by dehydration with a temperature of 2000 C for 1 hour and carbonized with a temperature of 3750 C for 1 hour. Then, the chemical activation (NaOH) is made in variation of concentration of 1%, 3%, and 5% with soaked time 24 hours, and dried at 2000 C for one hour. The carbonization at a concentration of 1% (NaOH) gave the best result on activated carbon from red chili trees.

Dinamika Pusat Rotasi Fluida pada Proses Difusi Penggabungan Vorteks Putu Wijaya Sunu
Jurnal Teknik Mesin Vol. 10 No. 1 (2008): APRIL 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

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This research aims to analyze effect of vortex position at center of fluid gyration on diffusion process of vortex merging. This research was done experimentally in a water tank. Vortex was generated with suck fluid through a channel at underside of tank with pump. The distance of the vortex to center of gyration was varied as 4, 6, 8, 10 cm. Data taken with measuring each vortex radius and distance of vortex separation. The result of research showed that vortex residing in centered of fluid rotation has longer diffusion time compared with vortex residing eccentrically and it becomes dominant vortex in process of merging. This matter caused by existence of conservation of angular momentum and influence of shear stress during rotation of vortex. Increase of distance of vortex separation will cause increase diffusion time so that the transport phenomenon will be predominated by diffusion process. Abstract in Bahasa Indonesia: Penelitian ini bertujuan menganalisis pengaruh posisi vortex pada pusat rotasi fluida terhadap proses difusi penggabungan vortex. Penelitian ini dilakukan dengan metode eksperimen pada sebuah tangki air. Vortex dibangkitkan dengan menghisap fluida melalui saluran pada bagian bawah tangki dengan pompa. Pengujian dilakukan dengan memvariasikan jarak terhadap pusat rotasi yaitu 4, 6, 8, 10 cm. Data diambil dengan mengukur radius masing-masing vortex dan jarak kedua vortex. Hasil penelitian menunjukan bahwa vortex yang berada dipusat perputaran fluida memiliki waktu difusi yang lebih panjang dibandingkan vortex yang eksentris dan menjadi vortex dominan dalam proses penggabungan. Hal ini disebabkan adanya kekekalan momentum angular dan pengaruh tegangan geser selama rotasi vortex. Peningkatan jarak kedua vortex akan menyebabkan peningkatan waktu difusi sehingga transport fenomena akan didominasi oleh proses difusi. Kata kunci: Penggabungan vortex, waktu difusi, jarak vortex.

ANALISIS PERBANDINGAN PEMASANGAN SIRIP PADA PIPA BERGETAR TERHADAP PERPINDAHAN PANAS Putu Wijaya Sunu
Jurnal Energi Dan Manufaktur Vol 3, No.1 Juni 2008
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (64.316 KB)

Karakteristik temperatur fluida dingin pada grooved double pipe heat exchanger Putu Wijaya Sunu; I Putu Darmawa; Anak Agung Ngurah Bagus Mulawarman; I Made Suarta; I Putu Gede Sopan Rahtika
Jurnal Teknosains Vol 10, No 1 (2020): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.43291

Heat exchangers have widespread applications in many industrials process. There are many kind of heat exchanger. One of the simply heat exchanger is double pipe heat exchanger. The need for lightweight and enhancing the heat transfer of heat exchanger accomodated by surface engineering. One of the surface passive technique applications is groove. Incising groove in pipe as concerned wide consideration as it need no additional power, decrease in weight of system and hence give more benefit in heat transfer. The characteristics of heat transfer in grooved double pipe heat exchanger was investigated experimentally in this article. The aim of this investigation is to reveal the phenomenon of temperature characteristics of cold fluid in the heat transfer process in the grooved double pipe heat exchanger. In this study, water are used as both hot and cold fluid with counter flow pattern, and the water flow rate equal to 15 lpm for both fluid. Grooves were incised on the annulus area in the outer wall of tube side with rectangular shape and circumferential pattern. The characteristics of groove dimension that are height of groove is 0,3 mm; distance between grooves is 8 mm; and the groove space which is as independent variables are 1 mm and 2 mm. The data from 1 mm and 2 mm grooves space were compared with no grooved double pipe heat exchanger data (smooth pipe). The hot fluid temperature is 50 ± 0,50C while the cold fluid temperature is 30 ± 0,50C. The temperature data on the inlet and outlet side of heat exchangers for smooth pipe, 1 mm and 2 mm groove space were compared to find out the characteristics of increasing cold fluid temperature. This study used the temperature rate and temperature acceleration method to compare the variables. The result shows that groove installation increases the amount of heat absorbed by cold fluid. The heat exchanger with 1 mm groove spaces, was able to absorb heat about ± 2.3 % better than heat exchanger with 2 mm groove space and 13,1 % better than heat exchanger with no groove.

Experimental Investigation on the Effect of Angles of Attack to the Flutter Speed of a Flat Plate in Axial Flow I Putu Gede Sopan Rahtika; I Made Suarta; I Komang Rusmariadi; Putu Wijaya Sunu
Logic : Jurnal Rancang Bangun dan Teknologi Vol 21 No 2 (2021): July
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v21i2.2630

The application of flat plates to the field of wind harvesting requires a lot of research toward the understanding of the flutter behavior of the plates. There are shortages of articles that discuss the effect of varying the angles of attack to the flutter speed of a flat plate. This research aims to conduct a basic experimental research on the effect of relative position of a thin-flat plates to the direction of the air flow to its flutter speed. In this study, a thin-flat plate was placed in a subsonic wind tunnel to test its flutter speed. The position of the plate was varied in various angles of attack. The effect of the angles of attack to the flutter speed was observed.

RANCANG BANGUN PURWARUPA TEKNOLOGI MIKROHIDRO MENGGUNAKAN KONSEP HIDRO FLUTTER I P G Sopan Rahtika; I Made Suarta; Putu Wijaya Sunu
JURNAL INTEGRASI Vol 11 No 1 (2019): Jurnal Integrasi - April 2019
Publisher : Politeknik Negeri Batam

The decline of the world oil reserves is a global crisis for decades to come. The search for renewable energy alternatives is an urgent topic of current research trends. Indonesia has an abundance of energy availability in the form of potential microhydro development. This research is a research of development of new innovative technology in microhydro technology in the form of conversion technique of water flow energy into electric energy using hydro flutter technology. In this research, the development of new tool to convert energy from water flow into electrical energy was developed. A prototype was built that can extract energy from the water stream at times into mechanical energy ready for conversion into electrical energy using the hydro flutter principle of a flexibly mounted free leading edge cantilevered rigid plate. The advantages of the new concept are the simplicity of the design and the ability to clean the system by itself, thereby reducing the maintenance costs.

PENINGKATAN PERPINDAHAN PANAS PADA FAN COIL UNIT (FCU) DENGAN NANOPARTI Al2O3 Daud S. Anakottapary; I N Sutarna; Putu Wijaya Sunu; I Made Rasta
JURNAL INTEGRASI Vol 11 No 1 (2019): Jurnal Integrasi - April 2019
Publisher : Politeknik Negeri Batam

Experimental studies on Fan Coil Unit (FCU) were conducted to investigate heat transfer characteristics due to the addition of Al2O3 nanoparticles. The aims of this study was to reveal the phenomenon of nanofluid particle influences on heat transfer performance indicators. This investigation used tube and fin FCU type with cold fluid is water-Al2O3 nanofluid and hot fluid is ambient air. The cold fluid volume flow rate is 15 lpm and the hot fluid mass flow rate is 0.48 kg/s. The concentration of nanoparticles was 0.1%. The ambient air temperature inlet of FCU is 28 ± 0,50C while the cold fluid temperature entering the FCU is 19 ± 0,50C. In this study the performance parameters on cold fluid with nanoparticles were compared with no nanoparticles. The results showed that the small addition of nanoparticles in cold fluid increased heat transfer in FCU by 9.2%.

PERAN PENGELOMPOKAN MOLEKUL PADA HYDROUS ETANOL TERHADAP KINERJA MESIN I Made Suarta; I Putu Gede Sopan Rahtika; Putu Wijaya Sunu; Ketut Bangse; I Nengah
JURNAL INTEGRASI Vol 11 No 1 (2019): Jurnal Integrasi - April 2019
Publisher : Politeknik Negeri Batam

In this study observed the role of molecular clustering on engine performance produced by hydrous ethanol fuel (95.5% v). The test was performed using variation load for four-cylinder motor. Engine performance is measured using Brake Power Engine load cell type indicator TD 800PM. The engine performance produced by anhydrous ethanol was also tested. The resulting engine performance of both fuels is compared. The results showed that the power produced by hydrous ethanol was slightly higher than that of anhydrous ethanol. The charging effisiency generated by hydrous ethanol is upper than that of anhydrous ethanol.

MEKANISASI BUDIDAYA JAMUR TIRAM PUTIH UNTUK MENINGKATKAN KAPASITAS PRODUKSI PETANI Made Rasta; Putu Wijaya Sunu; I Wayan Adi Subagia; I K Widana
Bhakti Persada Jurnal Aplikasi IPTEKS Vol 4 No 2 (2018): November 2018
Publisher : P3M Politeknik Negeri Bali

Mushrooms are one type of food that needs attention regarding community food security. White oyster mushroom (Pleurotus ostreatus) is currently quite popular and much loved by the public because of its delicious taste and high nutritional value. Aside from being a food ingredient, oyster mushrooms are also useful as health or medicine. White oyster mushroom cultivation is one of the agribusiness businesses that have a large business opportunity because it has an increasing economic value. Pleurotus ostreatus is known as a fungus that is easily cultivated and is widely developed on wood substrate media that has been packaged in plastic bags and then incubated and maintained in a contact house. On the other hand, the presence of mushroom commodities in the market is still scarce, the scarcity of mushrooms due to the lack of mushroom cultivation producers and the activity of mushroom production is not optimal. Partner problems are an understanding of innovation and technology that supports and can help ease the work of mushroom cultivation to increase production is still limited. The aim to be realized from this activity is to strengthen and increase the capacity of innovation and technology in mushroom cultivation so that the productivity and economy of mushroom farmers can be increased. In order to overcome these obstacles an automatic temperature and humidity regulation system, baglog press machine and training on machine operation and marketing management are carried out. The results of the Community Partnership Program (PKM) activities are the availability of mushroom house temperature and humidity control machines, baglog press machines. So that is expected to increase production and have an impact on the economy of mushroom farmers that are getting better.

Co-Authors A.A.A. Triadi Anak Agung Ngurah Bagus Mulawarman Asrori Asrori Daud Simon Anakottapary Dewa Ngakan Ketut Putra Negara I Dewa Made Susila I G.K. Abasana I Gusti Agung Bagus Wirajati I Gusti Ngurah Nitya Santhiarsa I K Widana I Ketut Suarsana I Komang Rusmariadi I Made Rasta I Made Suarta I Made Suarta I Made Suarta I N Sutarna I Nengah I Nengah Ardita I Nyoman Suamir I Nyoman Suparta I Putu Darmawa I Putu Gede Sopan Rahtika I Wayan Adi Subagia I.G.P.A. Suryawan Ida Ayu Gede Bintang Madrini Ketut Bangse Kris Witono Made Rasta Ni Kadek Muliati Ni Made Dwidiani Rudy Soenoko Sugeng Hadi Susilo

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