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All Journal Buletin Udayana Mengabdi Jurnal Energi Dan Manufaktur International Journal of Renewable Energy Development Jurnal Mechanical Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Dinamika Teknik Mesin International Journal of Engineering and Emerging Technology International Journal of Renewable Energy Development
I.K.G. Wirawan
Mechanical Engineering Department, Udayana University, Bali
Automotive Engineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Premixed Combustion of Kapok (ceiba pentandra) seed oil on Perforated Burner Wirawan, I.K.G.; Wardana, I.N.G.; Soenoko, Rudy; Wahyudi, Slamet
International Journal of Renewable Energy Development Vol 3, No 2 (2014): July 2014
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.3.2.91-97

Abstract

Availability of fossil fuels in the world decrease gradually due to excessive fuel exploitation. This situations push researcher to look for alternative fuels as a source of renewable energy, one of them is kapok (ceiba pentandra) seed oil. The aim this study was to know the behavior of laminar burning velocity, secondary Bunsen flame with open tip, cellular and triple flame. Premixed combustion of kapok seed oil was studied experimentally on perforated burner with equivalence ratio (φ) varied from 0.30 until 1.07. The results showed that combustion of glycerol requires a large amount of air so that laminar burning velocity (SL) is the highest at very lean mixture (φ =0.36) in the form of individual Bunsen flame on each of the perforated plate hole.  Perforated and secondary Bunsen flame both reached maximum SL similar with that of ethanol and higher than that of hexadecane. Slight increase of φ decreases drastically SL of perforated and secondary Bunsen flame. When the mixture was enriched, secondary Bunsen and perforated flame disappears, and then the flame becomes Bunsen flame with open tip and triple flame (φ = 0.62 to 1.07). Flame was getting stable until the mixture above the stoichiometry. Being isolated from ambient air, the SL of perforated flame, as well as secondary Bunsen flame, becomes equal with non-isolated flame. This shows the decreasing trend of laminar burning velocity while φ is increasing. When the mixture was enriched island (φ = 0.44 to 0.48) and petal (φ = 0.53 to 0.62) cellular flame take place. Flame becomes more unstable when the mixture was changed toward stoichiometry.
Premixed Combustion of Coconut Oil on Perforated Burner Wirawan, I.K.G.; Wardana, I.N.G.; Soenoko, Rudy; Wahyudi, Slamet
International Journal of Renewable Energy Development Vol 2, No 3 (2013): October 2013
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2.3.133-139

Abstract

Coconut oil premixed combustion behavior has been studied experimentally on perforated burner with equivalence ratio (φ) varied from very lean until very rich. The results showed that burning of glycerol needs large number of air so that the laminar burning velocity (SL) is the highest at very lean mixture and the flame is in the form of individual Bunsen flame on each of the perforated plate hole. As φ is increased the  SL decreases and the secondary Bunsen flame with open tip occurs from φ =0.54 at the downstream of perforated flame. The perforated flame disappears at φ = 0.66 while the secondary Bunsen flame still exist with SL increases following that of hexadecane flame trend and then extinct when the equivalence ratio reaches one or more. Surrounding ambient air intervention makes SL decreases, shifts lower flammability limit into richer mixture, and performs triple and cellular flames. The glycerol diffusion flame radiation burned fatty acids that perform cellular islands on perforated hole.  Without glycerol, laminar flame velocity becomes higher and more stable as perforated flame at higher φ. At rich mixture the Bunsen flame becomes unstable and performs petal cellular around the cone flame front. 
Distribusi Ukuran Droplet Bahan Bakar Minyak Jelantah Sepanjang Region Semburan Nosel Seberhana I K.G. Wirawan; Ainul Ghurri; W. N. Septiadi
JURNAL MECHANICAL Vol 9, No 1 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v9.i1.201803

Abstract

Biodiesel adalah bahan bakar ramah lingkungan karena merupakan sumber energi bersih dan terbarukan. Pemakaian minyak jelantah (waste cooking oil / WCO) sebagai bahan baku biodiesel terus meningkat karena ketersediannya berlimpah, aman untuk disimpan, dan mudah ditangani. Semburan bahan bakar digunakan dalam proses pembakaran untuk tujuan mendapatkan energi dan tenaga. Viskositas rendah dan tekanan injeksi tinggi akan dihasilkan diameter droplet kecil, sudut kerucut semburan besar dan pembentukan mendekati campuran homogen selama pembakaran. Tujuan dari makalah ini adalah untuk mengetahui pengaruh tekanan injeksi dan temperatur pemanasan awal dengan terhadap karakteristik daerah semburan droplet. Minyak jelantah sebagai bahan penelitian diambil dari hotel dan restauran yang ada di Bali. Minyak ini dikumpulkan oleh Yayasan Lengis Hijau. Percobaan diawali dengan memasukkan minyak jelantah ke tabung melalui fuel intake. Udara bertekanan diinjeksikan ke dalam tabung. Katup dibuka pelan-pelan sehingga minyak jelantah mengalir melalui pipe line menuju pemanas awal berbetuk spiral pada temperatur 350oC dan tekanan 3 bar. Selanjutnya minyak jelantah mengalir menuju main body dan menyembur di ujung nosel Semburan WCO ini ditangkap menggunakan kamera. .Percobaan ini diulang dengan tekanan dan temperatur masing-masing 4, 5 bar dan 360,370,380, 390oC. Hasil dari penelitian ini adalah jarak semburan nosel semakin jauh, maka ukuran rata-rata droplet yang didapat semakin kecil. Kenaikan tekanan menyebabkan penurunan ukuran rata-rata droplet. Ukuran rata-rata droplet minimal didapat masing-masing pada temperatur 360oC dan tekanan 5 bar.                           
PEMANFAATAN KOTORAN TERNAK SEBAGAI BAHAN BAKU BIOGAS PADA SIMANTRI 543 DI KECAMATAN RENDANG I.K.G. Wirawan; I.K.G. Sugita; M. Suarda; I.K.A. Atmika
Buletin Udayana Mengabdi Vol 16 No 3 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

Rendang merupakan salah satu dari delapan kecamatan yang ada di Kabupaten Karangasem. Di kecamatan inilah terdapat kelompok peternakan sapi “Tunas Mekar Simantri 543”, atau secara spesifik terletak di Desa Pempatan. Keberadaan kelompok tani ini berfokus pada produktivitas ternak sapi, dimana pemanfaatan kotoran sapi masih belum optimal sebagai bahan baku biogas. Pengelolaan biogas perlu dikaji untuk mengetahui seberapa besar gas metan yang dihasilkan pada reaktor. Penelitian ini menggunakan 2 (dua) metode yaitu: (i) wawancara langsung dengan kelompok tani dan (ii) pengukuran kandungan gas methan pada reaktor. Hasil yang didapat menunjukkan bahwa peternak belum paham mengenai pentingnya air sebagai pencampur kotoran sapi, disamping juga dapat digunakan dalam produksi gas metan, dimana diperoleh gas sebesar sebesar 41%.
PENINGKATAN KAPASITAS PELAYANAN AIR BERSIH DI BANJAR TANGKAS KECAMATAN SUSUT KABUPATEN BANGLI I K. G. Wirawan; M. Sucipta; M. Suarda; I.D.M.K. Muku
Buletin Udayana Mengabdi Vol 15 No 1 (2016): Jurnal Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (317.052 KB)

Abstract

“Udayana Mengabdi” a community service program that was initiated by the Udayana University, where the program is implemented at Banjar Tangkas with a population of 157 households or approximately 588 peoples. Almost all the people there can enjoy clean water. The distribution using the hydraulic ram to lift water from the source of a very steep topography, so the water distribution system constraints can be overcome. Based on the orientation and discussion in the field, obtained a description that people still have difficulty in obtaining information on the hydraulic ram, particularly in terms of maintenance and repair. To overcome this problem, was conducted the technical guidance regarding maintenance and repairs to community groups. Physically, the results of this activity can be seen in the form of making a safety lid springs are made of concrete slab, the objective is for durability and protect it from the leaves of trees. In addition, other results are in the form of a storage warehouse of spare parts pumps, in order to easily maintenance and repair.
PENERAPAN POMPA HYDRAM PARAREL UNTUK MENGATASI PERMASALAHAN AIR BERSIH DI DESA KESIMPAR-KARANGASEM IGN. Putu Tenaya; IGK Sukadana; IKG. Wirawan
Buletin Udayana Mengabdi Vol 15 No 3 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

Kesimpar village located in the district Abang, regency of Karangasem. Consists of 2750 inhabitants, ofwhich 95 percent are farmers and ranchers. To meet the water needs from Andong water resources hascapacity 10 liters per second, with a walk takes 2-3 hours. From the initial survei and mapping of thesituation by the team, accompanied by community leaders, it is possible to build clean water sistems withapplication technologist hydram pump. Tim from Mechanical Engineering of Udayana University ready tohelp designing and assisting in building the sistem. The target of this service are: the establishment of waterservices, distribution evenly to every community with the appropriate discharge national standards. Resultingfrom the implementation of activities: Village Kesimpar clean water source that has the potential to be fullyutilized. It was decided to use hydram pump valve tap spherical models, the dimensions of the pump: pumpbody diameter 6 inch, 8 inch diameter of air tube, diameter/length drive pipe 6 inch/54 m. The execution ofthe planned sistem is evidenced by pumping beats period 40-44 perminute. Evaluation of the pumpingcapacity has reached capacity planning, one pump has a capacity of 0.9 - 1.0 liters/minute, and two pumpsare installed in parallel has a total capacity of 1.8 - 2.0 liters/min. Residents in the area Pura Bangun Saktisome 50 families had served with clean water.
MESIN PENCACAH SAMPAH ORGANIK SKALA RUMAH TANGGA I K. G. Wirawan; I K. G. Sugita; M. Suarda; K. Astawa
Buletin Udayana Mengabdi Vol 19 No 1 (2020): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (522.076 KB) | DOI: 10.24843/BUM.2020.v19.i01.p19

Abstract

Kecamatan Kuta Utara adalah sebuah kecamatan di Kabupaten Badung, Bali, Indonesia, yang terdiri dari 6 (enam) kelurahan, salah satunya adalah Kerobokan Kaja. Penggunaan pekarangan sebagai lahan untuk tanaman hias di Kerobokan Kaja sangat tinggi hingga mencapai 65%. Konsekuensi dari banyaknya tanaman hias ini adalah banyaknya sampah dedaunan yang dihasilkan oleh tanaman di masing-masing rumah. Sampah dedaunan ini bisa digunakan sebagai bahan dasar kompos. Dedaunan ini perlu dicacah dengan tujuan untuk memperluas bidang kontaknya, sehingga proses dekomposisi akan semakin cepat terjadi. Oleh karena itu perlu dibuatkan mesin pencacah sampah organik skala rumah tangga. Adapun selain mempercepat proses dekomposisi, mesin pencacah ini juga mereduksi volume sampah organik terutama dedaunan hingga 60%. Dengan adanya alat pencacah sampah organik ini, diharapkan dapat mengurangi volume sampah yang membebani Tempat Pemrosesan Akhir (TPA) Kata kunci : dekomposisi, mesin pencacah, reduksi volume, sampah organik, skala rumah tangga
PEMANFAATAN KOTORAN TERNAK SEBAGAI BAHAN BAKU BIOGAS PADA SIMANTRI 543 DI KECAMATAN RENDANG I K. G. Wirawan; I K.G. Sugita; M. Suarda; I K. A. Atmika
Buletin Udayana Mengabdi Vol 16 No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.417 KB)

Abstract

Rendang merupakan salah satu dari delapan kecamatan yang ada di Kabupaten Karangasem. Di kecamatan inilah terdapat kelompok peternakan sapi “Tunas Mekar Simantri 543”, atau secara spesifik terletak di Desa Pempatan. Keberadaan kelompok tani ini berfokus pada produktivitas ternak sapi, dimana pemanfaatan kotoran sapi masih belum optimal sebagai bahan baku biogas. Pengelolaan biogas perlu dikaji untuk mengetahui seberapa besar gas metan yang dihasilkan pada reaktor. Penelitian ini menggunakan 2 (dua) metode yaitu: (i) wawancara langsung dengan kelompok tani dan (ii) pengukuran kandungan gas methan pada reaktor. Hasil yang didapat menunjukkan bahwa peternak belum paham mengenai pentingnya air sebagai pencampur kotoran sapi, disamping juga dapat digunakan dalam produksi gas metan, dimana diperoleh gas sebesar sebesar 41%.
PENINGKATAN PEMERATAAN DISTRIBUSI AIR BERSIH DI DUSUN KAJA-KAUH DESA SUDAJI DENGAN PENERAPAN TANGKI PELEPAS TEKAN M. Suarda; I G.N.O. Suputra; I K.G. Wirawan; I N. Suweden; M. Sucipta
Buletin Udayana Mengabdi Vol 16 No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.361 KB)

Abstract

Banjar Kaja-Kauh desa Sudaji yang terletak diperbukitan, yang berpenduduk 231 kepala keluarga (1.155 jiwa). Warga banjar ini telah dapat menikmati sistem air bersih sejak tahun 2015 berkat bantuan rotary international. Mengingat topografi wilayah banjar Kaja-Kauh ini sangat terjal maka distribusi air dari reservoar ke perumahan penduduk tidak merata. Penduduk yang rumahnya terletak di lokasi yang rendah mendapatkan air dengan tekanan yang tinggi bahkan pipanya sampai pecah sedangkan yang berada di bagian atas kesulitan mendapatkan air. Untuk mengatasi permasalahan tersebut maka distribusi air di banjar Kaja-Kauh di bagi menjadi tiga zone, yaitu zone-Atas, zone-Tengah, dan zone-Bawah. Di zone bawah (beda elevasi lebih tinggi dari 80 meter) dipasang satu tangki pelepas tekan sehingga pipa distribusi pada daerah tersebut tidak pecah. Tangki pelepas tekan tersebut telah memberi manfaat yaitu dapat mengurangi tekanan air berlebih/tinggi di zona bawah yang dapat memecahkan pipa dan merusak kran sambungan rumah. Disamping itu sistem tangki pelepas tekan tersebut dapat membuat distribusi aliran air lebih merata terutama aliran air untuk zona atas dan tengah menjadi lebih baik dan lancar.
Analisa Performansi Sistem Air Conditioning Mobil tipe ET 450 dengan Variasi Tekanan Kerja Kompresor Adi Purnawan; Suarnadwipa -; I K.G. Wirawan
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Comfort and coolness when traveling by vehicle especially car is highly needed. So many attempts have been made byhumans that comfortable traveling by car can be achieved. One of the effective ways in which comfortable traveling by car can beobtained is by installing air conditioning. The performance of air conditioning system is highly influenced by how the compressorworks. In other words, the pressure resulting from the suction highly determines the performance of air conditioning system,which then affects how the compressor works, the compressor power, the refrigeration effect, the efficiency of isentropic andcoefficient of performance (COP) of the car air conditioning sytem especially that of the car air conditioner type ET 450. Fromwhat has been described above, the writer would like to conduct a research entiled “ Analysis of the Performance of the Car AirConditioning system Type ET 450 with Variation of the Compressor Pressure”.The test was conducted on the car air conditioner type ET 450 with variations of suction 2.8 bar, 3 bar, 3.2 bar, 3.4bar, 3.6 bar and 3.8 bar. The data were obtained from the pressure of compressor output (P2), the temperatures in each point areT1, T2, T3, T4, the compressor rotationn is n, the strength of electrical current is I, and the volumetric flow rate. The data werethen processed and analyzed so that so that the performance of each variation of the suction could be actually and theoreticallyobtained.The findings show that the bigger the suction, the bigger the performance of the car air conditioner type ET 450 wouldbe. The theoretical coefficient of performance (COP) produced was bigger than the actual COP. The optimal COP took placewhen the suction was 441.325 kPa, the actual COP was 3.513177 and the theoretical COP was 3.632062
Co-Authors Adi Purnawan Ainul Ghurri Ari Dwi Agus Sulistyo Hanung Adi Nugroho I Dewa Gede Ary Subagia I G.N.O. Suputra I Gusti Ketut Sukadana I Gusti Komang Dwijana I Gusti Ngurah Putu Tenaya I K. A. Atmika I Ketut Adi Sugita I Made Astika I Made Panji Tirta Prakasa I Made Suinata I Nengah Suarnadwipa I Nengah Suweden I Nyoman Suprapta Winaya I Wayan Arya Darma I.D.M.K. Muku I.G.K. Sukadana I.K.A. Atmika I.M. Astika I.N.G. Wardana I.N.G. Wardana K. Astawa M. Sucipta Made Suarda Ngurah Putra Wibawa Rudy Soenoko Rudy Soenoko Slamet Wahyudi Tri Siswanto Kamid Wayan Nata Septiadi