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All Journal IPTEKMA Buletin Udayana Mengabdi Jurnal Energi Dan Manufaktur Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Logic : Jurnal Rancang Bangun dan Teknologi International Journal of Engineering and Emerging Technology J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Natural Sciences Engineering and Technology Journal Sibatik Journal : Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Logic : Jurnal Rancang Bangun Dan Teknologi Mutiara: Jurnal Penelitian dan Karya Ilmiah
Made Sucipta
Program Studi Teknik Mesin, Fakultas Teknik, Universitas Udayana
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Water-Cooled Chiller Terintegrasi Heat Recovery System pada Industri Perhotelan di Bali Made Sucipta; Ida Bagus Oka Jeve; Ketut Astawa
Jurnal Energi Dan Manufaktur Vol 13 No 2 (2020)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEM.2020.v13.i02.p03

Abstract

Performance testing of water-cooled chiller integrated with a heat recovery system has been carried out at a hotel in Bali. After commissioning, testing is carried out for 2 days to determine the readiness of the components in operation. The coefficient of performance which is the reference in this study is used to determine the performance of the system with a capacity of 275 tons of refrigeration which is divided into the coefficient of performance of the refrigeration system and the coefficient of performance of the total integrated system. Data was collected with 8 hour intervals starting at 06.00, 14.00, and 22.00 Wita every day. This condition is based on the prediction of the cycle of changes in energy use in the hotel, which includes breakfast, hotel check-in and bedtime. From the research results, it was found that with the condition and situation of the hotel were not measured properly and the occupancy rate of the hotel which was not yet maximal resulted in a greater refrigeration capacity on the second day, but this was also followed by a large demand for compressor power. Although in the end the coefficient of performance was slightly larger than day 1. It was also found that the greatest need for heat transfer rate is required at 22.00 Wita during the 2-day test. This is possibly due to the need for hot water for hotel guests to shower at night. In general, an increase in the coefficient of performance is still possible if there is an increase in hotel occupancy rates.
Kajian eksperimental head losses katup limbah pompa hydram Made Suarda; Ainul Ghurri; Made Sucipta; I Nengah Suweden
Jurnal Energi Dan Manufaktur Vol 10 No 2 (2017): Oktober 2017
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak Disain katup limbah yang baik dan penyetelan panjang langkah (stroke) yang tepat merupakan faktor penting untuk operasi pompa hydram yang halus dan efisien. Katup limbah harus mampu menutup dengan cepat untuk menghasilkan tekanan tinggi pada saat terjadi water hammer. Disain detail katup limbah meliputi luas lubang katup limbah, luas penampang piringan katup, dan panjang langkah katup. Penelitian sebelumnya menyarankan bahwa diameter lubang katup limbah harus sama atau lebih besar dengan diameter pipa penggerak untuk menghindari terhambatnya aliran air keluar katup limbah. Namun diameter optimal katup limbah belum diketahui. Katup limbah tertutup akibat gaya drag yang terjadi karena aliran air melewati katup tersebut. Jadi geometri katup limbah adalah sedemikian rupa sehingga gaya seret tersebut meningkat dengan cepat sesuai arah pergerakan katup tersebut menuju posisi tertutupnya. Friction drag mengakibatkan kehilangan energi atau head losses aliran air melewati katup limbah yang merupakan besarnya perubahan energi aliran sebelum dan sesudah katup limbah tersebut. Head losses tersebut dapat diinvestigasi dengan mengukur tekanan di bawah katup limbah dan debit aliran yang mengalir melewati katup limbah tersebut pada posisi kesetimbangannya. Hasil penelitian menunjukkan bahwa rasio diameter lubang katup limbah terhadap diameter pipa penggerak yang mengakibatkan head losses terendah adalah sekitar 130 persen atau pada rasio luas penampangnya sekitar 172 persen. Kata kunci: Pompa hydram, katup limbah, head losses, rasio diameter Abstract Suitable design and appropriate stroke adjustment of a waste valve are important factors for smooth and efficient hydram pump operation. The waste valve must be able to close quickly to produce high pressure during a water hammer take placed. In addition, detailed design of the waste valve comprises of the hole-diameter of the valve, the cross-sectional area of valve disc, and the valve step stroke. Prior researches suggest that the hole-diameter of the waste valve should be equal to or greater than the diameter of the drive pipe to avoid obstruction of the outflow passes throught the waste valve. However, the optimal diameter of the waste valve is unidentified yet. The waste valve is closed due to the drag force that take places as the water flow passes through the valve. Therefore, the geometry of the waste valve is such that the drag force increases rapidly as the direction of the valve moves to its closed position. Friction drag results in loss of energy or head losses of water flow through the waste valve which is the magnitude of the change of energy flow before and after the waste valve. Head losses can be investigated by measuring the pressure under the waste valve and the flow discharge flowing through the waste valve at its equilibrium position. The results showed that the ratio of the diameter of the waste valve to the diameter of the diameter of the drive pipe which is resulting in the lowest head losses was about 130 percent or at the cross-sectional area ratio was about 172 percent. Keywords: Hydraulic ram, waste valve, head lsses, diameter ratio
Pengaruh Temperatur Operasi Dan Kecepatan Superfisial Terhadap Komposisi Gas Produser Pada Gasifikasi Fluidized Bed Berbahan Bakar Sampah Terapung I Nyoman Suprapta Winaya; Made Sucipta; I Dewa Made Susila
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Management of waste into energy that is economically possible with fluidized bed gasification technology. Gasification is athermo-chemical process that converts biomass/solid waste into producer gas (CO, H2, CO2 and HC) by using air, steam, oxygenor its mixtures as a gasification agent. In a study of floating waste fuel gasification in pellet form with 1,25 cm diameter and 1.25cm height and of 1.22 gram mass, where is used oxygen enriched air as gasification agent. The operating temperature (Top) atreactor selected 500oC and 600oC with superficial velocities (Uo) are 0.105 m/sec, 0.125 m/sec, 0,145 m/sec., and 0,165 m/sec.From the research results showed that by increasing the operating temperature of 500oC to 600oC and increasing the superficialvelocity of 0.105 m/sec to 0.125 m/sec, did not influence directly the increasing of percentage/levels of CO, CO2 and HC gas thatproduced.
Analisa Performansi Sistem Pendingin Ruangan dan Efisiensi Energi Listrik padaSistem Water Chiller dengan Penerapan Metode Cooled Energy Storage Komang Metty Trisna Negara; Hendra Wijaksana; Nengah Suarnadwipa; Made Sucipta
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Untuk menghemat penggunaan energi listrik sebagai akibat penggunaan AC (air conditioning) yang semakin meningkatmaka telah dilakukan modifikasi pada sistem AC tersebut dengan mengganti fungsi evaporator menjadi box Cooled EnergiStorage (CES). Pada modifikasi ini fungsi AC digabungkan dengan AHU dengan memanfaatkan fungsi evaporator sebagaisumber pendinginannya, dimana evaporator dimasukkan kedalam box yang telah diisi air dengan volume 0,072 m3. Denganmenggunakan pompa, air dingin tersebut dialirkan ke AHU, selanjutnya dimanfaatkan sebagai pendingin ruangan.Pengujian dilakukan dengan membandingkan dua cara pengoperasian. Pertama, sistem AC dan AHU dioperasikan secarabersamaan, sedangkan cara kedua sistem AC dioperasikan untuk mendinginkan air di box CES sampai mencapai temperaturyang hampir sama seperti pada saat cara pertama. Selanjutnya sistem AC dimatikan dan AHU dioperasikan untukmendinginkan ruangan. Hasil yang diperoleh pada cara pertama adalah temperatur air di box CES mencapai sekitar 0,9oCdalam waktu pengujian selama 1 jam (interval pencatatan data setiap 10 menit) sedangkan temperatur ruangan mencapai12,9 oC dan penggunaan daya listriknya mencapai 0,8650 kWh. Pada cara kedua, temperatur air di box CES mencapaisekitar 0,5 oC pada selang waktu pengujian selama 30 menit. Setelah AC dimatikan dan AHU dioperasikan, ruangan hanyamampu didinginkan mencapai temperatur 17,8 oC dalam waktu 30 menit. Tetapi temperatur air di box CES mencapai 16,5 oCpada 10 menit pertama dan terjadi peningkatan yang sangat kecil pada menit-menit berikutnya. Penggunaan daya listrikdengan cara yang kedua ini menunjukkan terjadinya penghematan sebesar 0,4201 kW dibandingkan dengan cara pertama.
Memanfaatkan Air Bilasan Bagas Untuk Menghasilkan Listrik Dengan Teknologi Microbial Fuel Cells I Nyoman Suprapta Winaya; Made Sucipta; A.A. Krisna Wira Putra
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

A microbial fuel cell design of fuel cells (MFC) by using the H type membrane (PEM) of the salt bridgeused in this study for the purpose of generating direct current electricity by making use of the rinse water Bagas.Bagas rinse water used to enrich microbes oxidizing the electron donor in the anode. Oxygen is pumped (forcedaeration) at the cathode. Within 7 to 9 days would be generated a steady flow system 240 mV. The use of moreelectrodes to extend electrode surface that is from 3, 6, and 9. And the use of two PEM has a thickness of 10 cmwith a different contact surface of each dianoda and cathode at 2 inches and 4 inches. So after testing is doneobtained data showing that the water blasan bagasse can be used to generate electricity with MFC technologyas well as with a combination of factors will also result in improved performance of the MFC.
Influence of Fixed Temperature of Chilled Water Outlet Setting toward Performance of Chiller Absorbtion with Two Level Heating Cycle Method I Gusti Agung Bagus Wirajati; Made Sucipta
Jurnal Energi Dan Manufaktur Vol 3, No.1 April 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The study investigated the performance of re-heat two stage cycle. This paper presents the working principle and theexperimental results of the reheat two stage adsorption cycle. The performance of the cycle was evaluated under differentheat source temperature and mass recovery time. Coefficient of performance (COP) and cooling capacity have beencalculated to analyze the influences of experimental conditions. The experimental results shown in both COP and coolingcapacity increased along with heat source temperature increased, and mass recovery time is very effective to improve theperformance without increasing heat source temperature.
Analisa Performansi Destilasi Air Laut Tenaga Surya Menggunakan Penyerap Radiasi Surya Tipe Bergelombang Berbahan Dasar Beton Ketut Astawa; Made Sucipta; I Putu Gede Artha Negara
Jurnal Energi Dan Manufaktur Vol 5, No.1 April 2011
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

In principle, the distillation is a way to get clean water through desalination process dirty. In the refining processthere is a process of heat transfer, evaporation, and condensation. Heat transfer occurs from the heat source to the dirtywater. If water continues - it will happen again heated evaporation process. This steam on contact with cold surfaces it willbe a process of condensation on cold surfaces. In the distillation process condensate water is captured, germs and bacteriawill die by the heating process, and dirt will settle to the bottom basin One can use the sun's energy.In the system of solar distillation of sea water, absorber plate very important role because it serves as an absorberof solar radiation and convert light into heat energy that will heat the sea water above it. Based on the initial hypothesis ofthe authors that the type of flat-plate absorber is less than optimal, I will attempt to create a design and compare theperformance of sea water distillation appliance that uses a flat type absorber, absorber types of wavy, and wavy-coatedabsorbent type gravel. On the premise that type absorber has a broad corrugated heat absorption field is greater than theflat type absorber.Tests conducted from 09:00 am until 17:00 pm. The volume of sea water in the test as much as 30 liters. Testresults show the type of radiation absorber coated corrugated gravel produces more condensate is equal to 1295 grams withan average efficiency reaches 12.33%, and the type of radiation absorbent corrugated produce condensate for 1250 gramswith an average efficiency reaches 12.84% . While the radiation absorber can only produce a flat type of 795 ml with anaverage efficiency reaches 8.48%.
Analisa Pembangkit Listrik Tenaga Diesel Gas Dengan Menggunakan Bahan Bakar LNG Dan Minyak Solar Di PT Indonesia Power Unit Pembangkitan Bali K G Trisna Upadana Putra; I Gusti Bagus Wijaya Kusuma; Made Sucipta
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 4 No 1 (2018)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/METTEK.2018.v04.i01.p05

Abstract

Permintaan energi listrik mengalami peningkatan, seiring peningkatan pertumbuhan populasi penduduk dan banyaknya industri. Tingginya permintaan energi listrik menjadi sebuah tantangan untuk produsen listrik, dalam memenuhi kebutuhan pelanggan akan energi listrik. Produsen listrik terbesar di Bali adalah PT. Indonesia Power UP Bali. Pembangkit yang dimiliki yaitu PLTDG dengan kapasitas produksi listrik 200 MW dioperasikan menggunakan bahan bakar gas LNG dan minyak solar (HSD/LFO). Dikarenakan penggunaan minyak solar dibatasi, maka PLTDG dioperasikan dengan gas LNG. Perbedaan bahan bakar yang digunakan mempengaruhi unjuk kerja dari pembangkit. Analisa unjuk kerja memberi gambaran dalam sisi keteknikan dan analisa BPP pembangkitan memberi gambaran dalam sisi keekonomian. Penelitaian ini dilakukan dengan cara perhitungan menggunakan persamaan-persamaan unjuk kerja mesin diesel, kemudian dibandingkan unjuk kerja PLTDG menggunakan bahan bakar LNG dan minyak solar dan dianalisa secara keekonomian. Hasil yang didapat yaitu unjuk kerja PLTDG menggunakan minyak solar lebih besar tetapi dari sisi keekonomian hasil BPP PLTDG menggunakan gas LNG lebih ekonomis. Demand for electric energy has increased, as population growth increases and the number of industries. The high demand for electrical energy becomes a challenge for electricity producers, in meeting the needs of customers for electrical energy. The largest power producer in Bali is PT. Indonesia Power UP Bali. The power plant owned by PLTDG with 200 MW electricity production capacity is operated using LNG gas and diesel fuel (HSD/LFO). Due to the use of diesel fuel is limited, the PLTDG is operated with LNG gas. The difference in fuel used affects the performance of the plant. Performance analysis gives an overview in terms of engineering and BPP analysis provides an overview of the economy side. This research is done by calculation using diesel engine performance equation, and then compared the performance of PLTDG using LNG and diesel fuel and analyzed economically. The results obtained are the performance of diesel powered PLTDG larger but in terms of economics of BPP PLTDG results using LNG gas is more economical.
Perancangan Gasifikasi Downdraft dengan Variasi Laju Aliran Oksigen sebagai Agen Gasifikasi Gusti Ngurah Agung Satria Prasetya D.Y; Made Sucipta; I Nyoman Suprapta Winaya
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 1 No 2 (2015)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

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Abstract

Abstract Biomass energy is energy derived from biological material from plants such as wood, rice husk, corn head, and other The process of conversion of biomass into energy can be process by combustion, pyrolysis, and gasification. The gasification process is a process of utilization of biomass by converting energy from a solid raw material (biomass) into syn-gas (the synthesis gas) that can later be used as fuel. One example of gasification that has been developed is a downdraft system. Gasification process has several factors that affect the process and content of syngas dihasillkannyaie, characteristics of biomass gasifier designs, types of agents gasifikasinya, and the air-fuel ratio. In this study the gasification reactor is designed to use black steel pipe diameter of 6 "with a height of 1 meter reactor. Agent oxygen gasification syngas selected to obtain better results, the oxygen flow rate by 2, 4, and 6 liters per minute, and the use of wood as fuel shaved. The results were obtained variation of the oxygen flow rate of 4 lpm produce useful energy and efficiency are the highest, followed at 6 lpm oxygen flow rate, and the lowest last on oksegen flow rate of 2 lpm. This is in addition influenced by the percentage of syngas CO, CH4 and H2, is also influenced by the length of the gas utilization that occurred in each valiari oxygen flow rate. By which time the utilization of this gas will affect the actual value SA which determines the number of moles of syngas CO, CH4 and H2.
Kekerasan Baja Karbon Sedang dengan Variasi Suhu Permukaan Material Dwi Payana; I Made Widiyarta; Made Sucipta
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 4 No 2 (2018)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/METTEK.2018.v04.i02.p02

Abstract

Beban gesek pada permukaan sebuah benda dapat menimbulkan panas pada permukaan kontak benda tersebut. Semakin besar beban gesek yang terjadi, suhu pada permukaan material akan menjadi lebih tinggi. Peningkatan suhu permukaan yang semakin tinggi dapat mempengaruhi sifat mekanis permukaan material dan tentunya dapat berimplikasi terhadap mekanisme kegagalan pada permukaan material tersebut, seperti kegagalan aus dan kegagalan retak. Pada penelitian ini, uji kekerasan dilakukan pada material dengan suhu permukaan tertentu. Permukaan material baja karbon sedang dipanaskan dengan variasi suhu yaitu mulai dari suhu kamar sampai dengan 300ºC, kemudian dilakukan uji Vicker’s. Tingkat kekerasan dan profil indentasi Vickers pada permukaan material dengan variasi suhu tersebut kemudian diinvestigasi. Friction load on the surface of an object can cause heat on the contact surface of the object. The larger the frictional load occurs, the temperature on the surface of the material will become higher. Increased surface temperatures can further affect the mechanical properties of the material surface and can certainly have implications for the failure mechanisms on the surface of the material, such as wear failure and crack failure. In this study, hardness tests were performed on materials with certain surface temperature. The surface of the carbon steel material is being heated with temperature variations ranging from room temperature up to 300ºC, then Vicker's test. The degree of hardness and Vickers indent profile on the surface of the material with the temperature variation is then investigated.
Co-Authors A.A. Kade Argha Dharmawan A.A. Krisna Wira Putra Ainul Ghurri Anak Agung Istri Agung Sri Komaladewi Aqsal Raja Bramastha Cindy Dwi Meylinda Dewa Ngakan Ketut Putra Negara Dwi Payana Epenetus Rapael Gusti Ngurah Agung Satria Prasetya D.Y Hendra Wijaksana Hendra Wijaksana I Dewa Gede Agung Astina Wirayudha I Dewa Gede Agung Astina Wirayudha I Dewa Gede Andreano Eldo I Dewa Gede Andreano Eldo I Dewa Made Susila I G.N.A. Satria Prasetya D. Y. I Gede Arya Dimas Wisnu Murti Surawardana I Gede Hendra Gunawan I Gede Krisna Pratama I Gusti Agung Bagus Wirajati I Gusti Agung Gede Kusuma Artha I Gusti Bagus Wijaya Kusuma I Gusti Ketut Sukadana I Gusti Komang Dwijana I Kadek Dhananjaya Dana Putra I Kadek Dhananjaya Dana Putra I Kadek Heri Suardan I Kadek Heri Suardan I Ketut Adi Atmika I Ketut Adi Sugita I Ketut Gede Wirawan I Made Agus Putrawan I Made Dhanu Wijaya I Made Dwijaksana I Made Dwijaksana I Made Suardamana I Made Widiyarta I Nengah Suarnadwipa I Nengah Suweden I Nyoman Gede Sujana I Nyoman Mahatma Yogeshvara I Nyoman Mahatma Yogeshvara I Nyoman Mariawan I Nyoman Suprapta Winaya I Putu Angga Yuda Pratama I Putu Gde Raditya Wikadhyana I Putu Gede Artha Negara I Putu Gede Krisna Mahendra Putra I Putu Gede Raditya Wikadhyana I Putu Prasna Mahardika I Putu Prasna Mahardika I Putu Widiarta I Putu Yajnartha I Wayan Surata I Wayan Temaja Ibnu Gusti Muttaqin Ida Bagus Oka Jeve K G Trisna Upadana Putra Ketut Astawa Komang Gede Darmayasa Komang Gede Darmayasa Komang Metty Trisna Negara Luh Putu Ike Midiani Made Agus Putra Harta Narayana Made Agus Putra Harta Narayana Made Naradha Adithya Made Naradha Adithya Made Putra Sedana Made Putra Sedana Made Rasmika Werdhi Nugraha Made Rasmika Werdhi Nugraha Made Suarda Nengah Taksu Yusaramana Nengah Taksu Yusaramana Ni Made Dwidiani Putu Pande Devaryana Putra Putu Pande Devaryana Putra Sitompul, Ignasius Deo Sudirman - Tjokorda Gde Tirta Nindhia Wayan Nata Septiadi