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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin Jurnal Abdi Insani DWIJENAGRO: JURNAL ILMIAH Jurnal Karya Pengabdian Teknik Mesin Energy, Materials and Product design JPFT (Jurnal Pendidikan Fisika Tadulako Online)
Made Wijana, Made
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DESAIN TUNGKU BRIKET BIOMASSA SYSTEM KONTINYU SEBAGAI TEKNOLOGI PEMANFAATAN ENERGI ALTERNATIF PENGGANTI BAHAN BAKAR TERPAKAI PADA OVEN TEMBAKAU DI MASYARAKAT PEDESAAN Wijana, Made; Nurchayati, Nurchayati
Dinamika Teknik Mesin Vol 3, No 1 (2013): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Semakin menipisnya cadangan minyak dunia yang menyebabkan harga bahan bakar minyak (BBM) terus melambung. Tungku spiral berbahan bakar minyak tanah, merupakan komponen utama pada oven (omprongan) tembakau yang ada di NTB, yang mana potensi tembakau Virginia sebanyak 45.534 ton dan memerlukan minyak tanah 45 juta liter. Tembakau yang banyak tersebut  terancam tidak dapat dikeringkan akibat mahal dan langkanya minyak tanah sebagai bahan bakar utama. Sementara energy alternative pengganti berupa bongkahan batu bara dan kayu bakar tidak memberikan solusi yang baik.  Untuk  itu dalam penelitian ini didesain tungku yang kemudahan pengoperasiannya menyerupai kombinasi tungku minyak tanah dan tungku bongkahan batu bara dengan memanfaatkan kelebihan dan memperbaiki kelemahan-kelemahannya.  Dengan tungku yang mudah dioperasikan sebagai alat pemanfaat energi alternative dan terbarukan, maka masyarakat akan tertarik untuk menggunakannya, ini akan berdampak pada menurunnya biaya pengovenan tembakau. Metode yang digunakan dalam penelitian ini adalah eksperimen langsung, untuk mengetahui kinerja tungku spiral dilakukan beberapa pengujian. Untuk mendapatkan kesepadanan kemampuan pemanasan antara tungku spiral berbahan bakar minyak tanah dengan tungku desain baru berbahan bakar briket, dilakukan pengujian nilai kalor dan perhitungan jumlah alur briket yang diperlukan, selanjutnya dilakukan pengujian boilling time pada masing-masing tungku.  Dan untuk mengetahui peningkatan waktu operasional tungku baru dibanding bahan bakar alternatif lain, dapat dilakukan pengujian lama nyala dalam satu kali pengisian tungku briket.  Serangkain pengujian ini dilakukan untuk mengetahui apakah  tungku desain baru ini layak  digunakan pada omprongan tembakau.Dari hasil pengujian nilai kalor diperoleh bahwa nilai kalor tertinggi adalah minyak tanah dengan nilai kalor, 9.828,2816 Kkal/kl, dan yang terendah adalah briket biomassa dengan nilai kalor 4.996,5028 Kkal/kg. Pada tungku spiral diperoleh kecedrungan bahwa semakin besar stelan, maka n boilling time semakin kecil (cepat) dan kebutuhan bahan bakar yang semakin besar. Waktu yang dibutuhkan untuk mendidihkan 1 liter air ( boiling time) yang paling kecil (cepat) adalah pada stelan ke 4 yaitu 178,67 detik, pada posisi ini, kebutuhan bahan bakarnya terbesar yaitu  103,33 ml. dari pengujian  tungku briket desain baru yang menggunakan dua bahan bakar alternative,  boilling time kedua bahan bakar alternative (briket) tersebut masih lebih besar dibandingkan dengan tungku spiral stelan ke 4. yaitu  masing-masing 390.67 detik untuk briket biomassa dan 255.33 detik untuk briket batubara. Sedangkan dilihat dari boiling time tungku spiral stelan ke 2 yang memiliki nilai 437.33, maka kedua bahan bakar alternative yang menggunakan tungku desain baru, memiliki boiling time yang lebih kecil (cepat) dan dari pengujian lama operasional tungku berbahan bakar briket biomassa, dibandingkan dengan bongkahan batubara dan kayu bakar, diperoleh peningkatan lama operasional sebanyak tiga kali lipat. Bongkahan batubara dan kayu bakar, dalam satu kali pengisian dapat beroperasi selama maksimal 2 jam, sedangkan tungku desain baru berbahan bakar biomassa, dapat beroperasi 6 jam dalam satu kali pengisian. Sedangkan Mekanisme kerja penekan briket, alur briket dan penahan ruang pembakaran dapat berjalan sesuai fungsinya sehingga, kontinyuitas tungku dalam 1 kali pengisian dapat berjalan dan beroperasi dengan stabil selama 6 jam.  Dari kinerja tersebut, maka tungku desain baru layak menggantikan tungku spiral pada omprongan tembakau .
APLIKASI BREAK EVEN POINT PADA SISTEM OPERASIONAL KAPAL MOTOR PENYEBERANGAN RODITHA PT. ASDP INDONESIA FERRY (PERSERO) CABANG LEMBAR Wijana, Made; Triadi, A.A. ALit; Febriandi, Firza
Dinamika Teknik Mesin Vol 4, No 2 (2014): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v4i2.57

Abstract

This study is intended to analyze the feasibility operation KMP Roditha which owned by PT. ASDP Indonesia Ferry (Limited). Location of research in the trajectory Sheet - Padang Bai, was used the Break Even Point. Collecting a range of cost of KMP Rodita, therefore was known the operating costs, maintenance costs and income from the sale of tickets while one year. Stepsare used in this research is the analysis of quantitative data, where i would collect the data required in relation to the matter to be investigated, so that research results can be more reliable and credible. The results of this study indicate that KMP Roditha income in 2010 was Rp. 12,007,178,916, of a total of 504 trips. Break Even Point in 2010 occurred in the 5th month on 213 trips, so that KMP Roditha feasible to operate.
Aplikasi Rekayasa Nilai (Value Engineering) Pada Desain Tungku Briket Arang Biomassa Sistem Kontinyu Berpengapian Semi Otomatis Sebagai Upaya Mempermudah Pemanfaatan Energi Alternatif Mengganti Minyak Tanah Wijana, Made; Joniarta, I Wayan
Dinamika Teknik Mesin Vol 2, No 2 (2012): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

The biomassa charcoal briquet is one of principal component of cooking in household scale which has some weakness in its operation, such as take a long time for beginning ignitation, flame energy is not stable, the putting out can not be done quickly, once filling up for once cooking. Impractical operational of briquet stove  caused people did not want to change the use of petroleum stove to the use  of biomass briquet stove. Hence, biomass charcoal briquet stove is modified in order to simplify its operation by increase fungsional aspect, technique aspect, and economical aspect.            The method used in this research is value engineering method in order to choose one alternative of modification of biomass charcoal briquet  stove and analyze with five phase of job planning that include (1) information phase, (2) creative phase, (3) analysis phase, (4) development phase, and (5) presentation phase.            At the analysis phase, it is made analysis to eight alternatives of modification and one initial design which is used as reference of performance evaluation. The evaluation result at development phase is the seventh alternative of modification has the highest value that is 1,358 with performance 425,10 and gives some advantages, those are cooking speed is increased (boilling water in seven minute per liter), operational simplicity is very increased that is once filling up for cooking repeatedly (continue system), cutting out of fire can be done quickly without taking apart of stove (semi automatic), pollution is decreased and stinging smell is not happen.            Biomass charcoal briquet stove has high economic value, because its operasional is almost the same as petroleum stove and its operational cost is a quarter of petroleum stove cost.  So, it is good to be developed and applied to society. 
APLIKASI METODE BREAK EVEN POINT PADA DESAIN TUNGKU GASIFIKASI BIOMASSA MULTI BURNER SEKAM PADI SEBAGAI PENGGANTI MINYAK TANAH DAN KAYU BAKAR MENUJU MASYARAKAT MANDIRI ENERGI DI DAERAH PULAU KECIL Wijana, Made; Joniarta, I Wayan; Nurchayati, Nurchayati
Dinamika Teknik Mesin Vol 4, No 1 (2014): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

 Dimasyarakat pulau kecil sering mengalami kesulitan dalam memasak karena langka dan mahalnya minyak tanah dan kayu bakar. Sedangkan tungku gasifikasi yang telah diteliti dan diapikasikan (gasifikasi biomassa single burner) , meskipun hasilnya sudah bagus , tetapi sulit diterima dimasyarakat karena pemasakan dilakukan langsung diatas tungku, sehingga keamanannya lemah karena bahaya terkena panas dinding tungku dan rancangan yang tinggi mengakibatkan kekhawatiran masyarakat, disamping itu sifatnya tidak bisa kontinyu dan pengapiannya tidak bisa dilakukan secara cepat, karena tungku dengan burner dirancang menjadi satu. Untuk itu maka pada program ini perlu dilakukan penelitian bagaimana merancang suatu tungku gasifikasi biomassa yang murah, mudah dan aman dalam pengoperasiannya dengan merancang bentuk tungku yang memiliki  multi burner dengan letak tungku dan burnernya terpisah, bagaimana merancang saluran penghantar dari tungku ke burner,dan bentuk burner yang sesuai sehingga dengan jauhnya tungku dan burner pengapian, keamanan dan kenyamanan masyarakat pulau kecil pengguna energi terbarukan (gasifikasi biomassa) terjamin, sehingga masyarakat mandiri energy di pulau kecil dapat diwujudkan..         Metode yang digunakan dalam penelitian ini adalah metode rekayasa nilai  untuk memilih satu alternatif  modifikasi pada tungku briket arang biomassa dan menganalisanya melalui lima tahap rencana kerja yang meliputi (1) tahap informasi, (2) tahap kreatif, (3) tahap analisa, (4) tahap pengembangan dan (5) tahap presentasi.          Pada tahap analisa, dilakukan analisa terhadap 8 alternatif modifikasi ditambah 1 desain awal, dimana desain awal digunakan sebagai patokan dalam penilaian performansi. Hasil penentuan nilai pada tahap pengembangan diperoleh bahwa alternatif modifikasi ke-7, mempunyai nilai tertinggi yaitu1,142   dengan performansi 427,83, dan biaya Rp. 1.850.000,0. Alternatif ini memberikan keuntungan antara lain, kemudahan operasionalnya sangat meningkat dapat dilakukan pengisian berulang tanpa mengganggu nyala api (sistem kontinyu), dan pemadaman api dapat dilakukan dengan cepat tanpa  pembongkaran tungku (semi otomatis),  pengguna tidak perlu memasak diatas reaktor gasifikasi yang panas dan tinggi, karena tungku ini didesain dapat memasak diatas burner yang jauh dari reaktor gasifikai, kecepatan pemasakan meningkat (mendidihkan 2 lt air dengan waktu 7 menit), pencemaran menurun dan tidak terjadi bau menyengat.          Tungku gasifikasi multiburner mempunyai nilai  ekonomi tinggi karena  kinerjanya hampir sama dengan tungku minyak tanah dan biaya operasionalnya sekitar 1/3 dari tungku minyak tanah, untuk memasak 2 lt air, menggunakan minyak tanah sekitar 1/10 lt (Rp. 1300), dengan tungku single burner membutuhkan sekam 2 kg (Rp. 400) dan dengan tungku ini membutuhkan 2 kg sekam (Rp.400), dengan melihat hal tersebut, maka tungku gasifikasi multibuerner, dari segi ekonomi sangat prospek untuk dikembangkan di masyarakat. Sebagai salah satu alternative pengganti tungku gasifikasi single burner, tungku minyak tanah dan kayu bakar dan sebagai salah satu agen dari green technology guna menciptakan masyarakat mandiri energi khususnya di pulau-pulau kecil
ANALISA KELAYAKAN BEJANA BERTEKANAN TIPE VERTIKAL DENGAN MENGGUNAKAN SIMULASI AUTODESK INVENTOR Yudhyadi, I G.N.K.; Rachmanto, Tri; Suartika, I Made; Wijana, Made; Fahrurrozi
Energy, Materials and Product Design Vol. 1 No. 1 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

The minimum thickness of vertical type pressure vessel of column type distillation, must be planned in accordance with the recommended code of ASME (The American Society of Mechanical Engineering) VIII Div 1. Based on this code, the study aims to determine the feasibility of a pressure vessel that used by PT Pertamina (Persero). For this reason, and to be able to use this ASME code, various data was needed, especially the data sheets and some required data from the field. Based on the data that has been collected, it is then processed and was made a 3D modeling and was simulated using Autodesk Inventor software to test its feasibility. Based on the results of the study, the minimum thickness was obtained, namely head 13.66 mm, shell 13.69 mm, and skirt 3.47 mm, respectively. Taking into account the availability of materials on the market, namely SA-516 Grade 70, the recommended thickness of the head and shell sections was 14 and 5 mm, respectively. From the results of the safety analysis, it was found that at the stress of 0.217, 0.197, 0.196, and 0.195 MPa, the Von Mises stress that occurred ware 0.249; 0.226, 0.225 and 0.224 MPa. From these data, based on the distortion energy failure theory, the head and shell materials which have yield strength of 260 MPa can be categorized as very safe because it does not exceed the yield strength of the material used.
EVALUATION OF WASTE FACILITY NEEDS BASED ON THE EXISTING POSITION AND THE AMOUNT OF WASTE VOLUME IN JEMPONG BARU-MATARAM VILLAGE Wijana, Made; Suartika, I Made; Joniarta, I Wayan
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

An increase in the volume of waste if it is not accompanied by good management, will certainly have a bad impact on reducing the quality of the environment. In Jempong Baru village which has a population of 17,172 people, but currently only has 1 TPS located in the east Jempong neighborhood which has an area of 36 m3 with a capacity of 72 m3 and 1 damtruck with a capacity of 7 m3, which should be insufficient facilities, but in fact there is no garbage overflowing out of the TPS. For this reason, it is necessary to further study the current real condition (existing position) compared to the condition if all villages dispose of waste at the TPS in the environment of the research site (alternative position), in terms of the size of the volume of waste and the number of minimal waste facilities needed. The result of this study is that a dumptruck with a capacity of 7 m3 is able to transport waste from the TPS to the landfill, which is as much as 3 times / day (3 irritations). The total amount of waste generated in Jempong Baru Village in the existing position is 28.97 m3 / day and in the alternative position of 121.47 m3 / day. In the existing position, 1 TPS with a capacity of 72 m3 and 1 dumptruck with a capacity of 21m3 / day are sufficient. Meanwhile, in the alternative position, the facilities needed to handle the volume of waste as much as 121.47 m3 / day are at least 1 TPS and 6 dumptrucks
ANALISIS PENERAPAN KONSEP ERGONOMI UNTUK MENDESAIN MESIN POTONG KULIT KERANG MUTIARA Joniarta, I Wayan; Wijana, Made; Chatur Adi W.A., I G.A.K.; Bawa Susana , I Gede; Suartika , I Made
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

The application of the concept of ergonomics is carried out on seashell craft work facilities because the work facilities used are not in accordance with the principles and norms of ergonomics feasibility. The research objective is the redesign of cutting machines and work chairs based on various kinds of information related to human factors which include designing tools and work facilities that are more effective, safe, comfortable, healthy, and efficient (ENASE). Some of the ergonomic parameters that are used as references include aspects of anthropometry, human physical performance, effectiveness-efficiency, work productivity, and the subjectivity of complaints of body pain as a result of inappropriate positions and workloads. In this study, 1 unit of circular model of shell cutting machine was designed and 1 unit of chair / seat. With anthropometric measurements of employees and through ergonomic calculations using the 5th percentile, the dimensions of the work table (cutting table) were obtained, the size of the table height was 87, 9 cm long table 110 cm and table width 64.3 cm. Then the dimensions of the chair are also obtained as follows: seat base height 32.7 cm Chair base length 70.6 cm Chair base width 32.1 cm chair back height 56.8 cm cm, seat back width 44.5 cm After applying the principles of ergonomics, based on the results of the Nordic Body Map questionnaire, it was found that the application of ergonomic principles to work tools for clam shell workers resulted in a 128% decrease in musculoskeletal complaints. In addition to this, it also resulted in a decrease in fatigue levels of 103%. . This shows that the application of ergonomic principles has a positive impact on employees
ANALISA USAHA LAUNDRY (HOOP LAUNDRY) DI KOTA MATARAM DENGAN METODE BREAK EVEN POINT (BEP) Wijana, Made; Wirya A., I.G.A.K. Chatur Adhi; Boli, B.V.S.
Energy, Materials and Product Design Vol. 2 No. 1 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Laundry is a business in the field of clothes washing services where dirty clothes are processed until clean and ready to distributed, this business is very promising because of the high level of demand for this service. Therefore, business actors in this field, namely Hoop Laundry, to continue to develop, must be supported by maximum profits by doing profit planning to find out whether this business is profitable or not.To plan profit, a tool is needed, one of which is the determination of the break- even point. In profit planning, break even point analysis is a profit planning approach that is based on the relationship between costs and income.The results of this study, it is known that the average number of kg of laundry per month produced is 1,702.52 kg with a Fixed Cost (FC) of Rp. 25,510,500 and Variable Cost (VC) of Rp. 61,828,852.5. From the laundry price per kg (p) which is IDR 6,000 the number of kg of laundry produced to reach the Break Even Point (BEP) condition is12,984 kg of laundry with a time of 7.6 months where the total expenses (TC) are equal to the total income (TR) which is IDR 77,902,498
ANALISA PERFORMA HEAT EXCHANGER TIPE SHELL AND TUBE PADA PROSES PENDINGINAN PELUMAS SAG MILL DI AREA GRINDING CONCENTRATOR AREA 130 PT. AMMAN MINERAL NUSA TENGGARA Joniarta, I Wayan; Santosa, Wahyudi; Wijana, Made
Energy, Materials and Product Design Vol. 2 No. 1 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

In the industrial world, the use of heat exchanger has an important role in helping the production process, especially in PT. Amman Mineral Nusa Tengggara. Heat exchanger which is used in various production process installations is basically a place to exchange energy in the from of heat from one fluid source to another. In the operation of a heat exchanger on a Semi Autogenous (SAG) mill this process is called oil conditioning, namely oil conditioning involving cooling and filtration in oil to coll the lubricant on the bearing SAG mill. This shell and tube type heat exchanger greatly influences the entire set of processes, because the operation caused by mechanical or operational failure can stop the operation of the unit. In this study do a comparison between the design specifications with the results of observations in the field in the morning and evening. Observations for 5 times were then analyzed using heat transfer to determine thermal load, heat transfer rate, heat transfer coefficient, LMTD, TDC. The results of these calculations can show that the heat exchanger in the morning has better performance. This is evident from its high effectiveness in the morning. However, the heat exchanger damages the leakage of the tube resulting in the mixing of oil with water and impurities from the cooling water quality from poor water flow can cause a decrease in performance on the heat exchanger.
ANALISIS EFISIENSI POMPA SENTRIFUGAL PADA DESALINASI DENGAN PROSES REVERSE OSMOSIS: ANALYSIS OF CENTRIFUGAL PUMP EFFICIENCY IN DESALINATION WITH THE REVERSE OSMOSIS PROCESS Joniarta, I Wayan; Aprilian Dika, Ade; Wijana, Made
Energy, Materials and Product Design Vol. 3 No. 2 (2024): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

This study provides information for the desalination industry in an effort to improve the performance and efficiency of desalination systems using the reverse osmosis method. By paying attention to the factors that influence the efficiency of centrifugal pumps, the provision of clean water in areas experiencing a water crisis will be better. Reverse Osmosis (RO) is a system in desalination technology that is often used to replenish fresh water supplies. RO performance depends on the quality of sea water as the raw water source. RO works by utilizing osmotic pressure. Hydrostatic pressure which is greater than osmotic pressure is used to reverse the flow, thereby producing fresh water. RO utilizes a high-pressure pump process to flow seawater through a membrane polymer structure. In RO there is a main membrane module configuration which has two functions, namely supporting the performance of the RO membrane and providing efficient fluid management. The desalination system used at PT Perusahaan Air Indonesia America (PAIA) still uses centrifugal pumps and can produce a production capacity of 600-700 m3/day, and is still in the system upgrade stage. From the calculations that have been carried out, the pump efficiency value is 59.16%.
Co-Authors A.A. Alit Triadi, A.A. Alit AA Alit Triadi, AA Alit Agus Dwi Catur Ananda Putra, Yoga Raditya Aprilian Dika, Ade Bawa Susana , I Gede Boli, B.V.S. Chatur Adi W.A., I G.A.K. Emmy Dyah Sulistyowati, Emmy Dyah Fahrurrozi Firza Febriandi, Firza Gawahi, Fransiskus Risky I G.N.K. Yudhyadi, I G.N.K. I Kade Wiratama, I Kade I Made Nuarsa, I Made I Made Suartika I Nyoman Nugraha Ardana Putra I Wayan Darmadi I Wayan Joniarta Julidio, Alief Kurnia, Fikrihadi Made Nuarsa, Made Made Suartika Maharsa Pradityatama Marungkil Pasaribu Muhamad Sudrajadinata, Muhamad Muhammad Khoiliq, Muhammad N. Nurchayati, N. Nur Kaliwantoro Nurchayati Nurchayati Putra, Ardi Wijaya Ramadhan, Galang Baruna Rohil, Lalu M. Santosa, Wahyudi Suartika , I Made Tri Rachmanto, Tri Triadi, Anak Agung Alit Usman, Zohimundin Wirya A., I.G.A.K. Chatur Adhi