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Pengaruh Kinerja Hidraulik Kontrol Valve Setelah Overhaule Terhadap Governor Mesin Turbin Uap Pada PLTU (Media Group 1 x 15 Mw) Pribadyo Pribadyo; Zulkifli Said
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 4, No 2 (2018): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (973.519 KB) | DOI: 10.35308/jmkn.v4i2.1605

Abstract

PLTU di Desa Kuta Makmue Kecamatan Kuala Kabupaten Nagan Raya dengan kapasitas terpasang 1x15 MW beroperasi sejak tahun 2009 mengunakan Turbin tipe BBC NEW ALSTOM BD2EEQ2E38 yang diproduksi pada tahun 1970 tergolong dalam Sistem Manual Operasi, namun seiring dengan lamanya pengoperasian turbin dan bertambahnya jam operasional serta kendala teknis maupun non teknis yang dialami selama operasi mengakibatkan kinerja dari hidraulik kontrol valve berkurang dan mempengaruhi data karakteristik semula. Tujuan dari penelitian ini adalah mengkaji pengaruh kinerja control valve setelah overhaule terhadap governor pada turbin uap. Metode yang digunakan adalah studi pustaka dan studi lapangan yakni dengan meninjau langsung ke lapangan untuk pengakuratan data literature dan data lapangan yang menjadi objek dalam penelitian. Wawancara, yaitu menanyakan kepada orang-orang yang memahami tentang topik yang dikaji. Analisa data dilakukan guna mengetahui peroalan yang sebenarnya terjadi pada sistem yang dikaji selanjutnya dialkukan penanganan. Hasil penelitian dikatahui bahwa ukuran dimensi Bushing dan Sraight bar (Tuas valve lurus) mengalami keausan, keausan yang paling besar terdapat pada strainght bar hindraulik kontrol valve hingh pressure, perubahan nilai tersebut didapat setelah pengambilan nilai rata-rata dari komponen hidraulik. penanganan perbaikan dengan melakukan penambalan isi (Babit) pada sisi outside straingth bar yang terkikis, pembabitan tersebut dilakukan dengan menyamakan nilai rata-rata dari dimensi strainght bar.
Rancang Bangun Alat Pengolah Limbah Plastik Berbahan Bakar Biomassa Pribadyo Pribadyo
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 5, No 1 (2019): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (983.608 KB) | DOI: 10.35308/jmkn.v5i1.1623

Abstract

Plastic is a material that is widely used in daily life, because it has advantages such asstrong,  lightweight  and  stable. But  the  plastic  on  the market  today  are  synthetic polymers made from petroleum are difficult to decompose in nature. Judging from the nature of the plastic constituent is composed of components of petroleum hydrocarbons, the plastic waste has the potential to be converted into fuel. The technique used to restore the plastic material is by breaking the carbon chains or polymers that become hydrocarbons. The purpose of the design tool processing waste plastics into fuel oil- fired biomass is to design a waste treatment plant in the plastic to produce oil (fuel), making the design drawings of the equipment is planned, determine the materials to be used,  make  and  assemble  the apparatus  according  to  the  design  the planned. In pyrolysis occurs tool decomposition process of organic compounds on the materials. This decomposition caused by the heating process without dealing directly with the air with little oxygen. Waste processing equipment plastic that will be planned to include the design of the combustion chamber, reactor design, pipeline design fence steam, design connecting pipe between the reactor and the pipe fence steam. Extensive volume of reactor tubes obtained then has acquired equipment capacity 4 kg / production.
Uji Kualitas Briket Batu Bara Campur Biomassa Cangkang Biji Karet Dan Tepung Kanji Sebagai Perekat Pribadyo Pribadyo
Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi Vol 2, No 2 (2016): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1042.829 KB) | DOI: 10.35308/jmkn.v2i2.832

Abstract

Briquetting is the process of small particles agglomerate or without a binder into a certain shape and size with the properties of certain physical and chemical also aimed to improve the quality and efficiency as fuel and easy to use. This study aimed to test the quality of coal briquettes rubber seed shells mixed biomass and starch as an adhesive. The benefits of this research is as an effort to capitalize upon the waste biomass and coal in West Aceh as fuel. In this study the composition of the mixture for each raw material is 70% coal, 20% rubber seed shells and 10% starch, whereas the mesh size varied 30 and 50 with strong briquettes printing press is equal to 120 kgf/cm2. Toughness testing is done using the drop test, moisture content, ash content and density are calculated using a mathematical equation while the calorific value is calculated by automatical calorimeter. The results of water content to 30 mesh size average is at 0415 % and moisture content to a mesh size of 50 is 00:45%. Calorific value for the size of the mesh 30 is equal 4847.2 kal/g and a calorific value of 50 mesh size is equal to 4797. 2 kal/g. ash content to 30 mesh size was 0.13 % and for the size of the mesh 50 is 0.10%. Briquettes toughness analysis results with the drop test for mesh size 30 is sebesar 0,03% and for the size of the mesh 50 is 0.04%. The results of the average density of the mesh size of 30 is 5.10 g/cm3 dan average density of 50 mesh size is equal to 5.45 g/cm3 and the composition of the mixture of coal 70%, biomasssa shell rubber and adhesive 20% 10% with a pressure of 120 kgf/cm2. Keywords: Coal, shell bean gum, starch , automatical calorimeter , testing
RANCANG BANGUN MESIN PENGERING VERTIKAL DENGAN PENGADUKAN MEKANIK UNTUK BIJI-BIJIAN Pribadyo Pribadyo
Jurnal Ilmiah Teknik Mesin POROS Vol 15, No 2 (2017): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (475.855 KB) | DOI: 10.24912/poros.v15i2.1272

Abstract

Abstract: The reduction of water content to a certain extent for cereals in the form of grain can be done through several methods, one of which is drying with heating. The purpose of this research is to design a prototype drying machine with a vertically screw-shaped mechanical screw. The drying machine is designed using heater and mixer working principles, wherein the heater is used for the drying process by engineering the heating air, while the mixer is used for the stirring system on the material to be dried. Tool design includes: Screw, Casing wire, Casing House and chassis. The wire casing design is based on the incoming heat flow rate and exhaust heat flow rate with the parameters of air velocity of entry and exit air velocity is known. The result of air velocity is 0.25 m2/s and the air velocity is 0.42 m2/s. Thus, the incoming heat flow rate is 0.5 kg/m3, and the outflow heat rate is 0.52 kg/m3. The volume of the contents of the wire casing of 7,5 kg/cm3. Screw designed with length (p) 60 cm, width of the upper arm (la) 28.8 cm, width of the forearm (lb) 22 cm. Wire casing is designed with length (p) 100 cm, width of upper arm (la) 50 cm, width of forearm (lb) 30 cm. The casing is designed with length (p) 100 cm, width of the upper arm (la) 70 cm, width of the forearm (lb) 50 cm, The chassis is designed with length (p) 107 cm, width of the upper arm (la) 77 cm and arm width Bottom (lb) 77 cm. And supported aids in the form of: Electric motor that serves as a driving force in the stirring system with a capacity of 450 rpm motor rotation is reduced with the transmission belt puly. Based on the results of the design has been successfully made prototype vertical dryer machine with mechanical stirring for grain. 
PENGARUH KOMPOSISI DAN KUAT TEKAN TERHADAP TINGKAT KERAPUHAN BRIKET ARANG BIOMASA CAMPUR BATUBARA DENGAN TEPUNG KANJI SEBAGAI PEREKAT Dailami Dailami; Pribadyo Pribadyo; Hanif Hanif
VOCATECH: Vocational Education and Technology Journal Vol 2, No 1 (2020): October
Publisher : Akademi Komunitas Negeri Aceh Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38038/vocatech.v2i1.44

Abstract

Abstract West Aceh is one of the regions in Aceh Province that has natural resources in the form of coal mines and biomass in the form of rice husks, sawdust, peanut shells and coconut shells which have not been utilized. One of the efforts to exploit this potential is by processing it into bioarang coal briquettes into alternative fuels through the briquette process. The purpose of this study was to determine the level of brittleness in the manufacture of coal and biomass briquettes. The research was conducted by varying the mass composition of the mass weight of the mixture between coal and sawdust biomass, rice husks, coconut shell and peanut shells by 50%, 60%, 70% for coal and 40%, 30%, and 20% for biomass. The adhesive (glue) in the form of starch is 10%. Pressure applied is 80 lb/in2, 100 lb/in2 and 120 lb/in2. The test used the drop test method with the calculation procedure using the ASTM D 440-86 r02 standard. The results showed that the ratio of the composition of the mixture of raw materials and pressing pressure had an effect on the brittleness of the briquettes. The highest brittleness was obtained at a composition ratio of 50% coal: 40% coconut shell: 10% starch at a pressure of 80 lb/in2 obtained a weight of 24, 24 grams. The lowest brittleness is obtained at a mixture composition of 60% coal: 30% peanut shell: 10% starch at a pressure of 80 lb/in2, the weight is 29.7 grams. Keyword Coal, biomass, starch, hydraulic pressure. __________________________ Abstrak: Aceh Barat merupakan salah satu wilayah di Provinsi Aceh yang memiliki sumber daya alam berupa tambang batu bara serta biomassa berupa sekam padi, serbuk kayu, kulit kacang tanah serta tempurung kelapa yang belum termanfaatkan. Salah satu upaya untuk memanfaatkan potensi tersebut adalah dengan cara diolah menjadi briket bioarang batu bara menjadi bahan bakar alternatif melalui proses pembriketan. Tujuan dari penelitian untuk mengetahui tingkat kerapuhan pada pembuatan briket campuran batubara dan biomasa. Penelitian dilakukan dengan memvariasikan komposisi berat masa campuran antara batu bara dan biomasa serbuk kayu, sekam padi, tempurung kelapa dan kulit kacang tanah sebesar 50%, 60%, 70% untuk batubara dan 40%, 30%, dan 20% untuk biomasa. Bahan perekat (lem) berupa tepung kanji sebesar 10%. Tekanan diberikan sebesar 80 lb/in2, 100 lb/in2 dan 120 lb/in2. Pengujian menggunakan metode drop test dengan prosedur perhitungan menggunakan standar ASTM D 440-86 r02. Dari hasil penelitian menunjukkan bahwa perbandingan komposisi campuran bahan baku dan tekanan pengepresan berpengaruh terhadap tingkat kerapuhan briket. Kerapuhan tertinggi diperoleh pada perbandingan komposisi sebesar 50% batu bara: 40% tempurung kelapa: 10% tepung kanji pada tekanan 80 lb/in2 diperoleh berat 24, 24gram. Kerapuhan terendah diperoleh pada perbandingan komposisi campuran 60% batu bara: 30% kulit kacang tanah:10% tepung kanji pada tekanan 80 lb/in2 diperoleh berat 29, 7gram. Kata kunci Batu bara, biomassa, tepung kanji, tekanan hidraulik __________________________
Analisis Kerusakan Sistem Hidrolik pada Boom Silinder Unit Eskavator Komatsu PC 200-7 di PT. Wirato Mitra Mulia Nofal Olifanta nofal; Pribadyo pribadyo; Herri Darsan
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 2 No. 5 (2022): COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v2i5.275

Abstract

Boom cylinder is a component of the excavator which is located on the left and right front. This component works to move the bucket optimally by utilizing hydraulic oil flow. Boom cylinders will experience a decrease in performance if there are problems and damage to their internal parts. This Scientific Paper Analysis collects data from various direct observations in the field and makes improvements to the tools. boom cylinder malfunctions get information from the chief maintenance mechanic and experienced mechanics. This can be a basic problem of analysis, performance disturbances in the boom cylinder components can be caused by several factors, one of which is contamination that occurs in the boom cylinder. there is no inside and outside, and the occurrence of overheating in the boom part of the cylinder components. The causes of damage to the cylinder boom are very diverse, this can occur due to certain factors, including the use of the unit by the operator, steep work terrain and many other determining factors that damage the components of this cylinder boom. The problem of thinning the cylinder boom can be carried out according to procedures, capacity that is not excessive according to work standards, and daily, daily and monthly maintenance.