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Specta Journal of Technology
Published by Institut Teknologi Kalimantan
ISSN : 25492713     EISSN : 26229099     DOI : https://doi.org/10.0610/specta.v2i3
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Environmental Science
SPECTA journal is published by Lembaga Penelitian dan Pengabdian kepada Masyarakat, Institut Teknologi Kalimantan, Balikpapann Indonesia. SPECTA is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in the field of Physics, Mathematics, Mechanical Engineering, Electrical Engineering, Chemical Engineering, Materials and Metallurgy, Civil Engineering, Industrial Engineering, Naval Engineering, Urban Planning, Informatics, Information System, Environmental Engineering, and Ocean Engineering. SPECTA accepts submission from all over the world, especially from Indonesia.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol. 3 No. 3 (2019): SPECTA Journal of Technology" : 5 Documents clear
Simulasi Numerik Karakteristik Pembakaran Pada Tangentially Fired Boiler Dengan Variasi Sudut Yaw Rindra Hosanova
SPECTA Journal of Technology Vol. 3 No. 3 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1151.552 KB) | DOI: 10.35718/specta.v3i3.57

Abstract

Coal is one of the energy sources that widely used for electricity, the age of coal reserves only remain 56 years, so it is necessary to make a study to reduce the consumption rate of coal with make an improvement on boiler efficiency which use tangentially fired boiler because it has good combustion. There are a problem in this type of boiler such as unbalance temperature and temperature deviation in superheaters and reheaters of the boiler. This research is made to study the effect of yaw angle modification to temperature in boiler. Method that used in this research is Computational Fluid Dynamic (CFD). Coal yaw angle modification in this research are +5º, 0º, -5º, -10º, dan -15º. Coal yaw angle modification have an effect to temperature distribution, wider yaw angle then larger the temperature deviation. The best coal yaw angle configuration is at -5º because it has the least temperature deviation on the upper furnace which minimize the risk of overheat on superheaters and reheaters. Keywords: CFD, yaw angle, tangentially fired boiler
Simulasi Pergerakan Tumpahan Minyak di Laut dengan Pengaruh Angin Nashrul Millah; Indira Anggriani; Kartika Nugraheni
SPECTA Journal of Technology Vol. 3 No. 3 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (921.256 KB) | DOI: 10.35718/specta.v3i2.67

Abstract

As a petroleum-producing country, Indonesia has a very important role in supplying national and international petroleum needs. The distribution of oil by sea raises the risk of spills and harms the marine environment, especially for marine life. Most oil spills in the marine environment can form a thin layer on the surface due to the movement of wind, waves, and currents. In this study, the oil spill movement model used the Shallow Water Equation (SWE) model and the equation for the movement of oil spills. The SWE model consists of the equation of mass and momentum derived from the law of conservation of mass which is derived into the equation of continuity and the law of conservation of momentum which is derived into the equation of conservation of momentum. In this model, ocean currents are affected by several disturbances in the form of wind gusts and friction with the bottom. The model is solved numerically through simulation using the finite volume method. Discretization is done by using a staggered grid approach, where the mass and momentum variables are discretized in different cells. From the simulation results, it appears that the movement of oil spills is influenced by wind direction and current. The simulation results also found that the speed of the movement of oil spills has increased in the early times, but then gradually.
Analisis Kesesuaian Kualitas Air Sungai dengan Baku Mutu Air untuk Budidaya Ikan Air Tawar di Kabupaten Tabalong Rezky Nur Astriyani
SPECTA Journal of Technology Vol. 3 No. 3 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (910.615 KB) | DOI: 10.35718/specta.v3i3.131

Abstract

The Minapolitan area in Tabalong District is one of the predominant areas from the point of economic interest based on Tabalong District's Urban Land Use Plan 2014-2034. The Minapolitan is the conception of fisheries economic development which it functions is in economy that consists of production, processing, and marketing the fisheries commodity, services, and other supporting activities. The fishery activities in Tabalong District are occurring mostly in Tabalong and Pemayaran River. The purpose of this research is to acknowledge the compatibility of water quality conditions based on water temperature, brightness, dissolved oxygen (DO), acidity level (pH), ammonia (NH3), and nitrite (NO2). The data analysis instrument is using descriptive through comparison of the current water quality condition upon the water quality standard of freshwater fisheries. The result shows that the water quality in Sungai Tabalong and Sungai Pemayaran consecutively for water temperature 28 oC and 30 oC, brightness 28 cm and 26 cm, dissolved oxygen (DO) 4,2 mg/L and 4 mg/L, acidity level (pH) 7, ammonia 3,33 mg/L and 0,25 mg/L and nitrite <0,3 mg/L. Overall the whole fish in the river of Tabalong District still could survive as well as the fisheries activities. However, controlling the activity around the river and the implementation of aquaculture technology is required to intensify the water quality.
USULAN PERBAIKAN SISTEM MANAJEMEN KESELAMATAN DAN KESEHATAN KERJA (SMK3) SEBAGAI UPAYA MEMINIMALISIR ANGKA KECELAKAAN KERJA MENGGUNAKAN METODE HAZOP (Studi Kasus : PT. XYZ) Muhammad Nur
SPECTA Journal of Technology Vol. 3 No. 3 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (368.171 KB) | DOI: 10.35718/specta.v3i3.152

Abstract

PT. XYZ is a company engaged in oil palm plantations and processing with its main commodity is the oil palm plantations (Elais Queineensis Jack). In 2018, thare are several occupational safety and health problems naamely occupational accidents experienced by special employees in the production processarea. The purpose of this study is to detemine the types of work accidents, the types of hazards created based on the risk materics. This study begins by identifying Hazard and risk and then looking for potential sources of occuptional hazard so that harm can be done using the Hazard and Operability Study (HAZOP) method. The research results have been carried out based on the process (Crude Palm Oil) found 8 sources of potential danger between : Loding Ramp Station, Sterilizer Station, Tippler Station, DigesterStation, Press Station, Clarification Station, Kernel Stationdan Boiler Station, then risk assessment : low risk, medium risk, high risk and extreme risk.
Adsorpsi Metilen Biru dan Kongo Merah pada Zeolit-X Hasil Sintesis dari Abu Dasar Nurul Widiastuti
SPECTA Journal of Technology Vol. 3 No. 3 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1366.856 KB) | DOI: 10.35718/specta.v3i3.157

Abstract

Penelitian ini bertujuan untuk menentukan kapasitas adsorpsi metilen biru dan kongo merah pada zeolit-X yang disintesis dari abu dasar. Adsorben zeolite-X disintesis dari abu dasar dengan metode peleburan menggunakan NaOH pada suhu 750oC dalam atmosfer udara. Hasil karakterisasi zeolit-X dari abu dasar dibandingkan dengan zeolit-X yang disintesis dari bahan murni. Kristalinitas dan luas permukaan zeolit-X dari abu dasar masih lebih rendah dibandingkan zeolit-X yang disintesis dari bahan murni. Luas permukaan zeolit-X dari abu dasar adalah 250,850 m2/g, sedangkan zeolit-X dari bahan murni sebesar 472,471 m2/g. Hasil uji kapasitas adsorpsi zeolit-X dari abu dasar untuk metilen biru dan kongo merah adalah 131,6973 mg/g dan 38,12684 mg/g, berturut-turut. Proses adsorpsi mengikuti persamaan isothermal Langmuir dengan mengikuti model kinetika adsorpsi orde kedua semu. Studi termodinamika mengindikasikan bahwa proses adsorpsi terjadi secara eksoterm dan bersifat spontan pada masing-masing temperatur

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