cover
Contact Name
Gurum Ahmad Pauzi
Contact Email
jtaf@fmipa.unila.ac.id
Phone
+6282177426544
Journal Mail Official
jemit@fmipa.unila.ac.id
Editorial Address
Jurusan Fisika, FMIPA, Universitas Lampung Jl. Prof. Soemantri Brodjonegoro No. 1
Location
Kota bandar lampung,
Lampung
INDONESIA
Journal of Energy, Material, and Instrumentation Technology
Published by Universitas Lampung
ISSN : 27472043     EISSN : 2747299X     DOI : https://doi.org/10.23960/jemit
Ruang lingkup penulisan dalam jurnal ini meliputi: 1. Fisika Teori Mekanika Klasik Elektromagnetik Termodinamika Mekanika Statistik Mekanika Kuantum Teori Relativitas Kuantum Gravitasi Astrofisika Kosmologi 2. Fisika Bumi (Geofisika) Geothermal Geolistrik Seismik Geomagnet 3. Fisika Material Nanomaterial Logam dan Korosi Material Magnetik Thin Film Fotokatalis/Katalis Semikonduktor Superkonduktor Keramik Polimer 4. Elektronika dan Instrumentasi Sensor Instrumentasi Biomedik Instrumentasi Pertanian Instrumentasi Lingkungan Biofisika Fisika Komputasi Laser 5. Fisika Nuklir Keselamatan Reaktor Analisis Neutronik Manajemen Bahan Bakar dan Limbah
Articles 57 Documents
Web Monitoring CO, CO2 dan Suhu secara Real Time Ahmad Zainuri; Gurum Ahmad Pauzi; Junaidi; Warsito
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463.661 KB) | DOI: 10.23960/jemit.v1i1.4

Abstract

This research is related to making a web to display data on CO, CO2 and temperature monitoring results in real time. The measuring instrument used consisted of an MQ-7 sensor to detect CO gas, a MQ-135 sensor to detect CO2 gas, a DHT-22 sensor to measure the temperature and a microcontroller as a control system. CO, CO2 and temperature measurements were carried out at the University of Lampung with 10 different points. Measurements were made for three days in the morning, afternoon and evening with the duration of measurement of each location 5 minutes. Measurement data is displayed on the PC server using an interface created through the Visual Basic 2010 program and saved to the Mysql database. Data from the database is sent to the web server. Based on the results of tests conducted, the web monitoring system is running well. The web can display CO, CO2 and temperature measurement data in the form of graphs and tables in real time. The web can be accessed by web browser at devices that are connected to the internet.
Pengaruh Variasi Waktu Sintering Terhadap Pertumbuhan Fase Bahan Superkonduktor BSCCO-2212 dengan Kadar Ca=1,10 Menggunakan Metode Pencampuran Basah Karlina Rahmah; Suprihatin Suprihatin; Pulung Karo Karo
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (500.906 KB) | DOI: 10.23960/jemit.v1i1.5

Abstract

This research was conducted to determine the effect of sintering time on the formation of the superconducting phase BSCCO-2212 by calculating the level of purity of the phases formed and looking at the microstructure. The variation of sintering time was 10, 20, 30 and 40 hours using the wet mixing method. The sample was calcinated with 800 °C for 10 hours and sintered with 830 °C. The XRD’s characterization result shows a decrease in phase purity with increasing the sintering time. The relative high volume fraction of the BSCCO-2212/ts10 sample is 90,48% while, the lowest volume fraction of BSCCO-2212/tc40 is 50,74%. The relative high orientation degree of BSCCO-2212/ts20 is 18,47% and the lowest orientation degree of BSCCO-2212/ts10 is 8,4%. The SEM’s characterization result shows of all samples have been oriented and have relatively little space between slabs (voids).
Desain High Temperature Gas-Cooled Reactor (HTGR) Model Geometri Heksagonal Dua Dimensi dengan Bahan Bakar Thorium Hasil Daur Ulang Mutia Utari; Yanti Yulianti; Agus Riyanto
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.399 KB) | DOI: 10.23960/jemit.v1i1.6

Abstract

The Research about the design of high temperature helium gas-cooled reactor (HTGR) terraces with thorium fuel recycled using the SRAC program has been completed. This research includes the percentage of fuel enrichment, reactor core size, reactor core configuration, criticality, and the distribution of the power density. The calculation of reactor core is done in two dimensions \sfrac{1}{6} hexagonal terrace section with a triangular mesh. The fuel is used, i.e. thorium with a burn-up of 20 GWd/t and 30 GWd/t, and helium gas as a cooler. The results obtained in this study show that the ideal HTGR reactor core design with reactor core size and configuration are (x) 22 cm at point (y) = 2035,05 cm and at (y) 11 cm at point (x) = 2035,05 cm, then enrichment in fuel 8%. The result of maximum power density is 550.3685 Watt/cm3 where the position at (x) = 22 cm and axis (y) = 11 with the effective multiplication factor value keff of 1,0000002.
Perhitungan Burn Up pada Reaktor HCLWR Model Geometri Heksagonal Dua Dimensi BahanBakar Uranium menggunakan SRAC COREBN Wahyuning Ramadhanta Ardanti; Yanti Yulianti; Agus Riyanto; Syafriadi Syafriadi
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.126 KB) | DOI: 10.23960/jemit.v1i1.8

Abstract

This study about burn up calculations on the HCLWR reactor with two dimensional hexagonal geometric models of uranium using SRAC COREBN has been carried. This study used uranium-235 and uranium-238 as the fuels, light water as coolant and moderator. The calculation was done with computational simulation of COREBN. The calculation aims to produce a conversion ratio more than 1 and a critical multiplication factor (keff). The research used fuels enrichment, burn up period, burn up step, linier power and volume fraction parameters. The percentage of enrichment from U1 and U3 were 3% and U2 was 2,5%. The volume fraction of each material was 52% fuels, 12% cladding, and 36% coolant, the reactor operating period for 548 days with 6 step of burn up then the reactorpower is 2400 MW and the linear poweris 1,792722 MW/cm. The calculation of conversion ratio was 1,01233 and keff was 0,901.
Analisis Batubara Jenis Antrasit di PTBA Berdasarkan Kandungan Volatile Matter dan Kalori Yohanes W.M Purba; Pulung Karo Karo; Ediman Ginting
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (278.598 KB) | DOI: 10.23960/jemit.v1i1.9

Abstract

This research Coal is one of the sedimentary fossil fuels that can ignite, is formed from organic sediment, and the remains of plants are then formed through the process of coalification. The main element consists of carbon, hydrogen, and oxygen. The formation of coal has certain conditions and only occurs in certain eras throughout geological history. The carbon age was approximately 340 million years ago. In the Permian Age or the Paleozoic era, 270 million also formed the most productive coal which is almost the entire coal deposit (black coal) in other parts of the earth. In this study we conducted at the Laboratory of PT. Bukit Asam tbk. Observation Results in the Study of Average Volatile Matter 19.11, Max Volatile Matter value 38.34, Min Vollatie Matter value 11.34. And the Average Calorie Result of 7578.5 Kacl / Kg, Max Calorie Value of 8046 Kcal / Kg. In this study, it was proved that coal samples were Anthracite types.
Analisis Karakteristik Elektrik Onggok Singkong Fermentasi yang Diawetkan sebagai Pasta Bio-Baterai Yuli Erviana; Amir Supriyanto; Sri Wahyu Suciyati; Gurum Ahmad Pauzi
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (355.744 KB) | DOI: 10.23960/jemit.v1i1.10

Abstract

Bio-battery is defined as an energy storage device where the energy source comes from organic compounds. The electrical characteristics of the bio-battery can be obtained using to copper (Cu) and zinc (Zn) electrode pairs. Cassava pulp is used as the electrolyte. Cassava pulp is being fermented for 48 hours, 96 hours, and 144 hours and added 4% formalin. The electrolyte cell consists of 20 cell batteries in series with each mass is ±30 grams. The electrical characteristics of fermented cassava pulp are measured with 4 watts LED load and without load. The results show that the highest voltage is 20.66 V which is obtained by 144 hours fermented cassava pulp. The electrical characteristics in this research tend to constant due to the addition of preservatives (formalin).
Rancang Bangun Prototipe Pengoptimal Charging Baterai pada Mobil Listrik dari Pembangkit Tenaga Surya dengan Menggunakan Sistem Boost Converter Gurum Ahmad Pauzi; Diana Rahma; Sri Wahyu Suciyati; Arif Surtono
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (2020): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (732.064 KB) | DOI: 10.23960/jemit.v1i2.19

Abstract

In this research, the lithium-ion 48 Volt battery charging system's design was carried out on the prototype electric car using the boost converter tool. Boost converter consists of several circuit systems, namely oscillator circuit, trigger circuit, switching circuit, inductor, and DC output. IC TL 494 as pulse and frequency wave generator, used to regulate the switching process on the MOSFET circuit in the boost converter. This research was conducted by presenting variations in the inductor wire's diameter to determine the result of the current output used for the filling process by varying the diameter by 0.8 mm, 4 mm, and 8 mm. The number of wire twists used remains 5:27 and produces an output voltage boost converter of 54 Volts. The results showed the inductor wire's diameter affected the output of the boost converter and the length of battery charging time on the electric car. The length of time of battery draining at the wire's diameter is 0.8 mm, which is for 680 minutes, at the wire 4 mm diameter for 290 minutes, and at the diameter of the wire, 8 mm is for 400 minutes. The boost converter has the advantage of being more efficient in terms of dimensions, resulting in 3 times the voltage and power increase compared to the input voltage. The maximum panel input power of 14.5 Watts when added boost converter maximum power increased by 47.84 Watts.
Sintesis dan Karakteristik Struktur, Sifat Fisis, dan Sifat Mekanik Komposit Aspal Silika dengan Variasi Komposisi Aspal Silika (20%:80%wt; 15%:85%wt; 10%:90%wt) Enang Widwiyantoro; Simon Sembiring; Syafriadi Syafriadi; Suprihatin Suprihatin
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (2020): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.32 KB) | DOI: 10.23960/jemit.v1i2.20

Abstract

Synthesis and characterization of asphalt silica composites with various compositions have been carried out 20%: 80%wt; 15%: 85%wt; 10%: 90%wt. Silica synthesis was carried out using the sol-gel method. The materials used are rice husks, solid asphalt, distilled water, gasoline, NaOH 1,5% and HNO3 10%. This research was conducted for knowing the effect variations composition of asphalt silica on the phase structure, physical, and mechanical properties. The results of characterization asphalt silica composites with X-Ray Diffraction (XRD) obtained nothing change of phase and so that the phase structure still amorphous that consist of amorph silica and amorph carbon. The result of water adsorbent testing obtained that all variation was infest the standard, which was above 10%. The result compressive strength testing obtained the variation 15%:85%wt got the highest value amount 47,55 Mpa.
Karakteristik Struktur Mikro Komposit Aspal Silika Sekam Padi Dengan Variasi Komposisi (20%:80%, 15%:85% dan 10%:90%) Qori Sari Dewi; Simon Sembiring; Syafriadi Syafriadi; Ediman Ginting
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (2020): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.954 KB) | DOI: 10.23960/jemit.v1i2.23

Abstract

Synthesis and characterization of rice husk and asphalt silica composites with various compositions have been carried out 20%: 80%, 15%: 85% and 10%: 90%. Silica synthesis from rice husk wa carried out using the sol-gel method. The materials used are rice husks, solid asphalt, distilled water, gasoline, NaOH and HNO3. This research was conducted of variations in the composition the effect of silica and asphalt on the microstructure and structure of the sample. The characterization results of Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM-EDS) on the surface of silica asphalt composites in the form of erratic clots and cracks on the surface of the sample with an average grain size of 3.483 µm, 8,127 µm, and 7,192 µm. The analysis EDS results in the elements content contained in the sample elements of carbon (C), silicon (Si), oxygen (O), a little element of sulfur (S) and aluminum (Al). Then, the results of the X-Ray Diffraction (XRD) characterization obtained the structure of amorphous silica and amorphous carbon.
Simulasi Dinamika Molekul Berbasis Kode LAMMPS untuk Mengkaji Titik Leleh Bahan Besi (Fe), Timbal (Pb) dan Aluminium (Al) Piana Hartina; Sri Wahyu Suciyati; Amir Supriyanto; Junaidi Junaidi
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 2 (2020): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.169 KB) | DOI: 10.23960/jemit.v1i2.24

Abstract

Telah dilakukan penelitian dengan tujuan memperoleh model simulasi dinamika molekul bahan Al, Fe, Pb terkait struktur kristal dan karakteristik bahan saat mencapai titik leleh. Metode simulasi titik leleh ini menggunakan simulasi dinamika molekul kode LAMMPS dengan mengunakan potensial Finnis-Sinclair EAM dan menggunakan persamaan algoritma velocity-verlet. Analisis nilai titik leleh dilakukan berdasarkan grafik perubahan fase (padat-cair) antara nilai energi potensial dan suhu dari masing-masing bahan yang diperoleh dari output LAMMPS. Hasil output LAMMPS berisi data posisi atom-atom dalam format XYZ, dan juga diperoleh informasi berupa step integrasi, energi potensial, suhu, volume, dan tekanan. Hasil visualisasi terlihat bahwa struktur kristal aluminium mencapai titik leleh saat suhu 948,51°C, timbal mencapai titik leleh saat suhu 952,92°C, besi mencapai titik leleh saat suhu 1521,25°C. Visualisasi struktur kristal bahan saat mencapai titik leleh menggunakan software OVITO dan untuk menganalisis karakteristik stuktur kristal bahan dengan kurva fungsi distribusi radial mengunakan software ISAACS.