PT Bukit Asam (Persero) Tbk., a state-owned coal mining company, operates in the Tanjung Enim area of South Sumatra with a Mining Business Permit (IUP) covering 66,414 hectares. Coal extraction is carried out using an open-pit surface mining method, where overburden is excavated and transported to designated waste dump or backfilling areas. The Tanjung Enim Mining Unit (UPTE) consists of three …
Biodegradable foam (biofoam) as a food packaging material is an alternative to conventional styrofoam packaging products that are more environmentally friendly because they can be decomposed naturally so that they do not cause environmental pollution. This experiment aims to determine the effect of the addition of rice husk biosilica in the manufacture of biofoam based on cassava starch and oth…
This study analyzes the effect of groove height and powder inlet angle on the powder output characteristics in the Direct Laser Metal Deposition (DLMD) process using Computational Fluid Dynamics (CFD) simulation. The nozzle design was created in SolidWorks with variations in groove height of 35 mm, 40 mm, and 45 mm and inlet angles of 20°, 25°, and 30°, resulting in nine configurations. The …
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Judul Asli: MECHANICS OF MATERIAL, Fourth Edition
Judul Asli: Mechanical metallurgy, 3rd Edition
Aliran fluida yang melewati suatu sistem perpipaan akan mengalami kerugian aliran. Kerugian ini bisa disebabkan oleh beberapa hal diantaranya gesekan, bentuk saluran dan ukuran, serta adanya sambungan-sambungan. Kerugian tersebut sebaiknya bisa diketahui berapa besarnya. Untuk itu penulis mencoba melakukan percobaan terhadap aliran fluida yang dipengaruhi akibat adanya sambungan pada sistem sal…
Penelitian ini bertujuan untuk (1) Mengetahui pengaruh-pengaruh yang terjadi bila suatu aliran mengenai bidang miring, (2) Mengetahui karakteristik fluida ketika melalui bidang miring, (3) Mendapatkan perbandingan tekanan pada masingmasing plat miring, (4) Mendapatkan perbandingan kecepatan pada masing-masing plat miring, dan (5) Mengetahui hubungan antara perhitungan teori dengan keadaan yang …
Fluid Friction Apparatus adalah seperangkat alat yang didesain untuk melakukan pengujian kerugian tinggi tekanan pada aliran fluida dalam pipa (dalam hal ini fluida yang digunakan adalah nira tebu dan air). Alat ini telah dilengkapi dengan peralatan - peralatan yang berhubungan dengan pengujian. Sehingga penguji hanya melakukan pengujian sesuai dengan petunjuk untuk melakukan pengujian ( manual…
Rich Solution Preheater merupakan salah satu alat penukar kalor jenis shell and tube yang mempunyai jumlah pass pada tube dan shell-nya. masing-masing adalah 1-1, serta mempunyai tipe aliran counterflow. Alat ini digunakan untuk memanaskan J2,5% Aqueous Sol yang berada dalam shell dengan mengalirkan 4% Aqueous Sol dalam tube. Berdasarkan pada hasil pengamatan yang dilakukan, temperatur dan teka…
One of the causes of airplane accidents on the ground was the presence of water puddles on the runway. To address this problem, the development of an automatic sensor system that could accurately measure the height of water puddles on the runway was required. This study focused on investigating the crashworthiness and fracture capability of sensor frames made of ST 37 steel. Three different sen…
The gas lift method is a method of removal of the fluid in which a relatively high gas pressure (250 psi minimum) is used as a medium lifting through a mechanical process with the help of a compressor. Planning and execution of appropriate gas lift designs will provide optimal production at production wells. PT Medco E & P Indonesia is one of the companies that apply the gas lift method at the …
Kecepatan air menembus tanah melalui rongga-rongga tanah baik secara horizontal maupun vertikal disebut permeabilitas tanah. Koefisien permeabilitas tergantung pada distribusi ukuran partikel, bentuk partikel, dan struktur tanahnya. Permeabilitas tanah sangat mempengaruhi proses pelaksanaan konstruksi serta pasca konstruksi. Pada tanah lempung ekspansif yang merupakan tanah yang memilihi sifat …
PT Medco E&P Indonesia at Singa Field produces approximately 40 mmscfd of natural gas power plants for sale purposes. Composition of natural gas Singa Field is dominated by methane gas with impurities such as hydrogen sulfide gas (FLS) and carbon dioxide (CO2) to be derived gases sold presentations that meet desired specifications. The content of CO2 and H2S in the feed gas respectively by 38.4…
Onmi-directional robot has the advantage of movement when compared to other cars robots, where motion can be generated with the flexibility of linear and rotational rnotion that can be done simultaneously or independently. This is due to the omnidirectional robot using special wheels called omni-directional wheels. Omnidirectional wheel is a unique because it has the ability to move freely in b…
Nanofluid is a suspension containing nanoparticles or a fluid with nanoparticles dispersed in it. The addition of surfactants to nanofluids aims to increase the dispersion properties of particles by reducing the surface tension of the liquid. The nanofluid preparation process is an important role in this research to obtain accurate results. Nanofluid preparation in this study used a two-step me…
Tectonically, the research area is located in the South Sumatra Basin. The South Sumatra Basin is known as a complex geological area. In general, the research area is located in the Early Postrift (Early Miocene-Middle Miocene). In the Talang Baru area, research on the diagenesis of the Gumai Formation calcareous sandstone has not been carried out comprehensively, so this study aims to determin…
Nanofluid is a solution consisting of nanoparticles dispersed in a base fluid, typically derived from metals, metal oxides, and various forms of carbon. The addition of nanoparticles to the fluid enhances its thermal, mechanical, and electrical properties. To ensure the stability and uniform distribution of nanoparticles within the fluid, surfactants are used as agents to stabilize and disperse…
Sumur “X” merupakan sumur migas pada lapangan pengembangan di daerah Rimau dengan metode area pengangkatan fluida menggunakan sucker rod pump. Laju produksi teraktual yaitu 120 BFPD. Berdasarkan analisa kurva IPR (Inflow Performance Relationship), laju produksi maksimalnya mencapai 433 BFPD (Barrel Fluid per Day). Nilai efisiensi volumetris pompa (Ev) sebesar 48% tergolong rendah. Untuk men…
Secara umum metode produksi minyak bumi dibagi dua, yaitu metode sembur alam {natural flow) dan pengangkatan buatan {artificial lift). Sembur alam merupakan metode mengalirnya fluida dari zona perforasi ke permukaan sumur secara alamiah, hal ini disebabkan oleh tekanan reservoir yang mendorong fluida naik ke permukaan masih sangat tinggi. Seiring diproduksinya sumur tersebut,maka tekanan reserv…