Hasil Pencarian  ::  Simpan CSV :: Kembali

Hasil Pencarian

Ditemukan 2 dokumen yang sesuai dengan query
cover
Angga Arianda
"ABSTRAK
Pertumbuhan minat akan produksi biofuel dari minyak nabati telah memicu peningkatan permintaan crude palm oil (CPO) yang merupakan sumber potensial untuk pembuatan biofuel. Namun, terdapat masalah yang dihadapi dalam proses transportasi fluida dengan memanfaatkan sistem perpipaan untuk berbagai aplikasi industri. Masalah tersebut termasuk konsumsi daya pompa yang tinggi karena adanya hambatan aliran yang tinggi dan sedimentasi oleh kristal yang terbentuk dari proses pengkeruhan dalam aliran CPO. Surfaktan nonionik umumnya digunakan sebagai penurun titik keruh (cloud point) dan juga dikenal sebagai drag reducing agent yang baik. Penelitian ini bertujuan untuk melakukan penyelidikan tentang efektivitas surfaktan nonionik sebagai drag reducing agent dalam menciptakan pengurangan hambatan pada aliran CPO yang melalui pipa spiral segilima. Metodologi penelitian ini menggunakan metode eksperimental dan analisis numerik. Metode eksperimental dilakukan menggunakan pipa spiral pentagon dengan rasio pitch (P/Di) 10.8 dan pipa bulat dengan diameter dalam 4 mm sebagai pembanding. Analisis numerik dilakukan menggunakan computational fluid dynamics untuk membuat analisis lebih lanjut tentang penelitian ini. Efektivitas pengurangan drag dianalisis melaui faktor gesekan dan profil distribusi kecepatan. Berdasarkan hasil penelitian ini, konsentrasi surfaktan nonionik memberikan pengaruh signifikan pada pengurangan hambatan, sementara pipa spiral segilima dapat meningkatkan pengurangan hambatan yang lebih tinggi dibanding pipa bulat.

ABSTRACT
The growing interests to produce biofuels from vegetable oil have been triggering increases in demands for crude palm oil (CPO) as a potential source for biofuel production. However, there are problems encountered in the fluid transportation process utilizing piping systems for various industrial applications. Those problems include high consumption of fluid pumping power due to high drag resistance and sedimentation by crystallization results in the formation of cloud in CPO flows. Nonionic surfactant has commonly been used as a cloud points reducer and also known as a good drag reducing agent. This study aimed at conducting an investigation on the effectiveness of nonionic surfactant as a drag reducing agent to create drag reduction of CPO flow through pentagon spiral pipe. This research methodology ware experimental and numerical analysis. The experimental research uses a pentagon spiral pipe with pitch ratio (P/Di) 10.8 and a circular pipe with 4 mm inner diameter as a comparison. The numerical analysis uses computational fluid dynamics to create more investigation about this research. The effectiveness of the drag reduction was analyzed by friction factor and velocity profile distribution. Looking at the results of this study, nonionic surfactant concentrations deliver a significant influence on drag reduction, while pentagon spiral pipe promote higher drag reduction than circular pipes.
"
Depok: Fakultas Teknik Universitas Indonesia, 2020
S-pdf
UI - Skripsi Membership  Universitas Indonesia Library
cover
Karima Agustianti
"
ABSTRACT
The main energy sources in Indonesia generally still rely on fossil fuels, such as petroleum, coal and natural gas. Biofuel is a solution that can be applied as a substitute for fossil fuels. This research was conducted by simulating the biofuel production process and calculating the amount of carbon dioxide emissions produced. This simulation is done by modeling the hydroprocessing process using Unisim R390.1 by optimizing the operating conditions for each raw material. The Hydrotreatment process was varied at a pressure of 1-5 MPa and a temperature of 250oC - 350oC. shows that palm oil is the most effective in producing bioavtur at a temperature of 300oC and a pressure of 3 MPa, while nyamplung oil is the most effective for producing renewable diesel at a temperature of 300oC and a pressure of 3 MPa. The calculation of the number of emissions from the carbon dioxide life cycle shows that to produce 1 kg of biofuel, 3.82 x 103 kg of CO2 is produced
"
Depok: Fakultas Teknik Universitas Indonesia, 2020
S-pdf
UI - Skripsi Membership  Universitas Indonesia Library