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Gian Villany Golwa
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Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Rancang bangun prototye system pico hydro pada penampungan air perumahan dengan metode VDI 2221 Tony Indra Kusuma; Candra Bagus Prasetyo; Maulana Abdul Jabar; Gian Villany Golwa
JURNAL MECHANICAL Vol 11, No 1 (2020)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v11.i1.202004

Abstract

Pemanfaatan energi baru dan terbarukan untuk pembangkit listrik di indonesia belum optimal. Oleh karena itu perlu adanya trobosan untuk menciptakan berbagai energi alternatif melalui pemanfaatan hydropower disekitar kita. Pico hydro adalah suatu pembangkit listrik berskala kecil yang menggunakan tenaga air sebagai penggeraknya, misalnya saluran irigasi, sungai atau air terjun alam dengan cara memanfaatkan tinggi terjunnya air (head) dan jumlah debit air maupun tekanan airnya. Pemilihan tubin screw didasari dari hasil pengambilan data dilapangan yang menghasilkan debit sebesar 0,0003 m3/s dan ketinggian head 0,25 m. Turbin screw adalah salah satu tipe turbin air yang berpotensi untuk pembangkit listrik skala kecil dimana turbin air tipe ulir ini sangat cocok untuk head turbin yang rendah. Pada perancangan ini metode yang digunakan adalah metode VDI 2221 atau metode sistematis dengan empat tahapan yaitu penjabaran tugas,perancangan konsep, perancangan wujud, perancangan terinci yang kemudian ditetapkan varian II sebagai alternatif rancangan yang terbaik dimana vairian II menghasilkan nilai total yang paling tinggi yakni 7,88. Dari hasil perhitungan berdasarkan jumlah debit dan head didapatkan daya turbin sebesar 0,73575 watt dan kapasitas daya generator sebesar  0,5886 watt.
Analysis of Characteristics of S45C Steel Changes due to the Quenching and Tempering Process Gian Villany Golwa; Dedik Romahadi; I Gusti Ayu Arwati
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, University of Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48181/wcej.v6i2.17611

Abstract

S45C steel has a carbon content of 0.50% and its classified as medium carbon steel. The main element content of S45C is carbon (C) is 0.50%, sulphur (S) is 0.035%, and manganese (Mn) is 0.80%. Tempering is a heat treatment process in which the hardening or normalizing process was previously carried out on steel. The research method was carried out where the steel was heated below the critical temperature and cooled. Quenching is a process of rapidly cooling the material from austenitizing from a temperature range of 815 °C to 870 °C for steel. S45C steel was quenched at 950 °C for 120 minutes, then tempered at 700 °C, and 500 °C for 120 minutes. The raw material sample (without heat treatment) is the initial reference standard among the samples undergoing the heat treatment process. They are then analyzed, and the influence and changes in the characteristics after that. In addition, changes in mechanical properties due to the heat treatment process experienced by S45C steel use tensile tests, Charpy impact tests, hardness tests and microstructures. The research results on the quenching process sample were tempered at a temperature of 500 °C and held for 120 minutes, increasing tensile strength by 17.1% and yield strength of 56.82%.
Co-Authors Candra Bagus Prasetyo I Gusti Ayu Arwati Maulana Abdul Jabar Romahadi, Dedik Tony Indra Kusuma