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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN JURNAL CRANKSHAFT Scientific Journal of Mechanical Engineering Kinematika
Apriandi, Riyki
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Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ANALISIS KINERJA TURBIN UAP BERDASARKAN PERFORMANCE TEST PLTU PT. INDOCEMENT P-12 TARJUN Apriandi, Riyki; Mursadin, Aqli
Scientific Journal of Mechanical Engineering Kinematika Vol 1 No 1 (2016): SJME Kinematika June 2016
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (570.011 KB) | DOI: 10.20527/sjmekinematika.v1i1.26

Abstract

This study aims to determine the performance of steam turbine PT. Indocement Tarjun Plant 12 by comparing the results of data obtained during each performance test in 1999, 2016, 2017, and 2018. This research data is taken from the control room of PT. Indocement Tarjun, variable data obtained in the form of load, main inlet steam temperature, main inlet steam pressure, HP heater feed outlet temperature, HP heater feed outlet pressure, main steam flow, and turbine by pass flow. The data is processed to get the turbine heat rate and the efficiency per time of each performance test and then averaging the data results over time, then comparing the turbine heat rate and the average efficiency of each performance test. The calculation of turbine heat rate using heat & mass balance method, turbine efficiency is obtained by comparing the energy of 1 kW with turbine heat rate and multiplying 100%. The result of the average heat turbine calculation per performance test ie August 1999 is 2.546, April 2016 2,537, June 2017 2.56, and May 2018 2.67. The average value of turbine efficiency in August 1999 was 39.30%, April 2016 39.43%, June 2017 39.07%, May 2018 37.46%. Turbine power plant performance of PT Indocement Tarjun Plant 12 decreased from 1999 to 2018 by 1.84%.
Pemodelan dan Analisa Respon Dinamis Impeller Pompa Sentrifugal Akibat Perbedaan Tekanan Hisap dan Tekanan Buang Dedy Sayogi, Muhammad Hariz; Apriandi, Riyki; Aldo, Jefri; Rahmany, Rijal Surya
JURNAL CRANKSHAFT Vol 8, No 1 (2025): Jurnal Crankshaft Vol.8 No.1 (2025)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v8i1.14045

Abstract

Pada penelitian ini dilakukan simulasi karakteristik respon dinamis impeller pompa sentrifugal dengan tegangan input 250 V dengan perbedaan tekanan fluida pada suction inlet dan discharge outlet. Terdapat tiga parameter respon dinamis impeller yang diamati yaitu perpindahan, kecepatan sudut dan percepatan sudut. Respon dinamis perpindahan impeler dianalisis dengan mensimulasikan interval waktu dari 0 detik hingga 10 detik. kondisi pertama puncak kecepatan sudut sekitar 0,1 rad/s lebih rendah dibandingkan kondisi kedua (sekitar 0,3 rad/s). Tanda negatif hanya menunjukkan amplitudo gelombang. Antara 1,02 detik hingga 1,04 detik, puncak kecepatan sudut pada kondisi pertama adalah sekitar 0,1 rad/s, sementara pada kondisi kedua sekitar 0,2 rad/s, kondisi pertama dengan tekanan lebih rendah di inlet dan outlet membutuhkan kecepatan sudut lebih kecil (2,8 rad/s) dibandingkan kondisi kedua dengan tekanan lebih tinggi, yang memerlukan kecepatan sudut sedikit lebih tinggi (2,77 rad/s) pada waktu yang sama. Respons dinamis percepatan sudut impeler dianalisis pada kondisi awal dan keadaan stabil. Pada kondisi tunak, yang diambil antara 14,07 detik hingga 14,08 detik, kondisi pertama menunjukkan percepatan sudut lebih kecil (sekitar 100 rad/s²) dibandingkan dengan kondisi kedua, yang memerlukan percepatan sudut lebih tinggi (sekitar 240 rad/s²). Secara keseluruhan, kondisi dengan tekanan lebih tinggi di inlet dan outlet (kondisi kedua) memerlukan percepatan sudut yang lebih besar dibandingkan dengan kondisi pertama pada waktu yang sama.Kata kunci:  pompa sentrifugal, simulasi, analisis
STUDI NUMERIK KEKUATAN BAHAN PADA STRUKTUR CHASSIS DENGAN BEBAN STATIS DAN DINAMIS Rahmatia; Mawarani, Lizda Johar; Apriandi, Riyki
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.757

Abstract

The growth of microcars as an urban mobility solution demands an efficient yet strong and safe structural design. This study aims to analyze the structural performance of microcar chassis using a Finite Element Method (FEM)-based numerical simulation approach with ANSYS Workbench software. Evaluation was conducted on five types of materials-Aluminum 6061-T6, Aluminum 6082, Steel AISI 1018, Steel S355JR, and Carbon Fiber Reinforced Polymer (CFRP) Prepreg through static and dynamic analysis. Simulation results show that all materials have safety factor values above 1, with CFRP prepreg recording the highest value. Aluminum is considered the most optimal material for mass production because it is lightweight, strong enough, and economical. In the dynamic analysis, the entire structure showed a safe response to random vibration loads due to road surface irregularities, although there was potential for resonance at certain frequencies. Therefore, fatigue analysis is recommended for long-term evaluation. This study makes an important contribution to the design of lightweight, safe and sustainable microcar chassis.
DESIGN OF A 100 KG CAPACITY WORKING LIFT CART FOR SMALL-SCALE INDUSTRIAL APPLICATIONS Apriandi, Riyki; Rahmany, Rijal Surya
ROTOR Vol. 17 No. 2 (2024)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v17i2.53085

Abstract

To accommodate heavy tool movement, forklifts are commonly used. However, a forklift is too large for use in confined workspaces within small industries. Therefore, it is proposed that a 'Working Lift Cart' be designed with a compact size. This research aims to design and develop a compact lift cart that offers flexible movement and reduces operational risks compared to existing forklift products. The method employed in this research involves a direct analysis of two proposed product plan concepts. The proposed concepts are selected based on a needs analysis. The chosen concept undergoes a safety risk analysis from the operator's perspective using the RULA method, while the product design is subjected to static stress analysis on the frame and the lifter. The results indicate that the second concept, with greater operational flexibility, is chosen. The RULA analysis, conducted using CATIA software, indicates that operating with a remote controller is significantly safer and less prone to injury. However, manual operation is retained for usability purposes. The analysis of the frame structure and lifter shows that the proposed design is safe for a 100 kg load on the lifter. Keywords: Working Lift Cart, Design, RULA, Static Stress Analysis
Co-Authors ALDO, JEFRI Aqli Mursadin Hariz Dedy Sayogi, Muhammad Lizda Johar Mawarani Rahmatia Rijal Surya Rahmany