Design of a Hydraulic System for a Glycerin Waste Mixer Machine Using Finite Element Method

Rosalina Amanda (Design and Manufacturing Engineering, Shipbuilding Institute of Polytechnic Surabaya, 6011, Indonesia)
Ahmad Syifa Ubaidillah (Design and Manufacturing Engineering, Shipbuilding Institute of Polytechnic Surabaya, 6011, Indonesia)
Fipka Bisono (Design and Manufacturing Engineering, Shipbuilding Institute of Polytechnic Surabaya, 6011, Indonesia)
Widya Emilia Primaningtyas (Design and Manufacturing Engineering, Shipbuilding Institute of Polytechnic Surabaya, 6011, Indonesia)

Energy: Jurnal Ilmiah Ilmu-ilmu Teknik
Vol. 15 No. 2 (2025): ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK (July-November 2025 Edition)

This study presents the design of a hydraulic-based glycerin waste mixer machine, intended for use in the cement industry as a sustainable alternative to coal. Glycerin waste, a byproduct of biodiesel production, has a calorific value of 25,175.98 kJ/kg, making it a viable substitute fuel. However, its high viscosity and tendency to solidify at low temperatures pose significant challenges for processing. This research addresses these challenges by designing a hydraulic mixer with structural strength verified through Finite Element Method (FEM) analysis. The design follows the Ulrich & Eppinger product design approach, including concept development, technical specifications, and hydraulic system planning. Using Autodesk Fusion 360, the machine's frame, made of ASTM A36 steel, withstood loads with a maximum stress of 87.5 MPa and a safety factor of 2.83, ensuring its structural integrity. The hydraulic system, employing a double-acting cylinder operating at 10 bar, requires a motor power of 4.09 kW and achieves a fluid flow rate of 235.5 L/min. Cost analysis revealed a 30.44% reduction in manufacturing costs compared to similar commercial machines, totaling IDR 16.7 million. These findings demonstrate the efficiency, safety, and economic viability of the mixer, offering a promising solution for glycerin waste utilization in the cement industry.