ABSTRACT The sorting process for oil palm fronds at palm oil mills (PKS) is still largely done manually, which takes a relatively long time about 30 minutes and can lead to inconsistencies in separating fresh and non-fresh fronds. This situation reduces the efficiency of the raw material reception process and affects the quality of crude palm oil (CPO) production. This study aims to design and…
The bolts used to retainer and fasten the shaft of the screw conveyor, which functions to transport wood chips to the cooking process in paper manufacturing, have experienced failure. The failure occurred in the form of a perpendicular fracture on the threaded section of the bolt. This damage significantly disrupts wood processing operations, making it important to investigate the causes. The c…
The global energy crisis and the increasing demand for clean and sustainable energy sources have driven the development of more efficient and intelligent solar energy technologies. One of the main limitations of conventional photovoltaic (PV) panels is their relatively low energy absorption efficiency due to their fixed orientation, which prevents the panel from continuously facing the sun …
ABSTRACT Energy issues, particularly the use of fossil fuels, have become a major concern in the automotive sector, considering that fuel reserves are increasingly depleting while energy demands continue to rise. This condition encourages the development of research and innovation in energy-efficient vehicles, one of which is facilitated through the Energy Efficient Car Contest (KMHE) as a for…
ABSTRACT This study aims to analyze the effect of variations in fuel type and oil mixture ratio on fuel consumption, thrust force, and to determine the optimal combination for achieving the best engine performance in an unmanned surface vehicle powered by a two-stroke engine. The fuel types used in this study are Pertalite, Pertamax, and Pertamax Turbo. The oil mixture ratios tested are 1:30, …
The increasing dependence on fossil fuels and the environmental problems caused by waste oil, which is classified as hazardous and toxic waste (B3), have encouraged the need for innovations in environmentally friendly alternative energy utilization. This final project aims to design, manufacture, and modify a waste-oil- fueled burner integrated with a helical coil system as a fuel preheatin…
ABSTRACT Processing palm oil palm frond waste into craft materials requires a shredding process that produces uniform sizes and smooth surfaces. The manual shredding process has limitations in production capacity, product quality, and operator safety and comfort. This study aims to determine the best design for a palm oil palm frond shredding machine using the Analytical Hierarchy Process (AHP…
ABSTRACT Manual operation of a 5-ton capacity hydraulic press machine is often inefficient and prone to inconsistent results, creating a need for a tool that can operate automatically and precisely. This study aims to develop a 5-ton automatic hydraulic press machine design with the addition of smart control system features, using the Analytical Hierarchy Process (AHP) method as the basis …
ABSTRACT Stroke patients often experience mobility limitations, requiring multidimensional adaptive aids for daily activities and rest. This study aims to determine the best wheelchair bed design for stroke patients using the Analytical Hierarchy Process (AHP) method. The assessment was conducted by experts in mechanical engineering, ergonomics, and medical rehabilitation through a pairwise co…
ABSTRACT A manual forklift is a material handling device used to lift and transport goods. However, a forklift design with a large number of components results in a less efficient assembly process, making design improvement necessary to simplify assembly. This study aims to develop a manual forklift with a mechanical hand winch system using the Design for Assembly (DFA) method. The research me…
ABSTRACT The utilization of photovoltaic (PV) panels faces a significant challenge regarding energy conversion efficiency losses due to rising operational temperatures. This study aims to enhance PV performance by implementing a passive cooling system using a perforated aluminum heatsink and optimizing the gap distance between the PV module and the roof surface. The research was conducted expe…
ABSTRAK Indonesia has significant potential for renewable energy, particularly solar energy, which can be utilized to address the increasing demand for energy and the limitations of non-renewable energy sources. One of the growing applications of solar energy is in the drying of agricultural products, such as cassava, which is highly susceptible to post-harvest deterioration. This study aims t…
ABSTRACT Cassava (Manihot esculenta) is an agricultural commodity that requires a drying process to reduce its moisture content and maintain product quality. Conventional drying methods still have limitations due to their dependence on weather conditions and fluctuations in solar radiation intensity. This study aims to analyze the performance of a cabinet-type solar dryer using stones and with…
ABSTRACT Design and testing of fixed-wing UAV were conducted to optimize U-turn maneuverability. Fixed-wing aircraft capable of high maneuverability greatly assist in accomplishing missions that demand flight reliability. Through the Analytical Hierarchy Process (AHP) method evaluated against five airfoil candidates, the S4110 profile was selected as the optimal design with a final score o…
ABSTRACT The heavy equipment industry in Indonesia continues to grow, with the dozer remaining a key machine in construction and mining. Testing full-scale units, however, is constrained by high costs, safety risks, and measurement complexity in a laboratory setting. This research aims to design, build, and test a 1:10 laboratory-scale dozer blade mechanism driven by pneumatic actuators with w…
RINGKASAN Pembelajaran materi Pertumbuhan dan Perkembangan di SMA memerlukan sumber belajar yang kontekstual untuk membantu murid memahami pengaruh faktor-faktor yang memengaruhi pertumbuhan tanaman. Salah satu faktor yang dapat memengaruhi pertumbuhan tanaman adalah perubahan jumlah kromosom melalui induksi poliploidi menggunakan kolkisin. Kolkisin bekerja dengan menghambat pembentukan benang…
ABSTRACT The increasing ambient temperature and the growing demand for energy-efficient cooling systems have encouraged the development of direct evaporative cooling technology as an environmentally friendly alternative. The performance of this system is highly influenced by the type of cooling pad material used. Although honeycomb cooling pads are widely used due to their good performance…
ABSTRACT A dozer is a crawler-based heavy equipment machine that relies on transmission and undercarriage systems to generate the tractive force required for mobility and operation. In laboratory-scale dozers, limited motor torque presents a challenge in achieving optimal performance. This study aims to design, manufacture, and evaluate a 1:10 scale dozer undercarriage integrated with a tr…
An increase in national energy consumption requires the electrical power system to possess flexible operational response capabilities. This condition forces hydroelectric power plants (PLTA) to operate frequently under off-design conditions. This study aims to analyze the effect of operating load variations on the percentage of Guide Vane Opening (GVO), water discharge rate, and hydraulic effic…
ABSTRACT The use of pump as turbine (PAT) is one of the economical solutions for microhydro power plants, but its performance is still affected by various mechanical and hydraulic losses that can reduce system efficiency. Therefore, this study aims to analyze the effect of variations in the number of blades on the performance and losses of the PAT, as well as to provide experimental data as …