JTT (Jurnal Teknologi Terapan)
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PENGARUH VARIASI PEREKAT TERHADAP KARAKTERISTIK BAHAN BAKAR BRIKET CANGKANG KELAPA SAWIT
Full text linkThis study explores the utilization of Renewable Energy Sources (RES) through the production of biomass briquettes using palm kernel shells as a sustainable energy source. The raw materials include palm kernel shells as the main component, along with tapioca flour, sago flour, and molasses as binders. The production process involves molding under a pressure of 50 kg/cm² and drying at 100°C for 3 hours. Experiments were conducted with variations in the proportions of the main material and binders, resulting in an optimal composition of 75% palm kernel shells and 25% binder. Test results indicate that briquettes with tapioca flour as a binder exhibit the best characteristics, with a moisture content of 3.74%, a calorific value of 5,405.67 cal/g, ash content of 5.77%, fixed carbon of 56.42%, volatile matter of 44.63%, and a burning rate of 0.1939 g/min. This study validates that the developed briquette formulation meets the SNI 01-6235-2000 standard, demonstrating its potential as a sustainable alternative energy source
ANALISIS TEGANGAN DAN FLEKSIBILITAS PIPA PADA AREA RUANG POMPA HIDRAN POLITEKNIK PERKAPALAN NEGERI SURABAYA DENGAN MENGGUNAKAN METODE ELEMEN HINGGA
Full text linkHydrant is a fire fighting system. In the process of distributing water in the hydrant fire extinguishing system using piping. The hydrant piping system is a very important piping line in fire prevention, so it must function properly without any problems. The hydrant piping system in this paper is a case of the yard hydrant piping system at the Politeknik Perkapalan Negeri Surabaya. The results of visual inspection on the hydrant piping show that the line pipe is damaged. The line pipe is located in the pump room area. According to DNV D101 that the piping system is a critical line. In this research, an analysis of the stress and flexibility of the pipe in the pump room area will be carried out. Piping around the pump to be analyzed from line numbers 01-101-A53-4” and 01-101-A53-3” to line numbers 02-101-A53-6”. The purpose of this research is to determine whether the line pipe around the hydrant pump is damaged due to stress and flexibility aspects. From the modeling and simulation results, it shows that from the aspect of stress that occurs in the pipe it still meets ASME B31.3 criteria, but from the aspect of flexibility it shows that the pipe is damaged due to displacement and rotation on line 01-102-A53-2"
ANALISIS KEGAGALAN POROS ROLL PADA MESIN PELET KAYU DENGAN METODE REDESIGN IMRC
Full text linkThe wood pellet machine is one of the Special Purpose Machines (SPM) that has an important element as a driver. One of the damaged machine elements is the broken roll shaft due to long-term use. The roll shaft functions to hold the roll so that it does not rotate during the wood pelletizing process. Failure analysis was carried out on the roll shaft, starting with a redesign using the IMRC method. The stages of this method are incremental, elemental, and radical stages. The redesign strategy chosen was an incremental redesign. This redesign changes the core component but does not change the mechanism or function. The results obtained after the redesign, obtained changes in the dimensions of the roll shaft so that it does not break with a value above the permitted control value. The largest shaft diameter becomes 70 mm, the diameter at the critical part becomes 60 mm and the length of the spline construction becomes 50 mm. With this change in diameter, a safety factor for the shaft was obtained after the redesign with a value of 6.83 and is categorized as safe
IMPLEMENTASI METODE QUALITY CONTROL CYCLE (QCC) UNTUK PENINGKATAN KAPASITAS PRODUKSI BODY CENTER PILLAR DI PERUSAHAAN OTOMOTIF
Full text linkThis research was conducted at manufacturer of Toyota and Daihatsu brand cars. One of the products, the Body Center Pillar part, is the lowest productivity, where the target PPH is 50 pcs / hour, the actual PPH is 40 pcs / hour or still minus 10 pcs every hour. Necessary non valuable work that causes a high cycle time of 90 seconds, thus affecting production capacity. This study aims to determine the factors that cause Non-Valuable Work which results in a high Cycle Time of 90 seconds, which has an impact on low production capacity in line 6D-01-1 using the Quality Control Cycle (QCC) method. The subject of the study is the work process carried out by production operators where the productivity results are still low while the object of research is the measurement of process time or Cycle Time Part Body Center pillar consisting of 4M and 1E factors, namely: Machines, Materials, Methods, People, and Environment. After making some improvements of the engine factors and methods, use the Quality Control Cycle (QCC) method. Cycle Time decreased to 72 seconds so that PPH increased from 40 pcs to 50 pcs and production productivity in line 6D-01-1 increased
Analisis Recency Frequency Monetary Pada Pelanggan Batik Sida Muliya Berbasis Sistem Informasi Bisnis Menggunakan Algoritma K-Means
No full textBatik Sida Muliya is one of 1,077 Micro, Small, and Medium Enterprises (MSMEs) involved in the batik industry in Pekalongan City. The execution of business processes is conducted by documenting in sales ledgers and notebooks. The process of manual recording results in Batik Sida Muliya lacking regular and consistent sales data. This situation presents a difficulty in assessing the business processes being executed. One approach to address this issue is to perform Recency, Frequency, and Monetary (RFM) Analysis on customers of Batik Sida Muliya by applying the K-Means algorithm, which will be executed using the Business Information System (BIS). The aim of this study is to develop a BIS website for Batik Sida Muliya to assist in dividing customers into segments. The approach utilized to create the system is the Cross Industry Standard Process for Data Mining (CRIS-DM), which comprises six steps: Business Understanding, Data Understanding, Data Preparation, Modeling, Evaluation, and Deployment. According to the findings from the system testing, it is capable of delivering customer mapping analysis that includes three categories: Potential Customers, Quite Potential Customers, and Non-Potential Customers. The evaluation of the K-Means centroid employs the calculation of the Davies-Bouldin Index (DBI), yielding a result of 0. 073021621. This value signifies a good centroid since it is near zero (0)
Analisis Perawatan Mesin Genset Pada Kapal KM BINAMA 11
No full textThe demand for electricity on board ships is crucial to support operations, yet often lacks proper and consistent maintenance practices. This study aims to analyze the periodic maintenance methods and repair procedures of the generator set (genset), particularly focusing on the Auxiliary Engine and Alternator used on the KM Binama 11 vessel, owned by PT. Dwi Bina Utama. A case study method was applied through direct observation and interviews with the ship's crew. The results show that periodic maintenance includes routine inspections, cleaning, lubrication, and replacement of spare parts, scheduled on a daily, weekly, monthly, and annual basis. Repair activities addressed issues such as exhaust pipe leakage, unstable engine RPM, and faulty AVR units. This analysis is expected to serve as a reference for improving the reliability of electrical systems on fishing vessels
Simulasi Respon Transien Pemodelan Gerak Rotasi Silinder Pada Mesin Cetak Offset
No full textLarge scale demand in folding cardboard packaging encourages the use of offset printing machines as the main preference because of efficiency in mass production. However, during the printing process, vibration comes in a process due to rotational motion and contact between three cylinders, plate cylinder, blanket cylinder and impression cylinder which can affect the quality of the printed results. This study aims to model the rotational dynamics of three cylinders and analyze the transient response of the rotation system of three cylinders. The method used is mathematical modelling with ordinary differential equation and input-output relationship by using transfer function then transient response simulation is carried out on each cylinder separately. The simulation results of three cylinders on damping variation, the three cylinders systems can reach a steady state but only differ in settling time while the variation is only at a value of 1x106 Nm-1 for plate cylinder system and impression cylinder which can reach the desired value and reach can be used as a reference in the field of offset printing machine maintenance so as not to reduce the quality of print results
Robot Lunak dalam Industri 4.0: Tinjauan Literatur dan Potensi Implementasi di Indonesia
No full textSoft robotics has emerged as a promising solution to address automation challenges across various industrial sectors, particularly in developing countries such as Indonesia. Unlike conventional robots with rigid structures, soft robots are designed using elastic materials that allow them to adapt to unstructured environments and interact more safely with humans. This study was motivated by the significant increase in global research on soft robotics over the past decade, as identified through a bibliometric analysis of 18,329 scientific articles indexed in Scopus from 2010 to 2024. This literature review employs a bibliometric approach to map research trends, dominant keywords, and global thematic focuses in the development of soft robotics. The analysis reveals that the most prominent application areas include precision manufacturing, sensor-based agriculture, rehabilitative medical services, and logistics involving delicate materials. Although the technology has advanced rapidly at a global level, its implementation in Indonesia remains limited due to challenges such as inadequate research infrastructure, a lack of multidisciplinary human resources, and high initial integration costs. Accordingly, this study provides strategic recommendations to strengthen the research ecosystem, promote interdisciplinary education, and develop supportive policies and fiscal incentives, especially for SMEs and labor-intensive industries.
STUDI NUMERIK KINERJA HEAT SINK BERBASIS ALIRAN DUA FASE DENGAN ETIL ASETAT SEBAGAI ALTERNATIF PENDINGIN CONCENTRATED PHOTOVOLTAICS
Full text linkConcentrated Photovoltaic (CPV) technology offers the potential to enhance solar energy conversion by utilizing light focusing technology to increase the solar irradiation flux received by photovoltaic cells. On the other hand, as the solar energy density increases on a PV cell, the surface temperature of the PV also rises, which results in decreased energy conversion efficiency and the possibility of thermal fatigue. Therefore, a reliable cooling system is required for CPV. This study aims to evaluate the performance of a two-phase flow heat sink with ethyl acetate (C4H8O2) as the working fluid, which has a low boiling point and high heat of vaporization, making it quite effective for heat transfer. The method used is numerical simulation using Computational Fluid Dynamics (CFD) software. The simulation results show that the heat sink heat transfer effectiveness is 86.03%, with a thermal resistance value of 0.0073 . The highest temperature on the solid part is 105 showing an increasing trend but not significantly, while the average fluid temperature tends to remain constant at 55 . This indicates that the evaporation process is able to maintain the heatsink temperature at stable level
RANCANG BANGUN POMPA HIDRAM UNTUK MENGATASI KETERBATASAN SUMBER ENERGI LISTRIK
Full text linkPuteran Village, Cikalong Wetan District, West Bandung Regency is the one that needs a hydram pump to utilize the spring water in Puteran Village to meet daily needs. This hydram pump is a pump that utilizes the power of water flowing from a source and some of the water is pumped to a higher place. This pump does not use electrical energy, so it can be used in areas where electricity is difficult or limited. This research includes design and assembly, this pump uses PVC pipe measuring ½", 2", 3" and 4". Tests were carried out by varying the diameter and length of the hydram pump tube. Water flows from the spring to the hydram pump at a distance of 6 meters with a height of 1 meter, while the distance from the pump to the water reservoir is 60 meters with a height of 2 meters. The total cost of making a hydram pump is Rp. 822,000,- and the largest variation in the 4" diameter air tube with a height of 1 meter produces a water discharge of 0.0000668 m3/s with a D' Aubuisson hydram pump efficiency of 82.59% and a Rankine hydram pump efficiency of 63.85%