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Design of Low Subsonic Wind Tunnel with Open Return System for Testing Wind Turbines at Low Airspeeds Yanel, Karnova; Yanto, Asmara
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 17, No 2 (2023): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.17.2.82-96

The The Republic of Indonesia is rich in potential for renewable energy, including abundant wind energy. This study aims to design a subsonic open return wind tunnel for testing wind turbines at low airspeeds. The testing focus includes the evaluation of blade efficiency, bearing performance, and other aspects. Testing at low airspeeds (<5 m/s) is highly relevant to the wind conditions in Indonesia. The design process utilizes Computer Aided Design (CAD), while data collection and analysis are conducted through Computer Aided Engineering (CAE) simulations and theoretical calculations. The wind tunnel comprises components such as contraction, honeycomb, test section, diffuser, and support structure. Airflow over the turbine blades can be observed using smoke visualization in the test section. This research is expected to provide practical contributions to the development of low-speed wind turbines in Indonesia.

Analysis of the Performance of Moisture Reduction Rate in a Horizontal Mill Type Coffee Dryer Using a Suction Blower Yanel, Karnova; Hendra, Surya; Saferi, Rozi; Sulaiman, Sulaiman
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 18 No. 1 (2024): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.18.1.38-43

Coffee, originating in the 9th century Ethiopia and later expanding across North Africa and tropical regions globally, remains a crucial commodity. Indonesia, recognized for its robust coffee industry, ranks third worldwide in production, contributing 8% of the global supply. However, the drying process poses challenges to Indonesian farmers due to traditional methods and variable weather conditions. This research aims to evaluate a coffee dryer utilizing forced convection with a suction blower to optimize drying parameters for coffee beans. The study employs a horizontal mill dryer with a heated drum for drying experiments. Results demonstrate that the dryer effectively reduces the moisture content of post-harvest coffee cherries to 2%. In the initial test, 20 kg of coffee dried over 7.5 hours at 75℃ decreased from 61.66% to 5.3% moisture, while a subsequent test with 17 kg dried over 4 hours reduced from 36% to 2% moisture content. The findings conclude that the suction blower-equipped dryer meets Indonesian National Standards (SNI), achieving the requisite 12% moisture content for post-harvest coffee.

CONSTRUCTION OF A GOODS ELEVATOR WITH A MANUAL PULLEY SYSTEM Yanel, Karnova
Jurnal Teknologi dan Vokasi Vol 3 No 1 (2025): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2025.3.1.42-48

An elevator, commonly referred to as a lift, is a lifting device frequently used in multi-story buildings to transport people or goods. In the context of this design, the objective is to develop an elevator for a two-story building with a height of 4 meters. The background of this project is to provide a practical and efficient elevator system for buildings that do not require high-capacity or complex machinery. The purpose of this design is to create an affordable and reliable manual pulley-based elevator system suitable for low-rise buildings. The methodology includes observation of existing elevator systems, the application of established design standards, and a thorough literature review. Based on these inputs, the elevator utilizes a manual pulley system with a maximum load capacity of 540 kg. The cabin, which accommodates four people, is lifted using six ropes of type 8x19 with a diameter of 13 mm. The cabin is guided by T90 rails and is equipped with a wedge-type safety gear system for enhanced security. The results of the design show that the system meets the required specifications for load capacity and safety, while remaining cost-effective and efficient for the intended application. In conclusion, this manual pulley elevator system is a feasible and practical solution for small to medium-sized buildings, offering both reliability and safety within a modest budget

CONSTRUCTION OF A GOODS ELEVATOR WITH A MANUAL PULLEY SYSTEM Yanel, Karnova
Jurnal Teknologi dan Vokasi Vol 3 No 1 (2025): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2025.3.1.42-48

An elevator, commonly referred to as a lift, is a lifting device frequently used in multi-story buildings to transport people or goods. In the context of this design, the objective is to develop an elevator for a two-story building with a height of 4 meters. The background of this project is to provide a practical and efficient elevator system for buildings that do not require high-capacity or complex machinery. The purpose of this design is to create an affordable and reliable manual pulley-based elevator system suitable for low-rise buildings. The methodology includes observation of existing elevator systems, the application of established design standards, and a thorough literature review. Based on these inputs, the elevator utilizes a manual pulley system with a maximum load capacity of 540 kg. The cabin, which accommodates four people, is lifted using six ropes of type 8x19 with a diameter of 13 mm. The cabin is guided by T90 rails and is equipped with a wedge-type safety gear system for enhanced security. The results of the design show that the system meets the required specifications for load capacity and safety, while remaining cost-effective and efficient for the intended application. In conclusion, this manual pulley elevator system is a feasible and practical solution for small to medium-sized buildings, offering both reliability and safety within a modest budget

PROTOTYPE OF ARDUINO-BASED WATER LEVEL DETECTOR WITH ULTRASONIC SENSOR Yanel, Karnova
Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer Vol. 3 No. 1 (2023): Maret: Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/juritek.v3i1.1329

Most of the water can be found in the sea (salt water) and in the ice caps (at the poles and on the tops of mountains). Apart from that, water can also be found in clouds, rain, rivers, surface fresh water, lakes, water vapor, and sea ice. The water in these objects moves according to a water cycle, namely: through evaporation, rain, and the flow of water over the ground surface (runoff, including springs, rivers, estuaries) towards the sea. Floods are natural disaster events that occur when an excessive flow of water submerges land. Floods can occur within minutes or over a long period of time, and can last days, weeks, or longer. Floods are the most common and widespread of all weather-related natural disasters. The tool can function properly. The height can be set to be displayed with an LED light display. Can be applied to the floodgates to activate the motor driving the floodgates so that the water level through the floodgates can be adjusted in such a way.

PROTOTYPE SOLAR TRACKER BERBASIS ARDUINO Yanel, Karnova; Rozi Saferi
Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer Vol. 3 No. 2 (2023): Juli: Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/juritek.v3i2.1897

Solar radiation is the light – also known as electromagnetic radiation – that is emitted by the sun. The enormous amount of energy generated from sunlight makes solar cells a very promising alternative energy source for the future. Solar cells also have the advantage of being a practical energy source considering they do not require transmission because they can be installed in a modular manner at any location where they are needed. Various technologies have been developed in the process of making solar cells to reduce production costs to make them more economical. The aim of this research has been achieved, namely to design an Arduino-based solar tracking system, so that by using a solar tracker solar energy can be absorbed and produced more optimally than without using a solar tracker. This is proven based on the results of the Black box test. As for the results of testing the system in a black box, the result is that solar panels can move to follow the sunlight and produce maximum energy. So that this tool can be applied to all regions and can assist the government in efforts to overcome energy problems, especially optimizing alternative energy.

ANALISIS KEGAGALAN POMPA SENTRIFUGAL (OVERHUNG 212–P17) MENGGUNAKAN METODE FMEA DI PT KILANG PERTAMINA INTERNASIONAL RU II DUMAI Safery, Rozi; Putra, Ismet Eka; Yanel, Karnova
Jurnal Teknologi dan Vokasi Vol 3 No 2 (2025): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2025.3.2.173-178

Centrifugal pumps are essential components in refinery processing systems, including those at PT Kilang Pertamina Internasional RU II Dumai. One of the pumps in operation, the overhung type 212–P17, has experienced a jammed condition affecting its performance. This study aims to analyze the potential failure modes of the pump components using the Failure Mode and Effect Analysis (FMEA) method and to determine corrective action priorities based on the Risk Priority Number (RPN). The analysis focused on four key factors: material integrity, shaft alignment, lubrication condition, and clearance. The results indicate that shaft misalignment had the highest RPN of 324, followed by lubrication failure with an RPN of 160. These findings suggest that corrective measures should prioritize shaft realignment and lubrication management. The FMEA approach has proven effective in identifying critical components and structuring a preventive maintenance strategy to enhance the operational reliability of the pump system.

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