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All Journal Dinasti International Journal of Education Management and Social Science Greenation International Journal of Engineering Science
Komarudin Komarudin
Universitas Dian Nusantara, Jakarta, Indonesia
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Mechanical Engineering

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 1 
Modification Of Measurement Tools On Cmm Machine To Increase The Accuracy Of The Sport Type K64 Production Process Komarudin Komarudin; Aditya Rian Wibowo
Dinasti International Journal of Education Management And Social Science Vol. 6 No. 1 (2024): Dinasti International Journal of Education Management and Social Science (Octob
Publisher : Dinasti Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/dijemss.v6i1.3430

Abstract

New technological innovations in the design and production of motorized vehicles continue to be carried out to maintain product quality and have high-priority safety factors. The tool used by the CMM (Coordinate Measuring Machine) to measure product dimensions must have a very precise level of accuracy. The disadvantage is that it must be measured while still, so it requires tools. The limitation of the problem only focuses on modifying the measuring tools on the CMM machine for the Swing Arm Motor Sport Type K64 product. The aim of this research is to develop measuring tools to achieve tighter dimensional tolerances, increase the accuracy of the production process, and make recommendations for tools to increase measurement accuracy. The method used is a quantitative method. The results obtained show that the simulation and implementation of the K64 swingarm measuring jig show positive and satisfactory results. By modifying the measuring tools on the Coordinate Measuring Machine (CMM), it has succeeded in increasing the accuracy of measuring the K64-type sports motorbike swingarm components. These modifications have a significant impact on improving the accuracy of the swingarm production process in endpiece distance (average deviation percentage 0.05%) and collar distance (average deviation percentage 0.05%), and apart from increasing accuracy, this modification also helps in speeding up the production process and changing the cycle. Time, which was originally 12 minutes, became 8 minutes per unit.
Modeling and Analysis of The Savonius Type L Wind Turbine with Variations in Geometry and Number of Blades on Airflow Using CFD (Computational Fluid Dynamics) Method Komarudin Komarudin; Arif Khasani
Greenation International Journal of Engineering Science Vol. 3 No. 4 (2025): (GIJES) Greenation International Journal of Engineering Science (December 2025
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v3i4.693

Abstract

The use of fossil energy has a negative impact on the preservation nature, wind turbines are one form of renewable energy utilization solutions that are environmentally friendly. This study was conducted to determine the performance of the L-type Savonius vertical axis wind turbine modified with variations in geometry and number of blades against airflow. Based on the simulation results using Ansys 2023 student version, it is known that the smaller the angle of attack of the blade, the greater the potential power , while the increase in the number of blades makes the potential power decrease. Turbines with the number of blades 3 with an angular geometry of 30° have the most optimum performance, namely with a maximum airflow velocity at the tip of the turbine blade of 11.2 m/s, the resulting torque of 2345 Nm with an optimum angular velocity of 46.914 rad/s resulting in a potential power of 110.014 Watt.
Design and Development of a Portable Beverage Cooling System Using a Heatsink and Wind Tunnel Fan Based on the Peltier Effect Muhammad Adinda Hadinur; Komarudin Komarudin
Greenation International Journal of Engineering Science Vol. 3 No. 4 (2025): (GIJES) Greenation International Journal of Engineering Science (December 2025
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v3i4.714

Abstract

Development system cooler portable become important along increasing need cooling practical without use refrigerant and compressor . System cooler based The Peltier effect offers solution friendly environment and size compact , but performance is greatly influenced by ability disposal hot on the side hot module . Research This aim design and build system cooler drink portable based Peltier module with optimization mechanics using a heatsink and wind tunnel fan. Research methods covering design mechanics , manufacturing prototype , as well as testing performance thermal through measurement temperature side hot , side cold , temperature drinks and consumption Power electricity . The test results show that the system is able to achieve a minimum cold side temperature of 12 °C, a cooling chamber temperature of 16 °C, and reduce the beverage temperature by up to 5 °C within a 30-minute test duration. The use of a heatsink combined with a wind tunnel fan has been shown to increase the effectiveness of heat dissipation, thereby maintaining the stability of the Peltier module's performance. This system has the potential to be developed as an alternative small-scale portable cooler with low power consumption.
Energy Efficiency Analysis of a Hydraulic Power Unit (HPU) System on a Winch during Tensile Load Testing Faizin Faiz; Komarudin Komarudin
Greenation International Journal of Engineering Science Vol. 3 No. 4 (2025): (GIJES) Greenation International Journal of Engineering Science (December 2025
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v3i4.722

Abstract

This study aims to analyze the energy efficiency of a Hydraulic Power Unit (HPU) system in driving a winch during tensile load testing. Experiments were conducted on a hydraulic winch with a maximum capacity of 10 tons by applying tensile loads gradually from 2 to 10 tons. The measured parameters include hydraulic pressure, flow rate, pulling force, and rope winding speed. Hydraulic input power and mechanical output power were calculated to evaluate system efficiency. The results indicate that the HPU system is capable of operating the winch stably under all tested load conditions. System efficiency tends to increase from low to medium load levels and then becomes relatively constant or slightly decreases at higher loads due to increasing energy losses caused by mechanical friction, internal leakage, and pressure drops in the hydraulic system. These findings suggest that proper selection of operating parameters and regular maintenance of hydraulic components are essential to improve the overall energy efficiency and reliability of HPU-driven winch systems.
Validation of Plastic Waste Pyrolysis Prototype Design Based on Used Oil Burner with A Simple Condensation System Using Software Moh Risman Nabuah Laiya; Denny Prumanto; Komarudin Komarudin
Greenation International Journal of Engineering Science Vol. 3 No. 4 (2025): (GIJES) Greenation International Journal of Engineering Science (December 2025
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v3i4.729

Abstract

Plastic waste is a serious environmental problem because it is difficult to decompose and its volume continues to increase. One potential solution is pyrolysis technology, a thermal decomposition process at high temperatures in the absence of oxygen that produces oil, gas, and solid residue. This study aims to validate the performance of simulation software in designing a prototype pyrolysis machine using a used oil burner with a simple condensation system through design, simulation, and experimental testing. A three-dimensional model was created using SolidWorks, while temperature distribution analysis was performed using ANSYS. The prototype was designed to process approximately 2 kg of PP and PET plastic at 300–500°C. Parameters analyzed included reactor temperature distribution, condenser temperature drop, and heating and cooling system performance. Both simulation and experimental results demonstrated good performance. The used oil burner produced stable heat, and the condensation system effectively converted steam to oil, demonstrating the prototype's potential for development into an efficient and economical small-scale pyrolysis machine.
Analysis of the Cooling Load of the Air Conditioning System on the 1st Floor of the Dian Nusantara University Building Using the CLTD Method Wa Ode Fanesya Taqwim; Komarudin Komarudin
Greenation International Journal of Engineering Science Vol. 3 No. 4 (2025): (GIJES) Greenation International Journal of Engineering Science (December 2025
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v3i4.730

Abstract

In Indonesia's tropical climate, educational buildings such as Dian Nusantara University face thermal comfort challenges due to high temperatures and intense solar radiation, necessitating accurate cooling load analysis for AC system optimization. This study aims to calculate the total cooling load on the first floor using a descriptive quantitative approach with the ASHRAE-based CLTD method, through measurements of building dimensions, occupants, equipment, and the local climate of Cibubur. The results indicate a total load of 53.88 kW (15.3 TR), dominated by wall envelopes (32.0%), glass (21.1%), and occupants (17.1%), while the installed AC capacity of 70 kW is 30% oversized in aggregate but undercapacity in some rooms. The conclusions emphasize the need to adjust AC capacity per room and the combination of split and cassette AC types for energy efficiency; implications include operational cost savings and improved thermal comfort in tropical buildings.
Design of a Miniature Plastic Waste Pyrolysis Machine Prototype Based on a Used Oil Burner with a Simple Condensation System Komarudin Komarudin; Arief Rachman; Denny Purmanto
Greenation International Journal of Engineering Science Vol. 3 No. 4 (2025): (GIJES) Greenation International Journal of Engineering Science (December 2025
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v3i4.731

Abstract

This study aims to design, realize, and evaluate the performance of a mini-scale plastic waste pyrolysis machine prototype based on a used oil burner with a simple condensation system. The research methods include design, fabrication of main components, system assembly, and thermal performance testing for 60 minutes. Test results show that the reactor reached a maximum temperature of 346°C at 40 minutes and maintained a stable temperature of around 325°C. The spiral condensation system was able to convert pyrolysis vapor into liquid oil. The developed prototype has the potential to be an alternative mini-scale waste-to-energy plastic waste treatment technology that is economical and applicable.
Analysis of the Impact of Cooling Water Inlet Temperature Changes on Energy Consumption of a Water-Cooled Centrifugal Chiller in Hotel Buildings in Bali Komarudin Komarudin; Marysca Shyntia Dewi; Robinhot Limbong; Deni Prumanto; Moh. Ali Sidik; Ari Pangesti Aji
Greenation International Journal of Engineering Science Vol. 4 No. 1 (2026): (GIJES) Greenation International Journal of Engineering Science (March - May 20
Publisher : Greenation Research & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/gijes.v4i1.804

Abstract

Global climate change and the increasing energy demand in the hospitality industry have led to greater attention toward energy efficiency and resource management. In Bali, known as one of the world's most popular tourist destinations, hotel buildings rely on cooling systems to maintain guest comfort. Water-cooled centrifugal chillers are widely used in large buildings, including hotels. This study aims to analyze the effect of variations in cooling water inlet temperature on the performance of a water-cooled centrifugal chiller in a hotel building in Bali. The research object is a Mitsubishi Heavy Industries chiller with a capacity of 250 TR using R134a refrigerant. The method used is an experimental study, focusing only on the chiller unit without considering air conditioning and cooling tower performance. The results show that increasing the cooling water inlet temperature raises condenser pressure and electrical energy consumption. At a cooling load of 72%, maintaining the inlet temperature at 27.48°C (below the maximum specification limit) can save 194.4 kWh of electrical energy per day. However, if the inlet temperature reaches 32.05°C (above specifications), energy consumption increases by 199.2 kWh per day.
Co-Authors Aditya Rian Wibowo Ari Pangesti Aji Arief Rachman Arif Khasani Deni Prumanto Denny Prumanto Denny Purmanto Faizin Faiz Marysca Shyntia Dewi Moh Risman Nabuah Laiya Moh. Ali Sidik Muhammad Adinda Hadinur Robinhot Limbong Wa Ode Fanesya Taqwim