Borobudur Engineering Review <p style="margin: 0mm; margin-bottom: .0001pt;">Journal title :&nbsp;<strong>Borobudur Engineering Review</strong><br>Abbreviation :&nbsp;<strong>BENR</strong><br>ISSN : <a href="">2777-0850</a><br>DOI Prefix : 10.31603/benr by&nbsp;<img src="" width="55" height="15"><br>Frequency : Biannualy<br>Type of peer-review: <strong>Double-blind</strong><br>Editors :&nbsp;See&nbsp;<a href="">Editorial&nbsp;Team</a>&nbsp;</p> Universitas Muhammadiyah Magelang en-US Borobudur Engineering Review 2777-0850 Improved Engine Performance Using Ozone Generator <p><em>An increase in the number of vehicles today will result in an increase in fuel oil consumption and emission pollution. Therefore, it is necessary to optimize for fuel oil economy and emission reduction by improving engine performance. Improving engine performance can be done through several factors, including; with compression ratio, volumetric efficiency and fuel quality. The purpose of this study is to prove that with the addition of ozone (O<sub>3</sub>) the combustion process will be more reactive than oxygen (O<sub>2</sub>) so that it can produce faster and more complete combustion, This study will convert oxygen (O<sub>2</sub>) into more reactive ozone (O<sub>3</sub>) by using a 15 g/h plasma plasma generator ozone installed on an air filter. Engine performance testing includes engine power and torque using a 50L super dyno type dynamometer chassis. The test results showed, with ozone generator engine torque increased from 0 – 0.5 Nm and increased engine power from 0 – 0.4 KW compared to without using an ozone generator. Nevertheless, the use of ozone (O<sub>3</sub>) at a high equivalent ratio can lead to knocking</em></p> Herlang Anantama Erika Achmad Fuad Budi Waluyo Saifudin Saifudin ##submission.copyrightStatement## 2023-07-22 2023-07-22 3 2 17 25 10.31603/benr.9083 Real-Time Monitoring of a PV-Based Solar Power System in a South-Western Nigerian City using LABVIEW <p>Understanding what is obtainable from a PV-based solar power system is key to proper sizing of the system. The parameters that are important are the time range available for energy delivery from the panel, time at maximum charging current and the available charging current. To determine these parameters, this work sets up a complete PV-based solar system that was interfaced with National Instrument myDAQ (NI myDAQ) and LABVIEW program for data collection for a specific period of time.&nbsp; The collection periods were nineteen (19) days which cuts across days in September to November. The data collected are the time stamps, charging current and battery voltage. The study outcome reveals that the average time range for the delivery of energy from the solar module for those periods are 7:24 am to 5:31 pm. The average time at maximum charging current is 12:32 pm. The maximum charging current recorded is 0.509 A, which is 89.3 percent of the panel’s current at maximum power.</p> Muyideen Olalekan Lawal Olakunle Olaniran Babatunde Zaccheus Olaniyi ##submission.copyrightStatement## 2023-07-22 2023-07-22 3 2 1 16 10.31603/benr.8422 Penentuan Nilai Efektivitas Mesin Small Press Line A Melalui Overall Equipment Effectiveness (OEE) di PT. Mekar Armada Jaya <p><em>Small Press Machine Line A in the Stamping &amp; Tools Division of PT. Mekar Armada Jaya produces car and body parts as effectively as possible to increase productivity. However, the performance of the machine and the maintenance system that is carried out is not comprehensive on aspects of the Small Press Machine and takes a long time, causing high machine downtime, this affects the smooth running of the production process. Therefore, measuring effectiveness uses Method the Overall Equipment Effectiveness (OEE), Six Big Losses and Failure Mode Effect Analysis (FMEA). Research results for January 2021 – December 2022, namely the A1 Machine is 82%, the A2 Machine is 76% and the A3 Machine is 58%. The loss factor of the three machines is caused by Equipment Failure Loss (equipment damage loss). The results of the analysis using the FMEA method show that the failures that often occur in the three machines include the engine having an over stroke, the work method is due to the visual check method, and the engine has been repaired by an AIDA technician. So, it is suggested that in order to increase the effectiveness of the Small Press Line A machine, the Stamping &amp; Tools Division should apply FMEA method to look for components or processes that have failed, whether humans, machines, work methods, or materials.</em></p> Tri Sigit Sulistio M. Imron Rosyidi Affan Rifa’i Eko Muh Widodo Retno Rusdjijati ##submission.copyrightStatement## 2023-11-09 2023-11-09 3 2 26 35 10.31603/benr.v3i2.10258 Development of a 1kw Prototype Kerosene-Powered Vapour Absorption Refrigerator for Domestic Refrigeration Applications <p><em>Vapour absorption is an attractive method of utilizing low grade energy directly for cooling. This work attempts to develop a kerosene-powered vapour absorption refrigerator for domestic refrigeration applications. It is designed to comprise five major components: evaporator, absorber, generator, pump and condenser and their capacities were determined to be 80W, 350W, 180W, 20W and 90W respectively.&nbsp; The refrigerator is a medium-size one and is designed for domestic purposes only. It uses ammonia and water as primary and secondary working fluids. Parts were designed, fabricated and assembled accordingly. Finally, the performance test was carried out and the refrigerator was able to achieve an evaporative temperature of 7<sup>o</sup>C and had actual coefficient of performance (COP) of 0.16. It also takes 35 minutes to cool 1litre of water at ambient temperature to 0<sup>o</sup>C. </em>&nbsp;The<em> operating temperature of the refrigerator is between 7<sup>o</sup>C to 43<sup>o</sup>C. General energy equation of the refrigerator </em>gave<em> 875.237KJ. &nbsp;</em></p> <p>&nbsp;</p> Taiwo Semiu Amosun Paul Omoniyi Kaffo ##submission.copyrightStatement## 2023-12-31 2023-12-31 3 2 36 48 10.31603/benr.v3i2.10209 Experimental Research on the Effect of CVT Roller and Spring Parameters on Metic Motorcycle Performance <p><em>The current development of vehicle transmission technology aims to reduce vehicle energy consumption by increasing its performance. Continuously variable transmission (CVT) is an automatic transmission system that is often used in vehicles today. Meanwhile, replacing CVT rollers and springs can affect transmission efficiency, fuel consumption, and overall vehicle performance. So this research aims to explore the impact of replacing roller and spring components on the CVT on engine performance and confirmed by changes in CVT temperature. This research was carried out using a metic motorcycle, by measuring the performance values of the motorcycle in the form of vehicle torque and power using a dynamometer, apart from that the CVT temperature was also measured. The research results show the potential for increasing Torque and Power by using increased roller mass and spring constants. Apart from that, there is an increase in CVT temperature due to the use of an increased spring constant, this shows the potential for wear.</em></p> Bagiyo Condro Purnomo Condro Purnomo Muhammad Farhan Aulia Rahman Wahyu Biantoro Budi Waluyo ##submission.copyrightStatement## 2024-01-18 2024-01-18 3 2 49 65 10.31603/benr.v3i2.10722