Eksergi : Jurnal Teknik Energi
https://jurnal.polines.ac.id/index.php/eksergi
<strong>Eksergi : Jurnal Teknik Energi</strong> firstly was published in 2005 (<a href="http://u.lipi.go.id/1180434391" target="_blank">p-ISSN 0216-8685</a>) by Mechanical Engineering Department, Politeknik Negeri Semarang and frequently published three times a year (January, May and September). Since 2016, Eksergi was published online (<a href="http://u.lipi.go.id/1472021380" target="_blank">e-ISSN </a><a href="http://u.lipi.go.id/1472021380" target="_blank">2528-6889</a>) using Open Journal systems (OJS). Eksergi : Jurnal Teknik Energi has accredited and was categorized as Peringkat 5 (<strong>Sinta 5</strong>) based on Keputusan Direktur Jenderal Penguatan Riset dan Pengembangan, Kementerian Riset, Teknologi, dan Pendidikan Tinggi Republik Indonesia Nomor 30/E/KPT/2019 tentang Hasil Akreditasi Jurnal Ilmiah periode 6 tahun 2019<p><strong>Eksergi : Jurnal Teknik Energi</strong> (<span>DOI 10.32497/eksergi</span>), a peer review journal publishes research articles, conceptual articles, case studies, best practices and policies about <span>energy conversion and power plant engineering</span> (See <strong><a href="/index.php/eksergi/about/editorialPolicies#focusAndScope">Focus and Scope</a></strong>). </p><p><strong>Before submission</strong>, you have to make sure that your paper is prepared using <strong><a href="https://drive.google.com/file/d/1aE64V0nMPHTwxKANyRPQoxx9ROEK7SRv/view?usp=sharing">Eksergi paper Template</a>, </strong>has been carefully proofread and polished and conformed to the<a href="https://joiv.org/index.php/joiv/pages/view/Guide"> </a><a href="/index.php/eksergi/about/submissions#authorGuidelines">author guidelines.</a> Registration and login are required to submit items online and to check the status of current submissions. Please follow <a href="https://drive.google.com/file/d/1EN4tWTqr5-kGXVAU4a-Nvg1VeMPqOCaF/view?usp=sharing">Registration Instructions</a></p><p> </p><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script><script id="stacks-wallet-provider" type="text/javascript" src="chrome-extension://ldinpeekobnhjjdofggfgjlcehhmanlj/inpage.js"></script>Politeknik Negeri Semarangen-USEksergi : Jurnal Teknik Energi0216-8685<span>Authors who publish with this journal agree to the following terms:</span><p>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</p><p>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</p><p>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).</p>Investigation of Double Screw Compressor Characteristic based on Experimental in Industry
https://jurnal.polines.ac.id/index.php/eksergi/article/view/5038
<p><strong>Large-scale compressed air equipment is the only way to meet the demand for air for production facilities such as the pharmaceutical, automotive, or combustion processes industries. As one of the main driving components in the air compressor system, the double screw determines the reliability and performance of the entire compressed air system. </strong><strong>Double</strong><strong> screw compressors are a promising option for use in large-scale compressed air systems due to their high efficiency and reliability.</strong><strong> </strong><strong>The double screw profile has been specially designed to increase compression capability over a period of more than 24 hours with a range of 400 to 385 m<sup>3</sup> per hour. The cooling oil works well keeping the compressor temperature constant at around 100 <sup>0</sup>C, even though there are very active temperature fluctuations. On the working pressure side the compressor as a whole is constant, although there is a significant spike in the dryer pressure. The dryer pressure experienced a significant increase reaching 6.9 Bar in the sixth data collection, while the cooling oil pressure and tank pressure were the same at 6.6 Bar, and the air pressure was 6.3 Bar. The results of observing the performance of compressors during industrial operation have presented the ideal working conditions for double screw compressors reaching 58.4 kJ/kg, while the actual working conditions of compressors are 66.6 kJ/kg. Overall, the average compressor efficiency is 87.81%.</strong></p>Nur Fatowil AuliaMochamad Denny SurindraAhmad Hamim Su’udyNanang ApriandiMuhammad Showi Nailul UlumSlamet Priyoatmojo
Copyright (c) 2023 Eksergi : Jurnal Teknik Energi
2023-11-142023-11-141903767910.32497/eksergi.v19i03.5038Evaluation of 300 WP Solar Photovoltaic Panel Performance for Electric Vehicle Charging Station
https://jurnal.polines.ac.id/index.php/eksergi/article/view/5008
<strong>Conventional transportation methods result in the release of harmful greenhouse gases into the environment. Electric vehicles offer an alternative to mitigate this environmental harm. Electric Vehicle Charging Stations (EVCS) are crucial infrastructure components for supporting electric vehicles. Photovoltaics represents a facet that can be integrated into EVCS to improve eco-friendly power generation. Various factors, including temperature, humidity, and light intensity, influence electricity generation in photovoltaic (PV) systems. This research examines the consequences of temperature, humidity, and light intensity fluctuations within EVCS. During the system integration testing conducted between 09:00 and 16:00, it was noted that there is an inverse relationship between air humidity and temperature; when air humidity increases, temperature decreases, and vice versa. The solar panel exhibits its highest sunlight intensity reception between 09:30 and 15:30. The peak power output from the solar panel was registered at 13:00, with an air temperature of 40.40°C, air humidity at 35%, and light intensity at 54.61 Cd, resulting in a solar panel power output of 146.1 Watts. Conversely, the lowest power output from the solar panel was observed at 16:00, with an air temperature of 31.80°C, air humidity at 54%, and light intensity at 39.39 Cd, leading to a solar panel power output of 107.36 Watts. Anticipated findings from these analyses are expected to contribute to future technological advancements, enabling the creation of competitive products in the market.</strong>Brainvendra Widi Dionova
Copyright (c) 2023 Eksergi : Jurnal Teknik Energi
2023-11-142023-11-141903808410.32497/eksergi.v19i03.5008The Effect of Solar Panel Efficiency Due to Temperature Changes Using Halogen Lamps on Polycrystalline Type Solar Modules
https://jurnal.polines.ac.id/index.php/eksergi/article/view/4571
Solar panels are a technology that utilizes solar energy to be converted into electrical energy. Solar panel technology can be used to generate electricity on a small scale to a large scale. The performance of solar panels depends on environmental factors, namely solar radiation, and temperature. Environmental factors will reduce the electrical efficiency of solar panels due to the increase in operating temperature of solar panels, the greater the temperature will affect their efficiency. Based on tests conducted on photovoltaic (PV) using halogen with different power, the greater the power value in halogen lamp light, the smaller the efficiency, while the greater the temperature of the solar module, the smaller the efficiency. The greater the increase in temperature, the PV efficiency tends to decrease. Based on the results of the study, it shows a significant correlation that, between PV surface temperature and PV efficiency is inversely proportional. While the effect of temperature on efficiency can be said to be quite influential, where in testing with a 300-watt halogen lamp the error rate or R value is 0.6339, while the 500-watt halogen R value is 0.8493 which means it is more accurate and the effect is quite strong.Samsurizal SamsurizalAndi MakkulauMiftahul FikriRio Afrianda
Copyright (c) 2023 Eksergi
2023-11-142023-11-141903859010.32497/eksergi.v19i03.4571Effectiveness of Brackish Water Desalination Using Reverse Osmosis System for Industrial Water Treatment at PLTU PT Bintan Alumina Indonesia
https://jurnal.polines.ac.id/index.php/eksergi/article/view/4717
<p><strong><em>Abstract- </em></strong><strong><em>Demineralized water is water that does not contain high minerals or chemicals, and is used as feed to the boiler to produce steam. Demineralized water is very important in the PLTU (Steam Power Plant) industry because steam is produced through the process of changing the phase of water to steam. Natural water tends to be corrosive because it contains minerals such as high calcium and magnesium, which can cause scale in the boiler and reduce energy efficiency. Therefore, these minerals must be removed from the water so that they can be used as boiler feed. To produce demin water, PT. BAI uses a Water Treatment Plant (WTP) system which consists of several stages, such as a clarifier, a three-layer filter, an automatic cleaning filter, ultra-filtration and reverse osmosis. After going through these processes, demin water is stored in tanks and then flowed to the main plant. There are several factors that can interfere with the demin water production process at PT. BAI, including changes in water quality, problems with WTP equipment, and disturbances in the water distribution system. This study aims to maintain the reliability and efficiency of the demin water production process, by carrying out routine maintenance on equipment, monitoring water quality by checking conductivity, pH levels, and produced water. Then from the data obtained it can be seen that the efficiency of demin water has met the operating standards and procedures set by PT.BAI, namely desalination levels above 90%. The division must also always be ready to deal with problems that occur and take preventive actions to prevent disruption to the production process.</em></strong></p><p> </p>Yosia Putra Simanjuntak
Copyright (c) 2023 Eksergi : Jurnal Teknik Energi
2023-11-142023-11-141903919410.32497/eksergi.v19i03.4717Designing SMART-PJU Based on LoraWAN for Rural Light System
https://jurnal.polines.ac.id/index.php/eksergi/article/view/4975
In the industrial era 4.0, every industrial tool or equipment and building already uses automation via IoT, especially in public street lighting. Using a SMART-PJU-based LoraWAN system can minimize electrical energy use by using dimmer schedule control and ON/OFF schedule control. Using a dimmer schedule for PJU lights, the energy is set maximum of 10 amperes depending on the dimmer module used. The SMART-PJU has a LoRa module to control and monitor them via a wireless network. This research used the LoRa-EBYTE E32-DTU(915L20) module as the data sender and receiver. LoRa-EBYTE E32-DTU(915L20) with a frequency of 915 MHz to 931 MHz and an RS232/RS485 connector. The furthest distance that can be reached during testing at the Jakarta Global University campus, with a frequency of 922 MHz, is 450 meters, 344 meters, and 215 meters at three different points. The SMART-PJU system can regulate light, ON/OFF control, and ON/OFF schedule and can see the on or off status of the digital output on the Arduino. To ensure the module is on or off. Furthermore, it can monitor electricity usage in the PJU, such as power, voltage, current, power factor, and frequency, via the PZEM-016 sensor. The comparison value using the dimmer schedule at 12 hours is 375.62 Wh without the dimmer, 1085.04 Wh, and the average comparison error value of the PZEM-016 sensor reading with a multimeter is 0.1 current, 0.009 voltage, 0.3 power at each dimmer setting from 20 to 80. All data are obtained and viewed using Node-red software. By using Node-red software, users can control and monitor easily because Node-red uses language and displays that are easy for users to understand.Legenda Prameswono Pratama
Copyright (c) 2023 Eksergi : Jurnal Teknik Energi
2023-11-142023-11-141903949810.32497/eksergi.v19i03.4975Performance of Photovoltaic as Pump Drive for Alternator Characteristic Monitoring System
https://jurnal.polines.ac.id/index.php/eksergi/article/view/5068
<p><strong>The objectives of this research to generate electrical energy by making photovoltaic which utilizes the potential of solar radiation sources to drive the pump. There are 2 monocrystalline solar panels installed with a capacity of 100 Wp. Installation of solar panels at an angle of 7° based on geographic location in the Tambakboyo, Ambarawa, -7.263239"(Latitude) South Latitude and 110°42'06.82 (Longitude) East Longitude. The test is carried out by turning on the pump for 1 hour within a period of time until 7 days. The parameters measured in the test are solar radiation data (W/m²), voltage (V) and current (A) input from solar panels, battery input voltage, voltage and current input from the inverter, as well as the output voltage and current from the inverter. The results of test obtained the highest efficiency value of 12.854% at a voltage of 12.58 V and a current of 10.4 A.</strong></p>Yusuf Dewantoro Herlambang
Copyright (c) 2023 Eksergi : Jurnal Teknik Energi
2023-11-142023-11-1419039910210.32497/eksergi.v19i03.5068