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Infotekmesin
Published by Politeknik Negeri Cilacap
ISSN : INFOTEKMES     EISSN : 26859858     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering
INFOTEKMESIN is a peer-reviewed open-access journal with e-ISSN 2685-9858 and p-ISSN: 2087-1627 published by Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Cilacap. The journal invites scientists and engineers to exchange and disseminate theoretical and practice-oriented in the various topics include, but not limited to Informatics, electrical Engineering, and mechanical Engineering.
Arjuna Subject : -
Articles 669 Documents
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Optimalisasi Kapasitas Rooftop PV System Skala Rumah Tangga di Perumahan Prima Dewi, Riyani; Hazrina, Fadhillah; Widianingsih, Betti
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.937

Abstract

One of the renewable energies in Indonesia is solar energy. The geographical condition of Indonesia, which is a tropical country, is one of the advantages it has for applying solar energy. The Indonesian government is gradually regulating the population system for Solar Power Plants (PLTS). The resident system is in demand because of the advantage that it can be connected to the PLN grid and used as an energy reserve. The installation of rooftop PLTS both in government buildings and on the roofs of houses has now become a common trend in the community as a form of participation in the use of New and Renewable Energy (EBT). Before installing PLTS Roofs, it is necessary to determine in advance how much capacity will be installed. This is also related to the community's question, what is the percentage of electricity costs if PLTS roofs are installed in bulk. These designs and calculations are generally carried out with the help of simulations. To discuss these problems, in this article, we will discuss a simulation of the potential for electrical energy generated from rooftop solar power plants in Cilacap Green Smart Living housing. The simulation was carried out with the help of the SolarGIS PV lunar device. Analytical calculations are carried out by software based on input of regional location and solar irradiation. SolarGis will calculate the daily output power generated by the rooftop PV mini-grid and the average monthly and yearly power. The simulation results show that one house with a daily energy requirement of 13 kWh by installing a rooftop PLTS with a capacity of 3 kWp, the demand for electrical energy imported from the PLN network to the house is only 7.8% in one year.
Komparasi Model Prediksi Kurs Pada Masa Pandemi Covid-19 Menggunakan Neural Network Berbasis Genetic Algorithm dan Particle Swarm Optimization Nur Ikhsan, Ali; Arsi, Primandani; Suhaman, Jali
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.938

Abstract

Data from Bank Indonesia shows that the rupiah exchange rate against dollar weakened at the beginning of the Covid-19 pandemic. This exchange rate volatility is an important problem in the Indonesian economy. Therefore, the prediction model for the exchange rate against the dollar is needed during the Covid-19 pandemic to predict the exchange rate during the Covid-19 Pandemic. This study is proposed to compare the prediction of the rupiah exchange rate against the dollar using the GA-based Neural Network algorithm and the PSO-based Neural Network algorithm. Initially the data was collected in the period 2019 to 2021, then the data is preprocessed. Validation used the k-fold validation technique with a ratio of 70:30, while the evaluation is carried out with the output of RMSE. The results showed that the performance of PSO and GA was the same, namely 0.020 +/- 0.006.
Analisis Teknik Serta Kelayakan Ekonomi Pada Perancangan Pembangkit Listrik Tenaga Surya Sistem Hybrid Denis, Denis; Windarta, Jaka; Winardi, Bambang; Arifan Nurdani, Imam
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.962

Abstract

National electrical energy needs are increasing every year. This is accompanied by an increasingly massive use of fossil energy as a power plant. The government is targeting a share of new and renewable energy (EBT) of at least 23% by 2025. As a tropical country, Indonesia has a large potential for new and renewable energy, which mostly consists of solar energy with an average daily radiation of 4.8 kWh/m2/day. The design of a solar power plant (PLTS) at SMA Negeri 3 Surakarta is an effort to utilize NRE and can be used as a model for environmentally friendly schools for similar public institutions and the general public. This PLTS uses a hybrid system with a generating capacity of 1230 Wp, SCC 60A, 24 V 200 Ah battery and a 2400 W hybrid inverter. Using analysis methods with PVSyst and RetScreen simulations, this PLTS generates electricity of 1,653.2 kWh/year. With an initial investment of IDR 25,186,000, the net present value is IDR 1,210,272 and the payback period is 24 years.
The Impact of Utilization The Solar-Panels With a Cooling-Water System as a Source of Micro-Power Generation Setyono, Gatot; Kholili, Navik; Rakhmadanu, Yanuariza
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1001

Abstract

The optimal approach to enhance solar panel efficiency and decrease the degradation rate is to lower the temperature range of the surface area. It will be applied by allowing the panels/modules to be cooled and lessening the heat stored in the solar cells through an operation. In the research using experimental methods, the solar panels used have a capacity of 100 WP as a source of micro-power generation, the angle of inclination of the panels is adjusted with variations of 150, 200, and 250. The cooling system uses water, the process of draining water using a submersible pump mounted on a reservoir Water flows to all surfaces of the solar panel and circulates continuously when operating. The experimental outcomes show that the cooling process utilizing water has reduced the temperature operating of the solar panels. The decrease in average temperature occurred in all variations of 23%. The cooling process significantly affects the output power and operational efficiency; circulating cooling can increase the scale of incidents solar radiation on the solar panel due to the refractive effect of the water layer and keep the surface of the solar panel clean from dirt and dust. Output power and operational efficiency have increased in almost all variations in the angle of the solar panel tilt (150, 200, and 250), output power has increased by an average of 22%, and efficiency has increased by on average of 2%
Perancangan Mesin Cetak Biopellet Sekam Padi Dengan Menggunakan Software Solidwork 2016 Nugraha Gusniar, Iwan; Gumelar, Dicky; Nugraha, Billy
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1005

Abstract

Indonesia's consumption of energy increases significantly each year. While the reserves of energy are declining every year, alternative energy is needed. The waste treatment of rice husk biomass has been used for alternative energy, so the research aims to optimize the waste into fuel. The research site was conducted in Kelapa Dua Village, Jaya Subdistrict, Karawang Regency. To get the results of the design, there needs to be technological engineering to design production machines with the help of solidworks 2016 software. The research resulted in the form of compounding tools, as follow: Screw press diameter (Ds = 200 mm), screw height (hs = 65 mm), screw shaft diameter (dps = 70 mm), screw lift length (L = 420 mm), nominal screw diameter (Dn = 177.8 mm), screw lift width (Fd Max = 14 mm), screw spacing (pitch) (P = 60 mm), screw number (n = 7 threads), helix angle (β = 8), screw press power requirement (Pe = 119.27 watts), torque (T = 326.1 N.m), screw lift load (Ws = 141.5 N) and pressure developed on screw thread (PS = 1.65 N/mm2).
Komparasi Kinerja ELECTRE dan MOORA dalam Menentukan Konsentrasi Tingkat Kesuburan Sperma Irmansyah Lubis, Ahmadi; Setiawan, Feri; Lusiyanti
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1012

Abstract

The aim of this research is to test and compare the performance of the ELECTRE method with MOORA in decision making. By using the attribute weighting process, namely the calculation of Information Gain in both methods, the attribute weights are obtained systematically and objectively, therefore they are no longer determined by the assumptions of decision makers. The test data instrument used is a dataset from the UCI Machine Learning Repository, namely the Fertility Dataset which is data on the level of sperm fertility concentration with 100 data records, 9 attributes, 1 class variable and the data set is multivariate. The results of testing the ELECTRE and MOORA methods in this study indicate that the two methods have differences in the results of ranking the best alternative for sperm fertility concentration levels. The ELECTRE method produces A2 as the best alternative, while the MOORA method produces A16 as the best alternative. Then in terms of program execution time, the MOORA method is faster, namely 0.02 seconds, while the ELECTRE method execution time is 1.88 seconds.
Efek Temperatur Pengarangan Cangkang Kerang dan Tulang Sapi Terhadap Proximate Nurhilal, Mohammad; Dwityaningsih, Rosita; Purwanti Sri Rahayu , Theresia Evila; Ariawan, Radhi
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1018

Abstract

Studies on the use of animal waste as charcoal ingredient in the needs of activated charcoal material has been carried out and developed. Activated charcoal is produced through activation process at a certain temperature, condition, and time in order to creat a higher carbon content in charcoal . One of the important factors in the manufacture of activated charcoal is the temperature during the production process. The purpose of this study is to discuss the influence of temperature factor of mussel shells and beef bones on water content, ash content, volatile matter and fixed carbon during the charcoal production process. The research is carried out through experimental method of making chorcoal with temperature variations of 400, 500, 600, 700, and 800 oC. The result of the experiment shows the highest ash content and water content found respectively in beef bone charcoal of 800 oC which is 98,697 %, and of 400 oC which is 4,942 %, while the highest volatile matter and fixed carbon levels are found in clam shell charcoal of 800 oC which is 6,717 %, and of 500 oC which is 43,282 %. The result concluded that the effect of the temperature of the production process affects the water content, ash, volatile matter and fixed carbon.
Rancang Bangun Monitoring Early Warning System Bencana Banjir Berdasarkan Ketinggian Aliran Sungai Mengunakan Modem SIM900 dan Internet of Things Sumardiono, Arif; Alimudin, Erna; Zaenurrohman; Susanti, Hera
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1019

Abstract

The rainfall in the Cilacap region is high, about 80-100mm in October-March. The high rainfall that causes the overflow of river water is unpredictable. The high water discharge is not realized until the river water overflows and causes flooding. Therefore, a river water level monitoring system is needed to detect river overflows early. This tool uses a solar cell as a power supply. The monitoring system is divided into two points of river water level monitoring system with a distance between points for the laboratory scale stage, which is 100 meters. Sensors that measure the height of river flow are ultrasonic sensors. The sensor results are processed by microcontroller and SIM 900 L module to be sent to the database. When the water level is in the Alert level 3, the buzzer will sound as a warning. The ultrasonic sensor test results have a very small error. Sensor 1 has an average error of 0.00023% and ultrasonic sensor 2 has an error of 0.00016%. The system is able to transmit river water level data that can be accessed through the website.
Sistem Informasi Geografis Pemetaan Daerah Rawan Bencana Alam dengan Metode End User Development Susanto, Agus; Setiawan Prabowo, Annas; Kategan, Achmad; Dzikril Majid, Akshal
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1025

Abstract

Cilacap is the largest district in Central Java with an area of 225,361 hectares. Topographically, Cilacap Regency is located at an altitude of 1-198 meters above sea level, stretching from west to east. With this condition, Cilacap Regency is an area that is prone to natural disasters such as floods, landslides and earthquakes. The area of Cilacap district along with the many areas prone to natural disasters makes the importance of a geographic information system mapping areas prone to natural disasters. With this system, it is hoped that the community and local governments can take precautionary measures before a natural disaster occurs in their area. The purpose of the research is to design a geographic information system for mapping natural disaster-prone areas for the Cilacap Regency web-based area with End User Development method. This method is used because it is able to produce a system that meets user needs directly. The testing the feasibility study of the system is conducted using the SUS (System Usability Scale) method. The results of this study are a geographic information system for mapping natural disasters and website-based evacuation points with the test results getting an average score of 72. This shows that the system can be implemented properly and is able to show the location of the natural disaster evacuation point areas more quickly as well as it is able to help the community and BPBD Cilacap in anticipating natural disasters.
Pengaruh Waktu Karbonisasi Terhadap Kadar Air dan Abu Serta Kemampuan Adsorpsi Arang Tempurung Nipah Teraktivasi Asam Klorida Purwanti Sri Rahayu, Theresia Evila; Dwityaningsih, Rosita; Ulikaryani
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1027

Abstract

The Cilacap region, Central Java, Indonesia is a coastal area that is overgrown with nipa palm trees, making it one of the potential local natural resources to be exploited. Utilization of this plant has been carried out for the fields of food, energy, clothing, pharmaceuticals, and furniture, but as an anode material for lithium-ion batteries is still being researched. Studies on lithium-ion batteries in Indonesia in particular have not started long ago so that research in this field is still limited and few in number, but the development of lithium-ion batteries has become one of the national research priorities in the field of new and renewable energy sources as stated in the Indonesian national research master plan (RIRN) for the period 2017 – 2045. This study was conducted to examine the potential feasibility of activated charcoal from nipah shells as anode material for lithium-ion batteries. The feasibility test parameters studied in this study include water content, ash content and adsorption capacity stated as iodine and methylene blue number which are the basic characterizations for activated charcoal referring to SNI 06-3730-1995. The nipah shell carbonization process was carried out in the presence of oxygen at an optimized temperature of 210 oC with a 1 hour time interval variation from 3 to 8 hours, followed by an activation process using a strong acid, namely HCl with a concentration of 2 M. The experimental results showed the average value of moisture content, ash content, iodine, and methylene blue number are 12.5%, respectively; 1.75%; 2515.9161 mg/g; and 97%, all of which are above the quality standard values, so the conclusion from this study is that activated charcoal from nipah shell has basic characteristics that have the potential to be further developed, including as raw material for lithium-ion battery anodes.

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