E-Journal Politeknik Negeri Cilacap
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Rancang Bangun dan Pengujian Performa Mesin Pembubur Sampah Organik Menjadi Pakan Maggot Kapasitas 24 kg/jam
Full text linkOrganic waste management, particularly from canteens or kitchens, which often consists of leftover meat, fish, and vegetables, remains a significant challenge. If processed properly, this waste has the potential to be used as maggot feed. To process this organic waste, it is necessary to develop an organic waste slurry machine designed to process organic waste from the Pujasera or campus canteen into maggot feed. The development process for this machine includes six stages: Planning, Conceptual design, Detailed design, Technical documentation, Manufacturing and assembly, and Testing. From these stages, a compact organic waste slurry machine is produced with dimensions of 815 x 425 x 840 mm, driven by a 1-phase electric motor with a power of 1.5 HP (1,100 Watts) and a rotation speed of 1,050 RPM. The test results show that this machine is effective in shredding organic waste with a capacity of 24 kg/hour, a maximum power of 1,037 Watts, and an energy consumption of 0.860 kWh. These results provide an innovative and economical solution, promoting the use of organic waste as a valuable resource
Uji Performa Engine Fuel Injection Berbahan Bakar Gasoline-Butanol dan Gasoline-Ethanol
Full text linkThe energy crisis is largely attributed to the extensive use of fossil fuels. Butanol and ethanol can be used as an alternative energy source because their characteristics are superior to those of gasoline, such as RON and oxygen content. This study aims to determine the effect of gasoline-butanol and gasoline-ethanol mixtures on engine performance so that they can be an option to replace fossil fuels. The percentage of alcohol (butanol and ethanol) in gasoline is 5%, 10%, and 15% with variations in engine speed of 1000, 2000, and 3000 rpm. This study uses a dynamometer as a tool to measure engine performance. Test results show that E15 can increase engine torque and power by up to 26%, while B15 increases by 19%. In addition, ethanol can reduce BSFC better than butanol. The BSFC value decreased by 17% in E15, while B15 decreased by 15% compared to pure gasoline. This is because ethanol\u27s RON and oxygen content are higher, so torque and power increase while BSFC decreases. These results prove that gasoline-ethanol is better at improving engine performance than gasoline-butanol
Rancang Bangun Alat Estimasi Nilai Lumen Lampu Berbasis Internet of Things dengan Aplikasi Android Blynk
Full text linkThe development of lighting technology, particularly LED lamps, drives the need for light intensity testing (lumen) to ensure quality and energy efficiency. The SNI IEC 62612:2016 standard establishes testing parameters that must be met, but field testing processes are still largely manual and inefficient. This research aims to design and realize an Internet of Things (IoT)-based lamp lumen value testing tool with results displayed on an Android application as a practical and automated solution. The tool is designed according to the SNI IEC 62612:2016 standard, equipped with a BH1750 sensor to measure light intensity (lux), a PZEM-004T sensor to measure voltage and current, and an MLX90614 sensor to measure lamp surface temperature. The testing process is performed automatically using a NodeMCU ESP32 microcontroller, with measurement results displayed on a 20x4 LCD and transmitted to the Blynk application on Android in real-time. Testing on 16 LED lamp samples from various brands and powers showed that the system has high accuracy with average BH1750 sensor accuracy of 98.78%, MLX90614 sensor accuracy of 99.74%, PZEM-004T sensor accuracy for voltage of 99.9% and current 100%, as well as error-free data transmission to Android applications. This tool successfully performs lumen testing automatically, accurately, and efficiently according to national standards
Prototipe Stasiun Penukaran Baterai Kendaraan Listrik Umum (SPBKLU) Ringan Berbasis Energi Surya untuk Sepeda Listrik
Full text linkThe transition to electric vehicles in Indonesia continues to progress, along with increasing awareness of the importance of reducing emissions and utilizing renewable energy. One of the challenges still faced is the limited infrastructure for charging and battery swapping. This study designed a battery charging system using two 100Wp solar panels connected in parallel to increase the charging current, and a Maximum Power Point Tracking solar charge controller to regulate the input current to the battery. Tests were conducted on three variations of battery capacity, namely one battery (12 Ah), two batteries (24 Ah), and four batteries (48 Ah), to evaluate the efficiency and charging time of the batteries. The results showed that the charging time for each variation ranged from 3 to 6 hours, depending on the number of batteries and solar irradiation conditions. The designed lightweight Public Electric Vehicle Battery Charging System (SPBKLU) proved to be a sustainable emergency solution for battery charging using renewable energy sources
Pengendalian Emergency Lowering System (ELS) Pada Lift 3 Lantai
Full text linkPower outages in multi-storey buildings can cause elevators to stop operating and pose safety risks to users. One effective solution to address this issue is the implementation of an Emergency Lowering System (ELS), which enables the elevator to move to the nearest floor when the main power supply fails. This study aims to design and evaluate an Emergency Lowering System (ELS) for a three-floor elevator based on an Arduino Mega, equipped with a backup power system using an inverter and battery, as well as load monitoring using a load cell sensor. The research methodology includes hardware and software design, load cell sensor calibration, and system testing under various load conditions and power outage scenarios. The experimental results show that the ELS is capable of transferring the power source with an average switching time of less than 5 seconds. The load cell measurement error was recorded at 0.16%, indicating reliable load detection. Consequently, the elevator can be safely lowered to the nearest lower floor during a power failure. These results demonstrate that the developed ELS system has strong potential to enhance the safety and operational reliability of small-scale elevators, particularly in low-rise buildings
Pemberdayaan Masyarakat Pesisir Desa Kutawaru Cilacap Melalui Inovasi Pangan Lokal Berbasis Buah Mangrove Rhizophora Mucronata
Full text link Kutawaru Village is a coastal village in Cilacap Regency with significant potential for local food innovation based on mangrove resources. The Kutawaru Independent Community Group (MAMAKU) had not previously utilized mangrove fruits, particularly Rhizophora mucronata, as food products. This community empowerment program was conducted through socialization and hands-on training on processing mangrove fruits into flour and derivative products such as cookies. The program applied an Asset Based Community Development (ABCD) approach, focusing on local natural assets in the form of Rhizophora mucronata mangrove vegetation surrounding the partner area. The results showed an increase in community empowerment, reflected in improved knowledge and practical skills in mangrove fruit processing. Participants’ understanding increased from 38.5% with no understanding, 53.8% with limited understanding, and 7.7% with sufficient understanding to 100% of participants being able to understand and independently practice mangrove fruit processing.
Optimalisasi Ko-Pirolisis Campuran Eceng Gondok dan Batubara Muda Terhadap Produksi Bio-Oil, Gas, dan Char
Full text linkOne of the abundant biomass resources in Indonesia is water hyacinth, which can be converted into energy through pyrolysis. This research explores the effect of temperature on the co-pyrolysis process of a mixture of water hyacinth and young coal to produce bio-oil, gas, and char. The method used is pyrolysis with temperature variations on the mixture of water hyacinth and young coal in a batch reactor. The testing was conducted at a temperature of 400°C with various compositions of water hyacinth and coal mixtures, and the resulting products in the form of bio-oil, gas, and char were then measured to determine the yield. The research results show that in the pyrolysis of pure water hyacinth, gas production reaches 120 grams, bio-oil 108 grams, and char 72 grams. The addition of coal up to 30% increases char production to 113 grams, but decreases gas production to 94 grams and bio-oil to 87 grams. The gas produced is dominated by methane (67.315%) in a mixture of 70% water hyacinth and 30% coal, while hydrogen reaches 33.721% in pure water hyacinth
Sistem Hybrid Energi Terbarukan pada Alat Pemipil Jagung
Full text linkMesin pemipil jagung menggunakan motor listrik sebagai penggerak utamanya dan panel surya yang terhubung dengan baterai sebagai sumber energi utamanya dan PLN sebagai sumber energi cadangan. Dengan adanya mesin ini diharapkan mampu meringankan beban petani jagung dalam proses pemipilan yang tadinya masih menggunakan tenaga manual bahkan menggunakan mesin besar dengan biaya yang relatif mahal. Tujuan perencanaan mesin pemipil jagung tenaga panel surya yaitu untuk mengetahui cara membangun alat pemipil jagung menggunakan teknologi panel surya dan untuk mengetahui berapa kapasitas produksi yang dihasilkan mesin pemipil jagung dalam waktu 1 menit. Berdasarkan hasil pengujian sebanyak 5 kali.Nilai rata-rata kapasitas mesin dalam memipil jagung sebesar 760,6 gram/menit
Studi Pengaruh Metode Pengendalian Motor Terhadap Konsumsi Energi Pada Sistem Cooling Tower
Full text linkCooling tower fan motors commonly still operate using a direct-on-line (DOL) system with constant speed, which leads to high energy consumption. This study aims to compare the energy consumption between the DOL system and the variable speed drive (VSD), as well as to evaluate their economic feasibility. A quantitative approach is applied through operational data analysis and simulations using MATLAB Simulink. Two operating scenarios are tested: full operation using DOL and using VSD. The simulation results showed that VSD was able to reduce energy consumption by 22.08 without reducing cooling efficiency. The economic evaluation is carried out through a payback period analysis based on investment costs and annual energy savings. These findings demonstrate that VSD is economically viable and can be gradually implemented as an energy efficiency strategy in high-load cooling systems
Perancangan dan Simulasi Penggunaan Pembangkit Listrik Tenaga Surya Atap On Grid Pada Gedung Kuliah dan Laboratorium
Full text linkIndonesia has a large solar energy potential, with an average radiation of 4.5-4.8 kWh/m² every day. Politeknik Negeri Cilacap (PNC) can take advantage of this opportunity to develop a Solar Power Plant. This study examines the possibility of building an on-grid rooftop solar power plant in the Department of Electrical and Mechatronics Engineering. This study uses Homer to simulate the solar power plant design. The parameters discussed are total energy production (kWh/year), renewable fraction, net present cost/NPC (Rp) which is all costs used in construction, both in installation and operation of the solar power plant and Cost of energy/COE (Rp/kWh) which is the cost incurred to produce electrical energy per 1 kWh. The results of the study include an average solar energy at PNC of 4.66 kWh/m²/day. Based on Homer\u27s simulation results, the total energy generated by the solar power plant is 149,056 kWh/year, with 68,599 kWh/year from photovoltaic and 80,457 kWh/year from the PLN grid. The renewable fraction is 44.8%. The NPC is Rp 1,880,000,000, and the CoE is Rp 1,000/kWh