Principally, renewable energy technology produces energy by converting natural resources into useful forms of energy. Bio-battery is an alternative natural energy source that utilizes nanoparticles from plants to generate electricity. In this study, coffee grounds were used as an electrolyte paste to produce bio-battery. This study aims to determine the potential use of spent coffee grounds as an electrolyte paste. Furthermore, the analysis of the composition of the best coffee grounds to produce the optimum current and the level of effectiveness of the bio-battery in terms of the current value. To determine whether there is an effect of coffee grounds concentration on the resulting current, a series of experiments were carried out to determine the best composition between the type and concentration of coffee grounds. Characterization of the device produces a maximum voltage of 1.11 ± 0.09 V and a power of 0.25 mW. The combination of series and parallel needs to be developed to achieve higher circuit voltages and power.
Bio-battery is an alternative natural energy source that utilizes organic compounds to generate electricity. This research uses coffee grounds as an environmentally friendly electrolyte paste. This study aims to identify and analyze the current and voltage produced by the bio batteries with the durability of bio batteries made from Arabica coffee grounds based on electrode distance and dryness level. The method used is a direct measurement of coffee grounds using copper (Cu) and zinc (Zn) as electrodes, further testing of the output current and voltage is carried out every 24 hours. The results showed that Arabica coffee grounds produce a maximum voltage of 1.01 V, a current of 0.49 mA and a power of 0.42 W. Based on these results, Arabica coffee grounds have the potential to be used as bio batteries.
Energi listrik merupakan energi yang sangat dibutuhkan dalam berbagai aspek kehidupan manusia. Pertambahan beban harus seiring dengan ketersediaan sumber energi listrik. Dalam sistem tenaga listrik transformator distribusi memilki peran penting dalam menurunkan tegangan menengah 20 kV menjadi 220/380 V. Keandalan sistem tenaga listrik harus memiliki persentase pembebanan tidak lebih dari 80%, persentase drop tegangan tidak lebih dari 10% dan ketidakseimbangan beban tidak lebih dari 20%. Telah terjadi penggantian transformator distribusi 50 kV di Lembang Bori’ Ranteletok dari 1 fasa menjadi 3 fasa. Hasil penelitian menunjukkan bahwa transformator terpasang memiliki pembebanan minggu pertama 45,97%, minggu kedua 46,99%, minggu ketiga 52,55% dan minggu keempat 46,37%. Sesuai syarat kehandalan sistem tenaga listrik beban penuh atau pembebanan transformator tidak melebihi 80%. Persentase drop tegangan didapatkan sesuai dengan syarat kehandalan sistem tenaga listrik yang tidak melebihi 10%. Persentase faktor ketidakseimbangan beban minggu pertama 11,76 %, minggu kedua 31,47 %, minggu ketiga 14,94 % dan minggu keempat 23,53 %. Minggu pertama dan ketiga sesuai syarat kehandalan sistem tenaga listrik, untuk minggu kedua dan keempat tidak sesuai syarat kehandalan sistem tenaga listrik karena persentase ketidakseimbangan beban lebih dari 20%.
Toraja telah dikenal dengan keunikan budaya termasuk rumah adat yang disebut Tongkonan. Kajian penelitian rumah adat Tongkonon selama ini masih terbatas pada struktur bangunan. Penelitian ini bertujuan untuk mengidentifikasi prinsip fisika yang ada pada rumah adat Tongkonan Toraja khususnya pada tiang yang dapat menjadi sumber pembelajaran fisika. Pengumpulan data dilakukan melalui wawancara, observasi dan dokumentasi. Lokasi penelitian dilakukan di Tongkonan Ba’tan Ratu, Kabupaten Tana Toraja dan yang menjadi subjek penelitian adalah tokoh adat dan tukang kayu yang memiliki pemahaman terkait struktur Tongkonan. Metode yang digunakan dalam penelitian ini adalah metode kualitatif dengan bentuk ekplanasi deskriptif. Hasil penelitian menunjukkan bahwa terdapat prinsip fisika pada tiang rumah adat Tongkonan yang perlu untuk diketahui. Keseimbangan rumah Tongkonan dapat dilihat dari cara menyusun dan menata setiap tiang sehingga berbentuk seperti sistem struktur rangka di mana balok dan kolom saling menguatkan satu dengan yang lain serta adanya tiang yang dipasang melintang secara horizontal yang menahan agar Tongkonan tidak mengalami gerak ketika ada gaya yang diberikan. Tekanan terjadi pada tiang dengan batu penyangga di mana tiang menerima gaya beban yang diberikan oleh badan dari Tongkonan. Gaya yang bekerja antara tiang dengan batu penyangga yaitu gaya normal dan gaya berat, di mana gaya normalnya berada pada tiang dengan arah vertikal ke atas sedangkan gaya beratnya sama dengan gaya normal tetapi berlawanan arah atau gaya beratnya, yaitu gaya yang diteruskan dari tiang ke permukaan bumi secara vertikal. Berdasarkan hasil di atas menunjukkan bahwa rumah adat Tongkonan dapat dijadikan sebagai sumber pembelajaran fisika berbasis kearifan lokal. Toraja has been known for its unique culture, including a traditional house called Tongkonan. So far, research studies on the Tongkonon traditional house have been limited to building structures. This study aims to identify the physics principles in the Tongkonan Toraja traditional house, especially on the poles, which can be a source of learning physics. Data collection was carried out through interviews, observation, and documentation. The research was conducted in Tongkonan Ba'tan Ratu, Tana Toraja Regency. The research subjects were traditional leaders and carpenters who understood the structure of Tongkonan. This study used a qualitative method with an explanation form of descriptive. The results of the study show that there are principles of physics in the poles of the Tongkonan traditional house that need to be known. The balance of the Tongkonan house can be seen from the way each pillar is arranged and arranged so that it is shaped like a frame structure system where the beams and columns reinforce one another. Some poles are mounted horizontally across, which hold the Tongkonan from moving when a force is applied. Pressure occurs on the pillar with supporting stones where the pole receives the load force exerted by the body from the Tongkonan. The force acting between the pile and the supporting stone is the normal force and gravity, where the normal force is on the pole in a vertically upward direction while the gravity is the same as the normal force but opposite in direction or gravity, that is, the force is transmitted from the pole to the earth's surface vertically. The results above show that the Tongkonan traditional house can be used as a source of physics learning based on local wisdom.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.