Rice harvesting machines that can be operated in swampy, peatland, narrow and can be operated and maintained by farmers, can be considered for design, some previous research has been carried out, including a two-lane mini rice harvester with a performance of 20.33 hours per hectare and has been in manufacturing and in performance tests. Experimental studies on engine performance were carried out in this research. This research uses 2x50 watt peak polycrystalline solar panels connected to a 12 volt 45 AH battery, the battery will drive a 50 watt electric motor. Current and voltage measurements are carried out on the solar panel and battery when in condition, first the solar panel is connected to the battery and not connected to the electric motor, the second solar panel is connected to the battery and connected to the electric motor, the three solar panels are not connected to the battery and the battery is connected to electric motor. The results of the first condition study indicate that the electric current will be more stable using a new battery, when compared to using a battery in the previous study. The second condition was that the performance of the two-lane mini rice harvester increased by 50% when compared to the performance of an electric motor using a battery that was not connected to a solar panel. The third condition shows the performance of the electric motor has increased by up to 300% when compared with the results of previous studies, it is estimated that the electric motor will continue to rotate for up to 8-10 hours.
Seiring dengan perkembangan peradaban manusia, tingkat kebutuhan energi juga semakin meningkat. Pemenuhan energi dewasa ini masih didominasi oleh pembakaran bahan bakar fosil sedangkan energi yang berasal dari energi terbarukan masih terabaikan. Pembangkit listrik tenaga angin merupakan salah pembangkit listrik yang menggunakan sumber energi terbarukan yang banyak digunakan, karena sifat energi angin yang ramah lingkungan serta mudah dalam melakukan pengoperasian. Indonesia saat ini sedang mengalami krisis energi listrik karena kebutuhan energi listrik yang semakin besar akibat adanya pertumbuhan industri, peningkatan jumlah pemakaian alat elektronik rumah tangga, perkembangan teknologi dan komunikasi, dan sebagainya. Aceh barat merupakan salah satu kabupaten yang terletak di Aceh dengan ibukota bernama Meulaboh. Aceh barat mempunyai letak menurut garis lintang dan bujur yaitu 04006’-04047’ Lintang Utara dan 95052’-96030’ Bujur Timur, dengan luas daerah 2.927,95 Km2 dan mempunyai 12 kecamatan serta 321 kampung. Penelitian ini dilakukan bertujuan untuk menghasilkan analisis mawar angin sebagai dasar prediksi daya angin dikota Meulaboh. Dari analisis didapatkan bahwa Mawar Angin tersebut memperlihatkan distribusi energi angin selama kurun waktu setahun dalam arah 3600. Arah angin maksimum terjadi pada arah 3000 dan distribusi terendah terjadi pada arah 800.
Statistical Energy Analysis (SEA) is a well-known method to analyze the flow of acoustic and vibration energy in a complex structure. This study investigates the application of the corrected SEA model in a non-reverberant acoustic space where the direct field component from the sound source dominates the total sound field rather than a diffuse field in a reverberant space which the classical SEA model assumption is based on. A corrected SEA model is proposed where the direct field component in the energy is removed and the power injected in the subsystem considers only the remaining power after the loss at first reflection. Measurement is conducted a box divided into two rooms separated by a partition with an opening where the condition of reverberant and non-reverberant can conveniently be controlled. In the case of a non-reverberant space where acoustic material was installed inside the wall of the experimental box, the signals are corrected by eliminating the direct field component in the measured impulse response. Using the corrected SEA model, comparison of the coupling loss factor (CLF) with the theory shows good agreement.
Mesin Penyangrai kelapa kukur (U Neuleu) adalah mesin yang digunakan untuk melakukan proses sangrai dengan cara penggorengan tanpa menggunakan minyak dan tangan manusia. Desain alat akan menjelaskan bagaimana proses menggambar bagian-bagian dari alat yang akan di rancangan oleh karna itu perlu persiapan yang matang untung mendesain suatu alat agar waktu proses pembuatan nya tidak akan terjadi kesalahan dimana nanti nya waktu pembuatan alat harus sesuai dengan gambar yang sudah di buat sebelumnya. Mesin sangrai ini bekerja secara Otomatis yang di kontrol mengunakan Adruino UNO untuk Rangkaian elektrikal menggunakan arduino untuk bisa mengatur waktu matinya motor DC saat melakukan penyangraian, pengontrolan waktu menghidupkan alat penyangrai sebagai otomasi yang mengurangi ketergantungan dari kontrol operator, bisa dilakukan dengan pengaturan waktu penyangrai sesuai dengan kematangan U Neuleu. Kata kunci: mesin pneumatic power forging hammer, analisa kekuatan rangka, autodesk inventor 2017.
Road lighting is important for transportation activities, especially at night. The design of this Hybrid plant has a working principle that is utilizing wind gusts from a passing vehicle to turn the turbine blade and the heat of solar radiation that is absorbed through the solar panel with the sun tracking system. Parameter data that influence in the design of Hybrid Generations are variations in the number of turbine blades, turbine angle, wind speed, turbine drive rotor height, density of air and heat of solar radiation. The purpose of the problem in Designing Hybrid VAWT generating systems with the optimal angle of the turbine and Solar Cell automatically to be able to meet the electrical energy requirements for street lighting. The research method used in design through three stages, namely literature review, Technical Design and preparation of work tools and materials. The design results show that the optimal type u vertical wind turbine for toll road lighting with 3 blades and an optimal angle size of 90 0C, rotor diameter of 400 mm, rotor height of 1000 mm for average wind speed of 13.9 m / s. and Average solar heat of 28 0C with an average panel temperature of 55.3 0C using the Timer switch as a solar tracking system. The design of the plant, produces turbine power of 0.93 V to 1.17 V at 122 rpm to 214 rpm. And the solar panel produces a panel voltage of 19.59 V and an average voltage on the battery of 14 V. The stored electrical energy is able to light two LED lights with a power of 15 Watt and last for 12 hours / dayKeywords— Hybrid Power Generation, Optimal Angle, Timer Switch
Palm shell is a waste from palm oil production which is shaped like a shell with a hard layer character that aims to protect the palm kernels. The addition of palm shells to concrete is an innovation and breakthrough in the more productive use of palm oil waste. In this study, the percentage of addition of palm shells was used, among others, 0%, 7% and 14% by weight of cement with variations in the cement water factor (FAS) of 0.35, 0.45 and 0.50. The test object used was a cube (15 x 15 x 15) cm with a total of 9 test objects for each FAS with a test time of 28 days. The results of the concrete compressive strength test obtained data for FAS 0.35, the average compressive strength for BTCS was 348.15 kg/cm2, BDCSA (7%) was 363.07 kg/cm2 and BDCSB (14%) was 302.90 kg/cm2. FAS 0. 45 the average compressive strength for BTCS was 292.59 kg/cm2, BDCSA (7%) was 303.20 kg/cm2 and BDCSB (14%) was 249.27 kg/cm2. FAS 0.50 average compressive strength for BTCS was 273.09 kg/cm2, BDCSA (7%) was 271.53 kg/cm2 and BDCSB (14%) was 219.47 kg/cm2. The test results show that the average concrete compressive strength is influenced by the cement water factor (FAS) and the percentage of addition of palm shells in the concrete mix.
Mesin pneumatic power forging hammer merupakan mesin yang mempermudah pekerjaan para pandai besi dalam membuat parang, pisau dan lain sebagainya. Pada perancangan dan analisa kekuatan rangka mesin pneumatic power forging hammer dilakukan analisa terkait pemilihan model rangka guna mengetahui kekuatan material dalam menahan setiap komponen mesin pneumatic power forging hammer dan menguji daya tampung terhadap variabel pembebanan yang diberikan yaitu 1570 N . Penelitian ini menggunakan software Analisa Numerik yang dilengkapi dengan metode finite element analysis (FEA). Dari hasil analisa simulasi dipilihlah Material Profil U berukuran 40 x 20 mm sebagai rangka utama yang kemudian disimulasikan dengan variasi pembebanan maksimal yaitu 1570 N. Hasil analisis simulasi rangka adalah von misses stress max 17,42mpa, min 0mpa, displascement max 0,2343mm, min 0mm, safety factor max oul, max 15 ul.Kata kunci: mesin pneumatic power forging hammer, analisa kekuatan rangka, Analisa Numerik.
Penelitian ini bermaksud untuk mengetahui emisi gas buang pada mesin motor Honda Supra X 125 Tahun 2006. Penelitian ini menggunakan metode analisa deskriptif. Bahan bakar yang digunakan adalah premium murni (kelompok standart) dan premium yang dicampur dengan bioetanol dengan variasi E2,5, E5, dan E7,5 (kelompok eksperimen). Pengujian dilakukan pada putaran stasioner (1500 rpm), 3000 rpm sampai 8000 rpm dengan interval 500 rpm. Emisi yang diukur pada penelitian ini adalah kadar CO, kadar CO2, Kadar O2, HC dan Lambda (λ). Pengujian dilakukan di Laboratorium Motor Bakar Universitas Negeri Padang. Berdasarkan hasil penelitian dapat disimpulkan pengujian emisi gas buang Sepeda Motor Honda Supra X 125 Tahun 2006 menggunakan bahan bakar campuran bioetanol dari limbah nanas dan premium dapat meningkatkan konsentrasi CO2 menurunkan konsentrasi CO, HC dan O2 dibandingkan dengan bahan bakar premium murni pada putaran stasioner. Bahan bakar E5 merupakan variasi yang paling mereduksi emisi dibandingkan variasi bahan bakar yang lain. Pada putaran stasioner konsentrasi CO hanya 5,46% Vol, dan HC hanya 338 ppm.
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