Kebutuhan akan listrik baik untuk kalangan industri, perkantoran, maupun masyarakat umum dan perorangan sangat meningkat. Tetapi, peningkatan kebutuhan listrik ini tidak diiringi oleh penambahan pasokan listrik. Berdasarkan permasalahan tersebut, energi surya dipilih sebagai energi alternatif untuk menghasilkan energi listrik. Alat yang digunakan disini adalah sel surya, karena dapat mengkonversikan langsung radiasi sinar matahari menjadi energi listrik (proses photovoltaic). Agar energi surya dapat digunakan pada malam hari, maka pada siang hari energi listrik yang dihasilkan disimpan terlebih dahulu ke baterai yang dikontrol oleh regulator. Keluaran regulator langsung dihubungkan dengan inverter dari arus DC ke AC. Hasil pengujian modul surya (photovoltaic) terlihat bahwa hasil daya keluaran rata-rata mencapai 38,24 Watt,dan arus yang didapatkan sebesar 2,49 A (Ampere). Hal ini dikarenakan photovoltaic saat mengikuti arah pergerakan matahari akan selalu memposisikan photovoltaic untuk tetap menghadap matahari sehingga tetap akan dapat menangkap pancaran matahari secara maksimal. [Title: Design Analysis of System Power Solar Cells Capacity of 50 Wp] The need for electricity is good for the industry, offices, and public and individuals are greatly increased. However, the increase in demand for electricity is not accompanied by the additional power supply. Based on these problems, chosen solar energy as an alternative energy to generate electric power. A tool that is used here is the solar cell because it can directly convert solar radiation into electrical energy (photovoltaic process). So that solar energy can be used at night, then during the day, the electrical energy generated is stored before a battery which is controlled by the regulator. Regulator output is directly connected to the inverter from the DC to AC. The test results of solar modules (photovoltaic) indicated that the results of the average power output reached 38.24 Watt, and the currents were 2.49 A. This is because the photovoltaic follows the direction of movement of the sun and always located at the photovoltaic to remain facing the sun. Therefore, it will still be able to capture the radiant sun to the fullest.
ABSTRAK
Indonesia merupakan negera yang memiliki sumber energi baru dan terbarukan yang belum dikembangkan secara optimal dan besar-besaran digali dan digunakan
Air refreshing is a process of cooling the air so it can reach the temperature and humidity in accordance with the air condition requirements of a certain room that can regulate air flow and cleanliness. In the design of cold storage, the most decisive stage is when calculating the heat load that will be a reference for the designer in the compressor selection. PT. Mayekawa Indonesia in this case fulfill customer demand to design cold storage room, ante room and stuffing room with the need to freeze edamame (soybean) with capacity of 2410 ton / day. Obtained hasi calculation and analysis obtained by refrigeration load for cold storage room 12 equal to 42.63kW, for cold storage 13 equal to 26.23kW, ante room equal to 26.36kW, stuffing room equal to 10.76kW, and for room futures 1 and 2 obtained refrigeration load equal to 42.63 KW and 26.23kW. So that obtained total refrigeration equal to 105.58kW. The selection of components in the refrigeration system is a component compressor using the application (software) My Com W version 2016 Compressor with type Recipro N62WBHE as much as 2 units (1 Unit as a back up) with a capacity of 113.1 kW.
Development and use of nuclear energy is currently growing very rapidly, in order to achieve increasingly advanced technology, both in terms of design, economic factors and safety factors. Thermal-hydraulics aspects of nuclear reactors should be done with calculation and near-perfect condition. Including today began development of a nuclear reactor with low power below 300 MW, or commonly called the Small Modular Reactor (SMR). One is CAREM-25 developed by Argentina with a power of 25 MW, where in CAREM already using natural circulation system and the use of nanofluid as coolant fluid. In this research, analytic modeling of thermal-hydraulics nuclear reactor SMR CAREM-25, when the nanofluid Al2O3-Water used as cooling fluid in the cooling system of a nuclear reactor. Further to this analytic modeling will be done on CFD. Analytic modeling with CFD to determine the flow phenomena and distribution as well as the effect of nano-particles of Al2O3-Water based on the volume fraction (1% and 3%) of the coefficient of heat transfer by natural convection.
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