Studi Numerik Dengan Model Empat Parameter Untuk Memprediksi Daya Luaran Dari Panel Surya

Solar panel is one of the most promising renewable energies technology that can be an alternative of the fossil fuel energy. Furthermore, an accurate model to simulate the solar panel efficiency and power output is required. In this study, four parameters model is used to simulate the power output of the solar panel. Four parameters are extracted from single diode equation by using Matlab software then validate with manufacturer datasheet and one-day experiment condition. The error value from datasheet and experiment are 0.03% and 3.54%, respectively. Findings show that four parameters model is accurate. In the future, this result can be taken as a valuable reference for researcher and industrial to modelling energy output of the solar panel

ANALISIS TEGANGAN PROPELLER KAPAL PENANGKAP IKAN DI KOTA DUMAI MENGGUNAKAN FINITE ELEMENT ANALYSIS

Propeller merupakan salah satu komponen pada kapal penangkap ikan yang memiliki fungsi untuk menggerakan kapal. Efisiensi dari propeller kapal sangat berpengaruh langsung terhadap mesin utama penggerak pada kapal penangkap ikan. Beberapa kondisi, propeller kapal dirancang untuk menyerap daya seminimal mungkin dan memberikan efisiensi gerak kapal semaksimal mungkin. Gaya rotasi propeller kapal akan menciptakan gaya dorong kapal. Gaya yang bekerja pada propeller kapal terjadi karena adanya gaya dari dorongan dan gaya centrifugal serta torsi dari propeller kapal pada setiap blade yang disebabkan revolusi di sekitar sumbu putar propeller kapal. Oleh karena itu, perhitungan tegangan yang dihasilkan dari gaya-gaya pada propeller kapal sangat sulit di perhitungkan secara akurat. Finite Element Analysis (FEA) telah menjadi solusi untuk memprediksi dari suatu kekuatan material yang tidak dapat ditunjukkan dalam teoritis dan memungkinkan desainer untuk melihat semua gaya secara teoritis yang terjadi pada model. Penelitian ini menggunakan material paduan tembaga yang memiliki number of element sebesar 406674 dan jumlah nodes 640321. Hasil yang didapatkan yaitu tegangan maksimu Von Mises yaitu sebesar   . Sedangkan nilai regangan maksimum yaitu sebesar 0,2448 dan nilai displacement maksimum sebesar 133 mm. Nilai safety factor pada penelitian ini sangat rendah yaitu 0. Sehingga geometri desain model propeller sangat rawan terjadi kegagalan atau deformasi saat diaplikasikan

Studi Numerik Kontur Pola Aliran Fluida Pendinginan Pada Mold Injeksi Molding

The conventional cooling process was chosen because of the better estimation of manufacturing times and lower manufacturing costs. One alternative to minimize the decline in quality in plastic products is by using a conformal cooling process. This study will compare the contours of the fluid flow pattern between conventional cooling channels and conformal cooling channels. Case study on a box-shaped product made of PP material which has a melt temperature of 205 ° C. 3D product images were made with Solidwork 2017 software and process simulation using fluent 19.0 software. The results showed that the temperature flow pattern in the conformal channel resulted in a temperature absorption of around 303.2K while the conventional cooling channel was around 302.5K. Then the coolant channel that experiences high pressure drop occurs in the conformal cooling channel around 88888.9 pascals and the conventional cooling channel around 355555.6 pascals

PENGARUH PERLAKUAN ANNEALING DAN SHOOT PEENING TERHADAP KEKERASAN DAN STRUKTUR MIKRO PADA BAJA KARBON JIS S45C

The industrial world is currently growing rapidly. The need for JIS S45C as a structural steel is increasing which is used to manufacture machine components. Efforts to improve the mechanical properties of steel can use heat treatment and surface treatment. One of the surface treatments that is often used in the industrial world is shot peening. This study aims to determine the effect of annealing and shot peening treatment on S45C steel. The effect of treatment is indicated by changes in the results of both transverse and surface hardness tests and the microstructure of the treatment results. The result is a change in the value of hardness and microstructure changes in JIS S45C from the effect of annealing and shot peening treatments. The highest hardness in the annealing heat treatment and the 15 minute shot peening treatment was 252.08 kgf/mm2. The shot peening treatment causes the grains to become finer from the surface to the subsurface depending on the distance from the surface to the surface depth. These changes cause the surface and subsurface of JIS S45C carbon steel to increase in mechanical properties

Desain dan Analisis Mata Pisau Pencacah Untuk Pengolahan Sampah Plastik Menggunakan Finite Element Analysis

Plastic waste is one of the environmental problems in Indonesia. Plastic waste is a type of waste that is difficult to decompose, so it needs special handling for processing the problem. One alternative offered is by making a plastic chopper machine. One of the manufacturing of a machine is to design and analyze the components used. The blade is one of the important components of a plastic chopper. Model simulation of the blade itself needs to be done to analyze the performance of the blade during the performance of the machine. Simulation modeling is done using CAE software.. The form of meshing in the blade model is using tetrahedral and the meshing ratio is close to 1. The results obtained from the blade modeling process are the maximum Von mises stress on the loading of 300N, 500N, and 700N respectively at 6.752 x 10-3 MPa, 2.845 x 10- 3 MPa and 1,575 x 10-3MPa. While the amount of displacement in the variation of loading 300N, 500N, and 700N respectively has a value of 6.752 x 10-2 mm, 1.125 x 10-1 mm and 1.575 x 10-1 mm. The safety factor in this simulation is produced which has a value of 15, which means it is safe for all loading variations because it has a value of more than 1

Rekayasa Peningkatan Kekerasan Permukaan Gear Sprocket Sepeda Motor dengan Metode Quenching Variasi Media Pendingin

This study used an experimental research method, which is a research method that aims to understand the causal process by treatment and conducting controlled testing on a sample of research subjects. This research uses quantitative methods by taking research data in the form of numbers. The material used in this study is the gear sprocket. A gear sprocket is a motor component that transmits power from the engine to the rear wheels so that the motor can run optimally. The sprocket gear was heat treated at 850 ℃ with a holding time of 20 minutes. The variations of quenching media are mineral water, dromus coolant, and SAE 40 oil. Hardness and microstructure tests were carried out for each specimen to determine the effect of different cooling media on the quenching process. The results of this study indicate the highest specimen hardness value was obtained at 301 HV by immersion in mineral water media. The lowest hardness was obtained at 207 HV with SAE 40 oil media immersion. Meanwhile, the non-treatment material hardness is 150 HV. In this case, there was an increase in the highest hardness of about two times compared to non-treated specimens. Observation of the microstructure shows that the grain size of the mineral water quenching specimens looks smaller than that of the non-treatment models. This phenomenon supports the idea that quenching can increase the surface hardness of the gear sprocket

PERBAIKAN KEKERASAN DAN STRUKTUR MIKRO LOGAM KUNINGAN SEBAGAI BAHAN PROPELLER DENGAN METODE SHOT PEENING

Brass metal is widely used as a supporting equipment material, one of which is a propeller. The propeller itself is one component of the boat that rotates and produces thrust energy. The continuous use of propellers results in degradation or a decrease in quality and service life. The degradation of the propeller is affected by the hardness, toughness, and corrosion resistance of the working environment. To improve the quality of the propeller, shot peening treatment was carried out on its surface. Shot peening is a continuous shooting process with fine particles in the form of steel balls on the surface of the object. Shot peening can increase the density of the microstructure and produce compressive residual stress which causes the surface hardness to also increase. Shot peening is carried out with variations in duration of 2, 4, 6, 8, and 10 minutes, 100 mm shooting range, and 7 Bar firing pressure. The steel ball particles used have a hardness of 40-50 HRC and a diameter of 5 mm. The results of the hardness test showed an increase in the surface hardness of the spesimens for a duration of 2, 4, 6, 8, and 10 minutes, respectively 189, 294, 302, 324, 330, dan 341 HV. The microstructure of the spesimen after shot peening looks tighter and denser. The highest hardness value is 341 HV or an increase of 80% compared to raw material

EDUKASI TEKNOLOGI PANEL SURYA SEBAGAI SUMBER ENERGI LISTRIK AQUAPONIK DI KELURAHAN TANJUNG PALAS KOTA DUMAI

The source of electrical energy is one of the main components in everyday life. The development of technology today requires all people to be able to take advantage of renewable energy, one of which is solar energy. The solar panel is an energy conversion machine that can produce electrical energy. Coastal communities have an abundance of solar energy sources that can be utilized by solar panels as alternative electrical energy in the aquaponics system that has been built. The majority of the people of Tanjung Palas Village, Dumai City, are fishermen. So that there is a need for additional economic income besides being a fisherman. On the other hand, the community still does not understand the operation and maintenance of solar panels due to knowledge problems. Therefore education and the installation of solar panels as a source of aquaponic electricity are alternative solutions offered to the community. The educational activity of solar panels as a source of aquaponic electricity is carried out in collaboration with CSR PT Pertamina RU II Dumai with the Dumai Marine and Fisheries Polytechnic. The result of this activity is that the level of understanding of participants from per category always increases. The knowledge category increased from 39% of participants to 93% of participants, the operating category increased from 14% of participants to 94% and the care category increased from 14% of participants to 95% of participants. In addition, the level of satisfaction of the participants shows that 25% of participants are very satisfied and 75% of participants are satisfied with this activity. Recommendations for the results of activities that have been carried out are that there is a need for follow-up activities so that the community can better utilize solar panels as alternative electrical energy

STUDI EKSPERIMEN PANEL SURYA DENGAN KOLEKTOR PEMANAS UDARA

Solar panel is popular renewable energy technology because it is environmentally friendly, zero emissions, and environmentally clean.  However, the energy conversion value from solar radiation to electricity is quiet small, more than 70% of solar radiation is discharged into heat energy.  Therefore, a heat collector is needed to take advantage of the heat dissipation from solar panel. In this study, an air heat collector is placed at the bottom of the panel to indicating the potential energy, electrical efficiency and heat efficiency. It was found that solar panels with air heat collectors were able to increase the electrical efficiency of solar panels by 0.70%. The daily primary total energy efficiency value of solar panels with a heat collector is 17.47% higher than a solar panel without a collector. In the future, the results of this research can be a reference for academics and industry to develop their renewable energy potential

STUDI PERANCANGAN PISAU PADA MESIN PENCACAH PLASTIK MENGGUNAKAN FINITE ELEMENT ANALYSIS

The amount of plastic waste each year will increase by 10% every year which is a problem for a country. Therefore, proper processing of plastic waste needs to be done. Before being processed into plastic waste processing, it is necessary to have a chopping process using a plastic chopping machine. The plastic chopping machine has an important component, namely the chopping knife. Before carrying out the knife manufacturing process, it is necessary to validate the design of the blade that is used with its loading. Model simulation using software is one way to quickly validate the model. This study aims to determine the effect of loading variations on stress, strain, deformation and safety factors of the model. The use of ANSYS R17.2 software is used to analyze the chopping machine knife model with a variation of 5kg / hour, 10kg / hour, 20kg / hour and 50kg / hour capacities. The result is that the stress, strain and deformation parameters have an increase in value with increasing loading variations. The greatest values of stress, strain and deformation are in the variation of 50kg / hour respectively 64.995 Pa; 336.76 and 56,358 x 10-11mm. The value of the safety factor for all variations of loading has a value of 15. The value of the safety factor means that the design of the plastic chopping knife is safe to use up to a loading of 50kg / hou