Pengaruh Jarak Penempatan Posisi Turbin Dengan Permukaan Air Terhadap Performa Turbin Savonius Tipe Cross-Flow

Putra, Dave Johannes (2022) Pengaruh Jarak Penempatan Posisi Turbin Dengan Permukaan Air Terhadap Performa Turbin Savonius Tipe Cross-Flow. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ketersediaan energi dalam jumlah yang cukup merupakan aspek utama yang akan menentukan berjalan atau tidaknya aktivitas manusia di era globalisasi ini. Meningkatnya populasi sama artinya dengan meningkatnya permintaan, jika ketersediaan energi tidak dapat dipenuhi, maka bisa saja terjadi kelangkaan energi yang dampaknya akan sangat buruk bagi perekonomian dunia. Upaya untuk memenuhi semua pasokan energi dan membebaskan Indonesia dari krisis energi dimana pada tahun 2005, dilaporkan telah terjadi krisis energi, yaitu defisit listrik di Sumatera dan Jawa lebih dari 75 MW, Sulawesi sekitar 24 MW, dan wilayah lainnya di bawah 10 MW (DESDM, 2005). Secara umum potensi listrik yang bersumber dari energi terbarukan di Indonesia cukup besar dan belum dimanfaatkan secara optimal Energi arus laut adalah salah satu alternatif energi baru terbarukan, walaupun memang tidak bisa dieksploitasi terus menerus dengan kekuatan yang sama, karena pembangkit utama arus laut adalah pasang surut yang diakibatkan oleh gaya gravitasi bulan dan matahari. Turbin vertical tipe Savonius telah banyak dikembangkan namun berbeda halnya dengan turbin crossflow yang belum banyak dikembangkan. Jarak rendaman turbin mempengaruhi performa turbin karena adanya factor turbulensi di dekat muka perairan (Free surface) dan dekat dasar perairan. Arah putar turbin juga dapat mempengaruhi turbulensi pada turbin sehingga diperlukan perbandingan performa antara arah putar turbin searah jarum jam (Clockwise) dan berlawanan arah jarum jam (Counter-Clockwise). Analisis dilakukan dengan pendekatan numerik (CFD) menggunakan Ansys Fluent. Hasil penelitian menunjukan terdapat peningkatan rata-rata performa pada turbin Savonius tipe crossflow sebesar % pada kedalaman 0.66h dari total kedalaman. Hasil torsi yang dihasilkan rata rata lebih tinggi apabila turbin yang memiliki arah putar berlawanan arah jarum jam diletakan pada kedalaman 0,33h atau dekat dengan permukaan air.
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Availability of energy in sufficient quantities is the main aspect that will determine whether human activities run in this era of globalization. Increasing population is the same as increasing demand, if the availability of energy cannot be met, there could be a shortage of energy which will have a very bad impact on the world economy. Efforts to meet all energy supplies and free Indonesia from the energy crisis where in 2005, it was reported that an energy crisis had occurred, namely electricity deficits in Sumatra and Java of more than 75 MW, Sulawesi around 24 MW, and other areas below 10 MW (DESDM, 2005). In general, the potential for electricity sourced from renewable energy in Indonesia is quite large and has not been utilized optimally. Ocean current energy is one of the new renewable energy alternatives, although it cannot be exploited continuously with the same strength, because the main generator of ocean currents is the tidal wave. caused by the gravitational force of the moon and sun. The Savonius type vertical turbine has been widely developed, but it is different from the crossflow turbine which has not been widely developed. Turbine immersion distance affects turbine performance because of the turbulence factor near the water surface (free surface) and near the bottom of the water. The direction of turbine rotation can also affect the turbulence of the turbine, so it is necessary to compare the performance between the turbine rotation direction clockwise (Clockwise) and counterclockwise (Counter-Clockwise). The analysis was carried out using a numerical approach (CFD) using Ansys Fluent. The results showed that there was an increase in the average performance of the Savonius turbine crossflow type by % at a depth of 0.66h from the total depth. The average torque produced is higher if the turbine which has a counterclockwise rotation direction is placed at a depth of 0.33 h or close to the water surface.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Savonius, Cross-Flow, CFD, Jarak Rendaman, Arah Putar, Performa Turbin Savonius, Cross-Flow, CFD, Immersion Distance, Rotation Direction, Turbine Performance
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM740 Marine turbines
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Putra Dave Johannes
Date Deposited:	07 Feb 2022 04:05
Last Modified:	01 Nov 2022 04:34
URI:	http://repository.its.ac.id/id/eprint/92918

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