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PEMODELAN WIND TURBINE ROTOR TIPE HAWT (HORIZONTAL AXIS WIND TURBINE) MENGGUNAKAN METODE VOLUME HINGGA Zahroh, Millatuz; Dafik, D; Fatahillah, Arif
KadikmA Vol 6, No 2 (2015)
Publisher : KadikmA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (444.698 KB)

Abstract. A Wind turbine is a wind energy converters tool into electrical energy. To optimize the electrical energy converted, it needs for further research on wind turbine process. In this research, the analysis part of wind turbine is rotor, which is the contacted part to the wind. Type of wind turbine that will be analyzed in this study is HAWT (Horizontal Axis Wind Turbine) type because this model is the most often used type and can produce great electrical energy. This research construct a model of the air flow field form of wind turbine rotor and solve these problems by using the finite volume method. Model simulation process will be done by using MATLAB and FLUENT software. The analysis was performed with the variation initial velocity level of wind. It is 3 m/s, 5 m/s, and 7 m/s. The simulation results showed that the velocity of rotation wind turbine rotor blade higher when the initial wind velocity increases. Beside that, the result is when the initial wind velocity of 7 m/s and 5 m/s, the velocity of rotation wind turbine rotor blade tend to be more stable. With 5 m/s of wind velocity to wind turbine rotor, The difference between an average direct calculation and a SOR iterative calculation is obtained the value of relative error less than 0.1%. it is 0.079%. So the finite volume method of numerical methods is effective to solve this problem. Key Words : Electrical Energy, Finite Volume Method, Velocity, Wind Turbine,.

PENENTUAN JENIS FUNGSI BASIS RADIAL DALAM DUAL RECIPROCITY BOUNDARY ELEMENT METHOD Zahroh, Millatuz
Majalah Ilmiah Matematika dan Statistika Vol 21 No 1 (2021): Majalah Ilmiah Matematika dan Statistika
Publisher : Jurusan Matematika FMIPA Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/mims.v21i1.23650

Problems involving modified Helmholtz equation are considered in this paper. To solve the problem numerically, dual reciprocity boundary element method (DRBEM) is employed. Some stage have been passed, using reciprocal relation to approximate boundary integral and domain integral in modified Helmholtz equation . Until, linear equation system are obtained in matrix form. MATLAB is used to calculate the solutions of Solutions of are compared between the exact solution and the numerical solution of modified Helmholtz equation. The numerical results are based on the using of three types of radial basis function to approximate domain integral, such as polinomial, poliharmonik spline and linear types. The solutions show that the polinomial and poliharmonik spline types are more stable and approach to exact solution than linear types.

PELATIHAN BUDIDAYA MAGGOT (HERMETIA ILLUCENS) SEBAGAI PEREDUKSI SAMPAH ORGANIK DAPUR DI BANK SAMPAH DESA TEMPUREJO KABUPATEN JEMBER Millatuz Zahroh; Moh. Hasan; Tri Candra Setiawati
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 6, No 11 (2023): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v6i11.4212-4223

Bank Sampah Unit Desa Tempurejo didirikan untuk mengatasi permasalahan sampah di Desa Tempurejo-Jember. Dalam mengelola sampah anorganik, bank menerima tabungan sampah dari warga kemudian dikirim ke tempat pengepul. Namun demikian, sampah organik terutama sampah organik dapur (SOD) masih belum terkelola. Jika SOD terus menumpuk, maka dapat menimbulkan bau yang tidak sedap dan juga menghasilkan gas metana yang dapat menimbulkan kerusakan lingkungan. Solusi yang dapat digagaskan untuk mendegradasi SOD dengan cepat dan efektif yaitu melalui budidaya maggot (Hermetia Illucens). Selain dapat mengurai SOD, maggot memiliki banyak kelebihan lain diantaranya tidak menularkan penyakit pada manusia, mudah dibudidayakan dan bernilai ekonomis, yaitu sebagai alternatif pakan ternak bernutrisi tinggi. Tujuan pelaksanaan program pengabdian ini adalah untuk memberikan pelatihan budidaya maggot (Hermetia Illucens) sebagai pereduksi sampah organik dapur di Bank Sampah Desa Tempurejo Kabupaten Jember. Tahapan dalam melaksanakan kegiatan ini adalah persiapan, studi tiru, pengadaan alat dan bahan, pelatihan dan sosialisasi hingga dilakukan monitoring, pendampingan serta evaluasi. Kegiatan ini telah dilaksanakan pada bulan Juli hingga November 2022.

A Literacy Program in Increasing of Reading Interest and Children Creativity at Tempurejo Village by Collaborative KKN 045 Jember Zahroh, Millatuz; Ahmad Pujiono; Ayuri Wahyu; Dhea Maulana; Andriani; Indri Ariestiana
Jurnal Inovasi Sains dan Teknologi untuk Masyarakat Vol. 2 No. 1 (2024): Mei
Publisher : Faculty of Mathematics and Natural Sciences, University of Jember. Jl. Kalimantan No.37, Krajan Timur, Jemberlor, Kec. Sumbersari, Jember Regency, East Java 68121

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/instem.v2i1.817

The Collaborative Real Work Lecture Program (KKN-K) is a form of activity carried out to provide students with learning experiences in social life so that they can help local communities and villages. The KKN-K activities carried out by KKN-K 045 students have a literacy theme called 'Gemilang' or the Inspiring Reading Movement and Brilliant Literacy. The aim of establishing Gemilang activities is to increase interest in reading and foster creativity for the children of Tempurejo Village. This literacy activity was carried out in three places, namely MI Miftahul Ulum, Al-Muna Civilization House, and TPQ Izzatul Qur'an, Tempurejo Village, Jember Regency. The method used during the activity was field observation. Through literacy development activities for the children of Tempurejo Village, especially kindergarten and elementary school age, it is hoped that this will increase their interest in reading and develop children's creativity.

PEMODELAN WIND TURBINE ROTOR TIPE HAWT (HORIZONTAL AXIS WIND TURBINE) MENGGUNAKAN METODE VOLUME HINGGA Zahroh, Millatuz; Dafik, D; Fatahillah, Arif
Kadikma Vol 6 No 2 (2015): Agustus 2015
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v6i2.1983

Abstract. A Wind turbine is a wind energy converters tool into electrical energy. To optimize the electrical energy converted, it needs for further research on wind turbine process. In this research, the analysis part of wind turbine is rotor, which is the contacted part to the wind. Type of wind turbine that will be analyzed in this study is HAWT (Horizontal Axis Wind Turbine) type because this model is the most often used type and can produce great electrical energy. This research construct a model of the air flow field form of wind turbine rotor and solve these problems by using the finite volume method. Model simulation process will be done by using MATLAB and FLUENT software. The analysis was performed with the variation initial velocity level of wind. It is 3 m/s, 5 m/s, and 7 m/s. The simulation results showed that the velocity of rotation wind turbine rotor blade higher when the initial wind velocity increases. Beside that, the result is when the initial wind velocity of 7 m/s and 5 m/s, the velocity of rotation wind turbine rotor blade tend to be more stable. With 5 m/s of wind velocity to wind turbine rotor, The difference between an average direct calculation and a SOR iterative calculation is obtained the value of relative error less than 0.1%. it is 0.079%. So the finite volume method of numerical methods is effective to solve this problem. Key Words : Electrical Energy, Finite Volume Method, Velocity, Wind Turbine,.

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