As Natio Lasman
Nuclear Energy Regulatory Agency (BAPETEN) Republic of Indonesia

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Correlation Equations of Heat Transfer in Nanofluid Al2O3-Water as Cooling Fluid in a Rectangular Sub Channel Based CFD Code Ramadhan, Anwar Ilmar; Lasman, As Natio; Septilarso, Anggoro
International Journal of Science and Engineering Vol 8, No 2 (2015)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1085.853 KB) | DOI: 10.12777/ijse.8.2.120-124

Abstract

Safety is a major concern in the design, operation and development of a nuclear reactor. One aspect of nuclear reactor safety factor is thermal-hydraulics aspect. In a PWR-type nuclear power plant has been used lighter fluid coolant is water or H2O. In this research, using nanofluid Al2O3-Water with volume fraction of (1%), (2%) and also (3%), used as a cooling fluid in a nuclear reactor core with sub channel PWR fuel element rectangular arrangement. This research was carried out modeling of fuel elements are arranged rectangular, then performed numerical simulations using Computational Fluid Dynamics (CFD) code. In order to obtain the characteristic pattern of flow velocity of each fluid, the fluid temperature distribution along the cylinder wall temperature distribution of the fuel element. Then analyzed the heat transfer in a nuclear reactor core with sub channel PWR fuel element rectangular arrangement, including heat transfer coefficient, Nusselt number (Nu), as well as heat transfer correlations. Heat transfer correlation for nanofluid Al2O3-Water (1%), (2%) and also (3%) proved to core of PWR nuclear reactor fuel element sub channel rectangular arrangement with the Reynolds number (Re) is stretched, namely: 404 096 <Re <423 084 and with constant heat flux is 2600 W / m2, and the composition ratio (pitch / diameter) 1.33.
Optimasi Perancangan Sistem Solar Cell Sebagai Sumber Energi Untuk Penggerak Pompa Air Di Daerah Pertanian Desa Karangsari Kecamatan Pakanjenjeng Garut Jaelani, Otong; Lasman, As Natio
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol 8 No 1 (2018): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

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Abstract

Dalam pemanfaatan energi surya digunakan modul solar sell untuk mengkonversikan secara langsungenergi surya menjadi energi listrik, selanjutnya energi listrik tersebut digunakan untuk menggerakan pompaair yang pemanfaatannya untuk pertanian. Salah satu factor yang mempengaruhi daya optimal pada modulsolar cell adalah iklim dan sudut kemiringan modul solar cell. Penelitian ini mengkaji secara eksperimentalpengaruh dari sudut kemiringan modul solar cell (?), sudut jam optimal (?) dan jumlah hari (n). Dalampengujianya dilakukan 2 tahapan yaitu pengujian mengikuti pergerakan arah matahari dari sudut 75o ? 0o dansudut tetap kemiringan modul solar cell 20o dan 15o.Hasil eksperimen dan dianalisa dengan menggunakan metode full factorial menujukan bahwa sudutkemiringan modul solar cell yang optimal 20o dengan sudut jam optimal 16o dan jumlah hari 300 , denganintensitas radiasi matahari 1054,99 W/m2, sedangkan intensitas matahari yang paling minimum yaitu padasudut kemiringan modul solar cell 15o dengan sudut jam optimal 17o dan jumlah hari 301 besarnya radiasimatahari 1040,86 W/m2.