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Structured Mathematical Modeling of Industrial Boiler Aziz, Abdullah Nur; Nazaruddin, Yul Yunazwin; Siregar, Parsaulian; Bindar, Yazid
Journal of Engineering and Technological Sciences Vol 46, No 1 (2014)
Publisher : ITB Journal Publisher, LPPM ITB

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Abstract

As a major utility system in industry, boilers consume a large portion of the total energy and costs. Significant reduction of boiler cost operation can be gained through improvements in efficiency. In accomplishing such a goal, an adequate dynamic model that comprehensively reflects boiler characteristics is required. This paper outlines the idea of developing a mathematical model of a water-tube industrial boiler based on first principles guided by the bond graph method in its derivation. The model describes the temperature dynamics of the boiler subsystems such as economizer, steam drum, desuperheater, and superheater. The mathematical model was examined using industrial boiler performance test data.It can be used to build a boiler simulator or help operators run a boiler effectively.
ALIH TEKNOLOGI PEMBUATAN TEROPONG BINTANG SEDERHANA UNTUK KEPERLUAN RU’YATUL HILAL BAGI REMAJA MASJID Sehah, -; Aziz, Abdullah Nur; Effendi, Mukhtar
Jurnal Fisika Vol 4, No 2 (2014)
Publisher : Jurnal Fisika

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Abstract

Kegiatan Pengabdian Kepada Masyarakat (PKM) Program Penerapan IPTEKS yang berjudul “Alih Teknologi Pembuatan Teropong Bintang Sederhana untuk Keperluan Ru’yatul Hilal bagi Remaja Masjid” telah dilakukan di Masjid Baitussalam Desa Kebarongan, Kecamatan Kemranjen, Kabupaten Banyumas. Tujuan kegiatan adalah melakukan alih teknologi teknis pembuatan teropong bintang sederhana bagi Remaja Masjid. Metode yang digunakan dalam kegiatan ini adalah ceramah, diskusi, dan praktek. Setelah dilakukan alih teknologi, sebagian besar peserta memberikan respons positif terhadap kegiatan PKM ini dan terdapat keinginan cukup kuat untuk menerapkan dan menyebarluaskan. Indeks capaian rata-rata keberhasilan kegiatan ini berdasarkan monitoring menggunakan kuisioner adalah 78,69%, dengan indeks capaian tertinggi 96,43% dan indeks capaian terendah 60,71%. Tingkat pemahaman peserta kegiatan PKM terhadap materi alih teknologi dan sosialisasi yang diberikan cukup optimal. Hal ini terlihat dari hasil rekapitulasi nilai pre-test maupun post-test, dimana nilai rata-rata pre-test adalah 4,95, sedangkan nilai rata-rata post-test adalah 7,86. Berdasarkan nilai-nilai yang diperoleh tersebut, terdapat kenaikan nilai pre-test ke post-test sebesar 58,58% yang menunjukkan bahwa penyerapan materi PKM oleh peserta sesuai dengan yang diharapkan
Basic Principle Application and Technology of Boron Neutron Capture Cancer Therapy (BNCT) Utilizing Monte Carlo N Particle 5’S Software (MCNP 5) with Compact Neutron Generator (CNG) Payudan, Aniti; Aziz, Abdullah Nur; Sardjono, Yohannes
Indonesian Journal of Physics and Nuclear Applications Vol 1 No 1 (2016)
Publisher : Fakultas Sains dan Matematika Universitas Kristen Satya Wacana

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Abstract

The purpose are to know basic principle, needed component, types of compact neutron generator, plus and minus CNG, identify materials can use as collimator, know physics parameters as input software MCNP 5, knowing step simulation with software MCNP 5, dose in BNCT, knowing boron compound that use in BNCT, getting collimator design for BNCTS application with source is compact neutron generator and count physics parameter of collimator output and compares it with standard IAEA. Method are reading reference and simulation with MCNP 5. The result are BNCT use high linear energy transfer from alpha and lithium as a result of 10B(n,α)7Li reaction. BNCT method is effective for cancer therapy. It is not dangerous to normal tissues. To work perfectly, BNCT needs neutron, boron (BSH and BPA as boron compound) Indonesia have study turmeric as boron compound, neutron source, collimator and dose. Dose component in BNCT that important are dose of recoil proton, dose of gamma, dose alfa and dose radiation to environmentally. CNG produce neutron with fussion reaction of deuterium-deuterium (2,45 MeV), deuterium-tritium (14 MeV), tritium-tritium(11,31 MeV) can used as neutron source BNCT. Many kinds of CNG are axial, coaxial, toroidal, plasma design, accelerator design, and CNG with diameter 2,5 cm. CNG have more benefit than another neutron source, make CNG compatible as BNCT application. Neutron from CNG need collimator to get neutron as IAEA’s parameter.  Material for collimator are wall and aperture (material: Ni, Pb, Bi), moderator (Al, Al2O3, S, AlF3), filter (6Li,10B, LiF, Al, Cd-nat,  Ni-60, BiF3, 157Gd, 151Eu), gamma shield (Bi, Pb). Simulation using MCNP 5 has severally steps, the first is sketching problem, the second is making listing program with notepad, the third open program on visual editor, and the last is running program. Acquired result is design tube collimator with radius 71 cm and high 139, 5 cm. Design contained on lead wall as thick as 19, 5 cm; moderate: heavy water as thick as 4 cm, AlF3 girdle a half of part CNG, MgF 2 (19 cm + 10 cm), Al (6,5 cm + 5 cm);Gamma shield: bismuth, and aperture with diameter 6 cm by steps aside nickel. The result collimator output cross three of five IAEAS defaults. They are the ratio among dosed gamma with flux epithermal is 5,738×10 -24Gy. cm 2 .n -1, the value of ratio among thermals neutron flux with epithermal neutron is 0, 02567, and ratio among current with flux neutron completely is 1, 2. Need considerable effort of all part to realize BNCT in Indonesia.
Studi Analisis Sifat Dielektrik Tanah dengan Variasi Porositas Pada Frekuensi Resonansi Rendah Sehah, Sehah; Aziz, Abdullah Nur
Jurnal Fisika FLUX Vol 6, No 2 (2009): Jurnal Fisika Flux Edisi Agustus 2009
Publisher : Lambung Mangkurat University Press

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Abstract

The equipment to measure dielectric properties of soil samples withlissajous method has been designed in Electronic and InstrumentationsLaboratory, Faculty of Science and Technique, Jenderal Soedirman University,Purwokerto. The fundamental parts of this equipment are signal generator,cathode ray oscilloscope (CRO) and parallel plate. Thus, the soil samples whichbe researched is placed in zone between parallel plate, as dielectric material. Ifsignal generator supply electric field into the parallel plate, hence response ofsamples to electric field is shown with voltages values on oscilloscope (CRO).Based on this voltages values, so that can be calculated a dielectric permittivity,dielectric loss and tangent loss of soil samples. The number of samples thatmeasured its dielectric properties are three samples, which contains of top soil,smooth sand of river, and sediments rocks. The measurement to dielectricproperties with variation of porosity is done to samples at low resonancefrequency of 600 kHz and 2,75 MHz. The results which obtained show that alinear relation between dielectric constant of soil samples to its porosity, but withempirical equations different for every samples.
PENDUGAAN KEDALAMAN AIR TANAH MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DI DESA BOJONGSARI, KECAMATAN ALIAN, KABUPATEN KEBUMEN Sehah, Sehah; Aziz, Abdullah Nur
Jurnal Neutrino Vol 8, No 2. APRIL (2016): JURNAL NEUTRINO
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

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Abstract

Pendugaan kedalaman air tanah di Desa Bojongsari, Kecamatan Alian, Kabupaten Kebumen menggunakan metode Geolistrik konfigurasi Schlumberger telah dilaksanakan pada tanggal 9 Oktober 2015. Pengukuran geolistrik dilaksanakan dengan cara menginjeksikan arus listrik ke dalam bumi dan mengukur beda potensial yang terjadi di tiga titik lokasi yaitu Bojongsari 01, Bojongsari 02, dan Bojongsari 03. Pengolahan data dan pemodelan dilakukan hingga diperoleh data resistivitas yang merepresentasikan jenis-jenis lapisan batuan bawah permukaan di daerah penelitian. Pada titik Bojongsari 01 lapisan akuiferair tanah dangkal diperkirakan tersusun atas pasir berbutir halus (0,85 Wm) dengan kedalaman 7,35–10,78 m dan lempung pasiran (13,25 Wm) dengan kedalaman 10,78–29,44 m, sedangkan lapisanakuifer dalam tersusun atas pasir berbutir halus (0,44 Wm) pada kedalaman 33,72 – 85,76 m. Pada titik Bojongsari 02 lapisan akuifer dangkal diperkirakan tersusun atas lempung pasiran (19,43 Wm) pada kedalaman 7,61–26,65 m dan pasir lempungan (3,18 Wm) pada kedalaman 26,65–43,32 m, sedangkan lapisan akuifer dalam tersusun atas pasir lempungan (5,97 Wm) pada kedalaman 53,94 m. Pada titik Bojongsari 03 lapisan akuifer dangkal diperkirakan tersusun atas pasir berbutir halus (1,18 Wm) dengan kedalaman 11,28–38,25 m, sedangkan lapisan akuifer dalam tersusun atas lempungpasiran berbutir kasar (28,02 Wm) dengan kedalaman 77,25 m. Berdasarkan hasil pemodelan di atas, lapisan akuifer yang diperkirakan paling cocok dimanfaatkan untuk proyek pengadaan air bersih di Desa Bojongsari, Kecamatan Alian, Kabupaten Kebumen adalah lapisan akuiferair tanah dalam untuk titik Bojongsari 01.