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Optimasi Tungku Sekam Skala Industri Kecil Dengan Sistem Boiler

BERKALA FISIKA Vol 13, No 3 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Rice husk furnace  is a technology based on local wisdom to anticipate threats crisis energy. At first investigated husk stoves for cooking only in the scale of the household, but today rice husk furnace developed for industrial scale because of the importance of commercial aspects of a very promising from this rice husk furnace. In rice husk furnace also developed an industrial scale boiler system, boiler systems where it can enlarge its efficiency, in the midst of a boiler chimney pots have used, because basically rice husk furnace process is influenced by air flow. Husk furnace efficiency greatly affect the number of furnace ash which is required in the cooking process.   Keywords: rice husk, rice husk furnaces, air flow, efficiency, boilers.

Studi Konduktivitas Listrik Film Tipis Ba0.25Sr0.75TiO3 Yang Didadah Ferium Oksida (BFST) Menggunakan Metode Chemical Solution Deposition

BERKALA FISIKA Vol 13, No 1 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Has done growth Ba0,25Sr0, 75TiO3 (BST) thin film and BST are pure Ferium Oxide Fe2O3 dopant (BFST) with dopant variations 5%, 10% and 15% above the substrate Si (100) type-p using Chemical Solution Deposition Method (CSD) with the spin coating technique at a speed of around 3000 rpm for 30 seconds. BST thin films made with 1 M concentration and annealing at a temperature of 850°C for Si Substrate. Thin film on silicon substrate type-p thickness characterization performed using the volumetric method and the characterization of electrical conductivity by using LCR meter. From the characterization results showed the thickness increases with the addition of ferium oxide dopant given. Electrical conductivity value of BST and BFST thin films are in the range semiconductor materials and electrical conductivity values obtained increased when the higher intensity light is used whereas resistance value could decrease if the light intensity is increased. The addition of ferium oxide dopant will increases electrical conductivity value of BST and BFST thin films.   Keywords : BFST, thin film, CSD, spin coating, electrical conductivity

Kajian Proses Sterilisasi Media Jamur Tiram Putih Terhadap Mutu Bibit Yang Dihasilkan

BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Sterilization media were done in drum. Fuels LPG.is used for the fuel Efficiencies of the fuel gained in the media sterilization oyster mushrooms for 6 hours is 40.74%, meanwhile efficiencies of the fuel for 8 and 10 hours is 59.57% and 53.14%. The physical and economical research of the white oyster mushrooms sterilization process for 8 hours produces the highest efficiency.   Keywords: Medium, oyster mushrooms, LPG, sterilization 

Kajian Hasil Pembuatan Tiga Macam Ukuran Lubang Berbentuk Persegi Panjang Pada Tubuh Tungku Sekam

BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus
Publisher : BERKALA FISIKA

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Abstract

Husk furnace is used for cooking fuel chaff with the aid of air flow in the furnace. One measurement of the husk furnace efficiency can be studied by varying the size of the primary air holes on the body of the furnace. In this study, a hole measuring 22 cm X 24 cm obtained by the rate of fuel consumption of 6.03 kg / hour of heat energy needed to boil water as much as 6 liters is 2575.00 kcal / h and 14.32% efficiency furnace. While in the hole measuring 22 cm X 8 cm and 22 cm X 16 cm, respectively 12.92% and 12.87% efficiency furnace, not significantly different.   Keywords: chaff, husk furnace, ukuruan primary air hole, furnace efficiency

Uji Sifat Listrik Film Tipis LiTao3 dan LiTaFe2O3

BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus
Publisher : BERKALA FISIKA

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Abstract

Lithium Tantalat (LiTaO3) pure and LF Thin films has been done is cube-shaped Ferium Oxide Fe2O3 (LFT) with a cube-shaped variation 0%, 2.5%, 5% and 7.5% above the substrate Si (100) p-type using a chemical solution deposition (CSD) method  by spin coating technique at 3000 rpm rotational speed for 30 seconds. LF Thin films made with 1 M concentration and annealing at a temperature of 850 ° C for Si substrates. Thin films on p-type silicon substrates were characterized thickness using volumetric method, characterization conductance by using LCR meter, test the current-voltage characterization (IV curve) using Keithley Meter IV model 2400, characterization of dielectric constants and time constants using the oscilloscope and function generator and pyroelectric characterization using Wetsteind bridge circuit which in furnace (combustion) to a temperature of 1300C by calculating the increase in temperature variation. From the characterization results indicate thickness thickness increases with the number pendadah ferium given oxide. IV characterization results showed that LF and LFT thin film is a dielectric resistor.Hasil are contained in a thin film on p-type silicon substrate varies in accordance with the addition pendadah used were 0%, 2.5%, 5% and 7.5%.  Keywords: LF, LFT, thin film, CSD, spin coating, annealing, cube-shaped, thickness, dielectric constant, time constant-voltage current, ferium oxides, pyroelectric. 

Kajian Efisiensi Energi Proses Penyulingan Dan Sifat Fisik Hasil Penyulingan Minyak Serai Dapur Menggunakan Tungku Sekam Dan Heating Mantel

BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus
Publisher : BERKALA FISIKA

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Abstract

Essential oil distillation has been carried out from the lemongrass material using two heaters there are rice husk and heating mantel. In comparison ingredients (lemongrass: water = 0.125 kg: 0.5 liters) distillation with rice husk heater requires energy 6022.5 kcal, 3660 second distillation time, costs Rp 912.5 with an average rendemen of oil produced 0.0635 %. Distillation with the same material amount using heating mantel requires the energy 832.143 Kcal, distillation time 6990 seconds, the cost Rp 608.6 and producing the rendemen 0.114%. Distillate debit is influenced by the heat generated which produced by the rice husk and heating mantel. The quality of lemongrass oil which produced by the rice husk heating is better than the heating mantel in term of the lemongrass oil color and oil refractive index. Lemongrass oil which is produced by the pale brown of heating rice husk and refractive index values were in the range of 1.4830 to 1.4890. Keywords: rice husk, heating mantel, distillation, lemongrass oil, energy.

Tungku Sekam Sebagai Bahan Bakar Alternatif Pada Sterilasasi Media Jamur Tiram

BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus
Publisher : BERKALA FISIKA

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Abstract

Medium Sterilization which has been packaged in the baglog on the oyster mushroom cultivation, one of them can be done with a steam technique using the drum. Commonly used fuel is firewood that could be assisted by using coal or kerosene or LPG gas. Rice husk as alternative fuel of kerosene and firewood can be used as fuel for the medium sterilization. The husk which used in the sterilization process of oyster mushrooms medium for 6 hours, 8 hours, and 10 hours as much as 55.5 kg, 60 kg and 67 kg. The efficiency which obtained in the medium sterilization of oyster mushrooms with using rice husk is reached 45.23% in the medium sterilization for 8 hours.   Keywords: Medium, oyster mushrooms, rice husk, sterilization

Penerapan Film Tipis Ba0.25Sr0.75TiO3 (BST) Yang Didadah Ferium Oksida Sebagai Sensor Suhu Berbantukan Mikrokontroler

BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus
Publisher : BERKALA FISIKA

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Abstract

Ferroelectric material originating from Barium Strontium Titanate (BST), is expected to have high energy because it has a dielectric constant and high charge storage capacity [6]. Materials produced by the process of ferium dopan, it is hoped will be a temperature sensor. If, materials BST and BFST (Barium Ferium Strontium Titanate) subjected to the temperature (material change that temperature), and the resulting voltage, then this material can be applied as a temperature sensor using a microcontroller. Microcontroller that used is ATMega 8535 with internal ADC. Voltage was generated, will be reinforced with a voltage amplifier (OpAmp) and will be processed into digital data at the ATMega8535 internal ADC (Analog Digital Converter).Incoming digital data will be processed and displayed in the view Microcontroller-based desktop applications Delphi 7. The material to be tested is material BST, BFST 5%, and BFST 15%.   Keyword: BST, Temperature sensor, ATMEGA 8535, ADC, Delphi 7

Electrical Properties of Photodiode Ba0.25Sr0.75TiO3 (BST) Thin Film Doped with Ferric Oxide on p-type Si (100) Substrate using Chemical Solution Deposition Method

Atom Indonesia Vol 37, No 3 (2011): December 2011
Publisher : PPIKSN-BATAN

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Abstract

In this paper we have grown pure Ba0.25Sr0.75TiO3 (BST) and BST doped by Ferric Oxide Fe2O3 (BFST) with doping variations of 5%, 10%, and 15% above type-p Silicon (100) substrate using the chemical solution deposition (CSD) method with spin coating technique at rotation speed of 3000 rpm, for 30 seconds. BST thin film are made with a concentration of 1 M 2-methoxyethanol and annealing temperature of 850oC for the Si (100) substrate. Characterization of the thin film is performed for the electrical properties such as the current-voltage (I-V) curve using Keithley model 2400 as well as dielectric constant, time constant, pyroelectric characteristics, and depth measurement. The results show that the thin film depth increases if the concentration of the Ferric Oxide doping increases. The I-V characterization shows that the BST and BFST thin film has photodiode properties. The dielectric constant increases with the addition of doping. The maximum dielectric constant value is obtained for 15 % doping concentration namely 83.1 for pure BST and 6.89, 11.1, 41.63 and 83.1, respectively for the Ferric Oxide doping based BST with concentration of 5%, 10%, and 15%. XRD spectra of 15% of ferric oxide doped BST thin film tetragonal phase, we carried out the lattice constant were a = b = 4.203 Å; c = 4.214 Å; c/a ratio = 1.003. Received: 01 February 2010; Revised: 04 October 2011; Accepted: 02 November 2011

PENGARUH VARIASI FREKUENSI, BEBAN DAN TEGANGAN TERHADAP GELOMBANG KOTAK PADA DESAIN SENSOR KAPASITANSI

Prosiding Semnastek PROSIDING SEMNASTEK 2014
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Tujuan  penelitian  ini  adalah  melihat  pengaruh  variasi  frekuensi,  beban  dan  tegangan  terhadapoutput  gelombang  kotak  yang  dihasilkan  pada  rangkaian  sensor  kapasitansi  .  Pada  penelitian  inibeban R3 dan R5 dimodelkan seri dengan variasi yang berbeda 10 dan 56 Kohm,  tegangan diubahubah dari 0, 5 dan 10 Volt, dan frekuensi input bervariasi 1 Hz dan 50 Hz. Hasil terbaik diperolehsaat beban 56 Kohm, frekuensi  50 Hz dan tegangan 0 volt dan 5 volt.  Sedangkan pada beban 10Kohm, frekuensi 50 Hz dan tegangan 10 volt, output yang dihasilkan adalah gelombang sin bukangelombang kotak.