scholarly journals Analisa Kebutuhan Batu Bara pada Unit Dryer dalam Pengeringan Pupuk NPK di PT AGS Medan

2021 ◽  
Vol 4 (1) ◽  
pp. 11
Author(s):  
Dimas Frananta Simatupang ◽  
Yunianto Yunianto ◽  
Erwin Dani Winata Sihaloho
Keyword(s):  
Rotary Dryer ◽  
Class E

<p class="E-JOURNALAbstractBody">PT. A<span lang="EN-US">GS Medan </span>merupakan <span lang="EN-US">pabrik</span> yang bergerak dalam produksi pupuk NPK yang <span lang="EN-US">s</span>alah satu produk<span lang="EN-US">nya</span>adalah formula 12.12.17<span lang="EN-US"> dengan komposisi</span> 12% unsur <span lang="EN-US">nitrogen</span>, 12% unsur <span lang="EN-US">fosfor dan</span>17% unsur <span lang="EN-US">kalium</span>. Salah satu tahap<span lang="EN-US">an</span> dalam proses pembuatan pupuk NPK yaitu proses pengeringan<em>. </em>Jenis <em>dryer</em> yang digunakan adalah <em>rotary dryer</em> dengan putaran 5 rpm dan kemiringan 20<sup>o</sup>. Pengering yang digunakan adalah udara panas yang berasal dari pembakaran batu bara <span lang="EN-US">jenis </span><em>bitminious</em> di dalam <em>furnace</em><em><span lang="EN-US">.</span></em><span lang="EN-US">Untuk menentukan jumlah batu bara yang dibutuhkan dalam proses pengeringan pupuk NPK sebagai bahan bakar </span><em><span lang="EN-US">furnace</span></em><span lang="EN-US"> maka diperlukan perhitungan jumlah panas. Pengambilan sampel, analisis kadar air dan suhu serta menghitung panas dengan prinsip neraca massa dilakukan dalam penelitian ini. </span>Berdasarkan perhitungan yang telah dilakukan untuk mengeringkan pupuk NPK dengan kapasitas pupuk NPK 7000 kg/jam dibutuhkan energi sebesar 6136<span lang="EN-US">268</span>,<span lang="EN-US">402</span>Kkal/jam. Jumlah bahan bakar yang dibutuhkan untuk mengeringkan pupuk NPK adalah sebesar 789,<span lang="EN-US">219</span>kg/jam. </p>

A High Efficiency Class-E Power Amplifier Over a Wide Power Range Using a Look-Up Table Based Dynamic Biasing Scheme

2015 ◽  
Vol E98.C (4) ◽  
pp. 377-379
Author(s):  
Jonggyun LIM ◽  
Wonshil KANG ◽  
Kang-Yoon LEE ◽  
Hyunchul KU
Keyword(s):  
Power Amplifier ◽  
High Efficiency ◽  
Look Up Table ◽  
Dynamic Biasing ◽  
Class E

Production of Recombinant Allergens Phl p 1 and Amb a 1 for Detection of Class E Immunoglobulins

2020 ◽  
Vol 46 (6) ◽  
pp. 1221-1228
Author(s):  
O. O. Mikheeva ◽  
M. A. Kostromina ◽  
D. D. Lykoshin ◽  
M. N. Tereshin ◽  
S. K. Zavriev ◽  
...  
Keyword(s):  
Recombinant Allergens ◽  
Amb A 1 ◽  
Class E

scholarly journals Wood Chip Drying through the Using of a Mobile Rotary Dryer

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1590 ◽  
Author(s):  
Angelo Del Giudice ◽  
Andrea Acampora ◽  
Enrico Santangelo ◽  
Luigi Pari ◽  
Simone Bergonzoli ◽  
...  
Keyword(s):  
Moisture Content ◽  
Power Plants ◽  
Black Locust ◽  
Thermal Power ◽  
Initial Moisture Content ◽  
Wood Chip ◽  
Wood Chips ◽  
Cocurrent Flow ◽  
Drying Process ◽  
Rotary Dryer

Drying is a critical point for the exploitation of biomass for energy production. High moisture content negatively affects the efficiency of power generation in combustion and gasification systems. Different types of dryers are available however; it is known that rotary dryers have low cost of maintenance and consume 15% and 30% less in terms of specific energy. The study analyzed the drying process of woody residues using a new prototype of mobile rotary dryer cocurrent flow. Woodchip of poplar (Populus spp.), black locust (Robinia pseudoacacia L.), and grapevine (Vitis vinifera L.) pruning were dried in a rotary drier. The drying cycle lasted 8 h for poplar, 6 h for black locust, and 6 h for pruning of grapevine. The initial biomass had a moisture content of around 50% for the poplar and around 30% for grapevine and black locust. The study showed that some characteristics of the biomass (e.g., initial moisture content, particle size distribution, bulk density) influence the technical parameters (i.e., airflow temperature, rate, and speed) of the drying process and, hence, the energy demand. At the end of the drying process, 17% of water was removed for poplar wood chips and 31% for grapevine and black locust wood chips. To achieve this, result the three-biomass required 1.61 (poplar), 0.86 (grapevine), and 1.12 MJ kgdry solids−1 (black locust), with an efficiency of thermal drying (η) respectively of 37%, 12%, and 27%. In the future, the results obtained suggest an increase in the efficiency of the thermal insulation of the mobile dryer, and the application of the mobile dryer in a small farm, for the recovery of exhaust gases from thermal power plants.

New Experimental Rotary Dryer of Olive Stone: Design, Control and Modeling

2016 ◽  
Vol 9 (3) ◽  
pp. 443-449 ◽  
Author(s):  
Francisco J. Gómez-de la Cruz ◽  
Pedro J. Casanova-Peláez ◽  
Fernando Cruz-Peragón ◽  
José M. Palomar-Carnicero
Keyword(s):  
Olive Stone ◽  
Rotary Dryer

A 3.5 GHz hybrid CMOS class E power amplifier with reverse body bias design for 5G applications

2021 ◽  
Author(s):  
Ahmad Fariz Hasan ◽  
Sohiful Anuar Zainol Murad ◽  
Faizah Abu Bakar
Keyword(s):  
Power Amplifier ◽  
Hybrid Cmos ◽  
Class E ◽  
Body Bias

scholarly journals A Class-E-Based Resonant AC-DC Converter With Inherent PFC Capability

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 46664-46673
Author(s):  
Hussein Mahdi ◽  
Ahmed M. Ammar ◽  
Yasser Nour ◽  
Michael A. E. Andersen
Keyword(s):  
Class E

scholarly journals Design of the Class-E Power Amplifier with Finite DC Feed Inductance under Maximum-Rating Constraints

2021 ◽  
Vol 11 (9) ◽  
pp. 3727
Author(s):  
Ingrid Casallas ◽  
Carlos-Ivan Paez-Rueda ◽  
Gabriel Perilla ◽  
Manuel Pérez ◽  
Arturo Fajardo
Keyword(s):  
Quality Factor ◽  
Power Amplifier ◽  
Wide Spectrum ◽  
Circuit Simulation ◽  
Percentage Error ◽  
Resonant Circuit ◽  
Mean Square ◽  
Peak Voltage ◽  
Supply Current ◽  
Class E

This paper proposes an analytical expression set to determine the maximum values of currents and voltages in the Class-E Power Amplifier (PA) with Finite DC-Feed Inductance (FDI) under the following assumptions—ideal components (e.g., inductors and capacitors with infinite quality factor), a switch with zero rise and fall commutation times, zero on-resistance, and infinite off-resistance, and an infinite loaded quality factor of the output resonant circuit. The developed expressions are the average supply current, the RMS (Root Mean Square) current through the DC-feed inductance, the peak voltage and current in the switch, the RMS current through the switch, the peak voltages of the output resonant circuit, and the peak voltage and current in the PA load. These equations were obtained from the circuit analysis of this ideal amplifier and curve-fitting tools. Furthermore, the proposed expressions are a useful tool to estimate the maximum ratings of the amplifier components. The accuracy of the expressions was analyzed by the circuit simulation of twelve ideal amplifiers, which were designed to meet a wide spectrum of application scenarios. The resulting Mean Absolute Percentage Error (MAPE) of the maximum-rating constraints estimation was 2.64%.

Sign in / Sign up

Export Citation Format

Share Document