scholarly journals Pemodelan dan Simulasi Pencairan Gas Alam dengan Persamaan Keadaan Peng Robinson

2021 ◽  
Vol 4 (1) ◽  
pp. 18
Author(s):  
Lidya Elizabeth ◽  
Okky Indra Putra ◽  
Marthen Luther Doko
Keyword(s):  

<p class="E-JOURNALBody">Gas alam merupakan energi <span lang="EN-US">yang </span>ramah lingkungan<span lang="EN-US"> dibandingkan batu</span><span lang="EN-US">bara dan minyak bumi</span>. <span lang="EN-US">Pencairan gas alam memudahkan pengangkutan pada jarak jauh. Tujuan pemodelan dan simulasi pencairan gas alam ini yaitu mengetahui pengaruh temperatur dan tekanan pada masukan kompresor. Simulasi dilakukan secara statis dan dinamis. </span>Metode simulasi pencairan gas alam <span lang="EN-US">menggunakan perangkat </span>Matlab dengan persamaan keadaan Peng Robinson dan aturan campuran (<em>mixing rules</em>). Pemodelan stati<span lang="EN-US">s</span><span lang="EN-US">dilakukan pada t</span>emperatur masukan gas alam 298 K dan tekanan 20 atm. Hasil simulasi menunjukkan gas alam mengalami pencairan pada siklus kedua. <span lang="EN-US">T</span>emperatur gas alam <span lang="EN-US">siklus pertama mencapai 1</span>82 K<span lang="EN-US"> sedangkan </span>kedua 112 K.<span lang="EN-US"> Pemodelan dinamis memvariasikan temperatur masukan kompresor pada komposisi gas alam tetap dan variasi komposisi gas metana pada temperatur masukan kompresor tetap. Hasil menunjukkan semakin tinggi temperatur masukan kompresor</span>,<span lang="EN-US"> semakin tinggi temperatur keluaran kompresor akhir dan <em>throttling valve</em>. Pada variasi komposisi gas metana, semakin besar komposisi gas metana maka semakin rendah suhu keluaran kompresor.</span></p>

2015 ◽  
Vol E98.C (4) ◽  
pp. 377-379
Author(s):  
Jonggyun LIM ◽  
Wonshil KANG ◽  
Kang-Yoon LEE ◽  
Hyunchul KU

2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Viorel Feroiu ◽  
Dan Geana ◽  
Catinca Secuianu

Vapour � liquid equilibrium, thermodynamic and volumetric properties were predicted for three pure hydrofluorocarbons: difluoromethane (R32), pentafluoroethane (R125) and 1,1,1,2 � tetrafluoroethane (R134a) as well as for binary and ternary mixtures of these refrigerants. Three cubic equations of state GEOS3C, SRK (Soave � Redlich � Kwong) and PR (Peng � Robinson) were used. A wide comparison with literature experimental data was made. For the refrigerant mixtures, classical van der Waals mixing rules without interaction parameters were used. The GEOS3C equation, with three parameters estimated by matching several points on the saturation curve (vapor pressure and corresponding liquid volumes), compares favorably to other equations in literature, being simple enough for applications.


2020 ◽  
Vol 46 (6) ◽  
pp. 1221-1228
Author(s):  
O. O. Mikheeva ◽  
M. A. Kostromina ◽  
D. D. Lykoshin ◽  
M. N. Tereshin ◽  
S. K. Zavriev ◽  
...  

2021 ◽  
Author(s):  
Ahmad Fariz Hasan ◽  
Sohiful Anuar Zainol Murad ◽  
Faizah Abu Bakar

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

2021 ◽  
Vol 11 (9) ◽  
pp. 3727
Author(s):  
Ingrid Casallas ◽  
Carlos-Ivan Paez-Rueda ◽  
Gabriel Perilla ◽  
Manuel Pérez ◽  
Arturo Fajardo

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%.


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