IDENTIFIKASI DAN ANALISIS MATERIAL CASING REGULATOR GAS

2021 ◽  
Vol 26 (2) ◽  
pp. 111-121
Author(s):  
Freddy Marpaung ◽  
Nyoman Artana
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Liquefied Natural Gas

Regulator gas merupakan salah satu komponen penting pada system tanki liquefied natural gas (LNG). Komponen ini didesain harus mampu bekerja pada temperature rendah ekstrim dan tekanan tinggi. Dalam keseluruhan proses desain, material memiliki peran penting sehingga designer harus dapat mengidentifikasi jenis material dengan fungsionalitas spesifik agar ditemukan konsep desain yang layak. Identifikasi material tersebut dapat digunakan sebagai informasi awal mengenai sifat mekanik dan struktur mikro dari material. Tujuan dari penelitian ini adalah menyajikan data identifikasi material casing regulator gas alam jenis Belgas P39 dan memberikan rekomendasi persyaratan material yang harus dipenuhi oleh perusahaan lokal yang tertarik untuk mengembangkan material casing regulator tersebut. Pada paper ini, identifikasi material casing regulator Belgas P39 high pressure dilakukan melalui serangkaian pengujian, diantaranya pengujian komposisi kimia, pengujian kekerasan, pengujian metalografi, dan pengujian SEM-EDS. Selanjutnya data hasil pengujian tersebut dibandingkan dengan data pembanding standar. Hasil penelitian menunjukkan bahwa material casing regulator Belgas P39 high pressure termasuk dalam paduan kuningan jenis duplex.

scholarly journals Numerical Analysis of High-Pressure Direct Injection Dual-Fuel Diesel-Liquefied Natural Gas (LNG) Engines

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 261 ◽  
Author(s):  
Alberto Boretti
Keyword(s):  
High Pressure ◽  
Steady State ◽  
Liquid Phase ◽  
Natural Gas ◽  
Power Density ◽  
Conversion Efficiency ◽  
Liquefied Natural Gas ◽  
Dual Fuel ◽  
Fuel Conversion ◽  
Better Than

Dual fuel engines using diesel and fuels that are gaseous at normal conditions are receiving increasing attention. They permit to achieve the same (or better) than diesel power density and efficiency, steady-state, and substantially similar transient performances. They also permit to deliver better than diesel engine-out emissions for CO2, as well as particulate matter, unburned hydrocarbons, and nitrous oxides. The adoption of injection in the liquid phase permits to further improve the power density as well as the fuel conversion efficiency. Here, a model is developed to study a high-pressure, 1600 bar, liquid phase injector for liquefied natural gas (LNG) in a high compression ratio, high boost engine. The engine features two direct injectors per cylinder, one for the diesel and one for the LNG. The engine also uses mechanically assisted turbocharging (super-turbocharging) to improve the steady-state and transient performances of the engine, decoupling the power supply at the turbine from the power demand at the compressor. Results of steady-state simulations show the ability of the engine to deliver top fuel conversion efficiency, above 48%, and high efficiencies, above 40% over the most part of the engine load and speed range. The novelty of this work is the opportunity to use very high pressure (1600 bar) LNG injection in a dual fuel diesel-LNG engine. It is shown that this high pressure permits to increase the flow rate per unit area; thus, permitting smaller and lighter injectors, of faster actuation, for enhanced injector-shaping capabilities. Without fully exploring the many opportunities to shape the heat release rate curve, simulations suggest two-point improvements in fuel conversion efficiency by increasing the injection pressure.

scholarly journals Application of ASME Section VIII Division 3 to Compressed Natural Gas Transport

2013 ◽  
Author(s):  
J. Robert Sims
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Gas Transport ◽  
Composite Fiber ◽  
Pressure Vessels ◽  
Liquefied Natural Gas ◽  
Compressed Natural Gas ◽  
Marine Transport ◽  
Section Viii ◽  
Natural Gas Transport

Marine transport of liquefied natural gas (LNG) is well established and extensive precedents for the design of the ships and tanks exist. Fewer precedents exist for the transport of compressed natural gas (CNG). This paper describes the application of composite (fiber) wrapped pressure vessels constructed to the requirements of ASME Section VIII Division 3, Alternative Rules for Construction of High Pressure Vessels (Division 3) to pressure vessels for marine CNG transport. Since the density of CNG is much lower than the density of LNG, efficient transport requires that the pressure vessels be as light as possible while ensuring pressure integrity. The advantages of a composite fiber wrap and of Division 3 construction for this application will be discussed. Paper published with permission.

Liquefied natural gas in China

2000 ◽  
Author(s):  
Dean Girdis ◽  
Stratos Tavoulareas ◽  
Ray Tomkins
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas

Analysis of standardization documentation in the field of liquefied natural gas

2018 ◽  
pp. 59-61
Author(s):  
V.A. Yasashin ◽  
◽  
E.S. Gadylshina ◽  
A.S. Bolotokov ◽  
◽  
...  
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas
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