scholarly journals Comparison of the safety-related physical and combustion properties of liquid hydrogen and liquid natural gas in the context of the SF-BREEZE high-speed fuel-cell ferry

2017 ◽  
Vol 42 (1) ◽  
pp. 757-774 ◽  
Author(s):  
L.E. Klebanoff ◽  
J.W. Pratt ◽  
C.B. LaFleur
Keyword(s):  
Fuel Cell ◽  
Natural Gas ◽  
High Speed ◽  
Liquid Hydrogen ◽  
Combustion Properties ◽  
Liquid Natural Gas

The Influence of Elliptical Nozzle Holes on Ignition and Combustion of Transient Natural Gas Jets

2009 ◽  
Author(s):  
David Wager ◽  
James S. Wallace
Keyword(s):  
Natural Gas ◽  
Heat Release ◽  
High Speed ◽  
Combustion Products ◽  
Combustion Efficiency ◽  
Mixing Enhancement ◽  
Gas Jets ◽  
Combustion Properties ◽  
Performance And Emissions ◽  
Release Data

Experiments were conducted to compare the mixing and combustion properties of natural gas jets issuing from elliptical and round nozzle holes within an optically accessible combustion bomb. High speed images of combustion events were captured and analyzed along with cylinder pressure and heat release data. Hydrocarbon measurements of the combustion products were used to calculate combustion efficiencies. The elliptical nozzle holes were found to produce a more evenly distributed heat release profile, with a smoother transition from premixed to diffusion burning. The elliptical nozzle jets also produced far more luminous flames. Ignition delay and combustion efficiency were not found to vary significantly with nozzle design. The use of elliptical nozzles as a method of mixing enhancement for gaseous engine fuels remains potentially viable, although further work is necessary to fully quantify the performance and emissions impacts.

Thermodynamic, exergetic, and thermoeconomic analyses of a 1-kW proton exchange membrane fuel cell system fueled by natural gas

Energy ◽  
2020 ◽  
pp. 119362
Author(s):  
Seok-Ho Seo ◽  
Si-Doek Oh ◽  
Jinwon Park ◽  
Hwanyeong Oh ◽  
Yoon-Young Choi ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Natural Gas ◽  
Proton Exchange Membrane ◽  
Cell System ◽  
Proton Exchange ◽  
Fuel Cell System ◽  
Exchange Membrane

scholarly journals A novel hybrid liquefied natural gas process with absorption refrigeration integrated with molten carbonate fuel cell

2021 ◽  
Author(s):  
Mehdi Mehrpooya ◽  
Parimah Bahramian ◽  
Fathollah Pourfayaz ◽  
Hadi Katooli ◽  
Mostafa Delpisheh
Keyword(s):  
Energy Consumption ◽  
Fuel Cell ◽  
Natural Gas ◽  
Hybrid System ◽  
Liquefied Natural Gas ◽  
Molten Carbonate Fuel Cell ◽  
Cooling Load ◽  
Absorption Refrigeration ◽  
Molten Carbonate ◽  
Carbonate Fuel Cell

Abstract The production of liquefied natural gas (LNG) is a high energy-consuming process. The study of ways to reduce energy consumption and consequently to reduce operational costs is imperative. Toward this purpose, this study proposes a hybrid system adopting a mixed refrigerant for the liquefaction of natural gas that is precooled with an ammonia/water absorption refrigeration (AR) cycle utilizing the exhaust heat of a molten carbonate fuel cell, 700°C and 2.74 bar, coupled with a gas turbine and a bottoming Brayton super-critical carbon dioxide cycle. The inauguration of the ammonia/water AR cycle to the LNG process increases the cooling load of the cycle by 10%, providing a 28.3-MW cooling load duty while having a 0.45 coefficient of performance. Employing the hybrid system reduces energy consumption, attaining 85% overall thermal efficiency, 53% electrical efficiency and 35% fuel cell efficiency. The hybrid system produces 6300 kg.mol.h−1 of LNG and 146.55 MW of electrical power. Thereafter, exergy and sensitivity analyses are implemented and, accordingly, the fuel cell had an 83% share of the exergy destruction and the whole system obtained a 95% exergy efficiency.

Blast-resistant buildings for Australia's North-West shelf liquid natural gas plant

1990 ◽  
Vol 9 (1-4) ◽  
pp. 175-197
Author(s):  
C. Turnell ◽  
N.W. Murray ◽  
I.D. Bennetts
Keyword(s):  
Natural Gas ◽  
North West ◽  
Liquid Natural Gas
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