Lifting and yellow tip characteristics of small-scale partially premixed combustor burning pipeline natural gas and liquefied natural gas

2019 ◽  
Vol 31 (7) ◽  
pp. 1214-1229
Author(s):  
Zhiguang Chen ◽  
Yangjun Zhang ◽  
Pengfei Duan ◽  
Chaokui Qin
Keyword(s):  
Cast Iron ◽  
Natural Gas ◽  
Heat Input ◽  
Liquefied Natural Gas ◽  
Small Scale ◽  
Input Rate ◽  
Partially Premixed ◽  
Wobbe Index ◽  
Copper Aluminum ◽  
Head Temperature

In this article, a small-scale partially premixed combustor was designed with 1.5 kW heat input rate. Through altering premixing ratio of gas and air, the lifting and yellow tip characteristics were experimentally tested with the burner head material of cast-iron and copper–aluminum respectively. Combined with burner head temperature influences, the lifting and yellow tip characteristics of small-scale partially premixed combustor are discussed when natural gas is substituted. It is found that when lifting and yellow tip occur, the cast-iron burner shows a slow tendency of temperature change, but the temperature of copper–aluminum burner fluctuates sharply. Yellow tip is related to gas properties and burner structure, and is more likely to appear with the increase of the Wobbe index and heavy hydrocarbon fraction, while lifting is very likely to appear when temperature fluctuates. Yellow tip characteristic can be predicted by Wobbe index, but this method is unsuitable for lifting prediction.

scholarly journals Economic assessment of heat and power generation from small-scale liquefied natural gas in Russia

2020 ◽  
Vol 6 ◽  
pp. 391-402 ◽  
Author(s):  
Pavel Tcvetkov ◽  
Alexey Cherepovitsyn ◽  
Alexey Makhovikov
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
Economic Assessment ◽  
Liquefied Natural Gas ◽  
Small Scale

Life‐cycle‐integrated thermoeconomic and enviroeconomic assessments of the small‐scale‐liquefied natural gas cold utilization systems

2019 ◽  
Vol 43 (9) ◽  
pp. 4104-4126 ◽  
Author(s):  
Baris Burak Kanbur ◽  
Liming Xiang ◽  
Swapnil Dubey ◽  
Fook Hoong Choo ◽  
Fei Duan
Keyword(s):  
Life Cycle ◽  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Small Scale

scholarly journals Impact of Liquefied Natural Gas Composition Changes on Methane Number as a Fuel Quality Requirement

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5060
Author(s):  
Szymon Kuczyński ◽  
Mariusz Łaciak ◽  
Adam Szurlej ◽  
Tomasz Włodek
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Methane Content ◽  
Fuel Quality ◽  
Engine Fuel ◽  
Simultaneous Application ◽  
Limit Value ◽  
Wobbe Index ◽  
The One ◽  
Methane Number

The one of main quality requirements of natural gas as an engine fuel is the methane number (MN). This parameter indicates the fuel’s capability to avoid knocking in the engine. A higher MN value indicates a better natural gas quality for gas engines. Natural gas with higher methane content tends to have higher MN value. This study presents analysis of deviation of liquefied natural gas (LNG) composition and its impact on LNG quality as an engine fuel. The analysis of higher hydrocarbons and nitrogen content impact on LNG parameters was considered for several samples of LNG compositions. Most engine manufacturers want to set a new, lower limit value for methane number at 80. This fact causes significant restrictions on the range of variability in the composition of liquefied natural gas. The goal of this study was to determine the combination of the limit content of individual components in liquefied natural gas to achieve the strict methane number criterion (MN > 80). To fulfill this criterion, the methane content in LNG would have to exceed 93.7%mol, and a significant part of the LNG available on the market does not meet these requirements. The analysis also indicated that the methane number cannot be the only qualitative criterion, as its variability depends strongly on the LNG composition. To determine the applicability of LNG as an engine fuel, the simultaneous application of the methane number and Wobbe index criteria was proposed.

A new approach to value creation – stranded gas resource commercialisation via low-cost small scale floating LNG projects

2018 ◽  
Vol 58 (2) ◽  
pp. 516
Author(s):  
Daein Cha
Keyword(s):  
Natural Gas ◽  
Oil And Gas ◽  
Low Cost ◽  
Production Capacity ◽  
Liquefied Natural Gas ◽  
Small Scale ◽  
New Approach ◽  
Key Stakeholders ◽  
Cost Development ◽  
Development Concept

There are ~240 discovered, but stranded, offshore gas resources within the range of ~0.5 to 5.0 trillion cubic feet (TCF) of estimated ultimate recovery (EUR) of which ~40 such fields, representing 65 TCF of EUR, resides within Australian jurisdiction. Operators are challenged to commercialise these gas resources due to several factors such as: • lack of materiality within their oil and gas resource portfolio, • remote location, and • lack of a low-cost development concept. For such resources, a predetermined low-cost, small scale (∼1.0 million tonnes per annum production capacity) floating liquefied natural gas vessel and subsea wells tie-back development concept can be deployed to achieve commercialisation. Furthermore, the following should be promoted for the adoption to commercialise such gas resources: • target breakeven liquefied natural gas (LNG) price as a key metric to confirm fit of the resource and the development concept, • innovative financing and commercial structures to be co-developed among key stakeholders to enable project development within the constraint of a target breakeven LNG price, and • differentiated LNG offtake value proposition for securing LNG offtake contracts that underpin project bankability.

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