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- 저자 : Adnan Aslam Noon (검색결과 2 건)
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Qyyum, Muhammad Abdul,Wei, Feng,Hussain, Arif,Noon, Adnan Aslam,Lee, Moonyong Elsevier 2018 Applied thermal engineering Vol.144 No.-
<P><B>Abstract</B></P> <P>Liquefied natural gas (LNG) has attracted global attention as a more ecological energy source when compared to other fossil fuels. The nitrogen (N<SUB>2</SUB>) expander liquefaction is the most green and safe process among the different types of commercial natural gas liquefaction processes, but its relatively low energy efficiency is a major issue. To solve this issue, an energy-efficient, safe, and simple refrigeration cycle was proposed to improve the energy efficiency of the N<SUB>2</SUB> based natural-gas liquefaction process. In the proposed refrigeration cycle, vortex tube as an expansion device was integrated with turbo-expander in order to reduce the overall required energy for LNG production. A well-known commercial simulator Aspen Hysys® v9 was employed for modeling and analysis of proposed LNG process. The hybrid vortex-tube turbo-expander LNG process resulted in the specific energy requirement of 0.5900 kWh/kg LNG. Furthermore, the energy efficiency of the proposed LNG process was also compared with previous N<SUB>2</SUB> expander-based LNG processes. The results demonstrated that the proposed hybrid configuration saved up to 68.5% (depending on feed composition and conditions) in terms of the overall specific energy requirement in comparison with previous studies.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An innovative vortex tube based N<SUB>2</SUB> expansion refrigeration cycle. </LI> <LI> Vortex tube is hybridized with turbo-expander for LNG production. </LI> <LI> The overall energy requirement for the LNG process is reduced significantly. </LI> <LI> The proposed refrigeration cycle can be implemented to other cryogenic processes. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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