Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8077600 | Energy | 2014 | 8 Pages |
Abstract
A novel Rankine power cycle which uses a mixture of three hydrocarbons as working fluid is proposed to utilize the cold energy in LNG (liquefied natural gas). Process simulations and composition optimization of four schemes for the cycle are carried out. The results show that while the cycle is relatively simple, a high efficiency can be achieved. Ethylene is most appropriate for application in the mixed working fluid. The cycle, without LNG expansion, can output 1.023Â kWh of work for 1Â kmol of LNG after composition optimization. The cycle with LNG expansion can output 1.346Â kWh of work for 1Â kmol of LNG. An exergy analysis is also conducted. The results indicate that the normal heat exchanger and expander produce most of the exergy loss. A parameter analysis of the inlet and outlet pressures of the expander is carried out and the most appropriate values of the pressures are deduced.
Related Topics
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Energy (General)
Authors
Heng Sun, Hongmei Zhu, Feng Liu, He Ding,