Yu Yiping H Liu

US Patent:

20170030633, Feb 2, 2017

Filed:

Oct 14, 2016

Appl. No.:

15/293485

Inventors:

- Kanagawa, JP
- Allentown PA, US
Timothy Truong - Macungie PA, US
Yu Nan Liu - Cary NC, US

International Classification:

F25J 1/00
F25J 3/02
F25J 1/02

Abstract:

By using the power generated by an expander by an expansion of material gas, the outlet pressure of a compressor is increased, and a requirement on the cooling capacity of a cooler is reduced. The liquefaction system () for natural gas comprises a first expander () for generating power by expanding natural gas under pressure as material gas; a first cooling unit () for cooling the material gas depressurized by expansion in the first expander; a distillation unit () for reducing or eliminating a heavy component in the material gas by distilling the material gas cooled by the first cooling unit; a first compressor () for compressing the material gas from which the heavy component was reduced or eliminated by the distillation unit by using the power generated in the first expander; a second heat exchanger for exchanging heat between the material gas introduced into the first compressor and the material gas compressed by the first compressor; and a liquefaction unit () for liquefying the material gas compressed by the first compressor by exchanging heat with a refrigerant.