Supercritical secondary divided flow type longitudinal three-level Rankine cycle power generation system

Abstract

The invention relates to a supercritical secondary divided flow type longitudinal three-level Rankine cycle power generation system. The system comprises an LNG circulating pump and a sea water pump.The system also comprises a first-level power generation unit, a second-level power generation unit and a third-level power generation unit which are distributed successively in a longitudinal array;the first-level power generation unit comprises a first-level evaporator, a first-level turbine, a first-level condenser and a first-level working medium pump which are successively connected; the second-level power generation unit comprises a second-level evaporator, a second-level turbine, a second-level flow divider, a second-level condenser, a second-level mixer and a second-level working medium pump which are successively connected to form a closed loop; and the third-level power generation unit comprises a third-level evaporator, a third-level turbine, a third-level flow divider, a third-level condenser, a third-level mixer and a third-level working medium pump which are successively connected to form a closed loop. The supercritical secondary divided flow type longitudinal three-level Rankine cycle power generation system provided by the invention has the advantages of being simple in structure and convenient to use, and can be widely applied to the field of LNG cold energy power generation.

Description

technical field [0001] The invention relates to the technical field of LNG cold energy power generation, in particular to a supercritical secondary split vertical three-stage Rankine cycle power generation system. Background technique [0002] Natural gas has become the fastest-growing fuel in the world due to its high efficiency and cleanliness, but the liquefaction of natural gas requires a large amount of electricity. There is a huge temperature difference between the receiving terminal LNG and the ambient temperature, and there is a large amount of available cold energy. Since LNG-FSRU usually stays on the sea far away from land users, in order to smoothly transport natural gas to users through pipelines, the NG outlet pressure in the FSRU system is usually higher than the NG outlet pressure of the land IFV system. According to the LNG gas transmission pressure requirements in the United States, the long-distance transportation of natural gas must reach more than 7MPa. ...

AI Technical Summary

Problems solved by technology

[0002] Natural gas has become the fuel with the fastest growing global consumption due to its high efficiency and cleanliness, but because natural gas liquefaction requires a large amount of electricity

Images