LNG (Liquefied Natural Gas) cold energy efficient mixed refrigerant power generation method

A technology of mixing refrigerants and refrigerants, which is applied in ocean energy power generation, machines/engines, steam engine installations, etc., and can solve problems such as complex systems and poor adjustment performance under variable working conditions of the system

Pending Publication Date: 2022-05-06
杨兆铭
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this method is composed of multiple cycles, the system is complex, and the system has poor adjustment performance under variable working conditions.

Method used

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  • LNG (Liquefied Natural Gas) cold energy efficient mixed refrigerant power generation method
  • LNG (Liquefied Natural Gas) cold energy efficient mixed refrigerant power generation method

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and this embodiment. The described specific embodiments are only used to explain the present invention, and are not intended to limit the present invention.

[0017] The LNG cold energy power generation device has the advantages of small number of equipment, large capacity, high integration, high utilization rate of LNG cold energy, high power generation efficiency, reliable equipment, convenient adjustment and strong adaptability. The device includes: Method 1, high-pressure plate fin replacement Heater + coiled tube heat exchanger mode: (1) mixed refrigerant condensing heat exchanger E2, using a high-pressure plate-fin heat exchanger with small heat transfer temperature difference and high efficiency; (2) refrigerant evaporator E1, using a coiled tube heat exchanger Heater with high reliability; low-temperature natural gas reheater E3 adopts coiled tube heat exchanger ...

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Abstract

The invention discloses a high-efficiency power generation technology capable of fully utilizing LNG (Liquefied Natural Gas) cold energy. A high-pressure mixed refrigerant is heated and gasified by seawater and then flows into a turbine inlet buffer separation tank, a high-pressure gas-phase mixed refrigerant drives a turbo expander to generate power and then depressurizes, a low-pressure gas-phase mixed refrigerant flows into a mixed refrigerant condensing heat exchanger with LNG as a cold source and enters a refrigerant pump inlet buffer separation tank after being condensed, and a liquid mixed refrigerant is pressurized by a refrigerant pump and then enters the turbine inlet buffer separation tank. And the mixed refrigerant flows back into the mixed refrigerant condensing heat exchanger as a cold source, is gasified into a high-pressure mixed refrigerant two-phase flow at an outlet of the heat exchanger and then enters a separation tank for gas-liquid separation, and a gas-phase refrigerant and a liquid-phase refrigerant respectively enter a coiled tube type refrigerant evaporator with seawater as a heat source or an ORV type evaporator for gasification and rewarming.

Description

Technical field: [0001] It belongs to the technical field of power generation. Utilize the cold energy in the LNG gasification process in the LNG receiving station or satellite station to establish a high-efficiency low-temperature Rankine power cycle power generation system method with hydrocarbon mixed refrigerant as the medium. Background technique [0002] Dozens of LNG receiving stations are built along the coast of China to receive imported LNG. The temperature of LNG under normal pressure is -162°C. my country imports tens of millions of tons of LNG each year, which carries huge cold energy. Seawater is usually used to directly heat the receiving stations. The LNG method gasifies LNG and then transports it outside, which wastes a lot of cold energy and affects the ecological environment of the surrounding sea areas. There are many ways to utilize LNG cold energy, such as air separation, ice making, power generation, cold storage, crushed rubber, and data centers, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K25/10F03G7/05F03G7/04F01D15/10
CPCF01K25/10F03G7/05F03G7/04F01D15/10Y02E10/30
Inventor 杨兆铭
Owner 杨兆铭
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