Unlock instant, AI-driven research and patent intelligence for your innovation.

Multi-stage LNG cold energy power generation and comprehensive utilization system and method

A technology of cold energy and cycle power generation, applied in the field of comprehensive utilization of LNG, can solve the problems of high temperature of waste heat source, low utilization rate of cold energy, low heat exchange efficiency, etc., achieve significant economic and social benefits, and realize thermoelectric conversion , the effect of high-efficiency thermoelectric conversion

Pending Publication Date: 2020-03-27
青岛中稷龙源能源科技有限公司
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system uses a heat exchanger to directly exchange heat and liquefy the mixed working fluid with LNG. The heat exchanger is large and does not perform heat exchange according to the temperature gradient. The heat exchange efficiency is low, which ultimately leads to low overall heat transfer efficiency and low energy utilization. Low
In addition, it is impossible to realize the comprehensive utilization of LNG cold energy
At the same time, the type of mixed working medium and the proportion of working medium provided by the patent are different
[0009] Although there are some patents and technologies that can realize LNG cold energy power generation, most systems have problems such as complex power generation system, low utilization rate of cold energy, high temperature of waste heat source and low power generation per unit of cold energy.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-stage LNG cold energy power generation and comprehensive utilization system and method
  • Multi-stage LNG cold energy power generation and comprehensive utilization system and method
  • Multi-stage LNG cold energy power generation and comprehensive utilization system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] This embodiment provides a figure 1 In the comprehensive utilization system, the comprehensive utilization system includes a primary cycle power generation unit and a secondary cycle power generation unit.

[0097] The primary cycle power generation unit includes a first electric energy conversion device 10 , a first heat exchange device 1 , a first booster device 13 and a third heat exchange device 3 which are sequentially connected in a cycle along the flow direction of the circulating working fluid. The circulating working medium enters the first heat exchanging device 1 to exchange heat with LNG after performing work and generating electricity in the first electric energy conversion device 10, and the circulating working medium after heat exchange is pumped into the third heat exchanging device 3 and The refrigerant transported by the user needs to be cooled for heat exchange, and the heat-exchanged circulating working fluid enters the first electric energy conversi...

Embodiment 2

[0103] This embodiment provides a figure 2 In the comprehensive utilization system, the comprehensive utilization system includes a primary cycle power generation unit and a secondary cycle power generation unit.

[0104] The primary cycle power generation unit includes a first electric energy conversion device 10 , a first heat exchange device 1 , a first booster device 13 , a second heat exchange device 2 and a third heat exchange device 3 which are sequentially connected in circulation along the flow direction of the circulating working fluid. The circulating working medium enters the first heat exchanging device 1 to exchange heat with LNG after performing power generation in the first electric energy conversion device 10, and the circulating working medium after heat exchange is pumped into the second heat exchanging device 2 through the first booster device 13, The circulating working medium enters the third heat exchange device 3 after the second heat exchange in the s...

Embodiment 3

[0110] This embodiment provides a image 3 In the comprehensive utilization system shown, the comprehensive utilization system includes a primary cycle power generation unit and a secondary cycle power generation unit.

[0111] The primary cycle power generation unit includes a first electric energy conversion device 10 , a first heat exchange device 1 , a first booster device 13 , a second heat exchange device 2 and a third heat exchange device 3 which are sequentially connected in circulation along the flow direction of the circulating working fluid. The circulating working medium enters the first heat exchanging device 1 to exchange heat with LNG to cool down after performing power generation in the first electric energy conversion device 10, and the circulating working medium after heat exchange is sent to the second heat exchanging device 2 through the first supercharging device 13, In the second heat exchange device 2, heat is exchanged with part of the circulating worki...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a multi-stage LNG cold energy power generation and comprehensive utilization system and method. The system comprises at least two stages of circulating power generation units, wherein the circulating power generation unit comprises an electric energy conversion device, an LNG heat exchange device and a secondary refrigerant heat exchange device which are sequentially and circularly connected in the flowing direction of a circulating working medium, wherein the LNG heat exchange devices in all the stages of circulating power generation units are sequentially connected inthe LNG flow direction to form an LNG heat exchange channel. The invention provides a multi-working-medium multi-cycle LNG cold energy utilization power generation system capable of adopting an ultralow-temperature heat source. The system is advantaged in that LNG cold energy can be effectively recycled, multi-stage heat exchange is conducted in the heat exchange device through multiple working media and multiple cycles, heat transfer temperature difference in the cold energy recycling process is reduced, efficient electric energy conversion is achieved, and remarkable economic benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of LNG comprehensive utilization, and relates to a multi-stage LNG cold energy power generation and comprehensive utilization system and method, in particular to a multi-working medium and multi-cycle LNG cold energy power generation and comprehensive utilization system and method using an ultra-low temperature heat source. Background technique [0002] Natural gas is a mixture of different components in a certain proportion. Its main components are hydrocarbons, including methane, ethane, propane, butane, etc., of which methane accounts for more than 90%. LNG is liquefied natural gas (Liquefied Natural Gas). After the natural gas produced in the gas field is purified and processed, it is liquid natural gas under normal pressure after a series of ultra-low temperature liquefaction. It is recognized as the cleanest fossil energy on earth. Generally, liquefied natural gas is liquefied by cooling down to about ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F01K25/10F01K17/02F01K13/00F01K21/00
CPCF01K25/10F01K17/02F01K13/00F01K21/00
Inventor 杨天亮张勇甄晓伟田欢
Owner 青岛中稷龙源能源科技有限公司