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LNG power-driven ship main engine waste heat and LNG vaporization cold energy integrated utilization system

A main engine and waste heat technology, applied in the direction of charging system, engine components, combustion engine, etc., can solve the problems of high LNG pressure, increase system energy consumption, etc., achieve optimal system efficiency, reduce operating costs, compact and simple system structure Effect

Pending Publication Date: 2022-03-01
JIANGSU UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for large LNG-powered ships, the pressure of LNG entering the main engine is required to be high. In the above-mentioned power generation system, LNG is only boosted to about 3MPa, and further increasing the booster pump will increase the energy consumption of the system

Method used

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  • LNG power-driven ship main engine waste heat and LNG vaporization cold energy integrated utilization system

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with embodiment, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read this description, those skilled in the art are to the modification of various equivalent forms of this description All fall within the scope defined by the appended claims of this application.

[0022] Please combine figure 1 As shown, the integrated utilization system of the waste heat of the main engine of the LNG-powered ship in this embodiment and the cold energy of LNG vaporization includes the following five parts:

[0023] The LNG evaporation side includes an LNG storage tank 1, a first-stage LNG booster pump 2, a first-stage LNG heat exchanger 3, a second-stage LNG booster pump 4, a second-stage LNG heat exchanger 5 and The third-stage LNG heat exchanger 6, wherein the outlet of the first-stage LNG boo...

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Abstract

The invention discloses an LNG (Liquefied Natural Gas) power ship main engine waste heat and LNG vaporization cold energy integrated utilization system which comprises an NG (Natural Gas) evaporation side, and LNG is sequentially subjected to first-stage pressurization, first-stage heat exchange, second-stage pressurization, second-stage heat exchange and third-stage heat exchange to form a gas state; the first-stage Rankine cycle power generation unit, the second-stage Rankine cycle power generation unit and the third-stage transcritical Rankine cycle power generation unit are transversely nested, cold sources of all the units are formed through LNG step-by-step heat exchange, and the Rankine cycle full power generation system with two-stage pressurization and three-stage transverse nesting is formed by using smoke as a heat source. The system is compact in structure, can meet the air inlet pressure requirement of a main engine, has high system efficiency, and reduces the operation cost of a ship.

Description

technical field [0001] The invention relates to an integrated utilization system of thermal energy and cold energy of an LNG-powered ship, in particular to an integrated utilization system of waste heat of a main engine of an LNG-powered ship and LNG vaporization cold energy. Background technique [0002] With the substantial growth of the global liquefied natural gas (LNG) trade volume and the rapid development of the LNG shipping industry, the process of realizing LNG cold energy cascade utilization for ships has also begun to receive widespread attention. In the past, the utilization of LNG vaporization cold energy was mostly aimed at land LNG vaporization stations. The utilization methods of vaporization cold energy include seawater desalination, cold storage, air conditioning, and power generation. LNG-powered ships often discharge a large amount of cold energy into seawater or jacket water during the use of LNG, causing environmental pollution and energy waste. [000...

Claims

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Application Information

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IPC IPC(8): F02M21/02F01K7/02
CPCF02M21/0215F02M21/0287F01K7/02Y02T10/12Y02T10/30
Inventor 姚寿广魏越张子敬杨伊豪
Owner JIANGSU UNIV OF SCI & TECH
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