ORC composite power generation system suitable for LNG hybrid power ship

Abstract

The invention is aimed at providing an ORC composite power generation system suitable for an LNG hybrid power ship. The system is characterized in that the system comprises a first-grade ORC loop (I),a second-grade ORC loop (II), an LNG / diesel-oil dual fuel main engine cylinder sleeve water cooling loop (III), a smoke cooling loop (IV) and an LNG gasification loop (V); the first-grade ORC loop (I) takes cylinder sleeve cooling water as a heat source and takes LNG gasification cold energy as a cold source; the second-grade ORC loop takes smoke as a heat source and takes LNG gasification cold energy as a cold source; the first-grade ORC loop is connected with the LNG gasification loop through a first-grade condenser and connected with the LNG / diesel-oil dual fuel main engine cylinder sleevewater cooling loop through a first-grade evaporator; and the second-grade ORC loop is connected with the LNG gasification loop through a second-grade condenser and connected with the smoke cooling loop through a second-grade evaporator. The ORC composite power generation system suitable for the LNG hybrid power ship can effectively integrate heat sources and cold sources at different temperaturein the LNG hybrid power ship and helps avoid loss during a large temperature difference heat transfer process by creating an ORC composite system. Therefore, energy utilization rate of the LNG hybridpower ship is increased.

Description

【Technical field】 [0001] The invention belongs to the field of power engineering, and relates to a ship waste heat utilization system, in particular to an ORC composite power generation system suitable for LNG hybrid ships. 【Background technique】 [0002] At present, traditional fuels are widely used in shipping ships, and the proportion of fuels in the transportation costs of ships is getting higher and higher. The air pollution (especially PM2.5) caused by fuels has attracted widespread attention. The International Maritime Organization (IMO) pointed out that air pollution, noise pollution and oil pollution caused by shipping accounted for 4.3% of global pollution emissions, and by 2020, this proportion will rise to 12.9%. Searching for efficient and clean fuels is an inevitable trend for the sustainable development of the shipping industry. Liquefied natural gas (Liquid Nature Gas, LNG) is a colorless liquid with methane as the main component. Compared with diesel combu...

AI Technical Summary

Problems solved by technology

The evaporation pressure of this system is limited by seawater temperature and does not utilize the high grade heat source on LNG hybrid ships

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