Cold storage system and method of LNG (Liquefied Natural Gas) power container ship

Abstract

The invention discloses a cold storage system and method for an LNG power container ship. The system comprises an LNG combustion system, an LNG heat exchange system and a cold storage system body. For the problems that the LNG power container ship is high in power, the LNG fuel consumption is large and a large amount of released cold energy cannot be utilized, the system stores excessive cold energy on the LNG power container ship in a cold storage box ice making manner, and the problem of excessive cold energy of the LNG power container ship is solved. Through the method, the cold energy of LNG fuel on the ship can be used for land requirements, so that the cold energy of an LNG can be fully utilized, and power consumption of refrigeration equipment of a user needing the cold energy on land is saved; and along with large-scale development of the container ship, the main motor power of the LNG power container ship is higher and higher, and the consumption of the LNG fuel is larger and larger, so that the released cold energy is more and more, and the cold storage system and method disclosed by the invention have relatively good application value.

Description

technical field [0001] The invention belongs to the technical field of ships, and in particular relates to a cold storage system and method for an LNG-powered container ship. Background technique [0002] "LNG-powered ship" refers to a ship powered by liquefied natural gas (LNG). In recent years, the problem of air pollution caused by marine diesel has become increasingly serious. , environmental protection, energy saving and economical advantages are being more and more applied to ships, so the number of LNG powered ships is increasing. Since LNG is a cryogenic liquid at -163°C, it is necessary to The main diesel engine of a power ship needs to be vaporized before being burned to reach the air supply temperature of the main diesel engine of the ship. In this process, a large amount of cold energy will be released. Because the main engine power of LNG-powered container ships is relatively large, the LNG fuel consumption is large. The cold energy released during the use of L...

AI Technical Summary

Problems solved by technology

At present, some people have proposed to use this part of cold energy in ship air conditioning and cold storage, but the application of air conditioning and cold storage only needs a small amount of cold energy to achieve, there will still be a lot of cold energy that has not been utilized, and this part of cold energy can also be used Power generation is performed in the Rankine cycle, but the Rankine cycle power generation system has a complex structure and high cost, and is rarely used on ships. Therefore, there is currently a surplus of LNG cold energy on LNG-powered container ships

[0003] For the problem of excess cold energy of LNG-powered container ships, the Chinese patent No. CN110901870A proposes a system and method for utilizing LNG cold energy in refrigerated containers. The invention realizes the utilization of LNG cold energy in refrigerated containers. When there are many refrigerated containers, this method has a high utilization rate of cold energy. Due to the influence of the source of goods, the number of refrigerated containers is relatively small, so the utilization rate of cold energy is relatively low.

Other similar patents have the problem of low utilization rate of LNG cold energy for the utilization of ship LNG cold energy

Images