System and method for utilizing ship LNG cold energy by refrigerated container

Abstract

The invention discloses a system and method for utilizing ship LNG cold energy by a refrigerated container. The system mainly comprises a refrigerated container cold energy utilization system, a supply pipeline system and an LNG fuel supply system. When a ship sails on the sea, LNG fuel is consumed; a 50% ethylene glycol solution is used as a refrigerant to exchange heat with LNG fuel; a refrigerant for obtaining cold energy enters the refrigerated container heat exchanger through the liquid supply pipe, the quick coupling and the electromagnetic valve in sequence to release cold energy for refrigeration, therefore, the cold energy of the ship LNG fuel is used for refrigerating the refrigerated container; the consumption of a heat source in the LNG fuel gasification process can be reduced;the ship power grid load is reduced; the problem that the ship power grid load of a large LNG power container ship is huge due to refrigeration of a refrigerated container is solved; reasonable utilization of energy is achieved, the supply pipeline system and the refrigerated container utilization system are connected through a hose, a quick connector and the like, the problem that a movable refrigerating device cannot utilize LNG cold energy is solved, and the economical efficiency of a ship is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of ships, and relates to a refrigerator system and a method for utilizing LNG cold energy in LNG-powered ships. Background technique [0002] The "Global Sulfur Limit Order" issued by the International Maritime Organization (IMO) is coming soon, stipulating that since 2020, the sulfur content of fuel oil for all ships worldwide must be reduced from 3.5% to 0.5%. Therefore, realizing energy saving and emission reduction of ships and seeking new alternative energy sources have become the most urgent tasks of the shipping industry. [0003] Liquefied natural gas (LNG) has the advantages of low temperature, large gas-liquid expansion ratio, high energy efficiency, and easy transportation and storage. LNG is currently recognized as the least polluting fossil fuel. If it is used as a substitute for fuel oil, it can reduce greenhouse gas emissions by limiting pollution. gas emissions, thereby improving air quality...

AI Technical Summary

Problems solved by technology

Therefore, the power supply load of the ship's engine room power grid can reach several thousand kilowatts, or even larger, which greatly increases the ship's fuel consumption and equipment investment costs due to power supply.

Images