Ship LNG vaporization and air conditioner integrated system and control method

Abstract

The invention discloses a ship LNG vaporization and air conditioner integrated system and a control method. The system comprises an LNG vaporization loop, a ship main and auxiliary machine cylinder liner cooling water loop and a ship air conditioner loop. According to the control method, a large amount of heat released through combustion of LNG in a ship main and auxiliary machine power system serves as a heat source for the LNG vaporization loop and the air conditioner loop, a large amount of cold energy produced in the LNG vaporization process serves as a cold source of the air conditioner loop, ship main and auxiliary machine cylinder liner cooling water serves as an energy carrier, integrated running of the ship LNG vaporization and air conditioner system is achieved, and the requirement of ship navigation and the air conditioner system for power is met. The cold energy generated during vaporization of the LNG and heat released during combustion of the LNG are sufficiently utilized, the LNG vaporization problem is solved, the ship air conditioner refrigerating and heating requirements are met, and the technical bottleneck that the LNG vaporization amount and the air conditioner cold needing amount are not matched, and the LNG vaporization time and the cold utilizing time are not synchronous is broken through, and the LNG power ship air conditioner system low in energy consumption and emission and high in energy efficiency is provided.

Description

technical field [0001] The invention relates to a marine LNG vaporization and air-conditioning integrated system and a control method, belonging to the technical field of air-conditioning engineering. Background technique [0002] Since the beginning of the 21st century, my country's fuel prices have continued to rise, greatly increasing the cost of ship operations; at the same time, with the increase of various types of pollution, environmental issues have become an epochal theme in the world. The large amount of air pollutants emitted by ships using diesel oil seriously affects the air quality of inland ports and coasts. Therefore, finding cheap and environmentally friendly fuels has become an urgent need for the shipping industry. [0003] Natural gas reserves are abundant and the price is cheap. Using LNG as fuel is the general trend of future ship development. At present, power ships using LNG as the main fuel mainly use seawater as a heat source to vaporize LNG at -1...

AI Technical Summary

Problems solved by technology

Although the system adopts the two-stage cold energy recovery mode to fully recover the cold energy released by LNG, the system has a great defect in the use of cold energy. It uses the cold energy absorbed in the primary heat exchanger for In the refrigerating room, due to the large difference between the cooling capacity required for the initial operation and the continuous operation of the refrigerating room, there is a large difference between the cooling capacity required for the refrigerating room in this system and the amount of cold energy released when the LNG is vaporized, resulting in a release of cooling capacity. The serious mismatch with the required cooling capacity leads to insufficient LNG vaporization, which affects the demand for LNG vaporization in the normal operation of the ship's power system

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