A marine LNG vaporization and air conditioning integrated system and control method

Abstract

The invention discloses a marine LNG vaporization and air-conditioning integrated system and a control method. The system includes an LNG vaporization circuit, a main and auxiliary engine cylinder liner cooling water circuit and a ship air-conditioning circuit. The large amount of heat released during the combustion of the auxiliary engine power system is used as the heat source of the LNG vaporization and air-conditioning circuit, and the large amount of cold energy generated during the LNG vaporization process is used as the cold source of the air-conditioning circuit, and the main and auxiliary engine cylinder liner cooling water of the ship is used as the energy carrier to realize The integrated operation of marine LNG vaporization and air-conditioning system meets the power demand of ship navigation and air-conditioning system. The invention makes full use of the cold energy generated during vaporization of LNG and the heat released during combustion, solves the problem of vaporization of LNG, satisfies the refrigeration and heating requirements of ship air conditioners, and breaks through the mismatch between the amount of vaporization of LNG and the required cooling capacity of air conditioners and the time of vaporization of LNG A low energy consumption, low emission and high energy efficiency air-conditioning system for LNG powered ships is proposed due to the technical bottleneck that is not synchronized with the cooling time.

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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