A kind of LNG power ship air conditioning refrigeration/heating system

Abstract

The invention discloses an air-conditioning refrigeration / heat supply system for an LNG powered ship, which comprises an LNG vaporization circuit, an ice cold storage circulation circuit, a heat recovery circuit and a seawater circuit. In summer, the cold energy generated by the vaporization of LNG during the operation of the LNG-powered ship is recovered and stored in the cold storage device by using the two-stage refrigerant cold energy transfer method, which is used as the cold source of the air-conditioning system to meet the cooling demand of the ship's cabin; in winter When the vaporized LNG enters the main engine power system of the ship, a large amount of waste heat generated after combustion is recovered and used as the heat source of the air conditioning system to meet the heating demand of the ship's cabin. The present invention utilizes the cooling capacity produced during LNG vaporization and the heat released during combustion as the cold and heat sources of the air conditioning system, which not only solves the cooling and heating requirements of the ship cabin, saves a large amount of investment in the refrigeration unit of the ship air conditioning system, but also solves the problem of LNG The technical bottleneck that the amount of vaporization does not match the cold / heat used, and the time of vaporization is not synchronized with the time of cold / heat used.

Description

technical field [0001] The invention relates to an air-conditioning refrigeration / heating system of an LNG powered ship, in particular to obtain a high-efficiency, energy-saving, green and environment-friendly air-conditioned refrigeration / heating system at a lower cost, in particular to a system that fully utilizes ice storage to recover LNG-powered ships during operation , LNG produces a large amount of cold energy during the vaporization process as the cooling source of the ship's air-conditioning system, and the large amount of waste heat generated when the vaporized LNG is burned as the heat source of the ship's air-conditioning system. The air-conditioning refrigeration and heating system of LNG-powered ships belongs to air-conditioning engineering technology field. Background technique [0002] With the rapid development of economic globalization, the shipbuilding industry is full of vitality, but with the rapid development of the shipbuilding industry, the marine env...

AI Technical Summary

Problems solved by technology

However, this system has great defects in the utilization of cooling capacity. It utilizes the cooling capacity absorbed in the first-stage heat exchanger in the refrigerator room. Since the cooling capacity required for the initial operation and continuous operation of the refrigerator room is quite different, In this system, there is a large difference between the required cooling capacity of the refrigerated room and the release amount of LNG during vaporization, resulting in a serious mismatch between the released cooling capacity and the required cooling capacity, resulting in insufficient LNG vaporization, which affects the normal operation of the ship power system. The demand for the amount of LNG vaporization; in this secondary cooling recovery system, the absorbed cooling is used to cool the heated cylinder jacket water in the ship's power plant

In many existing technologies, there is a lot of recovery and utilization of waste heat from cooling cylinder jacket water of marine engines. This system uses the cooling energy released from LNG to cool cylinder jacket water, which is obviously not economical and environmentally friendly, and not only wastes the cooling energy released by LNG , also wasting the heat in cooling the jacket water

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