Refrigerating/heating system of air-conditioner of LNG (Liquefied Natural Gas) power-driven vessel

Abstract

The invention discloses a refrigerating / heating system of an air-conditioner of an LNG (Liquefied Natural Gas) power-driven vessel; the refrigerating / heating system comprises an LNG vaporization loop, an ice storage circulation loop, a heat recycling loop and a seawater loop. In summers, a two-stage refrigerant and cold energy transferring manner is adopted, cold energy produced by the LNG vaporization during the running of the LNG power-driven vessel is recycled and stored in a cold and heat accumulating device and used as a cold source of an air-conditioning system to meet the cold supplying demand of vessel cabins; in winters, the vaporized LNG enters a power system of a vessel main engine and is combusted to generate a large amount of residual heat for recycling, and the residual heat is used as a heat source of the air-conditioning system to meet the heating demand of the vessel cabins. The cold energy produced during the LNG vaporization and the heat capacity released during combustion are used as the cold and heat sources of the air-conditioning system; therefore, not only the cold and heat demands of the vessel cabins are solved, but the large amount of investment in the refrigerating unit of the air-conditioning system of the vessel is saved; and meanwhile, the refrigerating / heating system solves the mismatching of the LNG vaporization capacity and cold / heat capacities the technical bottleneck of the non-synchronization between the vaporization time and the cold / heat utilization time.

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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