LNG cold energy utilization system and method for marine air conditioner

Abstract

The invention discloses an LNG cold energy utilization system and method for a marine air conditioner. The system comprises an LNG fuel supply system and an air conditioner heat exchange circulation system, wherein the LNG fuel supply system involves an LNG storage tank, an LNG gasifier and a natural gas heater which are sequentially connected, and the LNG gasifier is further provided with a first circulation inlet and a first circulation outlet; and the air conditioner heat exchange circulation system involves a first heat exchange circulation pipeline, an air conditioner heat exchange device, a first circulation pump and a supplementary heater, the air conditioner heat exchange device, the first circulation pump and the supplementary heater are sequentially arranged on the first heat exchange circulation pipeline, the first heat exchange circulation pipeline is filled with a first heat exchange liquid, an inlet of the air conditioner heat exchange device communicates with the first circulation outlet, and an outlet of the supplementary heater communicates with the first circulation inlet so that the first heat exchange liquid meeting a preset temperature range can be provided at the first circulation inlet. Under the condition that normal supply of LNG fuel of a ship is guaranteed, cold energy released in the using process of the LNG fuel can be utilized to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of utilization of LNG cold energy, in particular to a system and method for utilizing LNG cold energy by a marine air conditioner. Background technique [0002] With the increasing pressure of environmental emission reduction and the continuous improvement of society's demand for clean energy, the trend of ships using LNG fuel is becoming more and more obvious. However, when the LNG fuel is heated and turned into a combustible gas, a large amount of cooling energy contained in it is not utilized at all, which is a serious waste of energy. At the same time, ships often need large-scale air-conditioning systems to provide the necessary cooling capacity, especially for some passenger ships with a large number of people, the demand for cooling energy of the air-conditioning system is even greater. [0003] Therefore, introducing the cold energy released during the process of heating LNG fuel into gas into the s...

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Problems solved by technology

[0004] At present, although there are systems and methods that link the air-conditioning system with LNG cold energy utilization, in the field of marine air-conditioning, due to the limitation of ship space and boundary conditions, these existing methods are not fully applicable, especially some methods Both the air-conditioning system and the LNG fuel system have special restrictions, and it is difficult to fully take into account the specific requirements of the two under various working conditions. The utilization rate of cold energy is low, the original system is too restricted, and the equipment is difficult to realize.

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