LNG air-conditioning refrigeration system

Abstract

The invention provides an LNG air-conditioning refrigeration system. The LNG air-conditioning refrigeration system comprises an LNG storage tank, a three-medium high temperature difference heat exchanger, an air-conditioning refrigeration unit and a control unit; the LNG storage tank is used for storing LNG; the three-medium high-temperature difference heat exchanger comprises a shell, an upper heat exchanger and a lower heat exchanger; a containing cavity is arranged in the shell; a cold storage agent with gas-liquid conversion characteristics is arranged in the containing cavity; the cold storage agent comprises a gas-phase cold storage agent in a gaseous state and a liquid-phase cold storage agent in a liquid state; the air conditioning refrigeration unit comprises a fan coil heat exchange unit and a circulating pump; the lower heat exchanger, a coil heat exchanger and the circulating pump communicate through pipelines; a secondary refrigerant is arranged in the pipelines of the airconditioning refrigeration unit; the fan coil heat exchange unit comprises a fan and the coil heat exchanger; the fan is positioned on one side of the coil heat exchanger; and the control unit is incontrol connection with the circulating pump and the fan. According to the LNG air-conditioning refrigeration system, a three-medium heat exchange scheme is adopted, the problems of secondary refrigerant freezing and poor heat exchange during double-medium heat exchange are solved, and a function of a cold storage air conditioner is also provided.

Description

technical field [0001] The invention relates to the field of LNG air conditioning and refrigeration, in particular to an LNG air conditioning and refrigeration system. Background technique [0002] With the in-depth transformation of my country's energy consumption structure, LNG, as a clean energy, has achieved considerable development and is widely used in various fields due to its advantages such as high calorific value, low price, low pollution after combustion, and environmental friendliness. As a fuel, LNG is safe, efficient, clean and non-polluting, which not only promotes the transformation of my country's energy structure, but also effectively reduces environmental pollution caused by combustion exhaust emissions. [0003] LNG will release a large amount of cold energy during the vaporization process before combustion, and usually this part of the cold energy will be directly discharged into the atmosphere, resulting in a waste of cold energy. Traditional air-condi...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the problems of freezing of the bridging agent and poor heat exchange in the LNG air-conditioning and refrigeration system in the prior art, the present invention provides an LNG air-conditioning and refrigeration system to solve the above problems

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