Anti-frosting LNG air-heated nanofluid heat exchange pipe

Abstract

The invention discloses an anti-frosting LNG air-heated nanofluid heat exchange pipe which comprises an outer heat exchange pipe and an inner heat exchange pipe, wherein the upper parts of the outer heat exchange pipe and the inner heat exchange pipe are fixedly connected through a first hub support; the lower parts of the outer heat exchange pipe and the inner heat exchange pipe are fixedly connected through a second hub support; a capillary heat exchange pipe is arranged between the outer heat exchange pipe and the inner heat exchange pipe; a nanofluid is introduced in the capillary heat exchange pipe; through holes are uniformly distributed in the outer heat exchange pipe; and bulges are arranged on the edges of the through holes. The anti-frosting LNG air-heated nanofluid heat exchange pipe can be widely applied to low-temperature liquid vaporizers and low-temperature storage and transportation equipment self superchargers, the frost can be efficiently removed, the gas supply quality at the outlet of a vaporizer is maintained, and the anti-frosting LNG air-heated nanofluid heat exchange pipe has the advantages of low cost, convenience in mounting and disassembly, and the like, and has remarkable economic benefits and social benefits in cryogenic engineering.

Description

technical field [0001] The invention belongs to the technical field of low-temperature engineering and low-temperature technology, in particular to a double-layer sleeve-type high-efficiency defrosting heat exchange tube using a new type of heat transfer medium nanofluid, and specifically relates to an anti-frosting LNG air-temperature nanometer Fluid heat exchange tubes. Background technique [0002] The air-heated finned tube gasifier is a device that absorbs heat from the external environment and transfers it to a low-temperature medium to make it gasify. Because of its simple structure and low operating cost, it is widely used in low-temperature liquid vaporizers, self-superchargers for low-temperature storage and transportation equipment, etc. In the LNG gasification station, the gasifier is the main equipment of the gasification system. However, in practical applications, the finned tube heat exchanger generally suffers from frosting under low temperature conditions. ...

AI Technical Summary

Problems solved by technology

Water vapor frosts and condenses on the outer surface of the heat exchanger. Frost not only forms a thermal resistance between the external humid air and the surface of the heat exchanger, but also narrows the air flow path, resulting in an increase in pressure drop

Therefore, due to the influence of the overall structure around the finned tube heat exchanger in the middle part of an air-temperature vaporizer, it will The overall heat transfer efficiency will inevitably decrease

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