A non-frosting composite heat exchange tube with adjustable heat transfer coefficient

Abstract

The invention relates to the technical field of composite heat exchange pipes, in particular to a frost-proof composite heat exchange pipe with an adjustable heat transferring coefficient. The frost-proof composite heat exchange pipe is provided with a heat exchange pipe body and is characterized in that an outer pipe body is arranged at the outer side of the heat exchange pipe body in a coaxial sleeving manner, the inner diameter of the outer pipe body is at least 0.01mm larger than the outer diameter of the heat exchange pipe body, a gap between the outer pipe body and the inner heat exchange pipe body forms a sandwiched cavity, expansion joints are separately arranged at the two ends of the outer pipe body, the inner ends of the expansion joints are connected with the outer pipe body, the outer ends of the expansion joints are connected with the heat exchange pipe body, an air inlet is arranged on the joint body of one of the expansion joints, the air inlet is connected with an air pressure regulating device, a controller, a miniature high-pressure air storing tank, a vacuum pump and an electromagnetic valve are arranged in the air pressure regulating device, and the outer part of the air pressure regulating device is provided with a temperature and humidity sensor used for measuring outdoor air and a temperature sensor used for measuring the outer wall temperature of the outer pipe body of the heat exchange pipe. The frost-proof composite heat exchange pipe has the advantages that the heat transferring coefficient is adjustable, the surface of a gasifier does not frost, the heat exchange efficiency is high and the like.

Description

technical field [0001] The invention relates to the technical field of composite heat exchange tubes, in particular to a non-frosting composite heat transfer tube with simple structure, adjustable heat transfer coefficient, no frosting on the surface of the gasifier, and high heat transfer efficiency. Tube. Background technique [0002] As we all know, in most cases, people hope that the greater the heat transfer intensity of the heat exchange tube, the better, so various heat transfer enhancement measures are adopted to increase the heat transfer effect. However, the air-temperature vaporizer is a heat exchanger, and the heat transfer intensity of the liquefied gas to the air is too large, which will cause serious frosting outside the heat exchange tube, especially in humid weather. An air-temperature vaporizer is a device that uses ambient air as a heat source to convert low-temperature liquefied gas into normal-temperature gas, such as heating liquid nitrogen (-196°C) or...

AI Technical Summary

Problems solved by technology

When ice and frost form outside the heat exchange tube of the gasifier, the heat transfer efficiency of the gasifier is greatly reduced, and the gasification capacity drops rapidly. In summer, it is necessary to stop the gasifier to melt the ice, and in winter, it is necessary to stop the gasifier and artificial assistance means deicing, the vaporizer cannot continue to work stably

In order to meet the required gasification capacity, the user needs to configure a larger area gasifier or use an auxiliary heat source for heating to meet the needs of gasification capacity in different weather conditions, which greatly increases investment costs and management and maintenance costs

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