Compound heat pipe, method of manufacturing the same, heat exchanger and heat exchanger system using the same

Abstract

The compound heat pipe according to the present invention may overcome physical limits, which a single metal pipe might have, by integrally joining different metal pipes having different physical properties, forming ridges on an inner surface thereof the pipe and protrusions on an outer surface thereof and may first increase heat transfer capability by increasing the heat transfer area between the pipe and fluid. Further, the compound heat pipe according to the present invention may secondly increase the heat transfer capability by setting the noncontact rate to be 30% or less so that the heat transfer rate of the compound heat pipe in the radial direction may be optimized.

Description

technical field [0001] The invention relates to a heat transfer tube used in a heat exchanger, in particular to a composite heat transfer tube composed of metal materials with different physical properties. Background technique [0002] Generally, industrial equipment, heating and cooling equipment, various mechanical devices, and the like are equipped with a heat exchange system for performing a heat exchange function. In such heat exchange systems, heat transfer tubes are widely used as metal tubes for heat exchange. For example, in the absorber and evaporator of an absorption refrigerator that utilizes the principle that the liquid solubility of refrigerant vapor varies with temperature and pressure, for the heat exchange between cooling water and absorption liquid and between cold water and refrigerant Use heat transfer tubes. Also, in the evaporator of the turbo refrigerator, heat transfer tubes are used for heat exchange between cold water and refrigerant (R134a). ...

AI Technical Summary

Problems solved by technology

The existence of such gaps reduces the heat transfer performance between the fluid flowing inside the heat transfer tube and the fluid flowing outside the heat transfer tube

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