System and method for measuring heat exchange characteristics of tube bundle

Abstract

The invention discloses a system and a method for measuring heat exchange characteristics of a tube bundle. The system comprises an air inlet pipeline, wherein an air inlet is formed in the left side of the air inlet pipeline; an axial flow fan, an air flue gate and a Venturi section are sequentially arranged from left to right inside the air inlet pipeline; a first straight tube section is connected with the right side of the Venturi section; a pitot tube is arranged inside the first straight tube section; the pitot tube is connected with a micromanometer; a replaceable heat exchange tube bundle testing section is connected with the right side of the first straight tube section; a second straight tube section is connected with the right side of the heat exchange tube bundle testing section; an air outlet is formed in the right side of the second straight tube section; temperature sensors I are arranged on the left side and the right side of the heat exchange tube bundle testing section; the temperature sensors I are connected with a data acquirer I. The system has universality as only the heat exchange tube bundle testing section needs to be replaced and an air flue and water pipelines do not need to be replaced; selected testing points can meet the use requirement of the device, the measurement is precise; the heat balance is ensured, and relatively small testing result errors can be caused.

Description

technical field [0001] The present invention relates to a system and method for measuring heat transfer characteristics of tube bundles. Background technique [0002] In engineering practice, heat exchangers are widely used in power, chemical industry, metallurgy, aerospace, air conditioning, refrigeration, machinery, textile, construction and other industries. Heat exchangers have different forms according to different uses and heat exchange environments. Among them, the heat exchange tube bundle is widely used in the indirect convection heat exchange process of two media. In order to enhance the effect of convective heat transfer, on the basis of traditional heat exchange tubes, reprocessing is carried out, mainly including coating or porous surface and other treated surfaces, rough surfaces, extended surfaces such as fins, spoiler elements, twisted belts or spiral blades Such as swirl components, spiral tubes, etc. [0003] In the indirect heat exchanger of two media, t...

AI Technical Summary

Problems solved by technology

The main problems are: according to different design conditions, it is necessary to set up supporting air ducts and water side pipes, and the experimental platform is not universal; the experimental platform is limited by the location of the building, and the measurement is not accurate; there are many factors affecting heat transfer, and the heat balance of the test is difficult. Guaranteed, the test results have large errors

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