Teaching experimental apparatus for measuring two-phase convective heat-transfer coefficient of micropipe

Abstract

The invention discloses a teaching experimental apparatus for measuring the two-phase convective heat-transfer coefficient of a micropipe. A micro injection pump is connected with an inlet of a detachable phase mixer through a connecting pipe fitting, a gas storage tank is connected with another inlet of the detachable phase mixer through the connecting pipe fitting, an outlet of the detachable phase mixer is connected with a glass connecting tube, a micron stainless steel tube, a fluid type observer, and the connecting pipe fitting in sequence. The micron stainless steel tube is externally provdied with an insulated black cavity, the inlet end and outlet end of the stainless tube are provided with thermocouples, the stainless steel tube is also connected with heating leads and connected with a power-adjustable heating unit, and the corresponding part of the stainless steel tube is provdied with an online infrared heat detector, the thermocouples are connected with a computer through a data acquisition unit, and the online infrared heat detector and the power-adjustable heating unit are connected with the computer. The teaching experimental apparatus disclosed by the invention aims at the purpose of teaching experiment, takes the two-phase convective heat transfer in the stainless steel tube as a research object, is simple in structure, high in precision, good in stability, and can be used for achieving remote teaching.

Description

technical field [0001] The invention relates to the field of measuring the heat transfer coefficient of two relatives, in particular to a teaching experiment device for measuring the heat transfer coefficient of two relatives of microtubes. Background technique [0002] The flow conditions of gas-liquid two-phase fluid are often encountered in industries such as power, chemical industry, nuclear energy, refrigeration, petroleum, and metallurgy. There is also the problem of heat transfer in two-phase fluids in these industrial plants with heat exchange. For example, in various boiling tubes, various gas-liquid mixers, gas-liquid separators, various heat exchangers, rectification towers, chemical reaction equipment, various condensers and other equipment in nuclear power plants and thermal power plants Flow and heat transfer problems of gas-liquid two-phase fluids exist widely. The convective heat transfer coefficient of a gas-liquid two-phase fluid reflects the heat transfe...

AI Technical Summary

Problems solved by technology

So far, for the purpose of teaching experiments, the two-phase heat transfer in stainless steel tubes has been used as the research object, and the two-phase heat transfer coefficient equipment with simple operation, high precision and good stability has not been reported.

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