Heater of micro-boiling heat-transfer experimental device

Abstract

The invention provides a heater of a micro-boiling heat-transfer experimental device, which comprises a shell, a cover plate, a connecting bolt and a heating copper block, wherein the heating copper block is a cone-shaped table, a hole matched with the top of the cone-shaped table of the heating copper block is arranged on the shell, the top of the heating copper block is positioned in the hole on the shell, the bottom of the heating copper block is arranged on the cover plate, the cover plate and the shell are connected by the connecting bolt, an insulation sleeve is arranged in the contact position of the heating copper block and the shell, and the bottom or the inner part of the heating copper block is provided with a heating rod. The heater can realize heat transfer experiments with high heat-flow density, the heat-flow density of a heating surface can reach 107W / m2 so that a critical thermal load phenomenon is ensured not to happen, and simultaneously air bubble behaviors during micro-boiling can be observed.

Description

technical field [0001] The invention relates to a heater of a miniaturized boiling heat transfer experiment device capable of realizing a visible boiling heat transfer performance experiment under extremely high heat flux density. Background technique [0002] The research on microbubble boiling is still relatively scattered, and only a few countries have carried out preliminary research. There are two disadvantages in the general miniaturized boiling experimental device: first, due to the very high heat flux density on the heating surface, the temperature difference between the heating surface and the non-heating surface is very large, and the thermal expansion is often very different, causing the thermal insulation material to easily swell. Second, some experimental circuits will achieve the sealing function by welding a thin metal sheet on the heating and non-heating surface. However, new thermal resistance will often be added, resulting in the inability to appear microsc...

AI Technical Summary

Problems solved by technology

There are two disadvantages in the general miniaturized boiling experimental device: first, due to the very high heat flux density on the heating surface, the temperature difference between the heating surface and the non-heating surface is very large, and the thermal expansion is often very different, causing the thermal insulation material to easily swell. Second, some experimental circuits will achieve the sealing function by welding a thin metal sheet on the heating and non-heating surface. However, new thermal resistance will often be added, resulting in the inability to appear microscopic boiling phenomenon

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