Supercritical fluid enhanced heat transfer structure

Abstract

The invention relates to the technical field of supercritical fluid heat transfer, and provides a supercritical fluid enhanced heat transfer structure. The supercritical fluid enhanced heat transfer structure comprises a plurality of enhanced heat transfer units. Each enhanced heat transfer unit comprises an enhanced heat transfer assembly, and each enhanced heat transfer assembly comprises a plurality of wing-like flow guiding pieces. The flow guiding pieces are sequentially installed on the wall face of a runner to be subjected to enhanced heat transfer in the main flow direction of supercritical fluid, and the shapes of the flow guiding pieces are various instant shapes of a single wing of a bird at equal time intervals during every wingbeat in sequence. By arranging the multiple wing-like flow guiding pieces sequentially arranged in the main flow direction of the supercritical fluid, the whole process of wingbeat of the bird is simulated in a supercritical flow field, it is ensuredthat enhanced heat transfer is performed on the wall face of the runner through the drained supercritical fluid while local flow resistance is lowered as much as possible, and therefore economical efficiency of the heat transfer process is ensured.

Description

technical field [0001] The invention relates to the technical field of supercritical fluid heat transfer, in particular to a supercritical fluid enhanced heat transfer structure. Background technique [0002] Supercritical fluid refers to a fluid whose temperature and pressure are higher than its critical state, such as supercritical carbon dioxide and supercritical water. Supercritical fluid has the characteristics of high density, high thermal conductivity, low viscosity, and low surface tension. Its flow and heat transfer performance are superior to conventional fluids. It has been widely used in high-tech fields such as power engineering and aerospace engineering. [0003] Although the change of supercritical fluid from low-temperature liquid phase to high-temperature gas phase is a continuous process without phase transition, the flow and heat transfer phenomena of supercritical fluid during heating or cooling are very complicated. When the operating parameters are bad...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a supercritical fluid enhanced heat transfer structure, in order to solve the current passive enhanced heat transfer through supercritical fluid, the additional components placed in the flow field introduce greater flow resistance, and Larger flow resistance may cause problems where additional energy consumption outweighs heat transfer enhancement benefits

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