High-temperature molten salt property joint measurement device and method based on multi-layer heat transfer model

By combining a multilayer heat transfer model and an adaptive chaotic particle swarm optimization algorithm, the problem of neglecting volumetric radiation and heat transfer effects in molten salt thermophysical property testing was solved, enabling accurate measurement of the thermal conductivity and absorption coefficient of high-temperature molten salt, and improving the accuracy and reliability of the measurement.

CN120064373BActive Publication Date: 2026-07-03HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN INST OF TECH
Filing Date
2025-02-13
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing molten salt thermophysical property testing techniques fail to accurately account for the volumetric radiation effect inside high-temperature molten salt and the heat transfer effect of the encapsulated container, resulting in low reliability of test data and difficulty in meeting industrial needs.

Method used

A high-temperature molten salt property measurement device and method based on a multi-layer heat transfer model was adopted. Combining a laser, fiber collimator, constant temperature heating furnace, graphite crucible, zoom lens system, high-sensitivity infrared detector and Fourier transform infrared spectrometer, the thermal conductivity and absorption coefficient of molten salt were accurately measured by using a multi-layer transient heat transfer model and an adaptive chaotic particle swarm optimization algorithm.

Benefits of technology

It improves the accuracy of molten salt thermophysical property measurement, removes background radiation interference, improves the local optimum trapping problem of traditional methods, and provides measurement results that are more in line with reality.

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Abstract

This invention relates to a combined measurement device and method for high-temperature molten salt properties based on a multi-layer heat transfer model. The invention addresses the problem that existing high-temperature molten salt thermophysical property testing device models do not consider internal volumetric radiation and heat transfer from the encapsulated container. In this invention, a laser is connected to a fiber optic collimator via a transmission fiber. The fiber optic collimator is positioned below a constant-temperature heating furnace, which is placed on a support. A graphite crucible is positioned in the center of the bottom surface of the constant-temperature heating furnace, and a lid is fitted onto the graphite crucible. A zoom lens system is positioned directly above the constant-temperature heating furnace, with the focal point of the zoom lens system located at the center of the upper surface of the lid. A high-sensitivity infrared detector collects the infrared signal transmitted through the zoom lens system. The output of the high-sensitivity infrared detector is connected to the receiver of a Fourier transform infrared spectrometer, which is connected to a computer. This invention belongs to the field of high-temperature material thermophysical property measurement technology.
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