Liquid metal sodium boiling two-phase thermal-hydraulic test loop system and test method thereof

Abstract

The invention discloses a liquid metal sodium boiling two-phase thermal-hydraulic test loop system and a test method thereof. The loop system is divided into three parts comprising a high temperature part, a low temperature part and an argon branch, wherein the low temperature part comprises a sodium storage tank, an electromagnetic pump, an electromagnetic flowmeter, a purification cold trap, four sodium valves and corresponding connecting pipelines; the low temperature part is made of 316L stainless steel; the high temperature part comprises a regeneration heater, a preheater, a test section, an upper expansion box and corresponding connecting pipelines; the high temperature part is made of Incoloy 800 and allows the operating temperature to reach 1,200 DEG C; and the argon branch comprises an argon bottle, an expansion pressure stabilizing box, a vacuum pump, three pressure gauges, ten vacuum diaphragm valves and corresponding connecting pipelines. The system is suitable for operating at high temperature, has a good sealing property and can realize analysis and research on the liquid metal sodium boiling two-phase heat exchange flow characteristic by adding different test sections and a data acquisition system.

Description

【Technical field】 [0001] The invention belongs to the subject field of engineering thermophysics and energy utilization, and in particular relates to a liquid metal sodium boiling two-phase thermal-hydraulic experimental circuit system. 【Background technique】 [0002] Liquid metal sodium is the preferred coolant material for fast neutron reactors, and its boiling two-phase flow heat transfer characteristics are of great significance for the safe operation of sodium-cooled fast neutron reactors and the prediction and analysis of accident conditions. In order to accurately and objectively obtain data on the heat transfer characteristics of liquid metal sodium boiling two-phase flow, it is necessary to establish a corresponding experimental loop device. Due to the high boiling point of liquid metal sodium (close to 900°C under normal pressure) and its very active chemical properties, the requirements for high temperature resistance and sealing performance of the corresponding e...

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Problems solved by technology

However, the circuit described in this invention is designed for the study of liquid metal sodium single-phase flow heat transfer characteristics, and the maximum allowable operating temperature of the circuit is lower than 600°C, which is lower than the boiling temperature of liquid metal sodium, so it is not suitable for liquid metal sodium boiling Analysis and Research on Heat Transfer Characteristics of Two-Phase Flow

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