Automatic control device of material cold and hot circulation performance and operating method thereof

Abstract

The invention discloses an automatic control device of material cold and hot circulation performance. The device includes a sample chamber in a resistance wire heating cylindrical heating cavity, wherein a spiral cooling water pipe is wound outside the heating cavity; the whole heating cavity is arranged in a thermal insulation device; a high-low limit PID intelligent temperature controller and a relay module control the heating temperature and the on / off of a cooling system; a thermocouple and a data acquisition instrument are adopted to measure temperature and record data; and the device comprises simple structure, efficient experiment and can reduces the labour intensity of experimenter.

Description

technical field [0001] The invention relates to a material thermal stability testing technology. Background technique [0002] With the large-scale development of renewable energy-solar thermal utilization, hydrated salts, molten salts, metals, etc. have attracted more attention as medium-low temperature and high-temperature heat transfer / storage materials. At present, the materials used for medium and high temperature heat transfer / heat storage are mainly various molten salts. Molten salt, as a heat transfer / storage material, often needs to be used continuously for several years at tens, hundreds or even thousands of degrees Celsius, and has to go through tens of thousands of cold and heat (or melting-solidification) cycles. Longer continuous service and more cycles are expected without changing the properties of the molten salt itself. However, existing studies have shown that due to factors such as longer service time, increased number of cycles, and increased temperatu...

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Problems solved by technology

However, molten salts such as halide salts and fluoride salts are strongly corrosive to container and pipeline materials, and it is one of the keys to study the corrosion of molten salts on contact materials under long-term high-temperature environments and multiple cooling and heating cycles.

[0004] However, the current research on the cooling and heating cycle performance of molten salts often faces high temperatures as high as 800 to 900 degrees Celsius, a large number of heating-cooling cycles (thousands or even tens of thousands of times) and a long experimental cycle (several months, up to a year). two years) and other difficulties

If conventional equipment such as muffle furnace is used instead, not only the cooling rate is slow, the experiment intensity is high, the high temperature is dangerous, the experimenter is prone to fatigue, and the experimental data is rough

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