Liquid metal and high-pressure gas flowing heat exchanging device and liquid metal and high-pressure gas flowing heat exchanging method

Abstract

The invention discloses a liquid metal and high-pressure gas flowing heat exchanging device which comprises a liquid metal loop and a high-pressure gas loop. The invention further discloses a method for exchanging heat by using the heat exchanging device. According to the liquid metal and high-pressure gas flowing heat exchanging device and the liquid metal and high-pressure gas flowing heat exchanging method, a flowing heat exchanging property of a high-temperature liquid lead-bismuth alloy and a flowing heat exchanging property of the high-temperature liquid lead-bismuth alloy with high-pressure helium can be researched, the flowing heat exchanging properties of other high-temperature liquid metals and flowing heat exchanging properties of the other high-temperature liquid metals with a high-pressure gas can be researched, and detailed and reliable data can be provided to a subcritical system which is driven by an accelerator and cooled by adopting a liquid heavy metal and relevant nuclear reactors.

Description

technical field [0001] The invention relates to a liquid metal and high-pressure gas flow heat exchange device. [0002] The invention also relates to a method for exchanging heat using the above device. Background technique [0003] As a clean, safe, economical and sustainable energy source, nuclear energy has been widely accepted by the international community and has become an important choice for energy development in many countries and regions. One of the biggest challenges in using nuclear power to generate electricity is the disposal of spent nuclear waste generated during power production. The long-term risks of spent nuclear fuel mainly come from minor actinide nuclides and long-lived fission products, which need to decay for tens of thousands or even hundreds of thousands of years before their radioactive levels can be reduced to the level of natural uranium ore. Among them, landfilling of spent nuclear waste is a treatment mode commonly used by most nuclear powe...

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Problems solved by technology

[0005] Helium has good thermal conductivity and chemical reaction inertness, and the technology of helium turbine power generation is relatively mature. Through the heat exchange between helium and liquid lead-bismuth alloy, the core heat is obtained for power generation, which is very applicable to the accelerator-driven subcritical system. It is a promising direction, but the flow and heat transfer characteristics of liquid lead-bismuth and its flow and heat transfer characteristics with helium are very complicated, and there are few related research work at home and abroad.

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