Experiment apparatus for researching thermal hydraulic characteristics in heating rod bundle channel under dynamic condition

Abstract

The invention provides an experiment apparatus for researching thermal hydraulic characteristics in a heating rod bundle channel under a dynamic condition. An experimental loop system comprises a circulating water pump, a first control ball valve, a preheater, a filter, a first sub-header, an electromagnetic flow meter, a rod bundle channel experiment body, a second sub-header, a condenser and an exhaust valve, the end part of the exhaust valve is connected with the circulating water pump, and the circulating water pump is connected with the first control ball valve and then is provided with a second control ball valve in a parallel manner; a circulating cooling water system comprises a water storage tank, and a cooling water pump and a cooling tower which are respectively connected with the water storage tank, and the end part of the cooling water pump and the end part of the cooling tower are respectively connected with the condenser through pipelines; and a control and data acquisition system comprises an angle sensor, a differential pressure gauge and pressure gauge and thermocouple, a signal acquirer and a computer. The apparatus has the advantages of simplicity, easiness in operation, obtaining of stable experimental data, and facilitation of the scientific research of the flow and heat transfer in the rod bundle channel and the engineering design of a passive safety system.

Description

Technical field [0001] The invention relates to an experimental device suitable for researching thermal hydraulic characteristics in a heating rod bundle channel under dynamic conditions, and is applied in the thermal hydraulic technical field of core rod bundle channels of marine nuclear power plants. Background technique [0002] As a marine power source, nuclear energy has the advantages of high power density, good economic benefits, long battery life, cleanliness, and safety, and has been increasingly valued by major marine equipment countries. With the strategic conception of the 21st century "Maritime Silk Road" and the strategy of building a "maritime power", my country's demand for clean and sustainable ocean resources and energy will become increasingly urgent. In recent years, our country is actively developing surface nuclear power platforms and floating nuclear power plants. Starting from the strategic requirements of maintaining national maritime security, it i...

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Problems solved by technology

[0003] In 2002, Hiroyuki Murata, a special researcher at the National Offshore Technology Research Institute of Japan, published an article "Natural circulation characteristics of a marine reactor in rolling motion and heat transfer in the "core", the article mentions that ships using nuclear propulsion are affected by ocean conditions and their own maneuvers, and are prone to sway and other motions. Swing motions will generate additional acceleration and cause changes in spatial positions, resulting in nuclear reactor systems and The flow and heat transfer characteristics of key equipment change, resulting in changes in the physical characteristics of the core and the operating characteristics of key equipment, which pose a potential threat to the working characteristics and safe operation of the nuclear reactor system

Studies have shown that the influence of swing on the heat transfer characteristics of two-phase natural circulation flow is very complicated, and the calculation formula under traditional static conditions is difficult to apply to ocean conditions

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