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Low-pressure low-high-difference natural circulation test device

A technology of natural circulation and test device, applied in the fields of heat transfer and fluid mechanics, to achieve the effect of easy test operation and rapid initialization

Active Publication Date: 2019-03-26
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on natural circulation systems with low elevation differences, and most of them focus on theoretical analysis.

Method used

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  • Low-pressure low-high-difference natural circulation test device
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  • Low-pressure low-high-difference natural circulation test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] To study the water hammer boundary of the low-pressure, low-height natural circulation device under the coupling condition of power and resistance, the technical plan is: firstly, check whether the valve opening and closing of each circuit of the test device is normal, and keep the regulating valve fully open; close the forced circulation pump 13 and its bypass valve, and establish a natural circulation loop; open the data acquisition system 3, and carry out real-time data acquisition; replenish water from the water supply port 30 to the water tank until the overflow pipeline 19 has water continuously discharged; start the pipeline pump 23, and adjust the bypass Through the pipeline 24, the pumping turbine flowmeter 25 and the return water turbine flowmeter 22 are dynamically balanced; the high temperature limit of the wall surface temperature and the power output are set in the control system 2; when the opening of the regulating valve and the temperature of the inlet fl...

Embodiment 2

[0044] Experimental research on the resistance characteristics of electric heaters and regulating valves under forced circulation conditions. The technical plan is: open the valve of the forced circulation loop and establish the forced circulation loop. The operation mode of the temperature control system is the same as that of technical scheme 1. Turn on the forced circulation pump 13, adjust the valve in front of the forced circulation pump 13 according to the electromagnetic flowmeter 10, change the system flow, and calculate respectively according to the indications of the first differential pressure transmitter 11 and the second differential pressure transmitter 12 The resistance characteristics of the electric heater 1 and the regulating valve 9 under different flow rates, and then obtain the change of the resistance coefficient with the Reynolds number in the range of the laminar flow region, the transition region and the turbulent flow region.

[0045] The present inve...

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Abstract

The invention provides a non-heat-isolation rise section low-pressure low-high-difference natural circulation test device, which comprises an electric heater, a visual system, a lower horizontal section, a data measuring and collection system, a water tank and a temperature control system. The device is used for studying the influence of thermal hydraulic parameters and geometrical structure parameters such as power, supercooling degree, resistance, visual section inclined angle and length-to-diameter ratio on a natural circulation system under the conditions of low pressure and low high difference.

Description

technical field [0001] The invention belongs to the fields of heat transfer and fluid mechanics, and in particular relates to a low-pressure, low-height difference natural circulation test device. Background technique [0002] The passive system has the characteristics of simplifying the system structure, reducing misoperation caused by personnel intervention, inherent safety and good economy. Applying passive technology to the safety system design of nuclear power plants is one of the trends in the rapid development of advanced reactor safety. Natural circulation is an important application of the passive concept, and its main advantage is that it does not need any other fluid machinery during the heat transfer process from the heat source to the heat sink. Therefore, the system based on natural circulation has a simple structure without active parts, is not prone to failure, and has high reliability. In the application of the natural circulation system, due to space cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01M10/00
CPCG01M10/00G01N17/00
Inventor 丁铭孙建闯边浩志曹夏昕冉旭张卓华孙中宁范广铭阎昌琪崔枫
Owner HARBIN ENG UNIV