Pipeline two-phase flow flash evaporation test system and method
A test system and flash evaporation technology, applied in the field of test systems, can solve the problems of stable control and inability to control the pressure and temperature of the flash evaporation section
Active Publication Date: 2021-04-02
SHANGHAI JIAOTONG UNIV +1
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Problems solved by technology
[0005] The existing pipeline two-phase flow flash test system cannot realize the stable control of the pressure and temperature of the upstream and downstream of the flash section, cannot control several influencing factors of the flash, and cannot completely achieve a certain temperature and pressure range Vapor-liquid two-phase flow test in
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[0026] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0027] Such as figure 1 As shown, the pipeline two-phase flow flash test system of the present invention includes a pressure-stabilizing water tank 1, a high-pressure water tank 2, a low-pressure water tank 3, a loop heater 5, a pre-heater 6, a high-pressure water pump 7, a circulating water pump 8, and a casing Type heat exchanger 9, plate heat exchanger 10, nitrogen pressure stabilizing system 11, test section 12, bypass return bypass 13, the input end of the pressure stabilizing water tank 1 is...
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Abstract
The invention provides a pipeline two-phase flow flash evaporation test system and method. The system comprises a stable pressure water tank, the input end of the stable pressure water tank is connected with a nitrogen pressure stabilizing system, the output end of the stable pressure water tank, one end of a preheater and a loop heater are connected with a high pressure water tank, the other end of the preheater, a test segment and a shell-and-tube heat exchanger are connected with a bypassing reflux bypass, a high pressure water pump and the loop heater are connected with the shell-and-tube heat exchanger, and the high pressure water pump, a circulating water pump, the shell-and-tube heat exchanger and a plate heat exchanger are connected with a low pressure water tank. The test system and the method can realize stable control of the pressures and the temperatures of the upstream and the downstream of a flash evaporation segment, can control several influence factors of the flash evaporation, and completely realizes steam and liquid two-phase flow test in a certain temperature range and in a certain pressure range.
Description
technical field [0001] The invention relates to a test system and method, in particular to a pipeline two-phase flow flash test system and method. Background technique [0002] Vapor-liquid two-phase flow phenomenon widely exists in nuclear power, chemical industry, petroleum and other fields. The vapor-liquid two-phase flow and various related two-phase flow phenomena in the secondary circuit system of nuclear power plants may have an impact on system operation and equipment and valve selection under specific operating conditions. For example, in addition to the condenser and other equipment, after the regulating valve of the heater drain system, feed water pump recirculation, condensate pump recirculation, deaerator overflow water and other pipelines, the supercooled water medium will be adjusted by the low pressure recovery The constriction effect and friction of the valve (or reducing the valve opening) cause the pressure of the water flow to drop. If it cannot return t...
Claims
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IPC IPC(8): G01N25/12
CPCG01N25/12
Inventor 刘鹏飞祝洪青匡波陈宝赵男刘军良张贤
Owner SHANGHAI JIAOTONG UNIV