CN102915777A - Liquid metal sodium boiling two-phase thermal-hydraulic test loop system and test method thereof - Google Patents
Liquid metal sodium boiling two-phase thermal-hydraulic test loop system and test method thereof Download PDFInfo
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- CN102915777A CN102915777A CN2012103812882A CN201210381288A CN102915777A CN 102915777 A CN102915777 A CN 102915777A CN 2012103812882 A CN2012103812882 A CN 2012103812882A CN 201210381288 A CN201210381288 A CN 201210381288A CN 102915777 A CN102915777 A CN 102915777A
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Abstract
The invention discloses a liquid metal sodium boiling two-phase thermal-hydraulic test loop system and a test method thereof. The loop system is divided into three parts comprising a high temperature part, a low temperature part and an argon branch, wherein the low temperature part comprises a sodium storage tank, an electromagnetic pump, an electromagnetic flowmeter, a purification cold trap, four sodium valves and corresponding connecting pipelines; the low temperature part is made of 316L stainless steel; the high temperature part comprises a regeneration heater, a preheater, a test section, an upper expansion box and corresponding connecting pipelines; the high temperature part is made of Incoloy 800 and allows the operating temperature to reach 1,200 DEG C; and the argon branch comprises an argon bottle, an expansion pressure stabilizing box, a vacuum pump, three pressure gauges, ten vacuum diaphragm valves and corresponding connecting pipelines. The system is suitable for operating at high temperature, has a good sealing property and can realize analysis and research on the liquid metal sodium boiling two-phase heat exchange flow characteristic by adding different test sections and a data acquisition system.
Description
[technical field]
The invention belongs to Engineering Thermophysics and energy utilization ambit, particularly a kind of liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system.
[background technology]
Liquid metal sodium is the coolant material of fast neutron reactor first-selection, and its boiling diphasic flow heat transfer characteristic is significant for the forecast analysis of the safe operation of the cold fast neutron reactor of sodium and accident conditions.In order accurately objectively to obtain the data of liquid metal sodium boiling diphasic flow heat transfer characteristic, must set up corresponding experimental loop device.Because liquid metal sodium boiling point high (under the normal pressure near 900 ℃), chemical property is very active, and therefore corresponding experimental loop is very high in the requirement of high temperature resistant and sealing property.
For example, Chinese patent is announced CN101807441A number a kind of high-temperature sodium heat-convection test loop is provided, comprise primary heat transport system, storage sodium tank, advance sodium row sodium system, blanketing gas purifies and vacuum system, sampling cabinet and temperature control system, it can discharge the higher sodium of impurity content in the loop, again can the higher new sodium of can purity; Not only keep the impermeability in loop but also so that gas phase test space operating walk way is unified unimpeded, can carry out simultaneously the corrosion test of sodium and sodium vapor; Sampling cabinet can be finished the loading or unloading operation of sample all the time and not be subjected to air pollution under argon shield atmosphere.But, this loop mainly is the corrosive property after impurity enters in order to test sodium and to move under hot environment, for flow, the physical quantitys such as pressure lack corresponding control and detection means, can't finish the analysis and research for liquid metal sodium boiling diphasic flow heat transfer characteristic.
And for example, Chinese patent application 201110175944.9 provides a kind of liquid sodium metal thermohydraulic experimental loop system, and this circuit system comprises fills with sodium system, loop body, vacuum system, argon system and glove box; Wherein fill with sodium system and comprise molten sodium tank, sodium filtrator; The loop body mainly comprises storage sodium tank, pump box, main electromagnetic pump, auxiliary electromagnetic pump, primary heater, test section, heating radiator, verification cylinder and cold-trap; Glove box mainly comprises sodium sample examination device.This system can realize filling with the sodium operation; The analysis of liquid metal sodium heat exchange flow characteristics; The liquid metal sodium in-line purification; The demarcation of electromagnetic flowmeter; The multiple functions such as the sample analysis of liquid metal sodium and detection.But, this is invented described loop and moves thermal characteristics design for research liquid metal sodium single-phase flow, the highest permission running temperature in loop is lower than 600 ℃, is lower than the liquid metal sodium boiling temperature, therefore is not suitable for the analysis and research of liquid metal sodium boiling diphasic flow heat transfer characteristic.
[summary of the invention]
The object of the present invention is to provide a kind of liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system, to remedy the deficiency of above-mentioned technology, realize the analysis and research of liquid towards sodium metal boiling diphasic flow heat transfer characteristic.
To achieve these goals, the present invention adopts following technical scheme:
A kind of liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system comprises high-temperature part, low temperature part and argon gas branch road; Wherein,
Low-temp. portion divides and comprises storage sodium tank, electromagnetic pump and purification cold trap;
High-temperature part comprises regenerative heater, primary heater, test section and upper expansion case;
The argon gas branch road comprises argon bottle, expansion pressurizer tank and vacuum pump;
Storage sodium tank goes out sodium channel and extends to the first Tee Joint Point from storing up after stretch out the sodium tank top, and storage sodium tank goes out welding the first sodium valves on the sodium channel; The electromagnetic pump outlet conduit links to each other with the first Tee Joint Point through the second sodium valves, the first Tee Joint Point is connected by pipeline with regenerative heater shell-side entrance, the outlet of regenerative heater shell-side links to each other with the primary heater entrance, the primary heater outlet links to each other with the test section entrance, the test section outlet is welded to connect with the upper expansion case, the outlet of upper expansion case links to each other with regenerative heater pipe side entrance, and regenerative heater pipe side outlet pipeline extends to the second Tee Joint Point, then links to each other with the electromagnetic pump inlet duct to consist of the loop; Parallel pumps bypass between electromagnetic pump is imported and exported is regulated by the 3rd sodium valves on it; Between the first Tee Joint Point and the second Tee Joint Point purification cold trap is set, is regulated by the 4th sodium valves; Argon bottle links to each other with storage sodium tank by the 3rd air valve, links to each other with the upper expansion case by the 6th air valve; Vacuum pump links to each other with the expansion pressurizer tank by the 9th sodium valves, and the expansion pressurizer tank links to each other with the upper expansion case by the tenth air valve.
The present invention further improves and is: in storage sodium tank and the upper expansion case the first level probe and the second level probe are set respectively.
The present invention further improves and is: difference assembling pressure table and respective row air valve on storage sodium tank, upper expansion case and the expansion pressurizer tank.
The present invention further improves and is: the pipeline that connects the first Tee Joint Point and regenerative heater shell-side entrance is provided with electromagnetic flowmeter.
The present invention further improves and is: the material of described low temperature part is the 316L stainless steel.
The present invention further improves and is: the material of described high-temperature part is Incoloy800.
The present invention further improves and is: storage sodium tank goes out sodium channel one end and extends to distance apart from storage sodium pot bottom 150mm place.
Experimental technique based on liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system may further comprise the steps:
Sodium is filled in the loop:
Before the loop start, all air valves of loop, sodium valves is in closed condition; First storage sodium tank internal solid sodium metal is carried out preheating, treat temperature increase to 200 ℃; Then loop each several part pipeline is carried out preheating, loop low temperature part and high-temperature part are all reached between 200 ℃ to 300 ℃; The Three pressures table is communicated with storage sodium tank, upper expansion case and expansion pressurizer tank by the first air valve, the 5th air valve and the 7th air valve respectively; Thereby open the first air valve, the 5th air valve and the 7th air valve and can observe respectively storage sodium tank, upper expansion case and expansion pressurizer tank internal pressure by tensimeter; Open all first sodium valves, the second sodium valves, the 3rd sodium valves and the 4th sodium valves, make loop low temperature part and high-temperature part UNICOM; Be communicated with the 4th air valve on the upper expansion case, open the 3rd air valve and be filled with argon gas by argon bottle in the storage sodium tank and pressurize, opening simultaneously the 4th air valve is the exhaust of upper expansion case, and liquid metal sodium is entered whole loop by storage sodium tank pressure; Treat that closing the first sodium valves when Liquid Sodium arrives predetermined fluid level in the upper expansion case stops to press sodium; Closing the 3rd air valve and the 4th air valve finishes the loop and fills sodium;
Loop start and operation:
Open electromagnetic pump, make that liquid metal sodium circulates in the loop under the driving of electromagnetic pump; By regulating the flow of the 4th sodium valves control cold-trap place branch road, by regulating the 3rd sodium valves and the second sodium valves control electromagnetic pump rate of discharge, thereby regulate the Liquid Sodium flow velocity of the test section of flowing through, the pipeline that connects the first Tee Joint Point and regenerative heater shell-side entrance is provided with electromagnetic flowmeter, observes the Liquid Sodium flow velocity by electromagnetic flowmeter; Promote loop high-temperature part liquid metal sodium temperature by promoting the primary heater electrical heating power, until the test section inlet temperature reaches the testing requirements temperature;
Test:
Open the 9th air valve, the tenth air valve, opening vacuum pump is that expansion pressurizer tank and upper expansion case vacuumize; Keep flow velocity, pressure and temperature in the test section, then the interior electrical heating elements power of adjusting test section is until the acquisition test the data obtained appears in the boiling diphasic flow;
The loop is closed:
After Test Data Collecting is complete, close vacuum pump, close the tenth air valve; Reduce loop each several part heating power, when treating that the liquid metal sodium temperature is reduced to 300 ℃ in the loop, close electromagnetic pump, opening the 6th air valve is that the upper expansion case is filled with argon pressurization, open simultaneously the second air valve and be the step-down of storage sodium tank, liquid metal sodium flows back to storage sodium tank in the loop thereby make; Described the second air valve is communicated with described storage sodium tank; After sodium metal all flows back to storage sodium tank, close closed loop each several part electric heating equipment and all valves.
Experimental technique based on liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system may further comprise the steps:
Sodium is filled in the loop:
Before the loop start, all air valves of loop, sodium valves is in closed condition; First storage sodium tank internal solid sodium metal is carried out preheating, treat temperature increase to 200 ℃; Then loop each several part pipeline is carried out preheating, loop low temperature part and high-temperature part are all reached between 200 ℃ to 300 ℃; The Three pressures table is communicated with storage sodium tank, upper expansion case and expansion pressurizer tank by the first air valve, the 5th air valve and the 7th air valve respectively; Thereby open the first air valve, the 5th air valve and the 7th air valve and can observe respectively storage sodium tank, upper expansion case and expansion pressurizer tank internal pressure by tensimeter; Open all first sodium valves, the second sodium valves, the 3rd sodium valves and the 4th sodium valves, make loop low temperature part and high-temperature part UNICOM; Be communicated with the 4th air valve on the upper expansion case, open the 3rd air valve and be filled with argon gas by argon bottle in the storage sodium tank and pressurize, opening simultaneously the 4th air valve is the exhaust of upper expansion case, and liquid metal sodium is entered whole loop by storage sodium tank pressure; Treat that closing the first sodium valves when Liquid Sodium arrives predetermined fluid level in the upper expansion case stops to press sodium; Closing the 3rd air valve and the 4th air valve finishes the loop and fills sodium;
Loop start and operation:
Open electromagnetic pump, make that liquid metal sodium circulates in the loop under the driving of electromagnetic pump; By regulating the flow of the 4th sodium valves control cold-trap place branch road, by regulating the 3rd sodium valves and the second sodium valves control electromagnetic pump rate of discharge, thereby regulate the Liquid Sodium flow velocity of the test section of flowing through, the pipeline that connects the first Tee Joint Point and regenerative heater shell-side entrance is provided with electromagnetic flowmeter, observes the Liquid Sodium flow velocity by electromagnetic flowmeter; Promote loop high-temperature part liquid metal sodium temperature by promoting the primary heater electrical heating power, until the test section inlet temperature reaches the testing requirements temperature;
Test:
Open the 9th air valve, the tenth air valve, start vacuum pump expansion pressurizer tank and upper expansion case are vacuumized; Close the 9th air valve and vacuum pump after vacuumizing; Open the 6th air valve, be filled with argon gas by argon bottle to the top trunk for expansion, after reaching required pressure, adjusting test section electrical heating elements power is until the acquisition test the data obtained appears in the boiling diphasic flow;
The loop is closed:
After Test Data Collecting is complete, close vacuum pump, close the tenth air valve; Reduce loop each several part heating power, when treating that the liquid metal sodium temperature is reduced to 300 ℃ in the loop, close electromagnetic pump, opening the 6th air valve is that the upper expansion case is filled with argon pressurization, open simultaneously the second air valve and be the step-down of storage sodium tank, liquid metal sodium flows back to storage sodium tank in the loop thereby make; Described the second air valve is communicated with described storage sodium tank; After sodium metal all flows back to storage sodium tank, close closed loop each several part electric heating equipment and all valves.
With respect to prior art, the present invention has the following advantages:
1, the loop high-temperature part can reach 1200 ℃ running temperature, can reach the seethe with excitement requirement of two phase studies of liquid metal sodium fully;
2, take argon arc welding welding between the each several part of loop, can guarantee overall tightness, can reach the seethe with excitement requirement of two phase studies of liquid metal sodium;
3, analyze and research by installing different tests section and data acquisition system (DAS) realization liquid towards sodium metal boiling two-phase heat exchange flow characteristics additional.
Ruuning situation after building up by circuit system proves that above various functions can well be finished in the loop, can realize liquid metal sodium boiling two-phase heat exchange flow characteristics experimental study.
[description of drawings]
Fig. 1 is general structure synoptic diagram of the present invention.
Wherein: 1 is argon bottle; 2 are storage sodium tank; 3 is electromagnetic pump; 4 is purification cold trap; 5 is electromagnetic flowmeter; 6 is regenerative heater; 7 is primary heater; 8 is test section; 9 is the upper expansion case; 10 are the expansion pressurizer tank; 11 is vacuum pump; 1-1 is the first sodium valves; 1-2 is the second sodium valves; 1-3 is the 3rd sodium valves; 1-4 is the 4th sodium valves; 2-1 is the first air valve; 2-2 is the second air valve; 2-3 is the 3rd air valve; 2-4 is the 4th air valve; 2-5 is the 5th air valve; 2-6 is the 6th air valve; 2-7 is the 7th air valve; 2-8 is the 8th air valve; 2-9 is the 9th air valve; 2-10 is the tenth air valve; 3-1 is storage sodium tank level probe; 3-2 is upper expansion case level probe.
[embodiment]
Liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system of the present invention is divided into three parts: high-temperature part, low temperature part, argon gas branch road.Wherein low-temp. portion divides and comprises storage sodium tank 2, electromagnetic pump 3, and purification cold trap 4,5,4 sodium valves of electromagnetic flowmeter and corresponding connecting tube, this part is made by the 316L stainless steel, allows to be limited on the running temperature 400 ℃ (depending on that electromagnetic pump 3 allows running temperature); High-temperature part comprises regenerative heater 6, primary heater 7, and test section 8, upper expansion case 9 and corresponding connecting tube, this part is made by Incoloy800, allows running temperature to reach 1200 ℃; The argon gas branch road comprises argon bottle 1, expansion pressurizer tank 10,11,3 tensimeters of vacuum pump, 10 vacuum diaphragm valves and corresponding connecting tube.
The loop is constructed as follows:
Storage sodium tank 2 goes out sodium channel from apart from storage sodium tank 2 bottom 150mm beginning, extends to Tee Joint Point A by storing up after stretch out at sodium tank 2 tops, goes out welding the first sodium valves 1-1 on the sodium channel.Electromagnetic pump 3 outlet conduits link to each other with Tee Joint Point A through the second sodium valves 1-2, Tee Joint Point A is connected by pipeline with regenerative heater 6 shell-side entrances, arrange electromagnetic flowmeter 5 on it, the outlet of regenerative heater 6 shell-sides links to each other with primary heater 7 entrances, primary heater 7 outlets link to each other with test section 8 entrances, test section 8 outlets are welded to connect with upper expansion case 9,9 outlets of upper expansion case link to each other with regenerative heater 6 pipe side entrances, regenerative heater 6 pipe side outlet pipelines extend to Tee Joint Point B, and then linking to each other with electromagnetic pump 3 inlet ducts consists of the loop.Parallel pumps bypass between electromagnetic pump 3 is imported and exported is regulated by the 3rd sodium valves 1-3 on it; Purification cold trap 4 is set between Tee Joint Point A and the B, is regulated by the 4th sodium valves 1-4.Argon bottle 1 links to each other with storage sodium tank 2 by the 3rd air valve 2-3, links to each other with upper expansion case 9 by the 6th air valve 2-6; Vacuum pump 11 links to each other with expansion pressurizer tank 10 by the 9th sodium valves 2-9, and expansion pressurizer tank 10 links to each other with upper expansion case 9 by the tenth air valve 2-10.Storage sodium tank 2 and upper expansion case 9 interior level probe 3-1 and the 3-2 of arranging respectively.Storage sodium tank 2, difference assembling pressure table and respective row air valve on upper expansion case 9 and the expansion pressurizer tank 10.
Below in conjunction with accompanying drawing structural principle of the present invention and principle of work are elaborated.
Two embodiment of the present invention are introduced in conjunction with Fig. 1 in this part, are respectively under the negative pressure liquid metal sodium boiling two-phase heat exchange flow characteristics test under the heat exchange flow characteristics test of liquid metal sodium boiling two-phase and the specified pressure.
(1) liquid metal sodium boiling two-phase heat exchange flow characteristics test under the negative pressure
In conjunction with Fig. 1, introduce first embodiment of the present invention, liquid metal sodium boiling two-phase heat exchange flow characteristics test under the negative pressure.This experiment is divided into the loop and fills sodium, and loop start and operation are tested, and four steps are closed in the loop.
Sodium is filled in the loop:
By shown in Figure 1, before the loop start, guarantee all air valves of loop, sodium valves is in closed condition.First storage sodium tank 2 internal solid sodium metals are carried out preheating, treat to think that Liquid Sodium reaches the requirement that enters the loop about temperature increase to 200 ℃.Then loop each several part pipeline is carried out preheating, loop low temperature part and high-temperature part are all reached between 200 ℃ to 300 ℃, reach liquid metal sodium and flow temperature required.Open the first air valve 2-1, thereby the 5th air valve 2-5 and the 7th air valve 2-7 can observe respectively storage sodium tank 2, upper expansion case 9 and expansion pressurizer tank 10 internal pressures by tensimeter.Open all sodium valves 1-1,1-2,1-3 and 1-4 make loop low temperature part and high-temperature part UNICOM.Opening the 3rd air valve 2-3 pressurizes to the storage sodium tank 2 interior argon gas that slowly are filled with by argon bottle 1, opening simultaneously the 4th air valve 2-4 is 9 exhausts of upper expansion case, thereby make the pressure reduction that keeps relative stability between storage sodium tank 2 and the upper expansion case 9, liquid metal sodium is pressed into whole loop with more stable speed by storage sodium tank 2.Treat that upper expansion case 9 interior level probe 3-2 hang down the pressure sodium speed that further slows down when the liquid level pilot lamp lights, and treat that closing the first sodium valves 1-1 when the high liquid level pilot lamp of upper expansion case 9 interior level probe 3-2 lights stops to press sodium.Closing the 3rd air valve 2-3 and the 4th air valve 2-4 finishes the loop and fills sodium.
Loop start and operation:
By shown in Figure 1, open electromagnetic pump 3, make that liquid metal sodium circulates in the loop under the driving of electromagnetic pump 3.By regulating the flow of the 4th sodium valves 1-4 control cold-trap 4 place branch roads, by regulating the 3rd sodium valves 1-3 and the second sodium valves 1-2 control electromagnetic pump 3 rates of discharge, the Liquid Sodium flow velocity of test section 8 is observed by electromagnetic flowmeter 5 thereby adjusting is flowed through.Promote loop high-temperature part liquid metal sodium temperature by slow lifting primary heater 7 electrical heating powers, until test section 8 inlet temperatures reach the testing requirements temperature.
Test:
By shown in Figure 1, open the 9th air valve 2-9, the tenth air valve 2-10 opens vacuum pump 11 for expansion pressurizer tank 10 and upper expansion case 9 vacuumize, and makes its vacuum tightness reach necessary requirement.Keep test section 8 interior flow velocitys, pressure, the parameters such as temperature, then adjusting test section 8 interior electrical heating elements power are until the acquisition test the data obtained appears in the boiling diphasic flow.
The loop is closed:
By shown in Figure 1, after Test Data Collecting is complete, close vacuum pump 11, close the tenth air valve 2-10.Slowly reduce loop each several part heating power, when treating that the liquid metal sodium temperature is reduced to 300 ℃ of left and right sides in the loop, close electromagnetic pump 3, opening the 6th air valve 2-6 is that upper expansion case 9 is filled with argon pressurization, open simultaneously the second air valve 2-2 and be 2 step-downs of storage sodium tank, liquid metal sodium flows back to storage sodium tank 2 in the loop thereby make.After sodium metal all flows back to storage sodium tank 2, close closed loop each several part electric heating equipment and sodium valves, air valve.So far, the test of liquid metal sodium boiling two-phase heat exchange flow characteristics is carried out complete under the negative pressure.
(2) liquid metal sodium boiling two-phase heat exchange flow characteristics test under the specified pressure
Liquid metal sodium boiling two-phase heat exchange flow characteristics process of the test basic simlarity under the heat exchange flow characteristics test of liquid metal sodium boiling two-phase and the negative pressure under the specified pressure, sodium is filled in its loop, loop start and operation, it is identical that three step modes of operation are closed in the loop.There is difference in mode of operation when only testing, and now only the step of testing is described.
After loop start and the operation, at first open the 9th air valve 2-9, the tenth air valve 2-10 starts 11 pairs of expansion pressurizer tanks 10 of vacuum pump and upper expansion case 9 and vacuumizes.Close the 9th air valve 2-9 and vacuum pump 11 after vacuumizing.Open the 6th air valve 2-6, be filled with argon gas by argon bottle 1 to top trunk for expansion 9, the 6th sodium valves 2-6 aperture need be controlled in this process, and system pressure is slowly changed, to reach as far as possible accurately control.After reaching required pressure, adjusting test section 8 electrical heating elements power are until the acquisition test the data obtained appears in the boiling diphasic flow.Expansion pressurizer tank 10 plays pressure stabilization function in this process.Parameter acquisition to be tested is complete, carries out the loop shutoff operation, and so far, the test of liquid metal sodium boiling two-phase heat exchange flow characteristics is carried out complete under the specified pressure.
Use and move proof through system circuit, this loop design is reasonable, and security of operation can be finished under the negative pressure liquid metal sodium boiling two-phase heat exchange flow characteristics test under the heat exchange flow characteristics test of liquid metal sodium boiling two-phase and the specified pressure.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of submitting to.
Claims (9)
1. a liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system is characterized in that, comprises high-temperature part, low temperature part and argon gas branch road; Wherein,
Low-temp. portion divides and comprises storage sodium tank (2), electromagnetic pump (3) and purification cold trap (4);
High-temperature part comprises regenerative heater (6), primary heater (7), test section (8) and upper expansion case (9);
The argon gas branch road comprises argon bottle (1), expansion pressurizer tank (10) and vacuum pump (11);
Storage sodium tank (2) goes out sodium channel and extends to the first Tee Joint Point (A) from storing up after stretch out at sodium tank (2) top, and storage sodium tank (2) goes out welding the first sodium valves (1-1) on the sodium channel; Electromagnetic pump (3) outlet conduit links to each other with the first Tee Joint Point (A) through the second sodium valves (1-2), the first Tee Joint Point (A) is connected by pipeline with regenerative heater (6) shell-side entrance, the outlet of regenerative heater (6) shell-side links to each other with primary heater (7) entrance, primary heater (7) outlet links to each other with test section (8) entrance, test section (8) outlet is welded to connect with upper expansion case (9), upper expansion case (9) outlet links to each other with regenerative heater (6) pipe side entrance, regenerative heater (6) pipe side outlet pipeline extends to the second Tee Joint Point (B), and then linking to each other with electromagnetic pump (3) inlet duct consists of the loop; Parallel pumps bypass between electromagnetic pump (3) is imported and exported is regulated by the 3rd sodium valves (1-3) on it; Between the first Tee Joint Point (A) and the second Tee Joint Point (B) purification cold trap (4) is set, (1-4) regulates by the 4th sodium valves; Argon bottle (1) links to each other with storage sodium tank (2) by the 3rd air valve (2-3), links to each other with upper expansion case (9) by the 6th air valve (2-6); Vacuum pump (11) links to each other with expansion pressurizer tank (10) by the 9th sodium valves (2-9), and expansion pressurizer tank (10) links to each other with upper expansion case (9) by the tenth air valve (2-10).
2. liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system according to claim 1 is characterized in that, the first level probe (3-1) and the second level probe (3-2) are set respectively in storage sodium tank (2) and the upper expansion case (9).
3. liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system according to claim 1 is characterized in that storage sodium tank (2), upper expansion case (9) and expansion pressurizer tank (10) upper respectively assembling pressure table and respective row air valve.
4. liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system according to claim 1 is characterized in that the pipeline that connects the first Tee Joint Point (A) and regenerative heater (6) shell-side entrance is provided with electromagnetic flowmeter (5).
5. liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system according to claim 1 is characterized in that the material of described low temperature part is the 316L stainless steel.
6. liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system according to claim 1 is characterized in that the material of described high-temperature part is Incoloy800.
7. liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system according to claim 1 is characterized in that, storage sodium tank (2) goes out sodium channel one end and extends to distance apart from 150mm place, storage sodium tank (2) bottom.
8. based on the experimental technique of liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system claimed in claim 1, it is characterized in that, may further comprise the steps:
(1) sodium is filled in the loop:
Before the loop start, all air valves of loop, sodium valves is in closed condition; First storage sodium tank (2) internal solid sodium metal is carried out preheating, treat temperature increase to 200 ℃; Then loop each several part pipeline is carried out preheating, loop low temperature part and high-temperature part are all reached between 200 ℃ to 300 ℃; The Three pressures table is communicated with storage sodium tank (2), upper expansion case (9) and expansion pressurizer tank (10) by the first air valve (2-1), the 5th air valve (2-5) and the 7th air valve (2-7) respectively; Open the first air valve (2-1), the 5th air valve (2-5) and the 7th air valve (2-7) thus can by tensimeter observe respectively the storage sodium tank (2), upper expansion case (9) and expansion pressurizer tank (10) internal pressure; Open all first sodium valves (1-1), the second sodium valves (1-2), the 3rd sodium valves (1-3) and the 4th sodium valves (1-4), make loop low temperature part and high-temperature part UNICOM; Be communicated with the 4th air valve (2-4) on the upper expansion case (9), opening the 3rd air valve (2-3) is filled with argon gas by argon bottle (1) in storage sodium tank (2) and pressurizes, open simultaneously the 4th air valve (2-4) and be upper expansion case (9) exhaust, liquid metal sodium is pressed into whole loop by storage sodium tank (2); Treat that closing the first sodium valves (1-1) when the interior Liquid Sodium of upper expansion case (9) arrives predetermined fluid level stops to press sodium; Closing the 3rd air valve (2-3) and the 4th air valve (2-4) finishes the loop and fills sodium;
(2) loop start and operation:
Open electromagnetic pump (3), make that liquid metal sodium circulates in the loop under the driving of electromagnetic pump (3); By regulating the flow of the 4th sodium valves (1-4) control cold-trap (4) place branch road, by regulating the 3rd sodium valves (1-3) and the second sodium valves (1-2) control electromagnetic pump (3) rate of discharge, thereby regulate the Liquid Sodium flow velocity of the test section (8) of flowing through, the pipeline that connects the first Tee Joint Point (A) and regenerative heater (6) shell-side entrance is provided with electromagnetic flowmeter (5), observes the Liquid Sodium flow velocity by electromagnetic flowmeter (5); Promote loop high-temperature part liquid metal sodium temperature by promoting primary heater (7) electrical heating power, until test section (8) inlet temperature reaches the testing requirements temperature;
(3) test:
Open the 9th air valve (2-9), the tenth air valve (2-10), open vacuum pump (11) and vacuumize for expansion pressurizer tank (10) and upper expansion case (9); Keep the interior flow velocity of test section (8), pressure and temperature, then the interior electrical heating elements power of adjusting test section (8) is until the acquisition test the data obtained appears in the boiling diphasic flow;
(4) loop is closed:
After Test Data Collecting is complete, close vacuum pump (11), close the tenth air valve (2-10); Reduce loop each several part heating power, when treating that the liquid metal sodium temperature is reduced to 300 ℃ in the loop, close electromagnetic pump (3), open the 6th air valve (2-6) and be filled with argon pressurization for upper expansion case (9), open simultaneously the second air valve (2-2) and be the step-down of storage sodium tank (2), liquid metal sodium flows back to storage sodium tank (2) in the loop thereby make; Described the second air valve (2-2) is communicated with described storage sodium tank (2); After sodium metal all flows back to storage sodium tank (2), close closed loop each several part electric heating equipment and all valves.
9. based on the experimental technique of liquid metal sodium boiling two-phase thermal-hydraulic experiment circuit system claimed in claim 1, it is characterized in that, may further comprise the steps:
(1) sodium is filled in the loop:
Before the loop start, all air valves of loop, sodium valves is in closed condition; First storage sodium tank (2) internal solid sodium metal is carried out preheating, treat temperature increase to 200 ℃; Then loop each several part pipeline is carried out preheating, loop low temperature part and high-temperature part are all reached between 200 ℃ to 300 ℃; The Three pressures table is communicated with storage sodium tank (2), upper expansion case (9) and expansion pressurizer tank (10) by the first air valve (2-1), the 5th air valve (2-5) and the 7th air valve (2-7) respectively; Open the first air valve (2-1), the 5th air valve (2-5) and the 7th air valve (2-7) thus can by tensimeter observe respectively the storage sodium tank (2), upper expansion case (9) and expansion pressurizer tank (10) internal pressure; Open all first sodium valves (1-1), the second sodium valves (1-2), the 3rd sodium valves (1-3) and the 4th sodium valves (1-4), make loop low temperature part and high-temperature part UNICOM; Be communicated with the 4th air valve (2-4) on the upper expansion case (9), opening the 3rd air valve (2-3) is filled with argon gas by argon bottle (1) in storage sodium tank (2) and pressurizes, open simultaneously the 4th air valve (2-4) and be upper expansion case (9) exhaust, liquid metal sodium is pressed into whole loop by storage sodium tank (2); Treat that closing the first sodium valves (1-1) when the interior Liquid Sodium of upper expansion case (9) arrives predetermined fluid level stops to press sodium; Closing the 3rd air valve (2-3) and the 4th air valve (2-4) finishes the loop and fills sodium;
(2) loop start and operation:
Open electromagnetic pump (3), make that liquid metal sodium circulates in the loop under the driving of electromagnetic pump (3); By regulating the flow of the 4th sodium valves (1-4) control cold-trap (4) place branch road, by regulating the 3rd sodium valves (1-3) and the second sodium valves (1-2) control electromagnetic pump (3) rate of discharge, thereby regulate the Liquid Sodium flow velocity of the test section (8) of flowing through, the pipeline that connects the first Tee Joint Point (A) and regenerative heater (6) shell-side entrance is provided with electromagnetic flowmeter (5), observes the Liquid Sodium flow velocity by electromagnetic flowmeter (5); Promote loop high-temperature part liquid metal sodium temperature by promoting primary heater (7) electrical heating power, until test section (8) inlet temperature reaches the testing requirements temperature;
(3) test:
Open the 9th air valve (2-9), the tenth air valve (2-10), start vacuum pump (11) expansion pressurizer tank (10) and upper expansion case (9) are vacuumized; Close the 9th air valve (2-9) and vacuum pump (11) after vacuumizing; Open the 6th air valve (2-6), be filled with argon gas by argon bottle (1) to top trunk for expansion (9), after reaching required pressure, adjusting test section (8) electrical heating elements power is until the acquisition test the data obtained appears in the boiling diphasic flow;
(4) loop is closed:
After Test Data Collecting is complete, close vacuum pump (11), close the tenth air valve (2-10); Reduce loop each several part heating power, when treating that the liquid metal sodium temperature is reduced to 300 ℃ in the loop, close electromagnetic pump (3), open the 6th air valve (2-6) and be filled with argon pressurization for upper expansion case (9), open simultaneously the second air valve (2-2) and be the step-down of storage sodium tank (2), liquid metal sodium flows back to storage sodium tank (2) in the loop thereby make; Described the second air valve (2-2) is communicated with described storage sodium tank (2); After sodium metal all flows back to storage sodium tank (2), close closed loop each several part electric heating equipment and all valves.
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