CN101858842A - Test method of metal hydride thermal adsorption and desorption of hydrogen cycle life and special device thereof - Google Patents
Test method of metal hydride thermal adsorption and desorption of hydrogen cycle life and special device thereof Download PDFInfo
- Publication number
- CN101858842A CN101858842A CN200910011069A CN200910011069A CN101858842A CN 101858842 A CN101858842 A CN 101858842A CN 200910011069 A CN200910011069 A CN 200910011069A CN 200910011069 A CN200910011069 A CN 200910011069A CN 101858842 A CN101858842 A CN 101858842A
- Authority
- CN
- China
- Prior art keywords
- hydrogen
- valve
- sample
- sample chamber
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a test method of metal hydride thermal adsorption and desorption of hydrogen cycle life and a special device thereof. The test device consists of a gas cycling system, a sample chamber heating and cooling system and a computer data collection and control system. The gas cycling system provides a vacuum environment and high-purity hydrogen source to the test system; the sample chamber heating and cooling system rapidly and circularly heats and cools the test sample; and the computer data collection and control system controls a heating and cooling program to run and controls the opening and closing of relevant electromagnetic valve and electric valve and instantly collect the pressure and temperature signal of the system. While completing the test of the cycle of the metal hydride thermal adsorption and desorption of hydrogen, the system also can test the alloy adsorption and desorption hydrogen performance such as PCT curve and dynamics curve and the constant-temperature adsorption and desorption hydrogen service life in situ.
Description
Technical field
The present invention relates to a kind of material performance test method and testing apparatus thereof, particularly a kind of thermic at hydrogen bearing alloy is inhaled the method for testing and the testing apparatus thereof of putting hydrogen cycle life.
Background technology
At present, for the needs that solve energy crisis and environmental protection, the utilization of Hydrogen Energy becomes the hot issue of material science research.Hydrogen has advantages such as unit mass calorific capacity height, wide material sources, clean and effective, but also there is the problem such as aspects such as Hydrogen Preparation, storage, safety guarantee in the large-scale application Hydrogen Energy.Hydrogen bearing alloy has advantages such as hydrogen storage content is big, energy density is high, safe ready and is considered to one of effective means of following accumulating Hydrogen Energy.Always will utilize the stable at low temperatures hydrogen storage hydrogen of inhaling of alloy in storage hydrogen process, the characteristic of putting hydrogen with pressure stably under the high temperature realizes the storage transhipment of hydrogen.In addition, heat release when utilizing hydrogen bearing alloy to inhale hydrogen, the characteristic of absorbing heat when putting hydrogen can be made into novel refrigeration and heating arrangement is used for the hydride air-conditioning, and the difference that the hydrogen platform presses is put in the suction when utilizing its high low temperature can be used as hydrogen booster equipment.These application of hydrogen bearing alloy all relate to it in high low temperature round-robin usability, therefore, investigate the thermic of hydrogen bearing alloy under different temperatures and inhale that to put the hydrogen circulation be highly significant to the influence of its hydrogen storage property.But existing storage hydrogen proving installation does not possess the ability of the long-term thermic cycle performance of test hydrogen bearing alloy.Chinese patent application " mixed rare earth hydrogen storage alloy hydrogenation characteristic comprehensive test device and method of testing ", application number: 00108000.8 has realized the computer acquisition pressure signal, can test hydrogen bearing alloy pressure-component isothermal curve (PCT), hydrogenation rate (inhaling hydrogen dynamics) also can be put hydrogen to investigate its efflorescence behavior by the suction of manual control hydrogen bearing alloy.Chinese patent application " hydrogen-storage alloy performance comprehensive testing equipment ", application number: 200410050594.3 have realized hydrogen bearing alloy pressure-component isothermal curve (PCT), the dynamic (dynamical) computer acquisition test of Chu Qing, and hydrogen efflorescence test is put in the suction that possesses Automatic Cycle simultaneously.But above-mentioned two patents are not all tested the warm ability of putting the hydrogen cycle performance of inhaling that causes of hydrogen bearing alloy height.
Summary of the invention
The purpose of this invention is to provide a kind of method of testing and specialized equipment thereof of studying metal hydride thermal adsorption and desorption of hydrogen cycle life, the equipment that is provided can realize that the thermic of hydrogen bearing alloy is inhaled and put the hydrogen circulation, and the test of finishing the comprehensive hydrogen storage property of hydrogen bearing alloy such as PCT curve simultaneously, inhaling hydrogen dynamics, constant temperature powder performance.
At first determine thermic round-robin high temperature values T according to the service condition of hydrogen bearing alloy
H, low-temperature values T
L, beta alloy obtains the hydrogen desorption plateau pressure value P of this alloy at high temperature at the PCT of this high low temperature curve respectively
Heq, at the hydrogen sucting platform pressure value P of low temperature
LeqWith saturated suction hydrogen than x, bring above data into following formula, with the sample size that determine to need and the relation of gas dome volume,
M: alloy sample quality g
M: the molal weight g/mol of alloy
V
s: sample chamber volume cm
3
V: gas dome volume cm3, gas dome volume comprise the long-pending and intrinsic volume of connecting tube of dilatation bottle
X: the saturated suction hydrogen ratio of alloy, the saturated suction hydrogen atom molar weight of x=alloy/alloy atom molar weight
ρ: alloy density g/cm
3
R: gas law constant 8.31441Jmol
-1K
-1
T
0: ambient temperature K
T
L, T
HUnit is K, P
Leq, P
HeqUnit is kPa;
The use of adjusting the dilatation gas bomb then to be adapting to gained gas dome volume requirement, with the sample sample chamber of packing into, opens vacuum pump, and sample and whole experimental facilities are carried out closing vacuum pump after the vacuum stripping completely; Open water pump the sample chamber is cooled to the required low temperature of experiment, open the hydrogen cylinder valve, the output pressure of adjusting reduction valve on the hydrogen cylinder makes it be higher than P
Leq, hydrogen cylinder and sample chamber are connected, sample is filled hydrogen make that absorption hydrogen is saturated follow-uply of continuing risingly closes the valve that is connected on the hydrogen cylinder after being depressed into the selected low-temperature pressure value of experiment;
Be the thermic circulation in the experiment of computation interface setting at last, the high temperature T of experiment is set
HWith high temperature retention time t
H, low temperature T
LWith low temperature retention time t
L, cooling water temperature Tc, overtemperature alarm temperature T
A, the cycle index n that need carry out selects to begin circulation, begins the heating cool cycles to sample;
After desired times is finished in the thermic circulation, take out the sample chamber and put into water bath with thermostatic control, sample is inhaled put hydrogen PCT, dynamic (dynamical) test, determine its hydrogen sucking function;
To sample carry out different thermic cycle index n and record its hydrogen sucking function such as saturated hydrogen x respectively, the hydrogen bearing alloy hydrogen reaches and investigates hydrogen x
0Required time is promptly inhaled hydrogen speed t
X0Deng, be horizontal ordinate with n, corresponding hydrogen sucking function index is the ordinate mapping, promptly gets this hydrogen bearing alloy sample at T
L～T
HThe temperature range thermic is inhaled and is put the hydrogen life curve.
The present invention also provides a kind of specialized equipment of method of testing of metal hydride thermal adsorption and desorption of hydrogen cycle life, it is characterized in that this equipment is by gas-circulating system, the sample chamber heating and cooling system, and computer data acquiring and control system are formed.
Wherein gas-circulating system is connected the opened and closed port of T-valve a by the High Purity Hydrogen gas cylinder, the normal ported connection T-valve b of T-valve a, another can open and close port and connect the often ported of T-valve c, one of T-valve c can open and close vacuum pump of port connection, and another can open and close port and lead to atmosphere; The two ends in addition of T-valve b are led to atmosphere and pipe main body respectively, connect a four-way on pipe main body, its excess-three interface of four-way connects valve I, II, valve III respectively, and the valve I is connecting pressure transducer, the valve II is connecting the dilatation bottle, and the valve III is connecting the sample chamber.The sample chamber places the sample chamber heating-cooling device.
The sample chamber heating and cooling system connects solenoid valve, water circulating pump and water tank successively by the sample chamber heating-cooling device, and heat exchanger and temperature sensor are arranged in the water tank, and heat exchanger links to each other with refrigeration machine.
Computer data acquiring and control system are made up of computing machine, Programmable Logic Controller PLC, acquisition module and relay, computing machine is connected with slave computer PLC by serial port, PLC links to each other with temperature sensor with pressure transducer in the system by acquisition module, PLC exports the switch that electric signal is being controlled relay by program, the operation of heater strip, water pump and refrigeration machine in relay control T-valve a, T-valve c, solenoid valve, the sample chamber heating-cooling device.Computing machine is by the communication of Control Software realization and PLC, can realize the setting of experiment parameter, the demonstration and the record of system pressure state of temperature parameter, after the setting program operational factor, PLC can independently realize program run having increased reliability of system operation on computers.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention is characterized in that described sample chamber is welded by stainless steel tube head and red copper storage sample pipe, and there is external thread stainless steel tube head side, and end face has seal groove; Red copper storage sample pipe is the male-tapered structure, and the temperature sensor insertion groove is arranged at the bottom.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention, it is characterized in that described sample chamber heating-cooling device has inner conical copper tube pedestal, there is internal thread the lower end of pedestal, mounted on surface armouring heater strip or the heating tape of being close to pedestal, the circulating water cooling tube is adopted in cooling, and cooling tube is selected flat tube; Cooling tube can closely be fixed on base-plates surface by the mode that the surface is directly twined or welded, inlays, and heater strip and cooling tube are spaced.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention, it is characterized in that adopting temperature sensor to fix by clamp nut and pedestal lower end to the heating cooling thermometric of sample chamber, the temperature probe of temperature sensor inserts the slot of bottom, sample chamber.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention, it is characterized in that the sample chamber heating-cooling device at the outer parcel of pedestal asbestos insulation material, outermost layer is the Stainless Steel Shell that is reserved with heating line, cooling water pipe opening.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention, the data acquisition and the control system that it is characterized in that described testing apparatus are to realize the setting of experiment parameter, the demonstration and the record of system pressure state of temperature parameter at the Control Software interface of computing machine.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention is characterized in that described T-valve a, c can be the electric three-way valves, and T-valve b can be a manual three-way valve, and valve I, II, III can be diaphragm valves.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention, it is characterized in that the one or more four-ways of series connection between four-way and valve III, two ends at these four-ways connect valve respectively, by the dilatation bottle of different range pressure sensors of valve control linkage and different sizes; Can be at terminal one or more sets valve III in parallel of four-way, sample chamber, sample chamber heating-cooling device and solenoid valve.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention is characterized in that being connected a filtrator between High Purity Hydrogen gas cylinder and the T-valve; Be connected a filtrator between valve III and the sample chamber; Be connected a reduction valve between High Purity Hydrogen gas cylinder and the filtrator.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention, it is characterized in that the sample chamber is by the through hole flange, gland nut, filter, the filter hold-down nut, storage sample pipe and copper sealing washer are formed, wherein storing the sample pipe is welded by stainless steel external thread tube head and outer cone copper tube, the bottom end seal of outer cone copper tube and leave the temperature sensor thermometer hole, stainless steel external thread tube head sealing surface has enough hardness to use copper sealing ring, and the while threaded body has sufficient intensity and prevents to seal the damage of tightening tube head; By the filter hold-down nut filter embedding is pressed into inside in the lower end pore of through hole flange, brings gas pipeline into air-flow to prevent sample powder.The assembling of sample chamber: the through hole flange is pressed in the stainless steel male-pipe by copper sealing ring by gland nut.
The specialized equipment of the method for testing of a kind of metal hydride thermal adsorption and desorption of hydrogen cycle life provided by the present invention, the sample chamber pedestal that it is characterized in that described sample chamber heating and cooling system is an inner conical cylinder copper pipe, its outside parcel heating material and cooling tube of closely twining, heating material can be armouring heater strip or heating tape, take winding, parcel or surface to inlay modes such as welding and closely contact, guarantee heat-transfer effect fast with the copper pipe pedestal; Cooling tube is flat or the cylinder copper pipe, takes closely to twine parcel or inlay on the surface, welding manner combines with the copper pipe pedestal; Heating material and cooling tube are taked closely alternately to arrange or the about staggered base-plates surface that is packaged in.Wrap up with insulation material in the heating-cooling coil outside, outermost layer encapsulates with stainless steel sleeve, and stainless steel sleeve leaves the gateway of heating supply lines and cooling water pipe.Heating system cooperates heating schedule to realize that firing rate is fast by solid-state commutator, and temperature control is accurate.Cooling system is the recirculated water cooling, by electric water pump cold water is circulated to reach the cooling purpose in cooling copper tube, and constant cooling effect is that water tank is equipped with heat exchanger in order to keep fast simultaneously.
Principle of work of the present invention:
1. thermic loop test principle: hydrogen-storage alloy has lower suction to put the hydrogen platform at low temperature to press, and raises to inhale with temperature and puts the hydrogen platform and press and all can constantly raise.To the hydrogen bearing alloy of putting into the sample chamber at low temperature T
LGiven Hydrogen Vapor Pressure is to P down
L, and P
LSuction hydrogen platform far above the alloy under this temperature is pressed P
LeqThen next the saturated suction hydrogen of sample make sample heat up and arrive a certain temperature T
H, this moment, system pressure rose to P
H, as if P this moment
HWell below the hydrogen desorption plateau pressure P of alloy under this temperature
HeqThen sample is put hydrogen more completely.Above process has realized promptly that thermic of alloy sample is inhaled puts hydrogen, can realize alloy thermic loop test to this sample heating cooling down operation repeatedly.By said process as can be known: can alloy sample realize that thermic is inhaled and put the hydrogen circulation and depend on sample size m, and the saturated suction hydrogen of alloy is than x, high and low temperature scope, gas dome volume V.Under the alloy actual service conditions, the serviceability temperature scope is specific, i.e. T
L, T
HKnown, if low temperature hydrogen sucting platform pressure and high temperature hydrogen desorption plateau pressure are thermic round-robin emergent pressure, put hydrogen when supposing high temperature fully, we just can obtain following formula according to the system's amounts of hydrogen conservation before and after the thermic and determine sample quality and equipment needed thereby gas dome volume corresponding relation:
After the arrangement:
M: alloy sample quality (g)
M: the molal weight of alloy (g/mol)
V
s: the volume (cm of sample chamber
3)
V: gas dome volume (cm
3)
X: the saturated suction hydrogen ratio of alloy, the saturated suction hydrogen atom molar weight of x=alloy/alloy atom molar weight
ρ: the density (g/cm of alloy
3)
R: gas law constant (8.31441Jmol
-1K
-1)
T
0: ambient temperature (K)
T
L, T
HUnit is K, P
LEq, P
HEqUnit is KPa
Can calculate the corresponding relation of alloy sample quality and system bulk according to above equation, put hydrogen and can reduce the amount of sample in right amount or increase system bulk by opening the dilatation gas cylinder for inhaling more completely.
2. constant temperature loop test principle: set the suction hydrogen pressure of alloy by the top hole pressure of regulating reduction valve, water bath with thermostatic control or oil bath are put in the sample chamber.Automatically control sample chamber connection source of the gas by motorized valve and make sample inhale hydrogen, motorized valve connection relief port sample is put hydrogen extremely near barometric pressure range, and motorized valve is connected vacuum pump makes sample put hydrogen completely.Repeat above step and can realize that promptly the suction of alloy sample under steady temperature put hydrogen circulation, investigate its hydrogen storage property.
3. inhale the test philosophy of putting hydrogen PCT curve: sample is put into water bath with thermostatic control or oil bath, use vacuum pump to vacuumize and make the complete dehydrogenation of sample.Close the sample chamber valve,, close source of the gas system's gas dome pressurising, open the sample chamber valve, make sample inhale hydrogen, treat after the pressure equilibrium to calculate the hydrogen of sample according to the pressure and temp value before and after the suction hydrogen of computer acquisition by the equation of gas state, repeating above process, to inhale hydrogen until sample saturated.Put the hydrogen process promptly makes sample slowly put hydrogen the pressure minimizing of gas dome at every turn.With each equilibrium pressure masterpiece ordinate, the sample hydrogen that records is the horizontal ordinate mapping, promptly gets the suction of sample under this temperature and puts hydrogen PCT curve.
4. the test philosophy of kinetic curve: sample is put into water bath with thermostatic control or oil bath, use vacuum pump to the complete dehydrogenation of sample.Close the sample chamber valve, to the hydrogen of the sufficient enough pressure of system gas dome, opening the sample chamber valve fast, to make sample once inhale hydrogen saturated.Computer acquisition system is inhaled the hydrogen process to sample and is write down its pressure and temp value with the short time interval, calculate each hydrogen constantly by the equation of gas state, with the sample hydrogen is ordinate, and the time is the horizontal ordinate mapping, promptly gets the kinetic curve of sample under this temperature.
Advantage of the present invention:
1. realize reliable procedure auto-control: the present invention realizes data acquisition and control automatically with PLC and analog quantity load module, control interface with the computer realization close friend, easy operating, the realization of program function does not rely on the computing machine support, makes control procedure more reliable.
2. the real-time measurement and the control monitoring of data have been realized: carry out in the process in experiment, computer real-time shows pressure and temp value and the on off state that heats the state of cooling and each solenoid valve, motorized valve, and with the temperature, pressure data storage on hard disc of computer, realize the inquiry of historical data function.
3. the thermic rate of circulation is fast, and temperature control is accurate, and is energy-efficient.The present invention is to the unique design of the taper fit of sample chamber and heating base thereof, the use of red copper material, guaranteed the Fast Heating heat transfer, bottom, temperature sensor head embedding sample chamber has guaranteed the accurate of thermometric, and heating schedule configuration solid-state commutator has guaranteed the accurately quick of heating; Adopt heat exchanger to guarantee that water temperature does not raise with the round-robin number of times to chilled water, also can realize being lower than the chilling temperature of room temperature.
4. realize abundant hydrogen storage property test function: the thermic circulation of collection hydrogen bearing alloy, constant temperature is inhaled and to be put the hydrogen circulation, inhale and put hydrogen PCT, inhale hydrogen desorption kinetics and test in one, can inhale thermic round-robin sample at any time and put hydrogen PCT, kinetic test according to the research needs, therefore can study of the influence of thermic cycle index easily the hydrogen storage property of sample.
5. measuring accuracy height: this experimental facilities adopts imported valve piping system, released gas rate＜4 * 10
-9Std cm
3/ s, the pressure unit precision is 0.1%FS, long-time stability＜0.1%FS/.
6. the working pressure temperature range is wide: heating-up temperature is the highest 500 ℃, and minimum 0 ℃ of chilling temperature can select for use different range sensors combinations to realize 10 as required
-3The pressure test of Pa～12MPa scope.
7. cost is low: adopt heating material directly equipment cost to be saved in sample chamber heating and water-cooled way greatly by heating base.
8. safe: can be to heating excess temperature, warning out of control, as required automatically to firing equipment outage and startup cooling-water pump.
9. can be simultaneously two and two above samples be carried out the thermic circulation, energy-efficient.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the sample chamber design drawing;
Fig. 3 is the sample chamber heating-cooling device;
Fig. 4 is computer acquisition and control principle figure;
Fig. 5 is La
0.8Y
0.2Ni
4.8Mn
0.2Alloy storage hydrogen life curve figure.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, the gas-circulating system of this system is formed by connecting by high pressure High Purity Hydrogen gas cylinder (1), reduction valve (2), filtrator (3), motorized valve (4,5), hand valve (8) and pipeline.Specifically be connected to: high pressure High Purity Hydrogen gas cylinder (1) is connected first of electric T-shaped valve (4) behind reduction valve (2) and filtrator (3) can open and close interface, second of electric T-shaped valve (4) can open and close interface and link to each other with the interface of often opening of electric T-shaped valve (5), first of electric T-shaped valve (5) can open and close interface and link to each other with retaining valve (6) air intake opening, and second of the gas outlet connection atmospheric exhaust mouth of retaining valve (6), electric T-shaped valve (5) can open and close interface and link to each other with oil-sealed rotary pump (7).Often the opening interface and can open and close interface with first of manual three-way valve (8) and link to each other of electric T-shaped valve (4), second of manual three-way valve can close interface and be connected with open to atmosphere gas exhaust duct, often opens interface and is connected with diaphragm valve (9).Diaphragm valve (9) connects a four-way (10), and first side position interface of four-way (10) connects a diaphragm valve (11), and another interface of diaphragm valve (11) connects 4MPa tensimeter (12); Second side position interface of four-way (10) connects diaphragm valve (13), and another interface of diaphragm valve (13) connects a 280ml gas cylinder (14), and the feed-through locations of four-way connects another four-way (16).First side position interface of four-way (16) connects a diaphragm valve (17), and another interface of diaphragm valve (17) connects 12MPa tensimeter (18); Second side position interface of four-way (16) connects diaphragm valve (19), and another interface of diaphragm valve (19) connects a 80ml gas cylinder (20).Four-way (16) connects four-way (21), and its excess-three interface of four-way (21) connects three parallel diaphragm valves (22,23,24) respectively, and three parallel diaphragm valves pass through filter (3) back respectively and connect sample chamber (25).
The design of sample chamber is as shown in Figure 2: this sample chamber is tightly connected by copper backing (34) through gland nut (35) and storage sample pipe by the flange (27) that has welded escape pipe (26).Internal thread hole is opened in the bottom of flange (27), by an external thread nut (29) filter (28) embedding is pressed on the gas outlet, and filter (28) can prevent that sample powder from entering gas pipeline system.Storage sample pipe top is that externally threaded stainless-steel tube (33) is arranged, the bottom is for being drilled with the male-tapered copper tube (32) of thermal resistance thermometer hole (31), two pipes are by excessive alloy technology welding, the benefit that adopts stainless steel-red copper design is that top seal face has enough hardness can use the copper backing sealing, and can use unlikely damage when tightening for a long time, the bottom red copper has good heat conductivility, can heat cooling fast, the hysteresis of minimizing system control saves time, energy.
The sample chamber heating and cooling system: sample chamber heating-cooling device (26) as shown in Figure 3, the male-tapered storage sample pipe (32) of red copper material is inserted in the inner conical copper tube pedestal (38) closely, armouring heater strip (39) and cooling copper tube (40) are being twined in the surface of being close to pedestal (38), as shown in the figure, heater strip (39) and cooling copper tube (40) replace solid matter.Asbestos in the outer wrap of heater strip and cooling tube and do heat preserving and insulating material, at outermost layer is Stainless Steel Shell (42), the bottom uses clamp nut that thermal resistance (37) is screwed on the housing, and the thermometric head of thermal resistance (37) is closely inserted in the thermometer hole (31) of red copper storage sample pipe (32) bottom.The cooling of sample chamber is extracted cold water by self-priming electric water pump (46) from tank (47), connect three solenoid valves (44) respectively to three parallel sample chamber coolings behind four-way (45), and cooling water flow circulates behind the cooling tube of sample chamber and injects tank.For keeping cooling water temperature not with the carrying out and raise of experiment number, use refrigeration machine (50) refrigeration also by heat exchanger (49) to the water cooling in the tank, have thermal resistance (48) to detect water temperature in the tank.
Computer data acquiring and control system:
As shown in Figure 4, computing machine is connected with slave computer PLC by serial port, PLC links to each other with temperature sensor (15,37,48) with pressure transducer (12,18) in the system by acquisition module, acquisition module reads the simulating signal of pressure and temperature and converts digital signal to passes PLC back, and PLC and computing machine communication realize the demonstration and the storage of data.PLC is controlling the switch of relay by program output electric signal, and then the operation of the motorized valve of the pilot-gas circulation system and heating and cooling system, solenoid valve, heater strip, water pump and refrigeration machine, simultaneously the Control and Feedback signal is passed to computing machine, realize that real-time running status shows.
The course of work of the present invention:
1, thermic loop test: at first according to La
0.8Y
0.2Ni
4.8Mn
0.2The service condition of alloy is determined thermic round-robin high temperature values T
H=100 ℃, low-temperature values T
L=0 ℃, beta alloy obtains the hydrogen desorption plateau pressure value P of this alloy at high temperature at the PCT of this high low temperature curve respectively
Heq=1926kPa, at the hydrogen sucting platform pressure value P of low temperature
Leq=94kPa and saturated suction hydrogen are brought above data into formula shown in the principle (1) definite sample size and gas dome volume that needs than x=6.The use of adjusting two dilatation gas bombs is to adapt to the gas dome volume requirement.With the sample sample chamber (25) of packing into, insert experimental system by bump joint, with taper store the sample pipe insert heating base and back and forth the turn sample chamber both are combined closely.Open oil-sealed rotary pump (7), motorized valve (5) is connected vacuum pump, motorized valve (4) is connected motorized valve (5), and manual three-way valve is connected motorized valve (4), opens valve (9,22,23,24).Sample and whole experimental facilities are carried out vacuum stripping completely, in case of necessity can be to the high-temperature sample degasification.Degasification is closed vacuum pump (7), motorized valve (5), diaphragm valve (9) after finishing, and motorized valve (4) is connected source of the gas, opens water pump (46) sample chamber is cooled to the required low temperature of experiment, opens the hydrogen cylinder valve, and the output pressure of adjusting reduction valve (2) makes it be higher than P
Leq, unlatching diaphragm valve (9) fills hydrogen to system makes the saturated follow-up selected low-temperature pressure value of experiment that is depressed into of continuing rising of absorption hydrogen.Be thermic circulation, the high temperature T of experiment in the experiment of computation interface setting
HWith high temperature retention time t
H=10s, low temperature T
LWith low temperature retention time t
L=10s, cooling water temperature Tc=0 ℃, the overtemperature alarm temperature T
A=120 ℃, the cycle index n that need carry out is 5000.Selection begins circulation, and program brings into operation.The first step: heater strip is heated to T to the sample chamber
H, and keep t
HSecond, second step: close the heater strip power supply, open water pump and corresponding sample chamber solenoid valve, the sample chamber is cooled to T
L, and keep t
LSecond.Counter shows and to have finished n round-robin the 1st time after finishing, and so repeats above step, finishes the play cuing alarm until circulation.In system's thermic cyclic process, exceed alarm temperature T if temperature occurs
A, then the hard closing heating power supply is opened cooling pump, and reports to the police.Refrigeration machine was opened the water quench in the tank when cooling water temperature was higher than Tc, guaranteed that the experimentation cooling water temperature does not raise.Can be in process of the test by the real-time Presentation Function surveillance temperature, pressure situation of software.
After desired times is finished in the thermic circulation, take out the sample chamber and put into water bath with thermostatic control, sample is inhaled put hydrogen PCT, dynamic (dynamical) test, determine its hydrogen sucking function;
Again sample is proceeded thermic and is circulated to frequency n and is respectively 10000,15000,20000,25000,30000,35000, and record its hydrogen sucking function such as saturated hydrogen x respectively, the hydrogen bearing alloy hydrogen reaches and investigates hydrogen x
0Required time is promptly inhaled hydrogen speed t
X0Deng, be horizontal ordinate with n, corresponding hydrogen sucking function index is the ordinate mapping, promptly gets this hydrogen bearing alloy sample at T
L～T
HThe temperature range thermic is inhaled and is put the hydrogen life curve.Figure 5 shows that La
0.8Y
0.2Ni
4.8Mn
0.2Alloy hydrogen storage capability life curve.
2, constant temperature loop test: sample given vent to anger water bath with thermostatic control or oil bath are put in the sample chamber after finishing, close the preceding ball valve of gas cylinder (14,20), adjust circulating pressure by the gas cylinder reduction valve, open diaphragm valve (9), sample chamber valve (22,23,24) (also can select Open valve) according to need round-robin sample.In computation layout setting recycle design is the constant temperature circulation, is provided with and fills hydrogen time t
1, put hydrogen time t
2, pumpdown time t
3, cycle index n selects to begin circulation, and program brings into operation.Operational process is as follows: the first step, fill hydrogen.Motorized valve (4) is connected source of the gas, keeps t
1Second, close motorized valve (4).Second step, venting.Motorized valve (5) is connected atmosphere, and motorized valve (4) is connected motorized valve (5), and atmosphere is put hydrogen t
2Second.Close motorized valve (5).In the 3rd step, vacuumize.Motorized valve (5) is connected oil-sealed rotary pump, and sample is vacuumized t
3Second.Close motorized valve (4) and motorized valve (5).Program is finished a cyclic process, continues to repeat above process n-1 after the step, and program stops and playing alert tones.
3, inhale the mensuration put hydrogen PCT curve: to after the sample degasification sample chamber being put into water bath with thermostatic control or oil bath, close sample chamber early gate and diaphragm valve (9), motorized valve (4) is connected source of the gas, open diaphragm valve (9) charges into certain pressure to hydrogen storage room (promptly by the sample chamber valve to all the connecting pipe volumes between the diaphragm valve (9)) gas, shut-off valve (9), record pressure and temperature parameter is at this moment opened the sample chamber valve, and sample is closed the sample chamber valve after inhaling hydrogen balance.The pressure and temp parameter of record this moment once more, the hydrogen that calculates sample by the equation of gas state according to the pressure and temp parameter and the known each several part volume of front and back.As above operate repeatedly until the saturated suction hydrogen of sample.Subsequently sample is put hydrogen, promptly, note the pressure and temp parameter of at every turn opening after sample is put hydrogen and gas dome balance, the hydrogen desorption capacity of calculation sample under each equalized pressure by the pressure in the gas dome being reduced one by one to atmosphere or use vacuum pump.Hydrogen pressure is put in above suction done ordinate, hydrogen atom is mapped as horizontal ordinate than x in the corresponding alloy, and hydrogen PCT curve is put in the suction that promptly gets sample under this temperature.
4, the kinetic test of sample: to after the thorough degasification of sample water bath with thermostatic control or oil bath being put in the sample chamber, close the sample chamber early gate, motorized valve (4) is connected source of the gas.Control diaphragm valve (9) charges into the Hydrogen Vapor Pressure (can open dilatation gas cylinder (14) or (20) in case of necessity) that enough makes the saturated suction hydrogen of sample to gas dome, closes diaphragm valve (9).Open the sample chamber early gate fast, make sample inhale hydrogen, quick acquisition and recording system pressure of computer and temperature variation are until pressure equilibrium.By the equation of gas state can calculation sample chamber valve opening after the sample hydrogen of each measuring point, be ordinate with the sample hydrogen, the time is the kinetic curve that the horizontal ordinate mapping promptly gets sample.
Claims (10)
1. the method for testing of a metal hydride thermal adsorption and desorption of hydrogen cycle life is characterized in that:
At first determine thermic round-robin high temperature values T according to the service condition of hydrogen bearing alloy
H, low-temperature values T
L, beta alloy obtains the hydrogen desorption plateau pressure value P of this alloy at high temperature at the PCT of this high low temperature curve respectively
Heq, at the hydrogen sucting platform pressure value P of low temperature
LeqWith saturated suction hydrogen than x, bring above data into following formula, with the sample size that determine to need and the relation of gas dome volume,
M: alloy sample quality g
M: the molal weight g/mol of alloy
V
s: sample chamber volume cm
3
V: gas dome volume cm
3, the gas dome volume comprises the long-pending and intrinsic volume of connecting tube of dilatation bottle
X: the saturated suction hydrogen ratio of alloy, the saturated suction hydrogen atom molar weight of x=alloy/alloy atom molar weight
ρ: alloy density g/cm
3
R: gas law constant 8.31441Jmol
-1K
-1
T
0: ambient temperature K
T
L, T
HUnit is K, P
Leq, P
HeqUnit is kPa;
The use of adjusting the dilatation gas bomb then to be adapting to gained gas dome volume requirement, with the sample sample chamber of packing into, opens vacuum pump, and sample and whole experimental facilities are carried out closing vacuum pump after the vacuum stripping completely; Open water pump the sample chamber is cooled to the required low temperature of experiment, open the hydrogen cylinder valve, the output pressure of adjusting reduction valve on the hydrogen cylinder makes it be higher than P
Leq, hydrogen cylinder and sample chamber are connected, sample is filled hydrogen make that absorption hydrogen is saturated follow-uply of continuing risingly closes the valve that is connected on the hydrogen cylinder after being depressed into the selected low-temperature pressure value of experiment;
Be the thermic circulation in the experiment of computation interface setting at last, the high temperature T of experiment is set
HWith high temperature retention time t
H, low temperature T
LWith low temperature retention time t
L, cooling water temperature Tc, overtemperature alarm temperature T
A, the cycle index n that need carry out selects to begin circulation, begins the heating cool cycles to sample;
After desired times is finished in the thermic circulation, take out the sample chamber and put into water bath with thermostatic control, sample is inhaled put hydrogen PCT, dynamic (dynamical) test, determine its hydrogen sucking function;
To sample carry out different thermic cycle index n and record its hydrogen sucking function such as saturated hydrogen x respectively, the hydrogen bearing alloy hydrogen reaches and investigates hydrogen x
0Required time is promptly inhaled hydrogen speed t
X0Deng, be horizontal ordinate with n, corresponding hydrogen sucking function index is the ordinate mapping, promptly gets this hydrogen bearing alloy sample at T
L～T
HThe temperature range thermic is inhaled and is put the hydrogen life curve.
2. the specialized equipment of the described metal hydride thermal adsorption and desorption of hydrogen cycle life method of testing of claim 1 is characterized in that: described testing apparatus is by gas-circulating system, the sample chamber heating and cooling system, and computer data acquiring and control system are formed;
Gas-circulating system is connected the opened and closed port of T-valve a by the High Purity Hydrogen gas cylinder, the normal ported connection T-valve b of T-valve a, another can open and close port and connect the often ported of T-valve c, and one of T-valve c can open and close vacuum pump of port connection, and another can open and close port and lead to atmosphere; The two ends in addition of T-valve b are led to atmosphere and pipe main body respectively, connect a four-way on pipe main body, its excess-three interface of four-way connects valve I, II, valve III respectively, and the valve I is connecting pressure transducer, the valve II is connecting the dilatation bottle, and the valve III is connecting the sample chamber;
The sample chamber places the sample chamber heating-cooling device;
The sample chamber heating and cooling system connects solenoid valve, water circulating pump and water tank successively by the sample chamber heating-cooling device, and heat exchanger and temperature sensor are arranged in the water tank, and heat exchanger links to each other with refrigeration machine;
Computer data acquiring and control system are made up of computing machine, Programmable Logic Controller PLC, acquisition module and relay, computing machine is connected with slave computer PLC by serial port, PLC links to each other with temperature sensor with pressure transducer in the system by acquisition module, PLC exports the switch that electric signal is being controlled relay by program, the operation of heater strip, water pump and refrigeration machine in relay control T-valve a, T-valve c, solenoid valve, the sample chamber heating-cooling device.
3. according to the specialized equipment of the described metal hydride thermal adsorption and desorption of hydrogen cycle life method of testing of claim 2, it is characterized in that: described sample chamber is welded by stainless steel tube head and red copper storage sample pipe, and there is external thread stainless steel tube head side, and end face has seal groove; Red copper storage sample pipe is the male-tapered structure, and the temperature sensor insertion groove is arranged at the bottom.
4. according to the specialized equipment of the described metal hydride thermal adsorption and desorption of hydrogen cycle life method of testing of claim 2, it is characterized in that: described sample chamber heating-cooling device has inner conical copper tube pedestal, there is internal thread the lower end of pedestal, mounted on surface armouring heater strip or the heating tape of being close to pedestal, the circulating water cooling tube is adopted in cooling, and cooling tube is selected flat tube; Cooling tube can closely be fixed on base-plates surface by the mode that the surface is directly twined or welded, inlays, and heater strip and cooling tube are spaced.
5. according to the described sample chamber of claim 4 heating-cooling device, it is characterized in that: the heating cooling thermometric to the sample chamber adopts temperature sensor to fix by clamp nut and pedestal lower end, and the temperature probe of temperature sensor inserts the slot of bottom, sample chamber.
6. according to the described sample chamber of claim 4 heating-cooling device, it is characterized in that: at the outer parcel of pedestal asbestos insulation material, outermost layer is the Stainless Steel Shell that is reserved with heating line, cooling water pipe opening.
7. according to the specialized equipment of the described metal hydride thermal adsorption and desorption of hydrogen cycle life method of testing of claim 2, it is characterized in that: the data acquisition of described testing apparatus and control system are to realize the setting of experiment parameter, the demonstration and the record of system pressure state of temperature parameter at the Control Software interface of computing machine.
8. according to the specialized equipment of the described metal hydride thermal adsorption and desorption of hydrogen cycle life method of testing of claim 2, it is characterized in that: described T-valve a, c can be the electric three-way valves, and T-valve b can be a manual three-way valve, and valve I, II, III can be diaphragm valves.
9. according to the specialized equipment of the described metal hydride thermal adsorption and desorption of hydrogen cycle life method of testing of claim 2, it is characterized in that: the one or more four-ways of series connection between four-way and valve III, two ends at these four-ways connect valve respectively, by the dilatation bottle of different range pressure sensors of valve control linkage and different sizes; Can be at terminal one or more sets valve III in parallel of four-way, sample chamber, sample chamber heating-cooling device and solenoid valve.
10. according to the specialized equipment of claim 2,9 described metal hydride thermal adsorption and desorption of hydrogen cycle life method of testings, it is characterized in that: be connected a filtrator between High Purity Hydrogen gas cylinder and the T-valve; Be connected a filtrator between valve III and the sample chamber; Be connected a reduction valve between High Purity Hydrogen gas cylinder and the filtrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100110693A CN101858842B (en) | 2009-04-08 | 2009-04-08 | Test method of metal hydride thermal adsorption and desorption of hydrogen cycle life and special device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100110693A CN101858842B (en) | 2009-04-08 | 2009-04-08 | Test method of metal hydride thermal adsorption and desorption of hydrogen cycle life and special device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101858842A true CN101858842A (en) | 2010-10-13 |
| CN101858842B CN101858842B (en) | 2012-01-25 |
Family
ID=42944868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100110693A Expired - Fee Related CN101858842B (en) | 2009-04-08 | 2009-04-08 | Test method of metal hydride thermal adsorption and desorption of hydrogen cycle life and special device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101858842B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590374A (en) * | 2012-01-29 | 2012-07-18 | 扬州大学 | Test system for hydrogen production by hydrolyzing complex metal hydride in water vapour |
| CN102841189A (en) * | 2011-10-24 | 2012-12-26 | 南通天华和睿科技创业有限公司 | Sample chamber for hydrogen storage alloy |
| CN102838083A (en) * | 2011-10-24 | 2012-12-26 | 南通天华和睿科技创业有限公司 | Circulating device for absorbing and discharging hydrogen through thermally inducing of hydrogen storage alloy |
| CN103752835A (en) * | 2011-12-31 | 2014-04-30 | 天津三环乐喜新材料有限公司 | Hydrogen circulating system and hydrogen circulating method |
| CN104155425A (en) * | 2014-08-27 | 2014-11-19 | 辽宁永动力能源材料有限公司 | High-precision PCT test instrument and method for testing PCT of hydrogen storage alloy material |
| CN105911244A (en) * | 2016-06-22 | 2016-08-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Testing method, device and system for performance curve of hydrogen storage alloy |
| CN109781579A (en) * | 2018-12-29 | 2019-05-21 | 有研工程技术研究院有限公司 | A kind of hydrogen storage material cycle life auto testing instrument and test method |
| CN110595939A (en) * | 2019-10-30 | 2019-12-20 | 山东京博装备制造安装有限公司 | Hydrogen storage alloy PCT curve testing device and method |
| CN112557158A (en) * | 2021-02-28 | 2021-03-26 | 中国工程物理研究院核物理与化学研究所 | Separation, purification and collection device for xenon in air sample |
| CN113933208A (en) * | 2021-10-13 | 2022-01-14 | 扬州大学 | Hydrogen absorption and desorption cycle life testing device and testing method for hydrogen storage material |
| CN114113194A (en) * | 2021-11-16 | 2022-03-01 | 浙江大学 | Thermal signal testing device and system based on phase change latent heat of solid hydrogen storage and supply material and thermal signal testing and analyzing method |
| CN114233467A (en) * | 2021-12-17 | 2022-03-25 | 中船动力镇江有限公司 | Diesel engine supercharged air bypass controller and control method thereof |
| US11307129B2 (en) | 2020-03-23 | 2022-04-19 | Savannah River Nuclear Solutions, Llc | Automatic gas sorption apparatus and method |
| CN114955987A (en) * | 2022-05-16 | 2022-08-30 | 宜兴氢枫能源技术有限公司 | Self-judgment highest-efficiency hydrogen absorption and desorption control method for solid-state hydrogen storage system |
| CN116242734A (en) * | 2022-12-26 | 2023-06-09 | 有研(广东)新材料技术研究院 | Automatic cycle hydrogen charging and discharging and hydrogen charging and discharging performance test system of metal hydride hydrogen storage tank |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100487459C (en) * | 2004-10-15 | 2009-05-13 | 中国科学院金属研究所 | Hydrogen storage alloy performance integrated experimental apparatus |
| CN101858841B (en) * | 2009-04-08 | 2012-03-21 | 中国科学院金属研究所 | Metal hydride thermal adsorption and desorption hydrogen cycling comprehensive test device |
-
2009
- 2009-04-08 CN CN2009100110693A patent/CN101858842B/en not_active Expired - Fee Related
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841189A (en) * | 2011-10-24 | 2012-12-26 | 南通天华和睿科技创业有限公司 | Sample chamber for hydrogen storage alloy |
| CN102838083A (en) * | 2011-10-24 | 2012-12-26 | 南通天华和睿科技创业有限公司 | Circulating device for absorbing and discharging hydrogen through thermally inducing of hydrogen storage alloy |
| CN103752835A (en) * | 2011-12-31 | 2014-04-30 | 天津三环乐喜新材料有限公司 | Hydrogen circulating system and hydrogen circulating method |
| CN102590374A (en) * | 2012-01-29 | 2012-07-18 | 扬州大学 | Test system for hydrogen production by hydrolyzing complex metal hydride in water vapour |
| CN104155425A (en) * | 2014-08-27 | 2014-11-19 | 辽宁永动力能源材料有限公司 | High-precision PCT test instrument and method for testing PCT of hydrogen storage alloy material |
| CN104155425B (en) * | 2014-08-27 | 2016-03-02 | 辽宁永动力能源材料有限公司 | A kind of method of high precision PCT tester and test alloy material storing hydrogen PCT |
| CN105911244A (en) * | 2016-06-22 | 2016-08-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Testing method, device and system for performance curve of hydrogen storage alloy |
| CN105911244B (en) * | 2016-06-22 | 2018-11-13 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of test method of the performance curve of hydrogen bearing alloy, apparatus and system |
| CN109781579A (en) * | 2018-12-29 | 2019-05-21 | 有研工程技术研究院有限公司 | A kind of hydrogen storage material cycle life auto testing instrument and test method |
| CN109781579B (en) * | 2018-12-29 | 2021-04-02 | 有研工程技术研究院有限公司 | Automatic tester and testing method for cycle life of hydrogen storage material |
| CN110595939A (en) * | 2019-10-30 | 2019-12-20 | 山东京博装备制造安装有限公司 | Hydrogen storage alloy PCT curve testing device and method |
| CN110595939B (en) * | 2019-10-30 | 2024-02-06 | 山东京博装备制造安装有限公司 | Device and method for testing PCT curve of hydrogen storage alloy |
| US11307129B2 (en) | 2020-03-23 | 2022-04-19 | Savannah River Nuclear Solutions, Llc | Automatic gas sorption apparatus and method |
| CN112557158A (en) * | 2021-02-28 | 2021-03-26 | 中国工程物理研究院核物理与化学研究所 | Separation, purification and collection device for xenon in air sample |
| CN112557158B (en) * | 2021-02-28 | 2021-05-28 | 中国工程物理研究院核物理与化学研究所 | Separation, purification and collection device for xenon in air sample |
| CN113933208A (en) * | 2021-10-13 | 2022-01-14 | 扬州大学 | Hydrogen absorption and desorption cycle life testing device and testing method for hydrogen storage material |
| CN114113194A (en) * | 2021-11-16 | 2022-03-01 | 浙江大学 | Thermal signal testing device and system based on phase change latent heat of solid hydrogen storage and supply material and thermal signal testing and analyzing method |
| CN114233467A (en) * | 2021-12-17 | 2022-03-25 | 中船动力镇江有限公司 | Diesel engine supercharged air bypass controller and control method thereof |
| CN114233467B (en) * | 2021-12-17 | 2024-04-05 | 中船动力镇江有限公司 | Diesel engine boost air bypass controller and control method thereof |
| CN114955987A (en) * | 2022-05-16 | 2022-08-30 | 宜兴氢枫能源技术有限公司 | Self-judgment highest-efficiency hydrogen absorption and desorption control method for solid-state hydrogen storage system |
| CN114955987B (en) * | 2022-05-16 | 2023-08-22 | 宜兴氢枫能源技术有限公司 | Self-judging hydrogen absorption and desorption control method for solid hydrogen storage system |
| CN116242734A (en) * | 2022-12-26 | 2023-06-09 | 有研(广东)新材料技术研究院 | Automatic cycle hydrogen charging and discharging and hydrogen charging and discharging performance test system of metal hydride hydrogen storage tank |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101858842B (en) | 2012-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101858842B (en) | Test method of metal hydride thermal adsorption and desorption of hydrogen cycle life and special device thereof | |
| CN101858841B (en) | Metal hydride thermal adsorption and desorption hydrogen cycling comprehensive test device | |
| CN102809581B (en) | Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection | |
| CN109781579A (en) | A kind of hydrogen storage material cycle life auto testing instrument and test method | |
| CN112326501A (en) | System and method for testing various performances of hydrogen storage material | |
| CN108120657B (en) | device for automatically and synchronously measuring high-pressure gas adsorption capacity and adsorption heat and measuring method | |
| CN107389227B (en) | Device and method for measuring residual heat accumulation of phase-change energy storage material | |
| CN102818731A (en) | Low temperature test system of low temperature stretching tests | |
| CN110595939B (en) | Device and method for testing PCT curve of hydrogen storage alloy | |
| CN100461039C (en) | Automatic control system and method for cyclic test in multiple service positions and at high and low temperatures | |
| CN106950246A (en) | A kind of heat chemistry energy storage reaction experiment device and method of solid-state energy-accumulating medium | |
| CN112285011B (en) | High-temperature high-pressure supercritical carbon dioxide flow accelerated corrosion test system and method | |
| CN113030151B (en) | Device and method for testing liquefaction rate of low-temperature gas liquefaction device | |
| CN213749476U (en) | Hydrogen storage material multiple performance test system | |
| CN102539474B (en) | Device and method for testing adsorption performance of wholly shaped solar refrigerating adsorbent | |
| Jung et al. | Hydrogen monitoring in the heat transfer fluid of parabolic trough plants | |
| CN101852703A (en) | Ultra-low temperature constant temperature grabbing bar device | |
| CN106500762B (en) | A kind of combined type intelligent vacuum drying dynamic experiment platform | |
| CN207036737U (en) | A kind of heat chemistry energy storage reaction experiment device of solid-state energy-accumulating medium | |
| CN212410360U (en) | Hydrogen absorption agent evaluation device for low-temperature container | |
| RU202066U1 (en) | DEVICE FOR TIGHTNESS CONTROL OF LARGE VESSELS | |
| CN205246278U (en) | Low temperature equipment | |
| CN204027735U (en) | Long-rod platinum resistance thermometer calibration device | |
| CN106483275A (en) | A kind of low-temperature biological experimental provision | |
| CN107315025A (en) | The pressure compensation and bleeder of HTHP thermal insulation test process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20140408 |