CN107884436A - A kind of performance test methods of phase transition heat accumulation unit - Google Patents
A kind of performance test methods of phase transition heat accumulation unit Download PDFInfo
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- CN107884436A CN107884436A CN201711148711.3A CN201711148711A CN107884436A CN 107884436 A CN107884436 A CN 107884436A CN 201711148711 A CN201711148711 A CN 201711148711A CN 107884436 A CN107884436 A CN 107884436A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
A kind of performance test methods of phase transition heat accumulation unit provided by the invention, performance test is carried out to regenerative apparatus using phase transition heat accumulation unit Performance Test System, specifically refer to be operated in the environment of temperature relative constancy, phase-change material is first encapsulated into regenerative apparatus, then thermal source and thermal insulation are installed, then carry out single point temperature change test, boundary distribution tests respectively.The present invention is simple to operate, can be to the regenerative apparatus progress performance test of packaging phase change material and record data and as the important references index of later stage research.
Description
Technical field
The present invention relates to performance test apparatus field, is a kind of performance test methods of phase transition heat accumulation unit specifically.
Background technology
Using the phase-change heat storage technology that material thing phase change is realized because the thermal storage density of unit volume is big, stores exothermic process temperature
Spend the advantages that constant, phase transition temperature is wide and turn into thermal energy storage mode most with prospects.Moreover, the technology can also be extensive
Applied to multiple engineering fields, more than Solar use, industry（It is useless）Recuperation of heat, the peak load shifting of electric power, electronic device cooling
And energy-conservation of industrial and civil buildings, air-conditioning etc..
But phase-change heat storage technology generally existing one it is fatal the shortcomings that, i.e. phase-change material, especially organic-based material
Low thermal conductivity（The typically smaller than 0.2W/ (mK) of organic-based material, the often less than 0.5W/ (mK) of inorganic）And thus lead
Device is caused to store, the reduction of rate of heat release, which greatly limits the application of this technology.Therefore, relevant phase-change heat transfer
Reinforcement technique have evolved into both at home and abroad heat transfer and energy source use.
Occur a variety of effective augmentation of heat transfer measures in current research, added that metal is contour to lead such as into phase-change material
Hot material, increase micro-packaging technology of heat transfer area and phase-change material etc. using various forms of fins.But these are strengthened
Heat transfer measure does not consider phase-change heat transfer characteristic in itself, while phase-change heat transfer is strengthened, often occurs some its therewith
Its problem, such as cause reduction, the increase of regenerative apparatus volume, weight of thermal storage density.Therefore, carry out and combine phase-change heat transfer sheet
The augmentation of heat transfer research of body characteristic is very necessary.
Phase transition heat accumulation unit augmentation of heat transfer research process, it is necessary to which the performance of regenerative apparatus is tested and remembered
Record, therefore vital effect is played in the formulation of regenerative apparatus performance test methods to follow-up study, should not be underestimated.
The content of the invention
It is an object of the invention to provide a kind of performance test methods of phase transition heat accumulation unit, the performance of regenerative apparatus is entered
Row test, studied in order to the augmentation of heat transfer of massive transformation regenerative apparatus.
The performance test methods of a kind of phase transition heat accumulation unit provided by the invention, using phase transition heat accumulation unit performance test system
System carries out performance test to regenerative apparatus, and the phase transition heat accumulation unit Performance Test System includes being surrounded by multiple warming plates being formed
The casing of one rectangular inner cavity and PID temperature control systems, the temp measuring system being separately mounted on casing, the PID temperature control systems
Including connected by signal wire heating plate, A.C. contactor, temperature control instrument, temperature-sensing probe, the temperature control outside casing
Instrument is arranged on the heating plate on the vertical wall in inner chamber one by A.C. contactor connection, for monitoring the sense of temperature of heating plate
The output end access temperature control instrument of temperature probe, the input of the temp measuring system are fixed on warming plate and in test box bodies
The temperature of chamber, the temp measuring system include be sequentially connected thermocouple, data collecting system, computer and with data acquisition system
The digital camera of system connection；A side contacts of the heating plate as unique thermal source and regenerative apparatus, regenerative apparatus are warm except setting
Remaining wall beyond the wall in source is adiabatic test surfaces；The performance test methods of the phase transition heat accumulation unit, refer to
Operated in the environment of temperature relative constancy, phase-change material is first encapsulated into regenerative apparatus, then thermal source and thermal insulation are installed, then
Single point temperature change test, boundary distribution tests are carried out respectively.
It is further, described phase-change material is encapsulated into regenerative apparatus to specifically refer to elder generation in order to preferably realize the present invention
Solid phase material is heated and melts it as liquid phase, liquid phase material is then layered by injection regenerative apparatus using needle tubing, injection every time
After being highly 6-8mm and waiting the solidification completely of last layer liquid phase material, then carry out next layer of injection.
In order to preferably realize the present invention, further, it is described phase-change material is encapsulated into regenerative apparatus during, most
Once there is 2-5mm at the top of its distance from top regenerative apparatus after injection liquid phase material afterwards.
In order to preferably realize the present invention, further, the installation thermal source and it is adiabatic, in particular to：Treat regenerative apparatus
Solid phase material be sufficiently cooled to stand a period of time after design temperature, it is first vertically arranged by one of heating plate and regenerative apparatus
Side wall be tightly bonded, then covered with heat-insulation layer and need adiabatic test surfaces.
In order to preferably realize the present invention, further, PID temperature control systems should be also detected after installation thermal source and thermal insulation
Whether the circuit between middle heating plate, A.C. contactor, temperature control instrument, temperature-sensing probe connects well.
In order to preferably realize the present invention, further, the single point temperature change test, boundary distribution tests, tool
Body comprises the following steps：
Step A1：The test point being distributed in matrix form is correspondingly arranged on each test surfaces respectively, each test point is corresponding to be installed
One thermocouple；
Step A2：Each thermocouple is respectively connected to data collecting system, and checks whether data collecting system connects with computer
Connect good；
Step A3：After ready, heat source temperature is adjusted to setting value, heat-accumulating process by PID temperature control systems and thus started,
The temperature of starting stage endogenous pyrogen is rapidly increased to setting value, then keeps constant；During this, thermocouple is with setpoint frequency interval
The temperature information of the corresponding test point of collection.
In order to preferably realize the present invention, further, setpoint frequency refers to that the sampling period is 1min in the step A3.
In order to preferably realize the present invention, further, in step A3, it is also necessary to remove one piece of insulation by the setting moment
Plate, with the solid-liquid phase interface location in digital camera record phase transition heat accumulation unit, the warming plate is recovered to covering immediately after taking pictures
Lid position.
The present invention compared with prior art, has advantages below and beneficial effect：
（1）The present invention carries out performance test by phase transition heat accumulation unit Performance Test System to phase transition heat accumulation unit, can gather single
The related data of point temperature variations and boundary changes in distribution situation, facilitates follow-up study.
（2）The present invention is easy to operate.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the performance test methods of phase transition heat accumulation unit.
Fig. 2 is rectangular cavity regenerative apparatus front view and temperature measuring point distribution schematic diagram in embodiment 2.
Fig. 3 is rectangular cavity regenerative apparatus left view and temperature measuring point distribution schematic diagram in embodiment 2.
Fig. 4 is wedge shape section regenerative apparatus front view and temperature measuring point distribution schematic diagram in embodiment 3.
Fig. 5 is the connection relationship diagram of phase transition heat accumulation unit Performance Test System in the present invention.
Wherein：
1- heating plates；2- A.C. contactors；3- temperature control instruments；4- temperature-sensing probes；5- thermocouples；6- data collecting systems；7- is counted
Calculation machine；8- warming plates；9- copper coins；10- mica sheets；11- regenerative apparatuses.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1：
A kind of performance test methods of phase transition heat accumulation unit, regenerative apparatus 11 is entered using phase transition heat accumulation unit Performance Test System
Row performance test.
As shown in figure 5, the Performance Test System of phase transition heat accumulation unit 11 includes being surrounded by multiple warming plates 8 forming one
The casing of rectangular inner cavity and PID temperature control systems, the temp measuring system being separately mounted on casing, the PID temperature control systems include
By the heating plate 1 of signal wire connection, A.C. contactor 2, temperature control instrument 3, temperature-sensing probe 4, the temperature control outside casing
Instrument 3 connects the heating plate 1 being arranged on the vertical wall in inner chamber one by A.C. contactor 2, for monitoring the temperature of heating plate 1
Temperature-sensing probe 4 output end access temperature control instrument 3, the input of the temp measuring system is fixed on warming plate 8 and for surveying
Try cabinets cavity temperature, the temp measuring system include be sequentially connected thermocouple 5, data collecting system 6, computer 7 and
The digital camera being connected with data collecting system 6；A side contacts of the heating plate 1 as unique thermal source and regenerative apparatus 11,
Remaining wall of regenerative apparatus 11 in addition to the wall for setting thermal source is adiabatic test surfaces.
As shown in figure 1, the performance test methods of the phase transition heat accumulation unit 11, refer in the environment of temperature relative constancy
Operated, phase-change material is first encapsulated into regenerative apparatus 11, then thermal source and thermal insulation are installed, then carry out single point temperature change respectively
Change test, boundary distribution tests.
It is described phase-change material is encapsulated into regenerative apparatus 11 to specifically refer to first heat solid phase material and melt it for liquid phase,
Then liquid phase material is layered by injection regenerative apparatus 11 using needle tubing, each injecting height is 6-8mm and waits last layer liquid phase material
After material solidification completely, then carry out next layer of injection.
It is described phase-change material is encapsulated into regenerative apparatus 11 during, last time inject liquid phase material after its top away from
There is 2-5mm from the top of regenerative apparatus 11.
The installation thermal source and it is adiabatic, in particular to：Treat that the solid phase material of regenerative apparatus 11 is sufficiently cooled to design temperature
Afterwards stand a period of time, first heating plate 1 is tightly bonded with a vertically arranged side wall of regenerative apparatus 11, then be incubated
Layer covering needs adiabatic test surfaces.In installation thermal source and adiabatic heating plate 1, exchange in should also detecting PID temperature control systems afterwards
Whether the circuit between contactor 2, temperature control instrument 3, temperature-sensing probe 4 connects well.
The single point temperature change test, boundary distribution tests, specifically include following steps：
Step A1：The test point being distributed in matrix form is correspondingly arranged on each test surfaces respectively, each test point is corresponding to be installed
One thermocouple 5；
Step A2：Each thermocouple 5 is respectively connected to data collecting system 6, and checks that data collecting system 6 is with computer 7
No connection is good；
Step A3：After ready, heat source temperature is adjusted to setting value, heat-accumulating process by PID temperature control systems and thus started,
The temperature of starting stage endogenous pyrogen is rapidly increased to setting value, then keeps constant；During this, thermocouple 5 is set with interval 1min
Determine the temperature information of the corresponding test point of frequency interval collection.
In step A3, it is also necessary to remove one piece of warming plate 8 by the setting moment, phase transition heat accumulation unit is recorded with digital camera
Solid-liquid phase interface location in 11, the warming plate 8 is recovered to covering position immediately after taking pictures.
Phase-transition heat-storage process needs the indoor progress in temperature relative constancy.Meanwhile fusing point is used in the present embodiment as 27-
The RT28HC of 29 DEG C of German RUBITTHERM companies production is experiment phase-change material.Before on-test, first by solid phase material
Liquid phase is heated to, then starts to fill into regenerative apparatus 11, treats that liquid phase material is solidified as solid phase and cooled down in regenerative apparatus 11
To setting value, thus heat-accumulating process starts.The temperature of starting stage endogenous pyrogen is rapidly increased to setting value, then keeps constant.
When carrying out performance test to regenerative apparatus 11 using performance test apparatus in the present embodiment, by PID temperature control system controls
Source temperature regulation is heated, while each number of test points evidence during experiment is acquired using temp measuring system, stored, so as to make
Supported for the data that the later stage is researched and analysed.Further, its warming plate 8 of the casing is detachable.Therefore, during experiment,
The warming plate 8 of a certain side wall can be removed at the setting moment, with solid-liquid phase interface location in digital camera tape deck.Shoot
Warming plate 8 is covered into go back to original place after.
Temperature control instrument 3 and A.C. contactor 2 are arranged on an adiabatic control box on the outside of casing in the PID temperature control systems
In, or the installation by adhering of A.C. contactor 2, in the housing of temperature control instrument 3, the output end of A.C. contactor 2 passes through electrical signal line
Connection heating plate 1 is to control heating plate 1 to start or stop heating work, while the output end of temperature control instrument 3 and temperature-sensing probe 4 connects
Connect, the operating temperature of heating plate 1 is obtained in real time, so as to form the closed-loop control of heat source temperature.In the present embodiment, by can be with people
The temperature control instrument 3 of work arrange parameter shows the temperature value at 1 corresponding thermal source of heating plate, so as to the surface of PID adjustment controls heating plate 1
Temperature.
The temperature control instrument 3 is commercially available intelligent temperature controller, and PID regulations can be achieved, and sample frequency is 2 times/second, electricity
Source 220VAC/50-60Hz.The heating plate 1 is the heating plate 1 that commercially available power is 50-200W.The A.C. contactor 2 is
Commercially available prod, contactor coil operating voltage U are exchange 36V, 110V, 127V, 220V, 380V；Pick-up voltage 85%-110%U；
Release voltage 20%-75%U.- 50 DEG C of detection range ~ 250 DEG C of the temperature-sensing probe 4, maximum current 2mA.
The thermocouple 5 is the T-shaped thermocouple of copper constantan, and the data acquisition unit is at least one MOBREY 35951C
IMP data acquisition boards.Heating plate 1, A.C. contactor 2, temperature control instrument 3, temperature-sensing probe 4 are city in the PID temperature control systems
Product is sold, is attached, installed according to present disclosure.The temperature data that the thermocouple 5 gathers is adopted by data
Collection plate is sent to computer record and can real-time display.
Embodiment 2：
In the present embodiment, by taking rectangular cavity regenerative apparatus 11 as an example.The inner chamber of the performance test apparatus is just with treating performance test
Rectangular cavity regenerative apparatus 11 outline it is suitable.
As shown in figure 5, the left side wall of rectangular cavity regenerative apparatus 11 and casing sets heating plate 1 to be used as unique thermal source.Now
Heating plate 1 is rectangular slab and overlapped just with casing left side wall.
As shown in Figure 2 and Figure 3, using the width of rectangular cavity regenerative apparatus 11 as X-axis, with rectangular cavity regenerative apparatus 11
Short transverse is Y-axis, the length direction of rectangular cavity regenerative apparatus 11 is Z axis.Origin represents the distributing position of thermocouple 5 in figure, i.e.,
Temperature measuring point.
The other parts of the present embodiment are same as Example 1, therefore repeat no more.
Embodiment 3：
A kind of performance test methods of phase transition heat accumulation unit, regenerative apparatus 11 is placed in inner chamber, including surrounds shape by multiple warming plates 8
Casing and the PID temperature control systems, the temp measuring system that are separately mounted on casing into rectangular inner cavity, the PID temperature controls system
System is included by the heating plate 1 of signal wire connection, A.C. contactor 2, temperature control instrument 3, temperature-sensing probe 4, outside casing
Temperature control instrument 3 connected by A.C. contactor 2 and be arranged on heating plate 1 on the vertical wall in inner chamber one, for monitoring heating
The temperature-sensing probe 4 of the temperature of plate 1 output end access temperature control instrument 3, the input of the temp measuring system be fixed on warming plate 8 and
For testing the temperature of cabinets cavity, the temp measuring system includes thermocouple 5, data collecting system 6, the computer being sequentially connected
7, the enclosed inside phase-change material of regenerative apparatus 11, the heating plate 1 is as unique thermal source and a side joint of regenerative apparatus 11
Touch, remaining wall of regenerative apparatus 11 in addition to the wall for setting thermal source is adiabatic.
In the present embodiment, by taking wedge shape section regenerative apparatus 11 as an example.
As shown in figure 5, the left side wall of wedge shape section regenerative apparatus 11 is a side wall being vertically arranged, and the left side wall of casing
Heating plate 1 is set to be used as unique thermal source.Now heating plate 1 is rectangular slab and overlapped just with casing left side wall.
As shown in figure 4, using the width of wedge shape section regenerative apparatus 11 as X-axis, with wedge shape section regenerative apparatus 11
Short transverse is Y-axis, the length direction of wedge shape section regenerative apparatus 11 is Z axis.Origin represents the distributing position of thermocouple 5 in figure,
That is temperature measuring point.
The other parts of the present embodiment are same as Example 1, therefore repeat no more.
Embodiment 4：
The present embodiment is on the basis of embodiment any one of 1-3, further optimization, in order to ensure the uniform of heat source surface temperature
Property, the copper coin 10 set up between heating plate 1 and regenerative apparatus 11 while be bonded with heating plate 1, regenerative apparatus 11.After tested,
Under identical conditions, the temperature difference is only 0.5 DEG C in the effective coverage range of heating plate 1.
The other parts of the present embodiment are identical with any one of embodiment 1-3, therefore repeat no more.
Embodiment 5：
The present embodiment is on the basis of embodiment any one of 1-4, and further optimization, the heating plate 1 is close to the back side of warming plate 8
Mica sheet 10 is installed.The heating plate 1, copper coin 9, the length and width dimensions of mica sheet 10 are consistent, and it sets more than regenerative apparatus 11
Put the length and width dimensions of the wall of thermal source.Above-mentioned setting, this thermal source of heating plate 1 can be reduced to the radiation loss on the outside of this.
The other parts of the present embodiment are identical with any one of embodiment 1-4, therefore repeat no more.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
Any simply modification, the equivalent variations made according to the technical spirit of the present invention to above example, each fall within the protection of the present invention
Within the scope of.
Claims (7)
1. a kind of performance test methods of phase transition heat accumulation unit, are entered using phase transition heat accumulation unit Performance Test System to regenerative apparatus
Row performance test, it is characterised in that：
The phase transition heat accumulation unit Performance Test System is included by multiple warming plates（8）Surround the casing to form a rectangular inner cavity
And PID temperature control systems, temp measuring system on casing are separately mounted to, the PID temperature control systems include connecting by signal wire
Heating plate（1）, A.C. contactor（2）, temperature control instrument（3）, temperature-sensing probe（4）, the temperature control instrument outside casing（3）
Pass through A.C. contactor（2）Connection is arranged on the heating plate on the vertical wall in inner chamber one（1）, for monitoring heating plate（1）Temperature
The temperature-sensing probe of degree（4）Output end access temperature control instrument（3）, the input of the temp measuring system is fixed on warming plate（8）On
And for testing the temperature of cabinets cavity, the temp measuring system includes the thermocouple being sequentially connected（5）, data collecting system（6）、
Computer（7）And and data collecting system（6）The digital camera of connection；The heating plate（1）As unique thermal source and accumulation of heat
Device（11）A side contacts, regenerative apparatus（11）Remaining wall in addition to the wall for setting thermal source is adiabatic test
Face；
The performance test methods of the phase transition heat accumulation unit, refer to be operated in the environment of temperature relative constancy, first by phase
Become material package and enter regenerative apparatus（11）, then thermal source and thermal insulation are installed, then carry out single point temperature change test, boundary respectively
Distribution tests.
A kind of 2. performance test methods of phase transition heat accumulation unit according to claim 1, it is characterised in that：It is described by phase transformation
Material package enters regenerative apparatus（11）Specifically refer to first heat solid phase material and melt it as liquid phase, then using needle tubing by liquid
Phase material layering injection regenerative apparatus（11）, after each injecting height is 6-8mm and waits the solidification completely of last layer liquid phase material, then
Carry out next layer of injection.
A kind of 3. performance test methods of phase transition heat accumulation unit according to claim 2, it is characterised in that：It is described by phase transformation
Material package enters regenerative apparatus（11）During, last time injects its distance from top regenerative apparatus after liquid phase material（11）'s
2-5mm is arranged at top.
A kind of 4. performance test methods of phase transition heat accumulation unit according to claim 1, it is characterised in that：The installation heat
Source and it is adiabatic, in particular to：Treat regenerative apparatus（11）Solid phase material be sufficiently cooled to stand a period of time after design temperature, first
By heating plate（1）With regenerative apparatus（11）A vertically arranged side wall be tightly bonded, then use heat-insulation layer（8）Covering needs
Adiabatic test surfaces.
A kind of 5. performance test methods of phase transition heat accumulation unit according to claim 4, it is characterised in that：In installation thermal source
And it should also detect heating plate in PID temperature control systems after thermal insulation（1）, A.C. contactor（2）, temperature control instrument（3）, temperature-sensing probe
（4）Whether circuit each other connects well.
A kind of 6. performance test methods of phase transition heat accumulation unit according to claim any one of 1-5, it is characterised in that：Institute
Single point temperature change test, boundary distribution tests are stated, specifically include following steps：
Step A1：The test point being distributed in matrix form is correspondingly arranged on each test surfaces respectively, each test point is corresponding to be installed
One thermocouple（5）；
Step A2：By each thermocouple（5）It is respectively connected to data collecting system（6）, and check data collecting system（6）With calculating
Machine（7）Whether connect good；
Step A3：After ready, heat source temperature is adjusted to setting value, heat-accumulating process by PID temperature control systems and thus started,
The temperature of starting stage endogenous pyrogen is rapidly increased to setting value, then keeps constant；During this, thermocouple（5）With setpoint frequency
The temperature information of the corresponding test point of interval collection, while also need to remove one piece of warming plate by the setting moment, remembered with digital camera
The solid-liquid phase interface location in phase transition heat accumulation unit is recorded, immediately recovers the warming plate to covering position after taking pictures.
A kind of 7. performance test methods of phase transition heat accumulation unit according to claim 6, it is characterised in that：The step A3
Middle setpoint frequency refers to that the sampling period is 1min.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982577A (en) * | 2018-06-25 | 2018-12-11 | 浙江大学 | Composite phase-change material fusing/process of setting phase boundary gauge and method based on thermochromic liquid crystal |
| CN110006281A (en) * | 2019-04-18 | 2019-07-12 | 河海大学 | A kind of phase transition heat accumulation unit improving phase-change material heat storage efficiency |
| CN110737119A (en) * | 2019-09-17 | 2020-01-31 | 浙江大学 | two-dimensional phase interface digital processing display method based on thermochromatic liquid crystal |
| CN114235894A (en) * | 2022-02-23 | 2022-03-25 | 全球能源互联网研究院有限公司 | Epoxy resin performance testing method for packaging high-frequency transformer |
| CN114544702A (en) * | 2022-04-27 | 2022-05-27 | 江苏宇晗数据科技有限公司 | Online monitoring equipment for heat storage capacity of soil layer of tunnel wall |
| CN114965547A (en) * | 2022-05-25 | 2022-08-30 | 天津大学 | Experimental device capable of measuring phase change interface and volume change rate of phase change material |
| CN114965548A (en) * | 2022-05-25 | 2022-08-30 | 天津大学 | Experimental device capable of simultaneously measuring phase change interface and temperature distribution of phase change material |
| CN115078443A (en) * | 2022-07-27 | 2022-09-20 | 国网智能电网研究院有限公司 | Phase change performance testing device, system and method for phase change energy storage material |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982577A (en) * | 2018-06-25 | 2018-12-11 | 浙江大学 | Composite phase-change material fusing/process of setting phase boundary gauge and method based on thermochromic liquid crystal |
| CN108982577B (en) * | 2018-06-25 | 2020-06-16 | 浙江大学 | Phase interface measuring device and method for melting/solidifying process of composite phase change material based on thermochromatic liquid crystal |
| CN110006281A (en) * | 2019-04-18 | 2019-07-12 | 河海大学 | A kind of phase transition heat accumulation unit improving phase-change material heat storage efficiency |
| CN110737119A (en) * | 2019-09-17 | 2020-01-31 | 浙江大学 | two-dimensional phase interface digital processing display method based on thermochromatic liquid crystal |
| CN110737119B (en) * | 2019-09-17 | 2020-09-11 | 浙江大学 | Two-dimensional phase interface digital processing display method based on thermochromatic liquid crystal |
| CN114235894A (en) * | 2022-02-23 | 2022-03-25 | 全球能源互联网研究院有限公司 | Epoxy resin performance testing method for packaging high-frequency transformer |
| CN114235894B (en) * | 2022-02-23 | 2022-04-29 | 全球能源互联网研究院有限公司 | Epoxy resin performance testing method for packaging high-frequency transformer |
| CN114544702A (en) * | 2022-04-27 | 2022-05-27 | 江苏宇晗数据科技有限公司 | Online monitoring equipment for heat storage capacity of soil layer of tunnel wall |
| CN114544702B (en) * | 2022-04-27 | 2022-12-20 | 江苏宇晗数据科技有限公司 | Online monitoring equipment for heat storage capacity of soil layer of tunnel wall |
| CN114965547A (en) * | 2022-05-25 | 2022-08-30 | 天津大学 | Experimental device capable of measuring phase change interface and volume change rate of phase change material |
| CN114965548A (en) * | 2022-05-25 | 2022-08-30 | 天津大学 | Experimental device capable of simultaneously measuring phase change interface and temperature distribution of phase change material |
| CN115078443A (en) * | 2022-07-27 | 2022-09-20 | 国网智能电网研究院有限公司 | Phase change performance testing device, system and method for phase change energy storage material |
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Application publication date: 20180406 |