CN204422455U - For the experimental provision of nano-fluid directional solidification - Google Patents
For the experimental provision of nano-fluid directional solidification Download PDFInfo
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- CN204422455U CN204422455U CN201420852555.4U CN201420852555U CN204422455U CN 204422455 U CN204422455 U CN 204422455U CN 201420852555 U CN201420852555 U CN 201420852555U CN 204422455 U CN204422455 U CN 204422455U
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Abstract
The utility model discloses a kind of experimental provision for nano-fluid directional solidification, comprise constant temperature stay-warm case, constant temperature stay-warm case inside is provided with cold bench from top to bottom successively, upper cool-guiding body, lower cool-guiding body and lower cold bench, upper cool-guiding body is fixedly installed in cold bench bottom, lower cool-guiding body is fixedly installed in lower cold bench top, the gap of placing nano-fluid sample to be measured is there is between upper cool-guiding body and lower cool-guiding body, upper cold bench top is provided with cooling piece, constant temperature stay-warm case top offers air inlet, air inlet is provided with fan, constant temperature stay-warm case bottom offers air outlet, the temperature sensor measuring constant temperature insulation case temperature is also installed in constant temperature stay-warm case, constant temperature stay-warm case front end offers the window of taking and putting measured nano-fluid sample.The utility model solves device for directionally solidifying cannot solidifying low-temperature phase-change material, for the process of setting research of nano-fluid provides method.
Description
Technical field
The utility model relates to a kind of experimental provision, is specially a kind of experimental provision for nano-fluid directional solidification.
Background technology
Along with the develop rapidly of China's economy and modernization construction, city size constantly expands, power structure Rapid Variable Design, the regionality of electricity needs, seasonality, the period and sudden electric load that causes and peak-valley difference increase gradually, and imbalance between power supply and demand becomes increasingly conspicuous.Ice-reserving is one of effective ways solving user side electricity needs and electric power supply contradiction.It is little that traditional ice-reserving is faced with the ice capacity of heat transmission, and ice-reserving process thermal resistance is large, the technical bottleneck that energy storage efficiency is low.
Nowadays, water-based nano-fluid has the coefficient of heat conductivity higher than water because of it, less degree of supercooling, be expected to become excellent cool storage medium, but nano-fluid is used as energy storage material must stand circulating-heating and cooling, namely through repeated multiple times solidify with dissolving circulation process after, the hot physical performance of nano suspending liquid keeps stable, can not degradation failure.At present, the stability study of nano-fluid in solid-liquid phase-change process not yet launches, and being uniformly distributed after nano-fluid solidification and crystallization completes is also fresh concerned.Therefore be necessary the control setting about studying the growth of nano-fluid solidification and crystallization, make nano particle in solid phase nano suspending liquid, keep dispersion, thus extend its serviceable life.Therefore need to further investigate the process of setting of nano-fluid.Adopt directional solidification technique can to study the process mechanism that nano-fluid solidifies.Thermograde has very important impact to the dispersion stabilization after nano-fluid solidifies.
Utility model content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of experimental provision for nano-fluid directional solidification, and its structure is simple, easy to operate, good refrigeration effect, accuracy of temperature control is high, can provide efficient experimental data fast for the research of nano-fluid directional solidification.
The utility model solves the technical scheme that its technical matters adopts: for the experimental provision of nano-fluid directional solidification, comprise constant temperature stay-warm case, described constant temperature stay-warm case inside is provided with cold bench from top to bottom successively, upper cool-guiding body, lower cool-guiding body and lower cold bench, described upper cool-guiding body is fixedly installed in described upper cold bench bottom, described lower cool-guiding body is fixedly installed in described lower cold bench top, the gap of placing nano-fluid sample to be measured is there is between described upper cool-guiding body and described lower cool-guiding body, described upper cold bench top is provided with cooling piece, described constant temperature stay-warm case top offers air inlet, described air inlet goes out to be provided with fan, described constant temperature stay-warm case bottom offers air outlet, the Cryogenic air that the described cooling piece being arranged on upper cold bench top produces is blown in constant temperature stay-warm case by described air inlet, discharging from described air outlet again after heat exchange in cover, the temperature sensor measuring described constant temperature insulation case temperature is also installed in described constant temperature stay-warm case, measuring tempeature result by feeding back to temperature control system or the experimenter of cover body, to carry out monitor and forecast to the temperature in cover body at any time, described constant temperature stay-warm case front end also offers the window of taking and putting measured nano-fluid sample.
Described constant temperature stay-warm case inside is also provided with vertically disposed rail, described upper cold bench and described lower cold bench are slidably mounted on described rail by connection sliding block, by the change sliding up and down the spacing that can realize upper and lower cold bench of upper cold bench and lower cold bench, meet the nano-fluid sample to be measured of differing heights size.
Described constant temperature stay-warm case is provided with water-cooled entrance and water-cooled outlet, described upper cold bench and described lower cold bench offer tank, described water-cooled entrance and water-cooled export the tank by upper cold bench and described lower cold bench described in pipeline communication, described water-cooled entrance and water-cooled export external water cooling unit, make the tank of described upper cold bench and described lower cold bench form Water-cooling circulating.Upper and lower cold bench adopts water-cooling, and the heat that cold bench is produced in process of refrigerastion distributes in time, ensures the precision that cold bench works long hours and stablizes, playing a protective role to cold bench; Described upper cold bench and described lower cold bench are also provided with temperature alarm, can remind when fault or cold bench temperature anomaly and report to the police.
Described air inlet is provided with fan.
It is assembled that described constant temperature stay-warm case adopts 10mm to be incubated acrylic board.
Described cooling piece adopts Level One semiconductor cooling piece, and its refrigeration minimum temperature can reach-20 DEG C, and temperature control precision can reach 0.1 DEG C, can realize the directional solidification under different thermogrades.
Described upper cool-guiding body and described lower cool-guiding body adopt aluminum cool-guiding body, and it can strengthen conduction cooling effect, reduce the temperature fluctuation in constant temperature stay-warm case simultaneously, improve the labyrinth of constant temperature cover interior temperature distribution, make constant temperature cover internal temperature homogeneous constant.
Described temperature sensor is installed on described constant temperature stay-warm case inner hub location, and described temperature sensor is copper-constantan thermocouple.
The utility model also provides a kind of method studying nano-fluid directional solidification, and the method is that the experimental provision for nano-fluid directional solidification provided based on the utility model content carries out testing realization, and concrete operation step is:
Step one: described constant temperature stay-warm case is started, the temperature of described cooling piece sets higher than or equals the liquidus temperature of nano-fluid to be measured, (thermograde can as research variable herein to get fixed temperature gradient, identical with thermograde in step 4, concrete numerical value can be chosen by research needs), open the switch of described fan, by described temperature sensor access testing tool, wait for that the temperature in described constant temperature stay-warm case is reduced to setting value and remains stable.
Step 2: described upper cold bench and described lower cold bench are started the phase transition temperature that described lower cold bench design temperature is nano-fluid to be measured, described upper cold bench design temperature is the temperature value in described constant temperature stay-warm case, start water cooling unit, carrying out cooling to upper and lower cold bench makes its Wen Ding (maintenance temperature) work, by sensor measurement cool-guiding body surface temperature, wait for that the temperature of upper and lower cold bench and cool-guiding body reaches preset value and remains constant; Wherein, described upper cold bench and described lower cold bench adopt semiconductor refrigerating, and coordinate PID temperature control technology, can realize the accurate control to temperature, control accuracy reaches 0.1 DEG C.Described sensor has two, lays respectively at the inside of described upper cold bench and described lower cold bench, is the ultramagnifier of whole PID control system.Described sensor is temperature sensor.
Step 3: nano-fluid sample to be measured is placed on described lower cool-guiding body by described window, mobile described upper cold bench and described lower cold bench after fixing, make the upper end of nano-fluid sample to be measured and described upper cool-guiding body close contact, lock the position of described upper cold bench and described lower cold bench, wait for that the temperature of nano-fluid sample to be measured reaches the temperature in described constant temperature stay-warm case and stablizes.
Step 4: choose said temperature gradient, described lower cold bench temperature is set as the liquidus temperature being equal to or less than nano-fluid to be measured, treat that described lower cold bench temperature is reduced to preset value, namely nano-fluid sample starts to carry out directional solidification from the bottom to top, records described preset value temperature and nano-fluid sample orientation is solidified; Record data are described upper cold bench and described lower cold bench temperature and constant temperature cover environment temperature, for studying the impact of different temperatures gradient on nano-fluid process of setting stability, and can be stability indicating by scanning electron microscope.
Step 5: repeatedly successively above-mentioned steps one to step 4 is repeated to same nano-fluid sample, and records related data, the dispersion stabilization after the stability of the process mechanism that analysis nano-fluid solidifies, the hot physical performance of nano suspending liquid and nano-fluid solidify.Different temperatures gradient need be chosen, for studying the impact of different temperatures gradient, can be stability indicating by scanning electron microscope.
The beneficial effects of the utility model are: the experimental provision for nano-fluid directional solidification that the utility model provides solves the problem that existing device for directionally solidifying cannot solidify low-temperature phase-change material, achieve the directional solidification of nano-fluid under low-temperature gradient; This apparatus structure is simple, easy to operate, good refrigeration effect, and accuracy of temperature control is high, and thermograde is adjustable, can be used for research different temperatures gradient to the impact of nano-fluid process of setting.The utility model additionally provides a kind of method studying nano-fluid directional solidification, the method is that the experimental provision for nano-fluid directional solidification provided based on the utility model realizes, and the method is that the process of setting of nano-fluid and stability study thereof provide strong data.
Accompanying drawing explanation
Fig. 1 is the plane cutting structural representation of a kind of experimental provision for nano-fluid directional solidification of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of experimental provision for nano-fluid directional solidification of the utility model is further described.
A kind of experimental provision for nano-fluid directional solidification, as shown in Figure 1, comprise constant temperature stay-warm case 1, constant temperature stay-warm case 1 inside is provided with cold bench 2 from top to bottom successively, upper cool-guiding body 3, lower cool-guiding body 4 and lower cold bench 5, upper cool-guiding body 3 fixedly mounts (welding) in upper cold bench 2 bottom, lower cool-guiding body 4 fixedly mounts (welding) in lower cold bench 5 top, the gap of placing nano-fluid sample 9 to be measured is there is between described upper cool-guiding body 3 and lower cool-guiding body 4, described upper cold bench 2 top is provided with cooling piece 21, constant temperature stay-warm case 1 top offers air inlet 11, air inlet 11 place is provided with fan 12, constant temperature stay-warm case 1 bottom offers air outlet 13, the Cryogenic air that the cooling piece 21 being arranged on upper cold bench 2 top produces is blown in constant temperature stay-warm case 1 by air inlet 12, discharging from air outlet 13 again after heat exchange in cover, the temperature sensor 6 measuring temperature in constant temperature stay-warm case 1 is also installed in constant temperature stay-warm case 1, measuring tempeature result by feeding back to temperature control system or the experimenter of cover body, to carry out monitor and forecast to the temperature in cover body at any time, constant temperature stay-warm case 1 front end also offers the window 14 of taking and putting measured nano-fluid sample 9, and power control line one end of constant temperature stay-warm case 1 is connected to the automatically controlled air plug on described constant temperature stay-warm case 1, another termination 220V power frequency supply.
Described constant temperature stay-warm case 1 inside is also provided with vertically disposed rail 15, and rail 15 is by fastened by screw between the top and bottom of constant temperature stay-warm case 1, and rail 15 being slidably fitted with four slide blocks, 7, four slide blocks 7 can be free to slide along rail 15.
Upper cold bench 2 is fixedly connected with upper and lower two groups of slide blocks 7 with lower cold bench 5 respectively by screw, thus be slidably mounted on rail 15, slide up and down the change that can realize gap between upper and lower cold bench by upper cold bench 2 and lower cold bench 5, meet the nano-fluid sample to be measured of differing heights size.
Described constant temperature stay-warm case 1 is provided with water-cooled entrance 16 and water-cooled outlet 17, water-cooled entrance 16 and water-cooled outlet 17 are screwed on constant temperature stay-warm case 1, upper cold bench 2 and lower cold bench 5 offer tank, water-cooled entrance 16 and water-cooled outlet 17 are communicated with the tank of cold bench 2 and lower cold bench 5 by pipeline 10, water-cooled entrance 16 and water-cooled export 17 external water cooling units 8, make the tank of cold bench 2 and lower cold bench 5 form Water-cooling circulating.Upper and lower cold bench adopts water-cooling, and the heat that cold bench is produced in process of refrigerastion distributes in time, ensures the precision that cold bench works long hours and stablizes, playing a protective role to cold bench; Upper cold bench 2 and lower cold bench 5 are also provided with temperature alarm, can remind when fault or cold bench temperature anomaly and report to the police.
It is assembled that described constant temperature stay-warm case 1 adopts 10mm to be incubated acrylic board.
Described cooling piece 21 adopts Level One semiconductor cooling piece, and its refrigeration minimum temperature can reach-20 DEG C, and temperature control precision can reach 0.1 DEG C, can realize the directional solidification under different thermogrades.
Described upper cool-guiding body 3 and lower cool-guiding body 4 adopt aluminum cool-guiding body, and it can strengthen conduction cooling effect, reduce the temperature fluctuation in constant temperature stay-warm case 1 simultaneously, improve the labyrinth of constant temperature cover interior temperature distribution, make constant temperature cover internal temperature homogeneous constant.
Temperature sensor 6 is installed on constant temperature stay-warm case 1 inner hub location, and temperature sensor is copper-constantan thermocouple.
The utility model also provides a kind of experimental technique for nano-fluid directional solidification, the experimental provision for nano-fluid directional solidification utilizing the utility model content to provide carry out test realize, the concrete operation step comprised is:
Step one: described constant temperature stay-warm case 1 is started (switching on power and switch board), the temperature of cooling piece 21 sets higher than or equals the liquidus temperature of nano-fluid to be measured, get fixed temperature gradient, open the switch of described fan 12, described temperature sensor 6 is accessed testing tool, waits for that the temperature in described constant temperature stay-warm case 1 is reduced to setting value and remains stable.Described thermograde can as research variable, and identical with thermograde in step 4, concrete numerical value can need to choose by research material.
Step 2: described upper cold bench 2 and described lower cold bench 5 are started, described lower cold bench 5 design temperature is the phase transition temperature of nano-fluid 1 to be measured, described upper cold bench 2 design temperature is the temperature value in described constant temperature stay-warm case 1, start water cooling unit, carrying out cooling to upper and lower cold bench makes its Wen Ding (maintenance temperature) work, by the surface temperature of cool-guiding body on sensor measurement 3 and lower cool-guiding body 4, wait for that the temperature of upper and lower cold bench and cool-guiding body reaches preset value and remains constant.
Step 3: nano-fluid sample 9 to be measured is placed on described lower cool-guiding body by window 14, mobile described upper cold bench and described lower cold bench after fixing, make the upper end of nano-fluid sample to be measured and described upper cool-guiding body close contact, lock the position of described upper cold bench and described lower cold bench, wait for that the temperature of nano-fluid sample 9 to be measured reaches the temperature in described constant temperature stay-warm case 1 and stablizes.
Step 4: choose said temperature gradient, described lower cold bench 5 temperature is set as the liquidus temperature lower than nano-fluid to be measured, treat that described lower cold bench 5 temperature is reduced to preset value, namely nano-fluid sample 9 starts to carry out directional solidification from the bottom to top, records described preset value temperature and nano-fluid sample orientation is solidified
Step 5: repeatedly successively above-mentioned steps one to step 4 is repeated to same nano-fluid sample, and records related data, the dispersion stabilization after the stability of the process mechanism that analysis nano-fluid solidifies, the hot physical performance of nano suspending liquid and nano-fluid solidify.Different temperatures gradient need be chosen, for studying the impact of different temperatures gradient, can be stability indicating by scanning electron microscope.
As described above, be only the preferred embodiment that this is novel, when can not limit the scope of this novel enforcement with this, the simple equivalence change namely generally done according to this novel claim and novel description with modify, all still belong in scope that this new patent contains.
Claims (9)
1. for the experimental provision of nano-fluid directional solidification, comprise constant temperature stay-warm case, it is characterized in that, described constant temperature stay-warm case inside is provided with cold bench from top to bottom successively, upper cool-guiding body, lower cool-guiding body and lower cold bench, described upper cool-guiding body is fixedly installed in described upper cold bench bottom, described lower cool-guiding body is fixedly installed in described lower cold bench top, the gap of placing nano-fluid sample to be measured is there is between described upper cool-guiding body and described lower cool-guiding body, described upper cold bench top is provided with cooling piece, described constant temperature stay-warm case top offers air inlet, described constant temperature stay-warm case bottom offers air outlet, the temperature sensor measuring described constant temperature insulation case temperature is also installed in described constant temperature stay-warm case, described constant temperature stay-warm case front end offers the window of taking and putting measured nano-fluid sample.
2. the experimental provision for nano-fluid directional solidification according to claim 1, it is characterized in that, described constant temperature stay-warm case inside is also provided with vertically disposed rail, described upper cold bench and described lower cold bench are slidably mounted on described rail by connection sliding block, by the change sliding up and down the spacing that can realize upper and lower cold bench of upper cold bench and lower cold bench.
3. the experimental provision for nano-fluid directional solidification according to claim 1, it is characterized in that, described constant temperature stay-warm case is provided with water-cooled entrance and water-cooled outlet, described upper cold bench and described lower cold bench offer tank, described water-cooled entrance and water-cooled export the tank by upper cold bench and described lower cold bench described in pipeline communication, described water-cooled entrance and water-cooled export external water cooling unit, make the tank of described upper cold bench and described lower cold bench form Water-cooling circulating.
4. the experimental provision for nano-fluid directional solidification according to claim 1 or 3, is characterized in that, described upper cold bench and described lower cold bench are also provided with temperature alarm.
5. the experimental provision for nano-fluid directional solidification according to claim 1, is characterized in that, described air inlet is provided with fan.
6. the experimental provision for nano-fluid directional solidification according to claim 1, is characterized in that, described constant temperature stay-warm case adopts insulation acrylic board assembled.
7. the experimental provision for nano-fluid directional solidification according to claim 1, is characterized in that, described cooling piece adopts Level One semiconductor cooling piece.
8. the experimental provision for nano-fluid directional solidification according to claim 1, is characterized in that, described upper cool-guiding body and described lower cool-guiding body adopt aluminum cool-guiding body.
9. the experimental provision for nano-fluid directional solidification according to claim 1, is characterized in that, described temperature sensor is installed on described constant temperature stay-warm case inner hub location.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420852555.4U CN204422455U (en) | 2014-12-26 | 2014-12-26 | For the experimental provision of nano-fluid directional solidification |
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| CN201420852555.4U CN204422455U (en) | 2014-12-26 | 2014-12-26 | For the experimental provision of nano-fluid directional solidification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569031B (en) * | 2014-12-26 | 2017-06-13 | 广东工业大学 | For the experimental provision and method of nano-fluid directional solidification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569031B (en) * | 2014-12-26 | 2017-06-13 | 广东工业大学 | For the experimental provision and method of nano-fluid directional solidification |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150624 Effective date of abandoning: 20170613 |