CN105352990A - Device and method for testing volume deformation of organic phase-change heat storage material - Google Patents
Device and method for testing volume deformation of organic phase-change heat storage material Download PDFInfo
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- CN105352990A CN105352990A CN201510990066.4A CN201510990066A CN105352990A CN 105352990 A CN105352990 A CN 105352990A CN 201510990066 A CN201510990066 A CN 201510990066A CN 105352990 A CN105352990 A CN 105352990A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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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
- G01N25/16—Investigating or analyzing materials by the use of thermal means by investigating thermal coefficient of expansion
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Abstract
The invention relates to a device and a method for testing volume deformation of an organic phase-change heat storage material and aims to solve problems of low testing precision and poor repeatability of existing devices and methods. The device comprises a communicating container, a water bath heating device, a fixing support and a laser displacement sensor. The method comprises steps as follows: I, weighing is performed; II, water is injected; III, the whole communicating container is placed in the water bath heating device, the initial temperature T1 of a liquid in the communicating container is recorded by the laser displacement sensor, the laser displacement sensor is fixed right above a thin tube of the communicating container through the fixing support, and the initial distance L1 of a plastic sheet is recorded by the laser displacement sensor; IV, the temperature T2 of the liquid in the communicating container is recorded by a temperature sensor, and the distance L2 of the plastic sheet is tested by the laser displacement sensor; V, the volume change rate of the organic phase-change heat storage material is calculated. The device and the method are applied to the field of organic phase-change heat storage materials.
Description
Technical field
The present invention relates to proving installation and the method for Organic phase change thermal storage material cubic deformation.
Background technology
Along with the fast development of social economy and modern science and technology, building energy conservation and buildings comfortable for living improve and receive increasing concern, have therefore promoted technical development and the application of phase-change heat-storage material.So-called phase-change heat-storage material, just refers to that material can change state with the temperature variation of surrounding environment, and can automatic absorption heat maybe will store in very narrow temperature fluctuation range thermal release, thus the temperature controlling surrounding environment is relatively stable.In all kinds of phase-change heat-storage material, organic phase-change heat-storage material have water insoluble, latent heat of phase change value is high, chemical stability good, Heat stability is good, nontoxic, low corrosion, the advantage such as cheap and easy to get, at building field, there is application prospect widely.
Organic phase-change heat-storage material in actual applications, general directly mix with building materials or be prepared into encapsulate energy storage goods.In the process storing heat release, there is mushy stage and transform, often produce obviously cubic deformation in organic phase-change heat-storage material.When the volume change of organic phase-change heat-storage material is excessive, produce larger distortion and stress, destructible packaged article produces to be revealed, thus affects long-time stability and the permanance of phase-change heat-storage material goods and whole system.Therefore, the cubic deformation before and after phase transformation prepares organic phase-change heat-storage material packaged article and applies the parameter value that must measure.At present, proving installation all ununified both at home and abroad and method, different researcher all adopts simple and easy method for the cubic deformation of organic phase-change material, and measuring accuracy is low, poor repeatability.During the molten swollen volume change of many research in Meng fatty acid, taking the liquid fat acid of certain volume with graduated cylinder, after it solidifies, adopting drainage again to weigh the volume of solid fatty acids, finally by calculating volume change.The method directly cannot measure bulk, graininess or pulverous fatty acid, needs first melting fatty acid to become liquid.And if the amount of fatty acid very little, volume change is not obvious, then measuring accuracy is lower.The people such as Kong Qiaoling are by the volume change rule in the device research phase transition process of designed, designed and influence factor thereof.This device utilizes the volume change of water to weigh the volume change of phase-change material.But before experiment, need by phase-change material melting and solidification several times, discharge the air of the inside until when liquid level in graduated tube no longer changes, just can start experiment.The preliminary work of this measuring method is comparatively complicated, and poor repeatability.
Summary of the invention
The present invention will solve existing apparatus and method measuring accuracy is low, the problem of poor repeatability, and provides a kind of proving installation and method of Organic phase change thermal storage material cubic deformation.
A proving installation for Organic phase change thermal storage material cubic deformation, it comprises connection container, water bath heating device, fixed support and laser displacement sensor;
Described laser displacement inductor is fixed on support bracket fastened vertical-shaped bar, and described water bath heating device is arranged on support bracket fastened base plate, and described connection container is arranged on water bath heating device inside;
Wherein, described connection container comprises circular capillaries, bottom is communicated with tubule, circular extra heavy pipe, opening tubule, gland bonnet, temperature sensor, rubber plug, plastic sheet and gauze;
Described circular capillaries is communicated with tubule with circular extra heavy pipe by bottom and is interconnected; The top of described circular extra heavy pipe has two holes, and wherein, a hole adopts gland bonnet to seal, and another hole is communicated with opening tubule, and described opening tubule adopts rubber plug to seal;
Described organic phase-change heat-storage material is arranged in circular extra heavy pipe by gauze, and is fixed on the bottom of gland bonnet and can not floats in opening tubule; Described temperature sensor is fixed on record in circular extra heavy pipe and comprises the temperature variation of the overall liquid-phase system of organic phase-change heat-storage material;
In described circular capillaries, the water surface is provided with plastic sheet.
Principle of work: start water-bath thermal heating connection container, cause water expanded by heating and organic phase-change heat-storage material phase change expansion.Opening tubule is by rubber stopper seal, and volume can only produce at the circular capillaries place erect and expand.Utilize the temperature sensor be fixed in connection container, record comprises the temperature variation of the overall liquid-phase system of phase-change heat-storage material; The water surface in circular capillaries places plastic sheet, and laser displacement inductor is fixed on fixed support, can be conversed the cubic deformation of phase-change material generation by the height change of laser displacement sensor test plastic sheet before and after phase-change material undergoes phase transition.
Invention effect:
The object of this invention is to provide a kind of proving installation and method, accurately and easily can measure the volume change of bulk, graininess or pulverous organic phase-change heat-storage material.This proving installation and method undergo phase transition connection container one end that front and back cause water level height by measuring phase-change material changes, and in conjunction with the volume change of water during different temperatures, the volume change before and after the organic phase-change heat-storage material phase transformation determining certain mass or volume.The principle of work of this proving installation and method is simple, measuring accuracy is high, easy to operate.
Connection container is according to U-tube principle design, phase-change material is placed on the lower one end of connection container liquid level and closed port during test, according to the liquid level deformation test of the higher liquid level end of connection container split shed go out phase-change material undergo phase transition before and after the volume change value that causes.
Accompanying drawing explanation
Fig. 1 accompanying drawing illustrates connection container structural representation;
Fig. 2 accompanying drawing illustrates one-piece construction schematic diagram of the present invention.
Embodiment
Embodiment one: it of present embodiment comprises connection container 10, water bath heating device 11, fixed support 13 and laser displacement sensor 12;
Described laser displacement inductor 12 is fixed on fixed support 13, and it is inner that described connection container 10 is arranged on water bath heating device 11;
Wherein, described connection container 10 comprises the circular capillaries 1 of setting, horizontally disposed bottom is communicated with tubule 2, the circular extra heavy pipe 3 erect, opening tubule 4, gland bonnet 5, temperature sensor 6, rubber plug 7, plastic sheet 8 and gauze 9;
Described circular capillaries 1 is communicated with tubule 2 with circular extra heavy pipe 3 by bottom and is interconnected; The top of described circular extra heavy pipe 3 has two holes, and wherein, a hole adopts gland bonnet 5 to seal, and another hole is communicated with opening tubule 4, and described opening tubule 4 adopts rubber plug 7 to seal;
Described organic phase-change heat-storage material is arranged in circular extra heavy pipe 3 by gauze 9, and is fixed on the bottom of gland bonnet 5 and can not floats in opening tubule 4; Described temperature sensor 6 is fixed on record in circular extra heavy pipe 3 and comprises the temperature variation of the overall liquid-phase system of organic phase-change heat-storage material;
In described circular capillaries 1, the water surface is provided with plastic sheet 8.
Principle of work: start water-bath thermal 11 and heat connection container 10, cause water expanded by heating and organic phase-change heat-storage material phase change expansion.Opening tubule 4 is sealed by rubber plug 7, and volume can only produce at circular capillaries 1 place erect and expand.Utilize the temperature sensor 6 be fixed in connection container 10, record comprises the temperature variation of the overall liquid-phase system of phase-change heat-storage material; The water surface in circular capillaries 1 is placed plastic sheet 8, laser displacement inductor 12 is fixed on fixed support 13, tests by laser displacement sensor 12 cubic deformation that the height change of plastic sheet 8 before and after phase-change material undergoes phase transition can converse phase-change material generation.
Embodiment two: present embodiment and embodiment one unlike: described opening tubule 4 diameter is less than circular extra heavy pipe 3 diameter.
Other step and parameter identical with embodiment one.
Embodiment three: present embodiment and embodiment one or two unlike: the height of described opening tubule 4 is greater than the height 30 ~ 50mm of gland bonnet 5.
Other step and parameter identical with embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three unlike: the material of described connection container 10 is glass or engineering plastics.
Other step and parameter identical with one of embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four unlike: a kind of method of testing of Organic phase change thermal storage material cubic deformation, is characterized in that it realizes according to the following steps:
Step one: weighed by connection container 10, quality is M
1, and taking a certain amount of organic phase-change heat-storage material, quality is m;
Step 2: the water being injected 2/3 height by opening tubule 4 in the circular extra heavy pipe 3 in connection container 10, is wrapped the organic phase-change heat-storage material weighed up, put into the lower end being sealed lid 5 from opening tubule 4 with gauze 9;
Continue to be filled to opening tubule 4 mouth of pipe place to flush, with rubber plug 7 jam-pack, rocked up and down by connection container and leave standstill a period of time, after bubble is discharged completely, then the mouth of pipe being filled to open tube 4 flushes, with rubber plug 7 jam-pack;
Continue to be filled to its height higher than opening tubule 4 more than mouth of pipe 50mm in connection container 10 by circular capillaries 1, again plastic sheet 8 is put into gently on the water surface of circular capillaries 1, wipe connection container 10 excess surface moisture, weighed by connection container 10 now, quality is M
2;
Step 3: whole connection container 10 is put into water bath heating device 11, is recorded the initial temperature T of liquid in connection container 10 by laser displacement sensor 12
1, directly over the tubule 1 with fixed support 13 laser displacement sensor 12 being fixed to connection container 10, record the initial distance L of plastic sheet 8 with laser displacement inductor 11
1;
Step 4: start water-bath thermal 11, the temperature of water in connection container 10 is monitored by temperature sensor 6, the temperature of water need higher than the phase transition temperature of organic phase-change heat-storage material, after heating certain hour, after treating that the complete phase transformation of organic phase-change heat-storage material is stable, recorded the temperature T of liquid in connection container 10 by temperature sensor 6
2, and the distance L of plastic sheet 8 is tested with laser displacement inductor 12
2;
Step 5: calculate organic phase-change heat-storage material volume change
Height of water level difference (the L produced in circular capillaries 1
1-L
2) jointly caused by water expanded by heating and organic phase-change heat-storage material phase change expansion, therefore the water-head produced by phase-change heat-storage material phase change expansion equals 1 water-head produced and deducts the water-head that water expanded by heating produces at 1 place, therefore, the water-head Δ L=L produced by organic phase-change heat-storage material phase change expansion
1-L
2-L
water, L
waterthe height that water expanded by heating rises at circular capillaries 1 place,
α is the thermal expansivity of water, ρ
waterbe the density of water, D is the diameter being communicated with circular capillaries 1;
The density of known organic phase-change heat-storage material is ρ, can calculate organic phase-change heat-storage material volume change by following formula
By arranging, finally organic phase-change heat-storage material volume change can be calculated as follows:
Other step and parameter identical with one of embodiment one to four.
Claims (5)
1. a proving installation for Organic phase change thermal storage material cubic deformation, is characterized in that:
It comprises connection container (10), water bath heating device (11), fixed support (13) and laser displacement sensor (12);
Described laser displacement inductor (12) is fixed on the vertical-shaped bar of fixed support (13), described water bath heating device (11) is arranged on the base plate of fixed support (13), and it is inner that described connection container (10) is arranged on water bath heating device (11);
Wherein, described connection container (10) comprises circular capillaries (1), bottom is communicated with tubule (2), circular extra heavy pipe (3), opening tubule (4), gland bonnet (5), temperature sensor (6), rubber plug (7), plastic sheet (8) and gauze (9);
Described circular capillaries (1) is communicated with tubule (2) with circular extra heavy pipe (3) by bottom and is interconnected; The top of described circular extra heavy pipe (3) has two holes, wherein, a hole adopts gland bonnet (5) to seal, and another hole is communicated with opening tubule (4), and described opening tubule (4) adopts rubber plug (7) to seal;
Described organic phase-change heat-storage material is arranged in circular extra heavy pipe (3) by gauze (9), and is fixed on the bottom of gland bonnet (5) and can not floats in opening tubule (4); Described temperature sensor (6) is fixed on record in circular extra heavy pipe (3) and comprises the temperature variation of the overall liquid-phase system of organic phase-change heat-storage material;
In described circular capillaries (1), the water surface is provided with plastic sheet (8).
2. the proving installation of a kind of Organic phase change thermal storage material cubic deformation according to claim 1, is characterized in that described opening tubule (4) diameter is less than circular extra heavy pipe (3) diameter.
3. the proving installation of a kind of Organic phase change thermal storage material cubic deformation according to claim 1 and 2, is characterized in that the height of described opening tubule (4) is greater than the height 30 ~ 50mm of gland bonnet (5).
4. the proving installation of a kind of Organic phase change thermal storage material cubic deformation according to claim 3, is characterized in that the material of described connection container (10) is glass or engineering plastics.
5. a method of testing for Organic phase change thermal storage material cubic deformation, is characterized in that it realizes according to the following steps:
Step one: weighed by connection container (10), quality is M
1, and taking a certain amount of organic phase-change heat-storage material, quality is m;
Step 2: the water being injected 2/3 height by opening tubule (4) in the circular extra heavy pipe (3) in connection container (10), wrap the organic phase-change heat-storage material weighed up with gauze (9), put into from opening tubule (4) lower end being sealed lid (5);
Continue to be filled to opening tubule (4) mouth of pipe place to flush, with rubber plug (7) jam-pack, connection container is rocked up and down and leaves standstill a period of time, after bubble is discharged completely, the mouth of pipe being filled to open tube (4) again flushes, with rubber plug (7) jam-pack;
Continue to be filled to its height higher than opening tubule (4) more than mouth of pipe 50mm in connection container (10) by circular capillaries (1), again plastic sheet (8) is put on the water surface of circular capillaries (1), wipe connection container (10) surface moisture, weighed by connection container (10) after water filling, quality is M
2;
Step 3: whole connection container (10) is put into water bath heating device (11), by the initial temperature T of laser displacement sensor (12) record connection container (10) interior liquid
1directly over the tubule (1) with fixed support (13) laser displacement sensor (12) being fixed to connection container (10), with the initial distance L of laser displacement inductor (11) record plastic sheet (8)
1;
Step 4: start water-bath thermal (11), by the temperature of temperature sensor (6) monitoring connection container (10) interior water, the temperature of water need higher than the phase transition temperature of organic phase-change heat-storage material, after heating certain hour, after treating that the complete phase transformation of organic phase-change heat-storage material is stable, by the temperature T of temperature sensor (6) record connection container (10) interior liquid
2, and the distance L of plastic sheet (8) is tested with laser displacement inductor (12)
2;
Step 5: calculate organic phase-change heat-storage material volume change
The water-head △ L=L produced by organic phase-change heat-storage material phase change expansion
1-L
2-L
water, L
waterthe height that water expanded by heating rises at circular capillaries (1) place,
α is the thermal expansivity of water, ρ
waterbe the density of water, D is the diameter being communicated with circular capillaries (1);
The density of known organic phase-change heat-storage material is ρ, can calculate organic phase-change heat-storage material volume change by following formula
By arranging, finally organic phase-change heat-storage material volume change can be calculated as follows:
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| CN107192732A (en) * | 2017-05-24 | 2017-09-22 | 谷迁乔 | A kind of fire trapping ring core expansion character automatic testing equipment and its method of testing |
| CN107843549A (en) * | 2017-12-13 | 2018-03-27 | 湖南工业大学 | A kind of lower material volume measure of the change devices and methods therefor of multiple physical field effect |
| CN108020580A (en) * | 2017-12-27 | 2018-05-11 | 贵州大学 | The measuring device and method of metal material phase transition temperature |
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| CN112485289A (en) * | 2020-10-29 | 2021-03-12 | 西安近代化学研究所 | Volume irreversible growth detection device and detection method for NTO-based fusion cast explosive |
| CN112682834B (en) * | 2021-01-23 | 2021-09-17 | 北京嘉洁能科技股份有限公司 | Carbon fiber intelligent heat supply method and system based on phase change energy storage building envelope heat insulation |
| CN112682834A (en) * | 2021-01-23 | 2021-04-20 | 北京嘉洁能科技股份有限公司 | Carbon fiber intelligent heat supply method and system based on phase change energy storage building envelope heat insulation |
| CN114543744A (en) * | 2022-02-24 | 2022-05-27 | 上海海事大学 | Equipment for deformation test of aerospace phase-change energy storage device |
| CN116359281A (en) * | 2023-06-02 | 2023-06-30 | 扬中市国鹰电器有限公司 | Test equipment and test method for electric heating device |
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