CN103528999B - Inorganic hydrous salt phase transition material phase layering measurement mechanism and measuring method thereof - Google Patents
Inorganic hydrous salt phase transition material phase layering measurement mechanism and measuring method thereof Download PDFInfo
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- CN103528999B CN103528999B CN201310463578.6A CN201310463578A CN103528999B CN 103528999 B CN103528999 B CN 103528999B CN 201310463578 A CN201310463578 A CN 201310463578A CN 103528999 B CN103528999 B CN 103528999B
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Abstract
Inorganic hydrous salt phase transition material phase layering measurement mechanism and measuring method thereof, relate to a kind of phase layering measurement mechanism and use the measuring method of this device.Coarse to solve existing inorganic hydrous salt phase transition material phase layering measuring method, can not accurate quantification, problem that degree of accuracy is low.Transparent vessel and base are from top to bottom successively set in casing, three-back-shaped cuboid-sheath is located on transparent vessel, photoelectric cell and bulb are oppositely arranged in three-back-shaped rectangular parallelepiped respectively, and one end of two slide bars can be located in casing by pull, and the other end of two slide bars is connected with handle.Method: the heating of inorganic hydrous salt phase transition material; The cold cycling of inorganic hydrous salt phase transition material; Draw phase-change material altitude curve in photoelectric cell electric current-container; Improve phase-change material altitude curve in photoelectric cell electric current-container; Calculate the phase degree of layering phase delamination degree of inorganic hydrous salt phase transition material; Determine degree of layering.The present invention is used for the layering of inorganic hydrous salt phase transition material phase and measures.
Description
Technical field
The present invention relates to a kind of inorganic hydrous salt phase transition material phase layering measurement mechanism and measuring method thereof, belong to inorganic phase-changing material performance evaluation field.
Background technology
Solid can occur solid-, the material of any one phase transformation in solid-liquid, liquid-gas or consolidate-gas four kinds of phase transformations, all can be described as phase-change material.It is that one thing phase change can occur near phase transition temperature, a class special material of simultaneously stability or release amount of heat.Phase-change material mainly contains three classes: inorganic phase-changing material, organic phase change material, composite phase-change material.Inorganic hydrous salt phase transition material is because there being suitable phase transition temperature, and thermal conductivity is large, and the advantages such as latent heat of phase change is large, are widely used in solar energy heat-storage, the fields such as building energy conservation.But inorganic hydrous salt phase transition material also exists two subject matters in actual applications, namely cross the layering of cold-peace phase, they have a strong impact on the usability of inorganic hydrous salt phase transition material.
Inorganic hydrous salt phase transition material, in the process of long-term hot SAPMAC method, easily occurs the phenomenon that solute is separated out being phase layering.Solute is comparatively large because of density, and can deposit to bottom, the inorganic salts of bottom cannot be combined with water and generate hydrated salt, do not have the effect of energy storage heat release, along with the increase of hot SAPMAC method number of times, hydrous salt phase change material can progressively reduce its heat storage capacity, and the loss of its latent heat of phase change increases.At present, the method weighing the layering of inorganic hydrous salt phase transition material phase mainly takes observation method of naked eye, or is taken pictures by camera, observes inorganic hydrous salt phase transition material phase degree of layering in test tube, these class methods do not have the quantizating index of clear and definite phase delamination degree, just rough observation and estimation.Therefore, obtain a kind of weigh inorganic hydrous salt phase transition material phase degree of layering comparatively accurately and the method for testing quantized be very necessary.
Summary of the invention
The object of this invention is to provide a kind of inorganic hydrous salt phase transition material phase layering measurement mechanism and measuring method thereof, coarse to solve existing inorganic hydrous salt phase transition material phase layering measuring method, can not accurate quantification, problem that degree of accuracy is low.
The present invention solves the problems of the technologies described above the technical scheme taked to be:
Inorganic hydrous salt phase transition material phase layering measurement mechanism, comprises casing; Described inorganic hydrous salt phase transition material phase layering measurement mechanism also comprises transparent vessel, base, three-back-shaped rectangular parallelepiped, photoelectric cell, LED light source, handle and two slide bars, transparent vessel and base are from top to bottom successively set in casing, three-back-shaped cuboid-sheath is located on transparent vessel, photoelectric cell and LED light source are oppositely arranged in three-back-shaped rectangular parallelepiped respectively, one end of two slide bars can be located in casing by pull, and one end of two slide bars is arranged on three-back-shaped rectangular parallelepiped, the other end of two slide bars is connected with handle.
The method of inorganic hydrous salt phase transition material phase layering measurement mechanism, it comprises following operation steps:
Step one: first, transparent vessel is taken out in the bottom of casing, by 4/5ths of the volume of inorganic hydrous salt phase transition filled with material transparent vessel, then, placed by transparent vessel and heat in an oven, its heating-up temperature remains on more than the phase transformation temperature points of inorganic hydrous salt phase transition material 10 DEG C-30 DEG C, and this heating-up temperature is defined as T, the actual temp of T specifically can set, until inorganic hydrous salt phase transition material melts is liquid according to the difference of phase-change material and the difference of environment for use;
Step 2: take out transparent vessel, cool in atmosphere, until the complete solidification and crystallization of inorganic hydrous salt phase transition material, then, again transparent vessel is put into baking oven to heat, heating-up temperature is still T, heating, and---cooling---heating again---cools again, until to a certain cold cycling frequency n set by test
0after, again heat inorganic hydrous salt phase transition material to temperature T, take out from baking oven and put back in casing 1 immediately;
Step 3: open LED light source and photronic switch, photoelectric cell shows current values by reometer, record this numerical value, handle connects the position of the zero graduation value that two slide bars show just for being equipped with the reference position of phase-change material container bottom, reads and records reometer display current values now; Subsequently, upwards promote handle with the height being spaced apart 2cm at every turn, promoting number of times is 5-10 time, records altitude scale value and the reometer display current values of two slide bars of all correspondences, and draws phase-change material altitude curve in photoelectric cell electric current-container;
Step 4: repeat step 2 N time, the mode record numerical value of step 3 for another example, draws phase-change material altitude curve in N bar photoelectric cell electric current-container, until meet the cold cycling times N × n of inorganic hydrous salt phase transition material needed for test design
0till;
Step 5: the phase degree of layering calculating inorganic hydrous salt phase transition material;
Every N × n
0after secondary cold cycling, the phase degree of layering phase delamination degree Φ of inorganic hydrous salt phase transition material
n × n0characterize, concrete formula is:
Wherein, i
maxfor the photoelectric cell current value of phase-change material height value maximum in container;
H
maxfor the maximal value of phase-change material height in test chamber;
S is photoelectric cell electric current with phase-change material height change curve in container and ordinate and y=i
maxthe area surrounded.
Step 6: according to the result of calculation determination degree of layering of step 5, so far, completes and measures the layering of inorganic hydrous salt phase transition material phase.
The present invention is as follows relative to the beneficial effect of prior art:
1, under cold cycling effect, be contained in the phase-change material in transparent vessel, be different because phase layering causes in the transmittancy of differing heights place phase-change material.The present invention utilizes photoelectric cell, and the light intensity transmitted through inorganic hydrous salt phase transition material is converted into photoelectric cell current signal, by setting up photoelectric cell electric current-phase-change material height relationships curve, realizes the degree of quantization signifying phase-change material phase layering.
2, photoelectric cell, illuminating source design attitude centering in the present invention, and join together with slide bar, handle, accurately can be determined the height of phase-change material in transparent vessel by the scale value on slide bar, measuring method is accurate.
3, structure of the present invention is simple, is easy to realize, and production cost is low, applied widely.
4, the present invention establishes the computing formula of phase-change material phase degree of layering, the method that instead of range estimation and taking pictures etc. is commonly used at present, achieves the quantization signifying of phase delamination degree.
Accompanying drawing explanation
Fig. 1 is front view of the present invention, and Fig. 2 is the cut-open view of Fig. 1 at A-A place, and Fig. 3 is phase-change material altitude curve in photoelectric cell electric current-container.
Embodiment
Embodiment one: composition graphs 1 and Fig. 2 illustrate present embodiment, the inorganic hydrous salt phase transition material phase layering measurement mechanism of present embodiment, comprises casing 1; Described inorganic hydrous salt phase transition material phase layering measurement mechanism also comprises transparent vessel 2, base 3, three-back-shaped rectangular parallelepiped 4, photoelectric cell 5, LED light source 6, handle 7 and two slide bars 8, transparent vessel 2 and base 3 are successively set in casing 1 from top to bottom, three-back-shaped rectangular parallelepiped 4 is set on transparent vessel 2, photoelectric cell 5 and LED light source 6 are oppositely arranged in three-back-shaped rectangular parallelepiped 4 respectively, one end of two slide bars 8 can be located in casing 1 by pull, and one end of two slide bars 8 is arranged on three-back-shaped rectangular parallelepiped 4, the other end of two slide bars 8 is connected with handle 7.
When handle 7 is not mentioned, three-back-shaped rectangular parallelepiped 4 is just in time placed in bottom casing 1, and now the light of LED light source 6 wears the least significant end being emitted through transparent vessel 2 just.
Present embodiment accurately controls the liquid level of solution level height of transparent vessel 2 inside at three-back-shaped rectangular parallelepiped 4 place by lift-pull handle 7, namely the height that handle 7 is mentioned equals three-back-shaped rectangular parallelepiped 4 and leaves height bottom casing 1, i.e. the height of phase-change material in container.
Embodiment two: composition graphs 1 and Fig. 2 illustrate, present embodiment inorganic hydrous salt phase transition material phase layering measurement mechanism also comprises two sleeve pipes 9, and one end of every root slide bar 8 and the intersection of casing 1 are provided with a sleeve pipe 9.So arrange present embodiment, object ensures graduated slide bar 8 oriented sliding of band.In present embodiment, undocumented technical characteristic is identical with embodiment one.
Embodiment three: composition graphs 1 and Fig. 2 illustrate, present embodiment two slide bars 8 are equipped with scale value, and the intersection of two slide bars 8 and handle 7 is the zero graduation of described scale value.So present embodiment is set, is with graduated slide bar 8 to be 0mm with handle 7 intersection, evenly indicates a millimeter scale downwards successively, scale value shown in sleeve pipe 9 upper end, be handle 7 and draw the height carried.In present embodiment, undocumented technical characteristic is identical with embodiment two.
Embodiment four: composition graphs 1 and Fig. 2 illustrate, are arranged with slotted eye 10 in the three-back-shaped rectangular parallelepiped 4 of present embodiment.The light that the LED light source 6 of present embodiment sends is worn by slotted eye 10 and is emitted through transparent vessel 2, and is received by the photoelectric cell 5 of its opposite side, changes into corresponding current signal.In present embodiment, undocumented technical characteristic is identical with embodiment three.
Embodiment five: composition graphs 1 and Fig. 2 illustrate, present embodiment slotted eye 10 is rectangle slotted eye.The light intensity that photoelectric cell 5 receives is stronger, and current value is larger.In present embodiment, undocumented technical characteristic is identical with embodiment four.
Embodiment six: composition graphs 1 and Fig. 2 explanation, present embodiment casing 1 is opaque plastics casing, and three-back-shaped rectangular parallelepiped 4 inside except slotted eye 10 and settle LED light source 6 and photoelectric cell 5 space except, it is all solid opaque engineering plastics material, avoid extraneous light access to plant inner with this, cause photoelectric cell to be interfered.In present embodiment, undocumented technical characteristic is identical with embodiment one or five.
Embodiment seven: composition graphs 1 and Fig. 2 illustrate, present embodiment transparent vessel 2 for rectangular parallelepiped transparent vessel and the light of LED light source 6 wear along the transversal face length limit of transparent vessel 2 and penetrate and mistake.Setting like this, object increases light to wear the light path being emitted through transparent vessel 2, and light is more absorbed by inorganic hydrous salt phase transition material solution, and the light intensity change that photoelectric cell receives obviously, improves the sensitivity of current signal with this.In present embodiment, undocumented technical characteristic is identical with embodiment seven.
Embodiment eight: composition graphs 1 and Fig. 2 explanation, present embodiment transparent vessel 2 and base 3 are fixed as one, setting like this, object utilizes base 3 by padded for transparent vessel 2, so that the light being placed in three-back-shaped rectangular parallelepiped 4 LED light source 6 bottom casing 1 is worn just be emitted through transparent vessel 2 least significant end.
Embodiment nine: composition graphs 1-Fig. 3 illustrates, the method for present embodiment inorganic hydrous salt phase transition material phase layering measurement mechanism, it comprises following operation steps:
Step one: first, transparent vessel 2 is taken out in the bottom of casing 1, by 4/5ths of the volume of inorganic hydrous salt phase transition filled with material transparent vessel 2, then, placed by transparent vessel 2 and heat in an oven, its heating-up temperature remains on more than the phase transformation temperature points of inorganic hydrous salt phase transition material 10 DEG C-30 DEG C, and this heating-up temperature is defined as T, the actual temp of T specifically can set, until inorganic hydrous salt phase transition material melts is liquid according to the difference of phase-change material and the difference of environment for use;
Step 2: take out transparent vessel 2, cool in atmosphere, until the complete solidification and crystallization of inorganic hydrous salt phase transition material, then, again transparent vessel 2 is put into baking oven to heat, heating-up temperature is still T, heating, and---cooling---heating again---cools again, until to a certain cold cycling frequency n set by test
0after, again heat inorganic hydrous salt phase transition material to temperature T, take out from baking oven and put back in casing 1 immediately;
Step 3: the switch opening LED light source 6 and photoelectric cell 5, photoelectric cell 5 shows current values by reometer, record this numerical value, handle 7 connects the position of the zero graduation value of display on two slide bars 8 just for being equipped with the reference position of phase-change material container bottom, reads and records reometer display current values now; Subsequently, upwards promote handle 7 with the height being spaced apart 2cm at every turn, promoting number of times is 5-10 time, records altitude scale value and the reometer display current values of two slide bars 8 of all correspondences, and draws phase-change material altitude curve in photoelectric cell electric current-container;
Step 4: repeat step 2 N time, the mode record numerical value of step 3 for another example, draws phase-change material altitude curve in N bar photoelectric cell electric current-container, until meet the cold cycling times N × n of inorganic hydrous salt phase transition material needed for test design
0till;
Step 5: the phase degree of layering calculating inorganic hydrous salt phase transition material;
Every N × n
0after secondary cold cycling, the phase degree of layering phase delamination degree Φ of inorganic hydrous salt phase transition material
n × n0characterize, concrete formula is:
Wherein, i
maxfor the photoelectric cell current value of phase-change material height value maximum in container;
H
maxfor the maximal value of phase-change material height in test chamber;
S is photoelectric cell electric current with phase-change material height change curve in container and ordinate and y=i
maxthe area surrounded.
Step 6: according to the result of calculation determination degree of layering of step 5, so far, completes and measures the layering of inorganic hydrous salt phase transition material phase.
Principle of work of the present invention is:
Principle of work: inorganic hydrous salt phase transition material is after several times cold cycling, phase layering in various degree can be there is, part solute can emanate out, and is deposited on the latter half of transparent vessel gradually, and namely in transparent vessel, the penetrability of solution reduces from top to bottom successively.The present invention utilizes photoelectric cell, light intensity transmitted through inorganic hydrous salt phase transition material is converted into intensity signals, because the solution at the differentiated levels place of transparent vessel is different through light intensity, so photronic strength of current is also different, the present invention is by drawing phase-change material altitude curve in photoelectric cell electric current-container, and as described in above-mentioned step 6, calculate phase delamination degree Φ, inorganic hydrous salt phase transition material phase degree of layering is characterized with this, phase delamination degree Φ is larger, and the layering of inorganic hydrous salt phase transition material phase is more serious.
Claims (5)
1. an inorganic hydrous salt phase transition material phase layering measurement mechanism, comprise casing (1), transparent vessel (2), base (3), three-back-shaped rectangular parallelepiped (4), photoelectric cell (5), LED light source (6), handle (7), two slide bars (8) and two sleeve pipes (9), transparent vessel (2) and base (3) are successively set in casing (1) from top to bottom, three-back-shaped rectangular parallelepiped (4) is set on transparent vessel (2), photoelectric cell (5) and LED light source (6) are oppositely arranged in three-back-shaped rectangular parallelepiped (4) respectively, one end of two slide bars (8) can be located in casing (1) by pull, and one end of two slide bars (8) is arranged on three-back-shaped rectangular parallelepiped (4), the other end of two slide bars (8) is connected with handle (7), one end of every root slide bar (8) and the intersection of casing (1) are provided with a sleeve pipe (9), it is characterized in that: described two slide bars (8) are equipped with scale value, and the intersection of two slide bars (8) and handle (7) is the zero graduation of described scale value, slotted eye (10) is arranged with in described three-back-shaped rectangular parallelepiped (4), and slotted eye (10) is rectangle slotted eye.
2. inorganic hydrous salt phase transition material phase layering measurement mechanism according to claim 1, is characterized in that: described casing (1) is opaque plastics casing.
3. inorganic hydrous salt phase transition material phase layering measurement mechanism according to claim 2, it is characterized in that: described transparent vessel (2) is rectangular parallelepiped transparent vessel, and the light of LED light source (6) is worn along the transversal face length limit of transparent vessel (2) and is penetrated and mistake.
4. inorganic hydrous salt phase transition material phase layering measurement mechanism according to claim 3, is characterized in that: described transparent vessel (2) and base (3) are fixed as one.
5. use a method for the inorganic hydrous salt phase transition material phase layering measurement mechanism described in claim 1, it is characterized in that: it comprises following operation steps:
Step one: first, transparent vessel (2) is taken out in the bottom of casing (1), by 4/5ths of the volume of inorganic hydrous salt phase transition filled with material transparent vessel (2), then, transparent vessel (2) is placed and heats in an oven, its heating-up temperature remains on more than the phase transformation temperature points of inorganic hydrous salt phase transition material 10 DEG C-30 DEG C, this heating-up temperature is defined as T, the actual temp of T specifically can set, until inorganic hydrous salt phase transition material melts is liquid according to the difference of phase-change material and the difference of environment for use;
Step 2: take out transparent vessel (2), cool in atmosphere, until the complete solidification and crystallization of inorganic hydrous salt phase transition material, then, again transparent vessel (2) is put into baking oven to heat, heating-up temperature is still T, heating, and---cooling---heating again---cools again, until to a certain cold cycling frequency n set by test
0after, again heat inorganic hydrous salt phase transition material to temperature T, take out from baking oven and put back in casing (1) immediately;
Step 3: the switch opening LED light source (6) and photoelectric cell (5), photoelectric cell (5) shows current values by reometer, record this numerical value, handle (7) connects the position of the zero graduation value of the upper display of two slide bars (8) just for being equipped with the reference position of phase-change material container bottom, reads and records reometer display current values now; Subsequently, handle (7) is upwards promoted with the height being spaced apart 2cm at every turn, promoting number of times is 5-10 time, records altitude scale value and the reometer display current values of two slide bars (8) of all correspondences, and draws phase-change material altitude curve in photoelectric cell electric current-container;
Step 4: repeat step 2 N time, the mode record numerical value of step 3 for another example, draws phase-change material altitude curve in N bar photoelectric cell electric current-container, until meet the cold cycling times N × n of inorganic hydrous salt phase transition material needed for test design
0till;
Step 5: the phase degree of layering calculating inorganic hydrous salt phase transition material;
Every N × n
0after secondary cold cycling, the phase degree of layering phase delamination degree Φ of inorganic hydrous salt phase transition material
n × n0characterize, concrete formula is:
Wherein, i
maxfor the photoelectric cell current value of phase-change material height value maximum in container;
H
maxfor the maximal value of phase-change material height in test chamber;
S is photoelectric cell electric current with phase-change material height change curve in container and ordinate and y=i
maxthe area surrounded;
Step 6: according to the result of calculation determination degree of layering of step 5, so far, completes and measures the layering of inorganic hydrous salt phase transition material phase.
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| CN113484355B (en) * | 2021-06-30 | 2023-03-17 | 中国科学院青海盐湖研究所 | Method for testing cycle performance of phase change energy storage material of hydrated salt system and application |
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| JP2823123B2 (en) * | 1988-03-09 | 1998-11-11 | 出光興産 株式会社 | Method and apparatus for measuring critical value of phase change |
| JP5141156B2 (en) * | 2007-09-21 | 2013-02-13 | トヨタ自動車株式会社 | Method of dispersing microencapsulated phase change material in fluorine-based solvent, dispersion, and coolant for fuel cell stack |
| US20090184283A1 (en) * | 2008-01-18 | 2009-07-23 | Deborah Duen Ling Chung | Antioxidants for phase change ability and thermal stability enhancement |
| CN101975792B (en) * | 2010-09-14 | 2013-06-26 | 中国科学技术大学 | System for testing stability of solid-liquid phase change materials |
| CN201795988U (en) * | 2010-09-25 | 2011-04-13 | 合肥工业大学 | Sensing device for detecting transparency of lake water quality |
| CN102401791A (en) * | 2010-12-17 | 2012-04-04 | 武汉纺织大学 | Method for detecting transparency transmission of mixed liquid |
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