CN114874757B - Working medium pair suitable for cross-season three-phase absorption type energy storage cycle and preparation method thereof - Google Patents
Working medium pair suitable for cross-season three-phase absorption type energy storage cycle and preparation method thereof Download PDFInfo
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- CN114874757B CN114874757B CN202210404169.8A CN202210404169A CN114874757B CN 114874757 B CN114874757 B CN 114874757B CN 202210404169 A CN202210404169 A CN 202210404169A CN 114874757 B CN114874757 B CN 114874757B
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Abstract
The invention discloses a three-phase absorption type energy storage circulation system suitable for cross seasonsA pair of ring working media and a preparation method thereof. The working medium pair comprises: lithium chloride aqueous solution, ethylene glycol, silica nanoparticles, and gum arabic. The invention is realized by the method in the traditional LiCl/H 2 The ethylene glycol, the silicon dioxide nano particles and the gum arabic are added in the O working medium pair, so that the working concentration range of LiCl aqueous solution is widened, the solubility of LiCl in water is improved, the solubility of LiCl in a high concentration state is increased, and after the concentration of LiCl exceeds the solubility, stable suspended fine crystals can be formed in the solution, and the risk brought by crystallization is greatly reduced while the energy storage density is improved. The working substance pair can be used within the temperature range of 75-90 ℃ of a heat source, has the capacity of simultaneously supplying cold and heat, and can output cold water with the temperature of 5-20 ℃ and hot water with the temperature of 40-50 ℃.
Description
Technical Field
The invention relates to the technical field of absorption energy storage, in particular to a working medium pair suitable for cross-season three-phase absorption energy storage circulation and a preparation method thereof.
Background
The common absorption energy storage working medium pair at present is the same as the working medium pair used by an absorption refrigeration system and comprises LiCl/H 2 O，LiBr/H 2 O, etc., the working substance pair has strong water absorption and high energy storage density, and the energy storage density is related to the working concentration difference of LiCl and LiBr in the water solution before and after energy storage. But LiCl/H 2 O，LiBr/H 2 The O and other working substances have the risk of crystallization when the energy is stored at high concentration, and the dissolution rate of massive crystals is low, so that the energy release rate can be reduced. In addition, the large crystals cause damage to the operation of the pipeline and pump, which is detrimental to the safe and stable operation of the system.
The current common method for preventing crystallization is mainly to avoid crystallization by controlling the temperature and working concentration difference of the absorption cycle, but the method limits the working concentration range of the working medium pair, thereby sacrificing a part of energy storage potential of the working medium pair.
Accordingly, there is a need for improvement and development in the art.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a working medium pair suitable for cross-season three-phase absorption type energy storage circulation and a preparation method thereof, and aims to solve the problems that the working concentration range of the existing absorption type energy storage working medium pair is limited, and a part of energy storage potential of the working medium pair is sacrificed.
The technical scheme of the invention is as follows:
a working substance pair suitable for a cross-season three-phase absorption energy storage cycle, wherein the working substance pair comprises: lithium chloride aqueous solution, ethylene glycol, silica nanoparticles, and gum arabic.
Alternatively, the working pair consists of lithium chloride aqueous solution, ethylene glycol, silica nanoparticles and gum arabic.
Optionally, the mass ratio of the lithium chloride aqueous solution to the ethylene glycol to the silica nanoparticles to the gum arabic is 100:15-18:0.5-2:1, wherein the mass concentration of lithium chloride in the lithium chloride aqueous solution is 35% -53%.
Optionally, the working medium pair is used within a heat source temperature range of 75-90 ℃.
Optionally, the diameter of the silica nanoparticle is 15-20 nm.
The invention discloses a preparation method of a working substance pair suitable for cross-season three-phase absorption energy storage circulation, which comprises the following steps:
mixing lithium chloride aqueous solution with ethylene glycol, adding silicon dioxide nano particles and gum arabic, stirring and performing ultrasonic treatment to obtain the working medium pair.
Optionally, the step of mixing the lithium chloride aqueous solution with ethylene glycol and adding silica nanoparticles and gum arabic specifically comprises:
dissolving lithium chloride in water, adding ethylene glycol and gum arabic into the lithium chloride aqueous solution after complete dissolution to obtain a mixed solution, and adding silica nanoparticles into the mixed solution.
Optionally, the step of mixing the lithium chloride aqueous solution with ethylene glycol and adding silica nanoparticles and gum arabic specifically comprises:
dissolving lithium chloride in water, adding ethylene glycol into the lithium chloride aqueous solution after the lithium chloride is completely dissolved to obtain a mixed solution, adding silicon dioxide nano particles into the mixed solution, and then adding gum arabic.
Optionally, the mass ratio of the lithium chloride aqueous solution to the ethylene glycol to the silica nanoparticles to the gum arabic is 100:15-18:0.5-2:1; wherein the mass concentration of lithium chloride in the lithium chloride aqueous solution is 35% -53%.
Optionally, the diameter of the silica nanoparticle is 15-20 nm.
The beneficial effects are that: the invention is realized by the method in the traditional LiCl/H 2 The ethylene glycol, the silicon dioxide nano particles and the gum arabic are added in the O working medium pair, so that the working concentration range of LiCl aqueous solution is widened, the solubility of LiCl in water is improved, the solubility of LiCl in a high concentration state is increased, and after the concentration of LiCl exceeds the solubility, stable suspended fine crystals can be formed in the solution, and the risk brought by crystallization is greatly reduced while the energy storage density is improved. The working substance pair can be used within the temperature range of 75-90 ℃ of a heat source, has the capacity of simultaneously supplying cold and heat, and can output cold water with the temperature of 5-20 ℃ and hot water with the temperature of 40-50 ℃.
Drawings
FIG. 1 is a graph showing the comparison of the crystallization of the working substance pair of this example with that of an aqueous lithium chloride solution containing no additive.
Fig. 2 is the water vapor pressure of the working substance pair in example 1 at different temperatures.
Detailed Description
The invention provides a working medium pair suitable for cross-season three-phase absorption energy storage circulation and a preparation method thereof, and the invention is further described in detail below for making the purposes, the technical schemes and the effects of the invention clearer and more definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The absorption type energy storage technology has the characteristics of high energy storage density, long energy storage period and the like, and in order to realize higher energy storage density, the absorption type energy storage working medium pair often works in a wider working concentration range. However, high concentration solutions present a risk of crystallization, especially at low ambient temperatures and long storage times, where the solution is prone to crystallization during storage. After crystallization of the solution, both the energy release process and the operation of the system are less favored. Reducing the risk of crystallization while pursuing higher energy storage densities has been a technical challenge.
Based on the above, the embodiment of the invention provides a working medium pair suitable for cross-season three-phase absorption energy storage circulation, wherein the working medium pair comprises: aqueous lithium chloride (LiCl), ethylene glycol, silica nanoparticles, and gum arabic.
This example was performed by conventional LiCl/H 2 The working concentration range of the LiCl aqueous solution is widened by adding various additives (namely ethylene glycol, silica nanoparticles and gum arabic) into the O (namely the LiCl aqueous solution) working medium pair, the solubility of the LiCl in water is improved, the solubility of the LiCl in a high concentration state is increased, and after the concentration of the LiCl exceeds the solubility, stable suspended fine crystals can be formed in the solution, so that the energy storage density is improved, and the risk brought by crystallization is greatly reduced.
Specifically, adding ethylene glycol to the aqueous LiCl solution can increase the solubility of LiCl in water, thereby avoiding crystallization of LiCl at high concentrations. The addition of silica nanoparticles can promote LiCl to form stably suspended fine crystals at concentrations exceeding solubility. This is because silica nanoparticles can be uniformly dispersed and stably suspended in a solution, and the suspended silica nanoparticles provide nucleation sites for LiCl crystallization, enabling LiCl to form suspended fine crystals in a supersaturated solution. Meanwhile, the silicon dioxide nano particles can increase the heat and mass transfer efficiency of the fluid. The gum arabic is added and used as a surfactant, so that the viscosity of the working substance pair can be effectively reduced, and the surface tension of the working substance pair is reduced, so that the heat and mass transfer efficiency is higher.
In the embodiment, the glycol and the silica nanoparticles can widen the working mass concentration range of the LiCl aqueous solution from 35% -44% to 35% -53%. The aqueous solution of LiCl is supersaturated at a mass concentration of 53%, and the addition of ethylene glycol and silica nanoparticles prevents LiCl from forming large crystals in the supersaturated solution, and instead forms suspended LiCl fine crystals in the solution.
The additive-containing working fluid pair of the present embodiment has a lower vapor pressure than LiCl aqueous solutions, and the lower vapor pressure helps to increase the rate of absorption of water vapor by the working fluid pair.
The working medium pair of the embodiment can be used in a heat source temperature range of 75-90 ℃, has the capacity of simultaneously supplying cold and heat, and can output cold water with a temperature of 5-20 ℃ and hot water with a temperature of 40-50 ℃.
It should be noted that absorption energy storage (generally referred to as conventional gas-liquid two-phase absorption energy storage) has an advantage of a long energy storage period compared to conventional sensible heat energy storage and latent heat energy storage. However, compared with gas-liquid two-phase absorption energy storage, the three-phase absorption energy storage working medium pair has the defect that crystals in the working medium pair can grow, precipitate and the like in a longer time, so that the working medium pair cannot be suitable for long-period (more than 1 month) or even seasonal energy storage. The three-phase absorption type energy storage working medium pair is modified in the embodiment, so that crystals in the working medium pair can stably suspend for a long time (including cross seasons), and the working medium pair is suitable for cross-season three-phase absorption type energy storage.
In one embodiment, the pair of working media suitable for use in a three-phase absorption energy storage cycle across seasons consists of aqueous lithium chloride, ethylene glycol, silica nanoparticles, and gum arabic.
In one embodiment, the mass ratio of the lithium chloride aqueous solution, the ethylene glycol, the silica nanoparticles and the gum arabic is 100:15-18:0.5-2:1, wherein the mass concentration of lithium chloride in the lithium chloride aqueous solution is 35% -53%. The energy storage density of the traditional gas-liquid absorption energy storage is closely related to the working concentration range of the working medium pair, and if the lithium chloride aqueous solution is adopted as the working medium pair, the working concentration range is 35% -44%. In the embodiment, as the glycol and the silicon dioxide nano particles are added, the working concentration range of the lithium chloride aqueous solution can be widened to 35-53%, so that the energy storage density of the lithium chloride aqueous solution can be effectively improved.
In one embodiment, the silica nanoparticles have a diameter of 15 to 20nm. In this diameter range, good suspension properties of lithium chloride crystals can be ensured.
The embodiment of the invention also provides a preparation method of the working substance pair suitable for the seasonal three-phase absorption energy storage cycle, which comprises the following steps:
mixing lithium chloride aqueous solution with ethylene glycol, adding silicon dioxide nano particles and gum arabic, stirring (such as mechanical stirring) and performing ultrasonic treatment to obtain the working medium pair.
In one embodiment, the step of mixing the aqueous lithium chloride solution with ethylene glycol and adding silica nanoparticles and gum arabic specifically comprises:
dissolving lithium chloride in water, adding ethylene glycol and gum arabic into the lithium chloride aqueous solution after complete dissolution to obtain a mixed solution, and adding silica nanoparticles into the mixed solution.
In one embodiment, the step of mixing the aqueous lithium chloride solution with ethylene glycol and adding silica nanoparticles and gum arabic specifically comprises:
dissolving lithium chloride in water, adding ethylene glycol into the lithium chloride aqueous solution after the lithium chloride is completely dissolved to obtain a mixed solution, adding silicon dioxide nano particles into the mixed solution, and then adding gum arabic.
In order to prevent crystallization of lithium chloride solution after cooling, ethylene glycol is added when lithium chloride is completely dissolved (temperature is usually higher than 50 ℃) and temperature is still higher, and the ethylene glycol has an effect of preventing crystallization, so that massive crystals can be prevented from being precipitated after cooling the lithium chloride solution. The gum arabic may be added with the ethylene glycol or after the silica nanoparticles are added. The silica nanoparticles can be stably suspended in the solution by stirring (e.g., mechanical stirring) and ultrasonic agitation.
In one embodiment, the mass ratio of the lithium chloride aqueous solution, the ethylene glycol, the silica nanoparticles and the gum arabic is 100:15-18:0.5-2:1; wherein the mass concentration of lithium chloride in the lithium chloride aqueous solution is 35% -53%.
The invention is further illustrated by the following specific examples.
Example 1
The three-phase absorption type energy storage cycle working medium pair of the embodiment consists of a lithium chloride aqueous solution, ethylene glycol, silica nanoparticles and gum arabic, wherein the mass ratio of the lithium chloride aqueous solution to the ethylene glycol to the silica nanoparticles to the gum arabic is 100:17:2:1; wherein the mass concentration of the lithium chloride aqueous solution is 53%. The preparation method of the working substance pair comprises the following steps: dissolving lithium chloride in water, adding ethylene glycol and gum arabic into a high-temperature lithium chloride aqueous solution (dissolving exothermic) after the lithium chloride is completely dissolved to obtain a mixed solution, adding silicon dioxide nano particles into the mixed solution, and obtaining the working medium pair through mechanical stirring and ultrasonic vibration.
The crystallization of the working substance pair of this example is shown in FIG. 1 as compared with an aqueous lithium chloride solution without additives. Wherein a in fig. 1 is an aqueous solution of lithium chloride with a mass concentration of 53% containing an additive, and b in fig. 1 is an aqueous solution of lithium chloride with a mass concentration of 53% containing no additive. In the solution containing the additive (i.e., the working substance pair provided in this example), lithium chloride crystals exhibited good suspension characteristics, and the crystals did not settle to the bottom of the container, so the solution had good fluidity.
The water vapor pressures of the working substance pair at different temperatures in this example are shown in fig. 2. The vapor pressure of the working substance pair is lower than that of a saturated lithium chloride aqueous solution (the mass concentration is 53%) without the additive, so that the absorption process is more facilitated. Specific vapor pressure data are shown in table 1.
Table 1, saturated steam partial pressure of the working substance pair
| Temperature/. Degree.C | 25 | 30 | 35 | 40 | 45 | 50 | 55 |
| pressure/kPa | 0.29 | 0.41 | 0.75 | 0.93 | 1.5 | 2 | 2.6 |
| Temperature/. Degree.C | 60 | 65 | 70 | 75 | 80 | 85 | |
| pressure/kPa | 3.5 | 4.4 | 5.5 | 6.8 | 8.5 | 11.2 |
In summary, the invention provides a working medium pair suitable for seasonal three-phase absorption energy storage cycle and a preparation method thereof. The invention is realized by the method in the traditional LiCl/H 2 The ethylene glycol, the silicon dioxide nano particles and the gum arabic are added in the O working medium pair, so that the working concentration range of LiCl aqueous solution is widened, the solubility of LiCl in water is improved, the solubility of LiCl in a high concentration state is increased, and after the concentration of LiCl exceeds the solubility, stable suspended fine crystals can be formed in the solution, and the risk brought by crystallization is greatly reduced while the energy storage density is improved. The working substance pair can be used within the temperature range of 75-90 ℃ of a heat source, has the capacity of simultaneously supplying cold and heat, and can output cold water with the temperature of 5-20 ℃ and hot water with the temperature of 40-50 ℃.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (8)
1. A pair of working media suitable for cross-season three-phase absorption energy storage cycle, the pair of working media comprising: lithium chloride aqueous solution, ethylene glycol, silica nanoparticles, and gum arabic;
the mass ratio of the lithium chloride aqueous solution to the ethylene glycol to the silicon dioxide nano particles to the gum arabic is 100:15-18:0.5-2:1, wherein the mass concentration of the lithium chloride in the lithium chloride aqueous solution is 35% -53%;
the preparation method of the working substance pair suitable for the cross-season three-phase absorption type energy storage cycle comprises the following steps:
mixing lithium chloride aqueous solution with ethylene glycol, adding silicon dioxide nano particles and gum arabic, stirring and performing ultrasonic treatment to obtain the working medium pair.
2. The pair of working media for a cross-season three-phase absorption energy storage cycle of claim 1, wherein the pair of working media consists of aqueous lithium chloride, ethylene glycol, silica nanoparticles, and gum arabic.
3. The pair of working fluids for use in a cross-season three-phase absorption energy storage cycle of claim 1, wherein the pair of working fluids is used within a heat source temperature range of 75-90 ℃.
4. The working substance pair suitable for cross-season three-phase absorption energy storage cycle of claim 1, wherein the diameter of the silica nanoparticles is 15-20 nm.
5. A method of preparing a working fluid pair suitable for use in a cross-season three-phase absorption energy storage cycle as claimed in any one of claims 1 to 4, comprising the steps of:
mixing lithium chloride aqueous solution with ethylene glycol, adding silicon dioxide nano particles and gum arabic, and stirring and carrying out ultrasonic treatment to obtain the working medium pair;
the mass ratio of the lithium chloride aqueous solution to the glycol to the silica nanoparticles to the gum arabic is 100:15-18:0.5-2:1; wherein the mass concentration of lithium chloride in the lithium chloride aqueous solution is 35% -53%.
6. The method for preparing a working substance pair suitable for a three-phase absorption energy storage cycle across seasons according to claim 5, wherein the step of mixing an aqueous lithium chloride solution with ethylene glycol and adding silica nanoparticles and gum arabic specifically comprises:
dissolving lithium chloride in water, adding ethylene glycol and gum arabic into the lithium chloride aqueous solution after complete dissolution to obtain a mixed solution, and adding silica nanoparticles into the mixed solution.
7. The method for preparing a working substance pair suitable for a three-phase absorption energy storage cycle across seasons according to claim 5, wherein the step of mixing an aqueous lithium chloride solution with ethylene glycol and adding silica nanoparticles and gum arabic specifically comprises:
dissolving lithium chloride in water, adding ethylene glycol into the lithium chloride aqueous solution after the lithium chloride is completely dissolved to obtain a mixed solution, adding silicon dioxide nano particles into the mixed solution, and then adding gum arabic.
8. The method for preparing a working substance pair suitable for a cross-season three-phase absorption energy storage cycle according to claim 5, wherein the diameter of the silica nanoparticles is 15-20 nm.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009035413A1 (en) * | 2007-09-10 | 2009-03-19 | National University Of Singapore | A chitosan solution and method of preparing the same |
| CN105579804A (en) * | 2013-07-29 | 2016-05-11 | 能源及环境研究中心基金会 | Heat dissipation systems with hygroscopic working fluid |
| CN106753259A (en) * | 2016-11-25 | 2017-05-31 | 贺迈新能源科技（上海）有限公司 | The heat accumulating and preparation method of a kind of low transformation temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009035413A1 (en) * | 2007-09-10 | 2009-03-19 | National University Of Singapore | A chitosan solution and method of preparing the same |
| CN105579804A (en) * | 2013-07-29 | 2016-05-11 | 能源及环境研究中心基金会 | Heat dissipation systems with hygroscopic working fluid |
| CN106753259A (en) * | 2016-11-25 | 2017-05-31 | 贺迈新能源科技（上海）有限公司 | The heat accumulating and preparation method of a kind of low transformation temperature |
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