CN113587269A - Solution dehumidification/regenerator based on electrostatic field interface enhancement - Google Patents
Solution dehumidification/regenerator based on electrostatic field interface enhancement Download PDFInfo
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- CN113587269A CN113587269A CN202110742663.0A CN202110742663A CN113587269A CN 113587269 A CN113587269 A CN 113587269A CN 202110742663 A CN202110742663 A CN 202110742663A CN 113587269 A CN113587269 A CN 113587269A
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- solution
- regenerator
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- dehumidifier
- power supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/1458—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification using regenerators
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a solution dehumidifier/regenerator based on electrostatic field interface enhancement, which comprises two shell channels and a power supply, wherein the two shell channels are arranged in parallel and used for the passage of a dehumidifying solution; the shell channels are of a tetrahedral structure, the opposite surfaces between the two shell channels are all metal porous films, and the other three surfaces are organic glass; in each shell channel, a metal wire is embedded on the organic glass opposite to the metal porous film; the two shell channels are connected through an upper baffle and a lower baffle which are arranged in parallel to form an air channel; the positive pole of the power supply is respectively connected with the metal porous films of the two shell channels, and the negative pole of the power supply is respectively connected with the metal wires of the two shell channels. The solution dehumidifier/regenerator changes the ion distribution in the interface layer and the surface tension of the solution by utilizing the attraction of an external electrostatic field at the interface to ions in the salt solution and the directional arrangement of water molecules, enhances the original migration tendency of the water molecules and strengthens the mass transfer effect.
Description
Technical Field
The invention belongs to the technical field of solution dehumidification, and particularly relates to a solution dehumidification/regenerator based on electrostatic field interface enhancement.
Background
Since the conception of the liquid dehumidifying air-conditioning system was proposed in the 50 s of the 20 th century, the solution dehumidifying system has been widely researched and applied, and the main application fields are house, textile, frost suppression of a refrigeration house, compressed air drying and the like. The solution dehumidifying system consists of a dehumidifier and a regenerator. In the dehumidifier, a dehumidifying solution with lower water vapor partial pressure is contacted with air to be dehumidified, and water in the air is driven to be transferred to the solution by water vapor partial pressure difference, so that the aim of reducing the moisture content of the air is fulfilled; in the regenerator, the migration direction of water molecules is opposite to that of the water molecules, so that the aim of increasing the concentration of the dehumidifying solution is fulfilled. The technology can efficiently utilize renewable energy, waste heat and waste heat energy, realize air dehumidification under the drive of low-grade heat energy, and simultaneously realize decoupling treatment of air temperature and humidity, thereby having considerable energy-saving application prospect.
In a solution dehumidification system, the heat and mass transfer process of air and solution has an important influence on the performance of the whole system. When the temperature of the low-grade heat source is lower, the regeneration rate is also reduced, and the regeneration amount and the dehumidification amount cannot be in balanced matching at the moment, which seriously affects the stable and efficient operation of the system, so that additional energy consumption is needed for auxiliary heating. On the other hand, the regeneration temperature is an important parameter influencing the regeneration performance, the higher the regeneration temperature is, the better the regeneration performance is, but too high regeneration temperature will cause the material of the device to deform, further influencing the size and the mechanical strength of the material, and causing the reduction of the product quality. By strengthening the heat and moisture transfer between the solution in the dehumidifier/regenerator and the air, the regeneration energy consumption can be greatly reduced.
How to strengthen the heat and mass transfer process of dehumidification and regeneration is one of the hot problems of research in recent years, in particular to research on gas-liquid mass transfer by an external physical field, such as a magnetic field, an electric field, an ultrasonic field, a supergravity field and the like. Among them, the means of electric field enhancement has been applied to material drying, gas absorption, etc., but the research for the field of solution dehumidification is less. Meanwhile, the theory of interface strengthening is also developed, interface strengthening heat and mass transfer based on solar energy is researched more, the thin layer of the heating interface is easier to heat the whole solution phase, so that the utilization efficiency of energy is improved, the mass transfer behavior is essentially generated at the interface, and the mass transfer efficiency is greatly improved if the strengthened focusing point is placed in the thin layer of the interface. In addition, the air flow channel in the falling film device is rarely disturbed, and the flow state of the air still has a larger optimization space.
Disclosure of Invention
In order to overcome the defect of insufficient gas-liquid mass transfer in the solution regeneration/dehumidification process, reduce the resistance between mass transfer, strengthen the moisture transfer between the solution and the air and reduce the energy consumption, the invention introduces an electrostatic field into a dehumidification/regenerator and provides the solution dehumidification/regenerator based on electrostatic field interface strengthening.
In order to achieve the purpose, the invention adopts the following technical scheme:
a solution dehumidifier/regenerator based on electrostatic field interface enhancement comprises two shell channels and a power supply, wherein the two shell channels are arranged in parallel and used for the passage of a dehumidifying solution;
the shell channels are of a tetrahedral structure, the opposite surfaces between the two shell channels are all metal porous films, and the other three surfaces are organic glass; wherein, in each shell channel, a metal wire is embedded on the organic glass opposite to the metal porous film;
the two shell channels are connected through an upper baffle and a lower baffle which are arranged in parallel, and an air channel is formed between the upper baffle and the lower baffle;
the positive pole of the power supply is respectively connected with the metal porous films of the two shell channels, and the negative pole of the power supply is respectively connected with the metal wires of the two shell channels.
As the positive electrode and the negative electrode of the external power supply are respectively connected with the positive electrode metal porous film and the grounding electrode U-shaped metal wire, an electric field is formed between the positive electrode metal porous film and the grounding electrode metal wire, charged ions in the solution at the interface are attracted or repelled by the positive electrode metal wire, and the dipole orientation of water molecules tends to be directionally arranged.
The device of the invention changes the ion distribution in the interface layer and the surface tension of the solution by utilizing the attraction of the external electrostatic field at the interface to the ions in the salt solution and the directional arrangement of the water molecules, enhances the original migration tendency of the water molecules and strengthens the mass transfer effect. The device has the advantages of simple structure, high dehumidification/regeneration efficiency, extremely low required power of a power supply, low energy consumption and high system energy efficiency.
Further, the metal wire is a U-shaped metal wire.
Further, the dehumidifying solution is salt solution with hygroscopicity, organic solution or mixed solution composed of a plurality of solutions.
Further, the dehumidifying solution is a LiCl solution, a LiBr solution or a mixed solution of the LiCl solution and the LiBr solution.
Further, the surface of the metal thin film has an anticorrosive coating, which is considered to improve the problem of corrosion of the solution to the metal.
Further, the power supply is a low voltage power supply.
Furthermore, the metal porous film is of a porous structure and has wettability and conductivity, heat and mass exchange is carried out on the solution through the film and air, and the thickness of the liquid film is determined by the distance from the porous film to the wall surface of the organic glass.
The solution dehumidifier/regenerator provided by the invention adopts a falling film type design, and strengthens gas-liquid interface mass transfer by applying an electric field. Compared with the prior art, the method has the following beneficial effects:
1. the invention adopts the form of externally added high-voltage electrostatic field, the power consumption of an externally added power supply is extremely low, and higher regeneration efficiency can be obtained by consuming extremely low energy.
2. The invention enhances the mass transfer effect and enhances the original dehumidification and regeneration tendency through the attraction or the repulsion of the electrode to the ions and the influence on the orientation of the water molecules.
3. The anode metal film adopted by the invention can disturb the air, thereby promoting mass transfer.
Drawings
FIG. 1 is a schematic diagram of the construction of a solution dehumidifier/regenerator according to the present invention;
FIG. 2 is a schematic view of the solution path of the solution dehumidifier/regenerator of the present invention;
FIG. 3 is a schematic view of the air passages of the solution dehumidifier/regenerator of the present invention;
wherein: the device comprises a shell channel 1, an air channel 2, an upper baffle 3, a lower baffle 4, organic glass 5, a metal wire 6, a metal porous film 7 and a power supply 8.
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings, taking the cross flow form as an example. The scope of the invention as claimed is not limited thereto.
Example 1
As shown in fig. 1 to 3, the present invention provides a solution dehumidifier/regenerator based on electrostatic field interface enhancement, the device adopts a falling film form, and comprises two shell channels 1 arranged in parallel and a power supply 8. The shell channel is a solution channel and is used for the passing of a dehumidifying solution.
The shell channel 1 is of a tetrahedral structure, the opposite surface between the two shell channels is a metal porous film 7, the rest three surfaces are organic glass 5, and metal wires 6 are embedded on the outer side surface of the organic glass opposite to the metal porous film or in the organic glass. The metal wires 6 and the metal porous film 7 are distributed in mirror symmetry. The metal porous membrane serves as one wall surface of the solution channel and also as an electrode material at the interface of the solution and air.
The two shell passages are connected 4 through an upper baffle 3 and a lower baffle which are arranged in parallel, and an air passage 2 is formed between the upper baffle and the lower baffle.
The anode of the power supply 8 is connected with the metal porous films 7 of the two shell channels, and the cathode is connected with the metal wires 6 of the two shell channels. An electric field is formed between the metal porous film 7 and the metal wire 6, the charged ions of the solution at the interface are attracted or repelled by the metal wire, and the dipole orientation of the water molecules at the interface tends to be aligned.
The dehumidifying solution is salt solution with hygroscopicity, organic solution or mixed solution composed of multiple solutions, such as LiCl solution, LiBr solution and mixed solution of the above solutes in different proportions.
The shell channel 1 is a flat and narrow channel, the solution is easy to form a flat falling film due to large viscosity, the thickness of the liquid film is determined by the distance from the metal porous film 7 to the organic glass 5, and because the solution channels are arranged on two sides of the air channel, the contact area is large, and air can fully contact with the solution when entering the channel. The flow pattern of the solution and air may be cross flow, counter flow, co-current flow.
The metal porous film 7 is a porous structure, and has wettability and conductivity, such as copper foam, graphene metal foam, carbon nanotube film, and the like. Considering the problem of metal corrosion caused by the dehumidifying solution, an anti-corrosion coating, such as a conductive polyaniline/water-based epoxy resin anti-corrosion coating, a carbon nanotube conductive anti-corrosion coating, a robadu anti-corrosion coating and the like, should be added on the surface of the metal porous film.
The core of the invention lies in the application of electrostatic field, the anode of the power supply is connected with the metal porous film at the interface, the cathode of the power supply is connected with the U-shaped metal wire of the grounding electrode, the electrostatic field is generated between the anode metal wire and the grounding electrode metal wire, the anode metal porous film at the solution interface can influence the orientation of ions in the solution and water molecules in gas and liquid, thereby influencing the surface tension of the system and the migration effect of water molecules.
When the device is used, by taking cross flow as an example, if the device is a dehumidifier, a solution enters two solution channels from top to bottom, air flows into the air channels in a direction perpendicular to the direction of the solution, the original migration direction of water molecules enters the solution from the air, the air and the solution pass through the action of an electric field of the metal porous film at a gas-liquid interface, anions in the solution are closer to the surface, and the action of the anions in the water molecule absorption process is larger according to molecular dynamics simulation, so that the application of a positive electrode is beneficial to the solution dehumidification process, and meanwhile, the water molecules tend to be easier to enter a bulk phase due to the reduction of the surface tension of the solution caused by directional arrangement. If the device is a regenerator, solution and air still carry out heat and mass exchange in a cross flow direction, the air is limited in a flow channel by the upper baffle plate, the lower baffle plate and the two positive electrode metal porous films, the original water molecules enter the air from the solution in a migration direction, the surface tension is reduced, the water molecules are easier to break through the surface, and meanwhile, a large amount of gathered anions have a repulsive effect on electronegative water molecules and are more favorable for releasing the water molecules. In conclusion, the addition of the electric field can enlarge the original water molecule migration potential difference, thereby reducing the required dehumidification temperature and regeneration temperature and enhancing the dehumidification/regeneration effect of the solution. The device has the advantages of extremely low power of the required power supply, low energy consumption and improvement on the efficiency of the system.
It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. The technical solutions described in the claims should be regarded as the protection scope of the present invention, and equivalents including technical features described in the claims are intended to be included in the protection scope of the present invention.
Claims (8)
1. A solution dehumidifier/regenerator based on electrostatic field interface enhancement is characterized in that: the dehumidification device comprises two shell channels (1) and a power supply (8), wherein the shell channels (1) are arranged in parallel, and the dehumidification solution passes through the shell channels (1);
the shell channels (1) are of a tetrahedral structure, the opposite surfaces of the two shell channels are both metal porous films (7), and the other three surfaces are organic glass (5); wherein, a metal wire (6) is embedded on the organic glass opposite to the metal porous film (7) in each shell channel (1);
the two shell passages (1) are connected through an upper baffle (3) and a lower baffle (4) which are arranged in parallel, and an air passage (2) is formed between the upper baffle (3) and the lower baffle (4);
the positive pole of the power supply (8) is respectively connected with the metal porous films (7) of the two shell channels, and the negative pole of the power supply is respectively connected with the metal wires (6) of the two shell channels.
2. The solution dehumidifier/regenerator of claim 1, wherein: the metal wire (6) is a U-shaped metal wire.
3. The solution dehumidifier/regenerator of claim 1, wherein: the dehumidifying solution is salt solution with hygroscopicity, organic solution with hygroscopicity or mixed solution of the salt solution and the organic solution with hygroscopicity.
4. The solution dehumidifier/regenerator of claim 3, wherein: the dehumidifying solution is LiCl solution, LiBr solution or the mixed solution of the LiCl solution and the LiBr solution.
5. The solution dehumidifier/regenerator of claim 1, wherein: the surface of the metal porous film (7) is provided with an anti-corrosion coating.
6. The solution dehumidifier/regenerator of claim 1, wherein: the power supply (8) is a low-voltage power supply.
7. The solution dehumidifier/regenerator of claim 1, wherein: the metal porous film (7) is of a porous structure, has wettability and conductivity, and enables solution to be subjected to heat and mass exchange with air through the film.
8. The solution dehumidifier/regenerator of claim 1, wherein: the dehumidification solution and the air flowing in the air channel flow in a cross flow, a counter flow or a co-flow mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110742663.0A CN113587269A (en) | 2021-07-01 | 2021-07-01 | Solution dehumidification/regenerator based on electrostatic field interface enhancement |
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| CN202110742663.0A CN113587269A (en) | 2021-07-01 | 2021-07-01 | Solution dehumidification/regenerator based on electrostatic field interface enhancement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923230A (en) * | 2022-04-01 | 2022-08-19 | 东南大学 | Magnetic stimulation response ionic liquid dehumidification air conditioning system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018109472A (en) * | 2017-01-04 | 2018-07-12 | グエン チー カンパニー リミテッド | Air conditioner |
| CN112032865A (en) * | 2020-07-30 | 2020-12-04 | 东南大学 | Falling film type liquid humidity regulator and method based on high-voltage electrostatic field polarization effect |
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2021
- 2021-07-01 CN CN202110742663.0A patent/CN113587269A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018109472A (en) * | 2017-01-04 | 2018-07-12 | グエン チー カンパニー リミテッド | Air conditioner |
| CN112032865A (en) * | 2020-07-30 | 2020-12-04 | 东南大学 | Falling film type liquid humidity regulator and method based on high-voltage electrostatic field polarization effect |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923230A (en) * | 2022-04-01 | 2022-08-19 | 东南大学 | Magnetic stimulation response ionic liquid dehumidification air conditioning system |
| CN114923230B (en) * | 2022-04-01 | 2024-02-02 | 东南大学 | Magnetic stimulus response ionic liquid dehumidification air conditioning system |
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Application publication date: 20211102 |
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