CN114702090A - Photovoltaic photo-thermal humidification and dehumidification system based on supergravity packed bed and working method thereof - Google Patents
Photovoltaic photo-thermal humidification and dehumidification system based on supergravity packed bed and working method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007791 dehumidification Methods 0.000 title claims abstract description 18
- 239000013535 sea water Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003860 storage Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 5
- 239000013505 freshwater Substances 0.000 claims description 49
- 238000012546 transfer Methods 0.000 claims description 12
- 238000012856 packing Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 238000010612 desalination reaction Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract 3
- 239000012159 carrier gas Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower or fuel cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
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Abstract
The invention discloses a photovoltaic photo-thermal humidifying and dehumidifying system based on a supergravity packed bed and a working method thereof, and belongs to the field of energy conservation, desalination and water production. The system comprises a humidification and dehumidification subsystem and a solar photovoltaic photo-thermal sub-module; the humidifying and dehumidifying subsystem comprises a humidifier, a dehumidifier, a fan, a water pump and a heat regenerator which are formed by a supergravity rotating packed bed; the solar photovoltaic power generation sub-module comprises a photovoltaic photo-thermal component and a storage battery; the invention combines the supergravity rotating packed bed with the solar photovoltaic power generation technology, utilizes the solar panel to generate power, supplies power for system electric equipment such as a water pump and a fan, and simultaneously uses cold seawater to recover heat generated by the solar panel for driving a humidifying and dehumidifying system, thereby simultaneously realizing the requirements of power generation and desalination for water production. The system has remarkable energy-saving effect and meets the strategic goals of national energy conservation and emission reduction and sustainable water resource development.
Description
Technical Field
The invention designs a photovoltaic photo-thermal humidifying and dehumidifying system based on a supergravity packed bed and a working method thereof, and belongs to the field of energy conservation, desalination and water production.
Background
Fresh water resources have become a scarce resource due to a series of problems such as rapid growth of population base, rapid development of industrial activities, and nonuniformity of spatial and temporal distribution of water resources. However, compared with fresh water, seawater accounts for more than 96% of the total amount of earth water resources, and if fresh water can be produced by processing seawater, the problem of water resource shortage can be greatly alleviated, so that the seawater desalination technology is brought forward. The conventional seawater desalination technology comprises multiple-effect evaporation, multi-stage flash evaporation, membrane distillation and the like, but the conventional seawater desalination technology usually needs high energy consumption and high operation and maintenance cost, and is not suitable for poor, remote and arid areas.
The humidification and dehumidification seawater desalination technology is based on the heat and mass co-transmission principle, simulates the circulation process of water evaporation and condensation rainfall in nature, and is suitable for small-scale seawater desalination due to high energy utilization efficiency. The typical humidification and dehumidification system mainly comprises a humidification tower, a dehumidification tower and a heater. When the system is operated, carrier gas (mostly air) is used as a carrier, the carrier gas firstly enters the humidifying tower and generates heat and mass transfer with hot seawater sprayed from a nozzle in a filling area, and simultaneously flows out from the top of the humidifying tower after absorbing sensible heat of the seawater and latent heat of water vapor generated by evaporation of the seawater and achieving the purpose of temperature rise and humidification, and concentrated seawater is accumulated at the bottom of the humidifying tower; then, the carrier gas enters the dehumidification tower, condenses and releases heat to the cooling fluid (seawater or fresh water) in the pipe along the heat exchange pipe, the fresh water generated in the condensation period is accumulated at the bottom of the tower, and the carrier gas subjected to the temperature reduction and dehumidification process is directly discharged into the atmosphere or reenters the humidification tower (open or closed cycle).
The high-gravity rotating packed bed is a high-efficiency separation device which utilizes a rotor rotating at a high speed to drive internal packing to rotate synchronously to form a high-gravity field and infinitely cut gas and liquid passing through the packing to ensure that the surface of the gas and liquid is continuously updated. Due to the fact that the super-gravity action strengthens the micro mixing between phases, the volume of the super-gravity rotating packed bed can be reduced by more than 10 times compared with that of traditional heat and mass transfer equipment such as a packed tower, the height of a mass transfer unit is reduced by 1-2 orders of magnitude, and the volume heat transfer coefficient is improved by 1-3 orders of magnitude. Therefore, the supergravity rotating packed bed can reduce the site limitation of equipment while enhancing the heat and mass transfer performance, and is a novel high-efficiency heat and mass transfer device.
Disclosure of Invention
The invention aims to provide a photovoltaic photo-thermal humidifying and dehumidifying system based on a supergravity packed bed and a working method thereof.
The utility model provides a photovoltaic light and heat humidification dehumidification system based on hypergravity packed bed, includes humidification dehumidification subsystem and solar photovoltaic photo-thermal submodule, its characterized in that:
the humidifying and dehumidifying subsystem comprises a humidifier, a dehumidifier, a dehumidifying fan, a humidifying fan, a fresh water pump, a sea water pump, a heat regenerator, a humidifier motor and a dehumidifier motor;
the inlet of the seawater pump of the humidification and dehumidification subsystem is communicated with external cold seawater, and the outlet of the seawater pump is connected with the seawater side inlet of the heat regenerator; the inlet of the humidifying fan is connected with the air side outlet of the dehumidifier, the outlet of the humidifying fan is connected with the air side inlet of the humidifier, the air side outlet of the humidifier is connected with the inlet of the dehumidifying fan, and the outlet of the dehumidifying fan is connected with the air side inlet of the dehumidifier; the fresh water side inlet of the dehumidifier is connected with the fresh water side outlet of the heat regenerator, the fresh water side outlet of the dehumidifier is connected with the inlet of the fresh water pump, and the outlet of the fresh water pump is connected with the fresh water side inlet of the heat regenerator;
the humidifier and the dehumidifier are super-gravity rotating packed beds, and rotating shafts of the humidifier and the dehumidifier are respectively connected with a humidifier motor and a dehumidifier motor.
The solar photovoltaic and photo-thermal sub-module comprises a photovoltaic and photo-thermal component and a storage battery;
the seawater end inlet of the photovoltaic photo-thermal component of the solar photovoltaic photo-thermal sub-module is connected with the seawater side outlet of the heat regenerator, the seawater end outlet of the photovoltaic photo-thermal component is connected with the seawater side inlet of the humidifier, and the storage battery is connected with the electric energy end outlet of the photovoltaic photo-thermal component.
A working method of a photovoltaic photo-thermal humidification and dehumidification system based on a supergravity packed bed is characterized by comprising the following working processes:
the external cold seawater is pumped into the heat regenerator by the seawater firstly, the fresh water waste heat of the fresh water side outlet of the dehumidifier sent by the fresh water pump is recovered and then enters the photovoltaic photo-thermal assembly, the heat generated by the solar panel in the photovoltaic photo-thermal assembly due to the photoelectric effect is absorbed, the heat value of the photovoltaic photo-thermal assembly is improved while the photovoltaic photo-thermal assembly is cooled, and therefore the cold seawater is used as hot seawater and enters the humidifier from the top; the low-temperature and low-humidity air at the air side outlet of the dehumidifier is sent into the humidifier from the bottom by the humidifying fan, and is subjected to a countercurrent heat and mass transfer process with hot seawater in the humidifier in the packing area, the air leaves from the air side outlet of the humidifier after being heated and humidified and is sent into the dehumidifier from the bottom by the dehumidifying fan, and the cold fresh water after releasing heat in the heat regenerator is changed into low-temperature and low-humidity air after undergoing the countercurrent heat and mass transfer process in the packing area, and then the air is prepared to enter the humidifier from the bottom again to complete an air circulation process; the seawater in the humidifier is discharged from the bottom of the humidifier after releasing heat, the fresh water in the dehumidifier flows out from the bottom of the dehumidifier after absorbing heat, one part of the fresh water is pumped into the heat regenerator by the fresh water pump to complete the fresh water circulation process, and the other part of the fresh water is led to the outside by a pipeline, so that the system produced water is obtained;
after the solar cell panel in the photovoltaic photo-thermal assembly absorbs the solar energy converged by the parabolic condenser, the solar energy is converted into electric energy in the photovoltaic photo-thermal assembly in a photoelectric conversion process, and the electric energy is stored in the storage battery; the electricity generated by the storage battery provides electric energy required by operation for system electric equipment such as a sea water pump, a fresh water pump humidifying fan, a dehumidifying fan, a humidifier motor, a dehumidifier motor and the like;
the rotors in the humidifier and the dehumidifier are respectively connected with a humidifier motor and a dehumidifier motor, and when the motors operate at a high speed, the humidifier and the dehumidifier are driven to synchronously rotate.
Drawings
FIG. 1 is a flow chart of a photovoltaic photo-thermal humidification and dehumidification system based on a supergravity packed bed, which is provided by the invention;
number designation in the figures: 1-a photovoltaic photo-thermal module; 2, a humidifier; 3-a dehumidifier; 4-a dehumidifying fan; 5-a humidifying fan; 6-a fresh water pump; 7-sea water pump; 8-a heat regenerator; 9-a humidifier motor; 10-a dehumidifier motor; 11-storage battery.
Detailed description of the invention
Fig. 1 is a flow chart of a photovoltaic photo-thermal humidification and dehumidification system based on a supergravity packed bed, and the working process of the system is described with reference to fig. 1:
the external cold seawater is pumped into the heat regenerator by the seawater firstly, the fresh water waste heat of the fresh water side outlet of the dehumidifier sent by the fresh water pump is recovered and then enters the photovoltaic photo-thermal assembly, the heat generated by the solar panel in the photovoltaic photo-thermal assembly due to the photoelectric effect is absorbed, the heat value of the photovoltaic photo-thermal assembly is improved while the photovoltaic photo-thermal assembly is cooled, and therefore the cold seawater is used as hot seawater and enters the humidifier from the top; the low-temperature and low-humidity air at the air side outlet of the dehumidifier is sent into the humidifier from the bottom by the humidifying fan, and is subjected to a countercurrent heat and mass transfer process with hot seawater in the humidifier in the packing area, the air leaves from the air side outlet of the humidifier after being heated and humidified and is sent into the dehumidifier from the bottom by the dehumidifying fan, and the cold fresh water after releasing heat in the heat regenerator is changed into low-temperature and low-humidity air after undergoing the countercurrent heat and mass transfer process in the packing area, and then the air is prepared to enter the humidifier from the bottom again to complete an air circulation process; the seawater in the humidifier is discharged from the bottom of the humidifier after releasing heat, the fresh water in the dehumidifier flows out from the bottom of the dehumidifier after absorbing heat, one part of the fresh water is pumped into the heat regenerator by the fresh water pump to complete the fresh water circulation process, and the other part of the fresh water is led to the outside by a pipeline, so that the system produced water is obtained;
after the solar cell panel in the photovoltaic photo-thermal assembly absorbs the solar energy converged by the parabolic condenser, the solar energy is converted into electric energy in the photovoltaic photo-thermal assembly in a photoelectric conversion process, and the electric energy is stored in the storage battery; the electricity generated by the storage battery provides electric energy required by operation for system electric equipment such as a sea water pump, a fresh water pump humidifying fan, a dehumidifying fan, a humidifier motor, a dehumidifier motor and the like;
the rotors in the humidifier and the dehumidifier are respectively connected with a humidifier motor and a dehumidifier motor, and when the motors operate at a high speed, the humidifier and the dehumidifier are driven to synchronously rotate.
Claims (2)
1. The utility model provides a photovoltaic light and heat humidification dehumidification system based on hypergravity packed bed, includes humidification dehumidification subsystem and solar photovoltaic photo-thermal submodule, its characterized in that:
the humidifying and dehumidifying subsystem comprises a humidifier (2), a dehumidifier (3), a dehumidifying fan (4), a humidifying fan (5), a fresh water pump (6), a sea water pump (7), a heat regenerator (8), a humidifier motor (9) and a dehumidifier motor (10);
the inlet of a sea water pump (7) of the humidification and dehumidification subsystem is communicated with the outside cold sea water, and the outlet of the sea water pump (7) is connected with the sea water side inlet of a heat regenerator (8); an inlet of the humidifying fan (5) is connected with an air side outlet of the dehumidifier (3), an outlet of the humidifying fan (5) is connected with an air side inlet of the humidifier (2), an air side outlet of the humidifier (2) is connected with an inlet of the dehumidifying fan (4), and an outlet of the dehumidifying fan (4) is connected with an air side inlet of the dehumidifier (3); a fresh water side inlet of the dehumidifier (3) is connected with a fresh water side outlet of the heat regenerator (8), a fresh water side outlet of the dehumidifier (3) is connected with an inlet of the fresh water pump (6), and an outlet of the fresh water pump (6) is connected with a fresh water side inlet of the heat regenerator (8);
the humidifier (2) and the dehumidifier (3) are super-gravity rotating packed beds, and rotating shafts of the super-gravity rotating packed beds are respectively connected with a humidifier motor (9) and a dehumidifier motor (10);
the solar photovoltaic and photo-thermal sub-module comprises a photovoltaic and photo-thermal component (1) and a storage battery (11);
the seawater end inlet of the photovoltaic photo-thermal component (1) of the solar photovoltaic photo-thermal sub-module is connected with the seawater side outlet of the heat regenerator (8), the seawater end outlet of the photovoltaic photo-thermal component (1) is connected with the seawater side inlet of the humidifier (2), and the storage battery (11) is connected with the electric energy end outlet of the photovoltaic photo-thermal component (1).
2. The working method of the supergravity packed bed-based photovoltaic photo-thermal humidification and dehumidification system as claimed in claim 1, is characterized by comprising the following working processes:
the external cold seawater is firstly sent to a heat regenerator (8) by a seawater pump (7), the fresh water waste heat of a fresh water side outlet of a dehumidifier (3) sent by a fresh water pump (6) is recovered and then enters a photovoltaic photo-thermal assembly (1), the heat generated by a solar panel in the photovoltaic photo-thermal assembly (1) due to the photoelectric effect is absorbed, the self heat value is improved while the photovoltaic photo-thermal assembly (1) is cooled, and the cold seawater is used as hot seawater and enters the humidifier (2) from the top; the low-temperature and low-humidity air at the air side outlet of the dehumidifier (3) is sent into the humidifier (2) from the bottom by a humidifying fan (5), and is subjected to a countercurrent heat and mass transfer process with hot seawater in a packing area, the air leaves from the air side outlet of the humidifier (2) after being heated and humidified, is sent into the dehumidifier (3) from the bottom by a dehumidifying fan (4), and is changed into low-temperature and low-humidity air after being subjected to a countercurrent heat and mass transfer process with cold fresh water which releases heat in a heat regenerator (8) in the packing area, and then is ready to enter the humidifier (2) from the bottom again to finish an air circulation process; the seawater in the humidifier (2) is discharged from the bottom of the humidifier (2) after releasing heat, the fresh water in the dehumidifier (3) flows out from the bottom of the dehumidifier (3) after absorbing heat, one part of the fresh water is sent to the heat regenerator (8) by the fresh water pump (6) to complete the fresh water circulation process, and the other part of the fresh water is led to the outside by a pipeline, so that the system produced water is obtained;
after the solar cell panel in the photovoltaic photo-thermal assembly (1) absorbs the solar energy converged by the parabolic condenser, the solar energy is converted into electric energy in the photoelectric conversion process in the photovoltaic photo-thermal assembly, and the electric energy is stored in the storage battery (11); the electricity generated by the storage battery (11) provides electric energy required by operation for the system electric equipment;
rotors in the humidifier (2) and the dehumidifier (3) are respectively connected with a humidifier motor (9) and a dehumidifier motor (10), and when the motors operate at high speed, the humidifier (2) and the dehumidifier (3) are driven to rotate synchronously.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974208A (en) * | 2022-12-07 | 2023-04-18 | 南京航空航天大学 | Seawater desalination system and method based on solar thermal collector and fuel cell |
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- 2022-04-29 CN CN202210464276.XA patent/CN114702090A/en active Pending
Patent Citations (5)
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| CN101013003A (en) * | 2007-01-30 | 2007-08-08 | 浙江理工大学 | Hypergravity mass transfer apparatus |
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Non-Patent Citations (1)
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| 罗先进等编著, 合肥：合肥工业大学出版社 * |
Cited By (1)
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|---|---|---|---|---|
| CN115974208A (en) * | 2022-12-07 | 2023-04-18 | 南京航空航天大学 | Seawater desalination system and method based on solar thermal collector and fuel cell |
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