KR101297930B1 - Hybrid power generation system using salinity gradient of sea water and fresh water - Google Patents

Abstract

The present invention relates to a hybrid power generation system for recovering the salinity difference energy between seawater and freshwater, wherein the seawater and the freshwater are respectively introduced into a space divided by a semipermeable membrane, and the seawater by the salinity difference between the seawater and the freshwater. Some of the fresh water is mixed in to form a mixed solution, the osmotic portion for generating an osmotic pressure; A pressure recovery unit configured to convert at least one of the fresh water and the sea water by converting the pumped energy into osmotic energy using the osmotic pressure generated in the osmosis unit; A power generation unit including at least one anion exchange membrane and a cation exchange membrane, respectively, wherein the seawater and the fresh water are supplied between the anion exchange membrane and the cation exchange membrane from the pressure recovery unit to generate power by ion migration; And a connection part connecting the seawater and the freshwater to move through at least one of the osmosis part, the pressure recovery part, and the power generation part.
According to the present invention, by combining the reverse electrodialysis (RED) and pressure delayed osmosis (PRO) to generate power, it is possible to significantly increase the energy efficiency, minimize the loss energy, power from the salinity difference energy between seawater and freshwater There is an advantage to maximize the power generation efficiency to produce.

Description

Hybrid power generation system recovering salinity difference energy between seawater and freshwater {HYBRID POWER GENERATION SYSTEM USING SALINITY GRADIENT OF SEA WATER AND FRESH WATER}

The present invention relates to a hybrid power generation system for recovering salinity difference energy between seawater and freshwater, and more specifically, unlike conventional, reverse electrodialysis (RED) and pressure delayed osmosis (Pressure Retarded Osmosis, PRO). By combining power generation), the efficiency of recovering salinity difference energy in the form of electric energy in the mixing process of seawater and fresh water can be remarkably increased, and it is possible to maximize the power production efficiency by using the salinity difference energy between seawater and freshwater in a simple process. The present invention relates to a hybrid power generation system for recovering salinity difference energy between seawater and freshwater.

In recent years, indiscriminate fossil energy has been used due to industrialization. As a result, the concentration of greenhouse gases is gradually increased while the amount of fossil fuel is gradually decreasing. In particular, increasing the concentration of greenhouse gases caused rises in temperature and sea level, resulting in abnormal climate events.

In this regard, scientific successes in the IPCC Fourth Report have been published in the IPCC Fourth Report, which proves that there is a high likelihood of global disasters if the greenhouse gas reduction is not successful. With the Bali Roadmap, the greenhouse gas problem is recognized as a global challenge.

Therefore, efficient use and saving of energy have some effects as a primary countermeasure, but the energy combustion part, which accounts for 84% of GHG emissions, must be reduced, which is a sustainable and carbon-free new source for future energy. It is time to research and develop and commercialize energy.

At present, the renewable energy that is in the spotlight includes energy using solar light, wind power, and hydropower (hydropower), and the current direction of development of renewable energy is concentrated on them. Such major renewable energy has problems such as high initial investment cost, output instability, and ecosystem disturbance.

On the other hand, the generation method of recovering the salinity difference between seawater and freshwater as energy, in addition to the advantages of renewable energy, can secure a stable output without disturbing the ecosystem, and utilizes the sea area in connection with the estuary weir and embankment. There is an advantage that can reduce the initial installation cost, the recent research has been conducted mainly in Europe.

As shown in FIG. 1, the energy solubilization operation is to recover solar energy input to fresh water as evaporation of seawater, and to recover free energy corresponding to an increase in entropy by mixing in terms of thermodynamics. I can understand.

The energy recovery technology using the difference in seawater and freshwater concentration can be classified into the osmotic method and the electrolyte (NaCl) dialysis method first proposed by Professor Sidney Loeb of Israel in 1975. Each study is underway at the Dutch Center for Sustainable Hydro Technology (Wetsus).

From this, energy recovery techniques using various concentrations of seawater and freshwater have been studied. However, each technology has a large number of complex devices, which are economically inefficient, or require additional energy to supply hydraulic pressure. There was a low problem.

Accordingly, there has been a demand for the development of an energy recovery technology that can increase power generation efficiency by minimizing the amount of additionally supplied energy while simplifying the energy recovery system and significantly reducing the construction cost.

The present invention is to solve the above problems, the power generation by combining the reverse electrodialysis (RED) and pressure delayed osmosis (PRO), the power generation to recover the salinity difference energy in the form of electrical energy in the mixing process of seawater and fresh water It is an object of the present invention to provide a hybrid power generation system that recovers salinity difference energy between seawater and freshwater, which can significantly increase efficiency.

In addition, since there is no need to supply additional hydraulic pressures of seawater and freshwater, or additional power generation equipment such as a turbine, an economical salinity difference between seawater and freshwater, which not only simplifies the process but also reduces the cost of building an energy recovery system. An object of the present invention is to provide a hybrid power generation system for recovering energy.

In addition, by supplying the pumping energy through the osmotic pressure recovery by the pressure delay osmosis method, and by developing the reverse electrodialysis method, by minimizing the energy loss, the seawater-freshwater that can maximize the power production efficiency from the salinity difference energy between seawater and freshwater An object of the present invention is to provide a hybrid power generation system that recovers salinity difference energy of liver.

A hybrid power generation system for recovering salinity difference energy between seawater and freshwater according to the present invention for achieving the above object, in a hybrid power generation system for recovering salinity difference energy between seawater and freshwater, the salinity between the seawater and the freshwater An osmotic portion for generating an osmotic pressure using a difference; A power generation unit generating power by using ion movement between the sea water and the fresh water; A pressure recovery unit for converting the osmotic pressure into positive energy for supplying at least one of the seawater or the freshwater to the osmosis unit or the power generation unit; And a connection part connecting the seawater and the fresh water to move through at least one of the osmosis part, the power generation part, or the pressure recovery part.

The osmotic part is a container including a semipermeable membrane, wherein the seawater and the freshwater are respectively introduced into a space divided by the semipermeable membrane, and a portion of the freshwater is added to the seawater by the concentration difference between the seawater and the freshwater. Is mixed to form a mixed solution, characterized in that to generate an osmotic pressure.

In addition, the osmotic pressure is characterized in that to move the fresh water to the power generation unit, the mixed solution to the pressure recovery unit, the power generation unit is characterized in that the reverse electrodialysis battery.

The reverse electrodialysis battery includes at least one anion exchange membrane and a cation exchange membrane, respectively, wherein the seawater and the fresh water are supplied between the anion exchange membrane and the cation exchange membrane, and are configured to generate power by ion migration.

In the reverse electrodialysis battery, the anion exchange membrane and the cation exchange membrane are alternately arranged, and the seawater and the fresh water are alternately supplied between the anion exchange membrane and the cation exchange membrane. The battery is characterized in that at least two electrodes are located on both outermost sides of the anion exchange membrane and the cation exchange membrane.

The pressure recovery unit may further include a first pressure recovery unit configured to supply the seawater to at least one of the osmosis unit and the power generation unit; And a second pressure recovery part for supplying the fresh water to at least one of the osmosis part and the power generation part, wherein the pressure recovery part uses the osmotic pressure generated in the osmosis part, wherein the sea water or the Characterized in that the injection pressure for supplying at least one of the fresh water to at least one of the osmosis unit or the power generation unit is characterized in that for increasing 110% to 1500%.

The connection portion, the seawater pipe is connected so that the seawater can be supplied to at least one of the osmosis portion or the power generation portion through the pressure recovery portion; A fresh water pipe connected to the fresh water so as to be supplied through the pressure recovery part, the osmosis part, and the power generation part in order; And a mixed solution pipe connected to the mixed solution to move from the osmosis part to the pressure recovery part and to be discharged to the outside of the pressure recovery part.

According to the hybrid power generation system for recovering salinity difference energy between seawater and freshwater of the present invention, by combining the reverse electrodialysis (RED) and pressure delayed osmosis (PRO) power generation, the salvage difference energy recovery efficiency can be significantly increased. There is an advantage.

In addition, the conventional seawater and fresh water do not need an additional hydraulic pressure or an additional power generation device such as a turbine, which not only simplifies the process but also reduces the cost of building an energy recovery system. .

In addition, by supplying the pumping energy through the osmotic pressure recovery by the pressure delay osmosis method, and by developing the reverse electrodialysis method, there is an advantage that can maximize the power production efficiency from the salinity difference energy between seawater and freshwater by minimizing the loss energy. .

1 is a schematic diagram showing the recovery principle of free energy according to the mixing of sea water and fresh water
Figure 2 is a schematic diagram showing the principle of osmotic pressure caused by the difference in concentration.
Figure 3 is a cross-sectional view showing a device for generating power using the pressure delay osmosis method
Figure 4 is a schematic diagram showing the operation principle of the cation exchange membrane and anion exchange membrane in the reverse electrodialysis battery of the present invention
Figure 5 is a cross-sectional view showing a reverse electrodialysis battery of the present invention
6 is a cross-sectional view showing a hybrid power generation system for recovering salinity difference energy between seawater and freshwater of the present invention.
7 is a flowchart sequentially showing a hybrid power generation method for recovering salinity difference energy between seawater and freshwater of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings for a hybrid power generation system for recovering salinity difference energy between seawater and freshwater according to the present invention. The present invention may be better understood by the following examples, which are for the purpose of illustrating the present invention and are not intended to limit the scope of protection defined by the appended claims.

First, a hybrid power generation method for recovering salinity difference energy between seawater and freshwater is as shown in FIGS. 2 to 6.

In a first embodiment of a hybrid power generation method for recovering salinity difference energy between seawater and freshwater of the present invention, an osmotic pressure is generated using the salinity difference between the seawater and the freshwater, and the osmotic pressure is at least one of the seawater or the freshwater. Osmotic pressure generation step used to supply positive energy of the; And an ion mobile power generation step of generating power using ion movement between the sea water and the fresh water. This is to maximize the generation efficiency from the salinity difference energy between seawater and freshwater by complementing the disadvantages of reverse electrodialysis and osmosis.

The osmotic pressure generating step is preferably to generate the osmotic pressure by the pressure-retarded osmosis (Pressure-Retarded Osmosis) method, the pressure delayed osmosis method, by using the osmotic pressure generated by the concentration difference between the seawater and the fresh water. It is characterized by generating positive energy.

The pressure delay osmosis system is characterized in that to generate a positive energy using the osmotic pressure generated by the difference in concentration between the seawater and the fresh water. By using the osmotic pressure principle shown in Figure 2, the water molecules move from the freshwater side to the seawater side with the semi-permeable membrane boundary, and the pressure on the seawater side increases, so that osmotic pressure due to the concentration difference between seawater and freshwater is generated.

Using this principle, as shown in Figure 3, by combining the pressure delay osmosis method of hydraulic mechanical recovery from the seawater-freshwater osmotic pressure with the reverse electrodialysis salt of the present invention, the pressure delay osmosis phenomenon directly Instead of using for power generation, by utilizing the osmotic pressure due to the concentration difference as a positive energy, it is possible to maximize the energy efficiency.

When the pressure delay osmosis method is used for direct power generation, there is a need for a hydrophobic power generation device for generating power and mechanical energy loss problems. Therefore, it is not used for direct power generation. Complementing with the pressure delay osmosis method, the hybrid power generation method can be used to significantly increase the power production efficiency.

That is, by using the pressure generated by the pressure delay osmosis method using the difference between the concentration of sea water and fresh water, sea water and fresh water is supplied for the reverse electrodialysis. As a result, there is an advantage that the energy efficiency can be improved compared to the conventional method of consuming most of the salinity difference energy recovered from the reverse electrodialysis battery for pumping operation.

In addition, the ion mobile power generation step, it is preferable to generate a reverse electrodialysis (Reverse ElectroDialysis) method, the pumped energy used in the reverse electrodialysis method is characterized in that it is supplied to the pressure generated by the pressure delay osmosis method It is done.

In the reverse electrodialysis, at least one anion exchange membrane and a cation exchange membrane are disposed, and the seawater and the fresh water are supplied between the anion exchange membrane and the cation exchange membrane to generate electricity.

That is, seawater and fresh water are respectively introduced between the anion exchange membrane and the cation exchange membrane shown in FIG. EMF is generated.

In the reverse electrodialysis battery used in the reverse electrodialysis method, as shown in FIG. 5, it is preferable that a plurality of anion exchange membranes and a cation exchange membrane are alternately arranged to form a stack to obtain a high voltage output.

Next, a second embodiment of the hybrid power generation method for recovering the salinity difference energy between seawater and freshwater of the present invention in more detail, as shown in Figure 7, the input step (S10), osmosis step (S20), It comprises a moving step (S30), power generation step (S40) and pressure recovery step (S50). It runs in a continuous process, can be done almost simultaneously, and corresponds to a repeating process.

Here, in the input step (S10), the seawater is separated into the first seawater and the second seawater, the first seawater and the fresh water is introduced into the osmotic module, the second seawater is introduced into the reverse electrodialysis battery to be. This is a process in which seawater is separately introduced into an osmotic module and a reverse electrodialysis battery for osmotic generation and power production.

In the input step (S10), the sea water and the fresh water is preferably introduced into the osmotic module and the reverse electrodialysis battery at a pressure of 0.1atm to 15atm, more preferably 1atm to 11atm, most preferably 2atm It is effective to be injected into. Here, the displayed pressure is the gauge pressure measured by the gauge.

If the gauge pressure is less than 0.1atm, the flow rate of seawater and freshwater is too low, and sufficient seawater and freshwater are not supplied for power generation in reverse electrodialysis batteries, resulting in a reduction in power generation efficiency. There is a problem that the degree of energy efficiency improvement is significantly reduced. On the contrary, when the pressure exceeds 15 atm, the high pressure causes not only the durability of the power generation system to be lowered, but also the installation cost is increased, and the excessively high speed causes waste of seawater and fresh water, and power production efficiency is also lowered. there is a problem.

In addition, in the input step (S10), the osmosis module is separated inside the boundary with a semi-permeable membrane therein, it is preferable to supply the first sea water and the fresh water to each separate space. This is because the semi-permeable membrane enables the movement of only water molecules, thereby moving the water molecules from fresh water to the first sea water due to the concentration difference between the first sea water and fresh water, thereby forming an osmotic pressure.

Next, the osmotic step (S20) is a step in which a part of the fresh water is moved to the first seawater to generate a mixed solution by the concentration difference in the osmotic pressure module, and osmotic pressure is generated. This is an osmotic process due to the difference in concentration between seawater and freshwater.

In the osmotic step (S20), due to the difference in concentration between the first seawater and the freshwater, a part of the freshwater is characterized by moving toward the first seawater at the boundary of the semipermeable membrane of the osmotic module.

The mixed solution is produced by mixing fresh water and first seawater, and has a lower salinity than seawater.

In addition, the moving step (S30) is the fresh water moves to the reverse electrodialysis battery, by the osmotic pressure, the mixed solution is a step of moving to a pressure recovery device.

Freshwater in the moving step (S30) refers to the remaining fresh water except the freshwater moved to the first seawater by the difference in concentration, the pressure of the mixed solution in the osmotic step (S20) passes through the pressure recovery device to the freshwater The pressure can be transmitted to be supplied to the reverse dialysis battery. The pressure recover means a mechanism configured to recycle pressure.

In addition, in the moving step (S30), the fresh water and the mixed solution is preferably moved to the reverse electrodialysis battery and the pressure recoverer at a pressure of 0.1atm to 15atm, more preferably 1atm to 11atm, most preferably Preferably at 2 atm. Here, the pressure means the gauge pressure as described above.

If the gauge pressure is less than 0.1 atm, the flow rate of fresh water is too low, and sufficient fresh water is not supplied for power generation in reverse electrodialysis cells, resulting in a decrease in power generation efficiency, and energy efficiency improvement through pressure recovery of the mixed solution. There is a problem that the degree is significantly lower. On the contrary, when the pressure exceeds 15 atm, not only the durability of the power generation system is lowered due to the high pressure, but also the installation cost is increased, and rather, the fresh water is wasted due to excessively high speed, thereby degrading power production efficiency.

Next, in the power generation step (S40), the reverse electrodialysis battery is a step of generating power by reverse electrodialysis using the second seawater and the fresh water. This is a process in which power is produced through reverse electrodialysis batteries.

In the power generation step (S40), the reverse electrodialysis method, by alternately arranging an anion exchange membrane and a cation exchange membrane, the second sea water and the fresh water alternately supply between the anion exchange membrane and the cation exchange membrane to generate power to be.

It is preferable that a plurality of the anion exchange membrane and the cation exchange membrane are installed alternately so as to form a stack, so that the second seawater and fresh water are alternately introduced between the alternating anion exchange membrane and the cation exchange membrane. In addition, the second seawater and the fresh water are selectively ion-transferred through the exchange membrane, thereby producing power through an electrode provided on the outermost side of the anion exchange membrane and the cation exchange membrane.

Finally, the pressure recovery step (S50) is a step of recovering the pressure of the mixed solution by the pressure recovery device, to increase the input pressure of sea water and fresh water in the input step. This is a process of recovering the pressure generated by the osmotic phenomenon, which is a feature of the present invention, and supplying seawater and fresh water to the system, that is, supplying positive energy.

In the pressure recovery step (S50), using the pressure of the mixed solution, it is preferable to increase the input pressure of the seawater and fresh water in the input step (S10) 110% to 1500%, more preferably 200% to 1200 Increasing% is effective. If it is less than 110%, it is difficult to supply enough seawater and fresh water to the system, and if it exceeds 1500%, it is difficult to increase the pressure by osmotic pressure.

Here, the pressure is based on the absolute pressure.

The hybrid power generation method for recovering salinity difference energy between seawater and freshwater of the present invention can be circulated, and according to the circulating principle, each step may be performed irrespective of the order, and each step is connected and progressed simultaneously in a continuous process. It is more desirable to produce power.

Next, the hybrid power generation system for recovering salinity difference energy between seawater and freshwater of the present invention, as shown in Figure 6, the osmosis unit 10, the power generation unit 20, the pressure recovery unit 30 and the connecting portion 40 ) The power generation system of the present invention is as described in the hybrid power generation method for recovering salinity difference energy between seawater and freshwater except as described below.

First, the osmosis unit 10 generates osmotic pressure by using the salinity difference between the seawater and the freshwater, which is preferably a container including a semipermeable membrane. It is preferable to position the semipermeable membrane so that the inside of the container is divided into two spaces, and the semipermeable membrane is effectively configured to allow the water molecules to move to one side. This is an apparatus for generating osmotic pressure due to the difference in concentration between seawater and freshwater.

The osmosis unit 10 is two spaces separated by the semi-permeable membrane, and the sea water 1 and the fresh water 2 are respectively injected into the sea water 1 by concentration difference. A portion is mixed to form the mixed solution 3 and generates an osmotic pressure.

Here, the osmotic pressure serves to move the fresh water (2) to the power generation unit 20, and to move the mixed solution (3) to the pressure recovery unit (40).

Next, the power generation unit 20 generates power by using ion movement between the sea water and the fresh water, which is preferably a reverse electrodialysis battery.

The reverse electrodialysis battery 20 includes at least one anion exchange membrane and a cation exchange membrane, respectively, wherein the seawater and the fresh water are supplied between the anion exchange membrane and the cation exchange membrane, and are preferably configured to generate electricity by ion migration. More preferably, the anion exchange membrane and the cation exchange membrane are alternately arranged, and the seawater and the fresh water are alternately supplied between the anion exchange membrane and the cation exchange membrane, so that it is effective to generate electricity by selective ion migration.

In addition, the reverse electrodialysis battery 20 is most preferable to obtain a high voltage output to form a stack by alternately arranging a plurality of anion exchange membrane and a cation exchange membrane.

In addition, in the reverse electrodialysis battery 20, at least two electrodes are preferably located at both outermost sides of the alternating anion exchange membrane and the cation exchange membrane, through which power is produced. In other words, the anode is on the left, the cathode is on the right, the anode is on the right, and the cathode is on the left. One embodiment of a specific reverse electrodialysis battery 20 is as shown in FIG.

Next, the pressure recovery unit 30 recovers the pressure generated in the osmosis unit 10 to collect at least one of the seawater 1 or the fresh water 2 from the osmosis unit 10 or the power generation unit 20. It serves to convert the positive energy for supplying at least one of the. This may be any of the pressure recovery apparatus generally used.

The pressure recovery unit 30 osmotic the first pressure recovery unit 31 and the fresh water 2 to supply the seawater 1 to at least one of the osmosis unit 10 or the power generation unit 20. It is preferably composed of a second pressure recovery portion 32 for supplying at least one of the portion 10 or the power generating portion 20. As shown in FIG. 6, the pressure recovery part for supplying the seawater 1 and the pressure recovery part for supplying the fresh water 2 are separated, and the sea water 1 and the fresh water 2 are separated through different piping. Since it is supplied, it is preferable to separate the pressure recovery part 30 also.

In addition, the pressure recovery unit 30, by using the pressure generated in the osmosis unit 10, at least one of the osmosis unit 10 or the power generation unit 20 of the sea water (1) and fresh water (2). It is preferable to increase the injection pressure to one to 110% to 1500%, and more preferably to increase 200% to 1200%. Details thereof are as described above.

Finally, the connection portion 40, at least one of the osmosis portion 10, the power generation portion 20 or the pressure recovery portion 30 to connect at least one of the sea water and the fresh water to move. Do it. That is, as shown in Figure 6, the connecting portion 40 is preferably composed of a pipe, such a pipe connects the osmosis portion 10, the power generation portion 20 and the pressure recovery portion 30 to each other, respectively It is configured to supply and discharge seawater (1), fresh water (2) and the mixed solution (3).

In addition, the connection portion 40 is preferably composed of a sea water pipe 41, a fresh water pipe 43 and a mixed solution pipe 42.

The seawater pipe 41 is connected so that the sea water 1 can be supplied to at least one of the osmosis unit 10 or the power generation unit 20 through the pressure recovery unit 30, the fresh water pipe 43 is connected so that the fresh water 2 may be supplied through the pressure recovery part 30, the osmosis part 10, and the power generation part 20 in order.

In addition, the mixed solution pipe 42 is connected so that the mixed solution 3 moves from the osmosis part 10 to the pressure recovery part 30 and is discharged to the outside of the pressure recovery device 30.

Thus, the connection portion 40 in the present invention serves to connect the seawater and fresh water to be smoothly supplied and discharged between the components of the system.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

1: Seawater
2: freshwater
3: Mixed solution
10: osmosis part (osmosis module)
20: power generation unit (reverse electrodialysis battery)
30: pressure recovery part
31: first pressure recovery portion
32: second pressure recovery portion
40: connection part (piping)
41: seawater piping
42: Mixed solution piping
43: freshwater piping

Claims (11)

In a hybrid power generation system for recovering salinity difference energy between seawater and freshwater,
The seawater and the freshwater are respectively introduced into a space divided into a semi-permeable membrane, and part of the freshwater is mixed with the seawater by the salinity difference between the seawater and the freshwater to form a mixed solution, and an osmotic portion generating osmotic pressure. ;
A pressure recovery unit configured to convert at least one of the fresh water and the sea water by converting the pumped energy into osmotic energy using the osmotic pressure generated in the osmosis unit;
A power generation unit including at least one anion exchange membrane and a cation exchange membrane, respectively, wherein the seawater and the fresh water are supplied between the anion exchange membrane and the cation exchange membrane from the pressure recovery unit to generate power by ion migration; And
Hybrid to recover the salinity difference energy between seawater and freshwater, characterized in that it comprises a; connecting through the osmosis unit, the power generation unit or the pressure recovery unit to connect the sea water and the fresh water to move. Power generation system
The method of claim 1,
The osmosis unit is a hybrid power generation system for recovering salinity difference energy between seawater and freshwater, characterized in that the container containing a semi-permeable membrane
delete The method of claim 1,
The osmotic pressure is a hybrid power generation system for recovering salinity difference energy between seawater and freshwater, characterized in that for moving the fresh water to the power generation unit, the mixed solution to the pressure recovery unit.
The method of claim 1,
The power generation unit, a hybrid power generation system for recovering salinity difference energy between seawater and freshwater, characterized in that the reverse electrodialysis battery
delete 6. The method of claim 5,
In the reverse electrodialysis battery, the anion exchange membrane and the cation exchange membrane are alternately arranged, and the salinity difference energy between seawater and freshwater, wherein the seawater and the fresh water are alternately supplied between the anion exchange membrane and the cation exchange membrane. Hybrid power generation system
The method according to claim 5 or 7,
In the reverse electrodialysis battery, a hybrid power generation system for recovering salinity difference energy between seawater and freshwater, wherein at least two electrodes are located at both outermost sides of the anion exchange membrane and the cation exchange membrane.
The method of claim 1,
The pressure recovery unit may include a first pressure recovery unit for supplying the seawater to at least one of the osmosis unit and the power generation unit; And a second pressure recovery unit for supplying the fresh water to at least one of the osmosis unit and the power generation unit. 2. A hybrid power generation system for recovering salinity difference energy between seawater and freshwater.
The method of claim 1,
The pressure recovery unit, by using the osmotic pressure generated in the osmosis unit, to increase the input pressure for supplying at least one of the sea water or the fresh water to at least one of the osmosis unit or the power generation unit 110% to 1500% Hybrid power generation system to recover salinity difference energy between seawater and freshwater
The method of claim 1,
The connection portion, the seawater pipe is connected so that the seawater can be supplied to at least one of the osmosis portion or the power generation portion through the pressure recovery portion;
A fresh water pipe connected to the fresh water so as to be supplied through the pressure recovery part, the osmosis part, and the power generation part in order; And
A hybrid power generation system for recovering salinity difference energy between seawater and freshwater, wherein the mixed solution moves from the osmosis part to the pressure recovery part and is connected to the mixed solution pipe to be discharged to the outside of the pressure recovery part.

Images