KR100639013B1 - Water recycle tank and fuel cell system using the same - Google Patents

Abstract

Provided are a fuel cell system which condenses the gaseous water generated at an electricity generation part effectively with a hydrophilic material and discharges the remaining gas rapidly, thereby improving the efficiency of the system, and a water recovery device used in the system. The fuel cell system comprises a fuel container which stores fuel; a fuel mixing part which mixes the fuel and water to produce a mixture fuel; an air supply part which supplies oxygen; an electricity generation part which generate an electric energy by the electrochemical reaction of the mixture fuel and oxygen; and a water recovery device(150) which condenses the water discharged from the electricity generation part, stores the condensed water, and supplies it to the fuel mixing part. The water recovery device(150) comprises a housing(151); a condensing part(160) which has a hydrophilic inner surface; a partition wall(152) which forms one terminal side of the condensing part and has at least one aperture; and a gas discharge part(170) which has a hydrophobic inner surface.

Description

Water recovery device and fuel cell system employing the same {water recycle tank and fuel cell system using the same}

1 is a schematic diagram of a fuel cell system according to an embodiment of the present invention;

2 is a schematic diagram of a fuel cell system according to another embodiment of the present invention;

3 is a perspective view showing a water recovery device according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: fuel container 120: fuel mixing unit

130, 230: electricity generating unit 140: air supply unit

150: water recovery device 151: housing

152: bulkhead 160: condensation unit

170: gas discharge unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water recovery device and a fuel cell system employing the same, and more particularly, to a water recovery device for effectively condensing water generated in an electric generator of a fuel cell system and a fuel cell system employing the same.

In general, a fuel cell is a power generation system that converts chemical energy directly into electrical energy by an electrochemical reaction between hydrogen and oxygen. The hydrogen may supply pure hydrogen directly to the fuel cell system, or may supply hydrogen by reforming materials such as methanol, ethanol, natural gas, and the like. The oxygen may directly supply pure oxygen to the fuel cell system, or may supply oxygen included in normal air using an air pump or the like.

 The fuel cell is a polymer electrolyte type and direct methanol type fuel cell operating at room temperature or below 100 ° C, a phosphoric acid type fuel cell operating at around 150 to 200 ° C, a molten carbonate type fuel cell operating at a high temperature of 600 to 700 ° C, 1000 It is classified into the solid oxide fuel cell etc. which operate at high temperature more than degreeC. Each of these fuel cells is basically the same operating principle of generating electricity, but different fuel types, catalysts, electrolytes and the like used.

Among them, Polymer Electrolyte Membrane Fuel Cell (PEMFC) uses hydrogen generated by reforming materials such as methanol, ethanol, and natural gas, and has excellent output characteristics and lower operating temperature than other fuel cells. Quick start and response characteristics. Therefore, as a mobile power source such as a car, as well as a distributed power source such as a house or a public building, and a power source for a small mobile device such as a portable electronic device, there is a wide range of applications.

Basically, the polymer electrolyte fuel cell includes a fuel container for storing fuel, a reformer for reforming fuel to generate hydrogen, and an electricity generator for generating a predetermined voltage and current by an electrochemical reaction between hydrogen and oxygen. The electricity generating unit includes at least one unit fuel cell for generating electrical energy, and may have a stack structure in which a plurality of unit fuel cells are stacked.

The reformer not only converts the reformed gas rich in hydrogen necessary for the generation of electricity through the catalytic reaction such as steam reforming (SR) and water gas shift (WGS), but also reformed gas. It is included in the removal of carbon monoxide poisoning the catalyst of the fuel cell. Since the catalysis requires water, the reformer must be supplied with a mixture of fuel and water. Such water may be separately supplied from the outside, but the water generated after the electrochemical reaction may be recovered from the electricity generating unit.

On the other hand, another type of direct methanol fuel cell (DMFC), which operates at a low temperature, has a structure similar to that of the polymer electrolyte fuel cell described above, but in which liquid high concentration methanol is mixed with water instead of hydrogen as a fuel. Then directly used as fuel. Therefore, water is also required for the direct methanol fuel cell operation. Such water may be separately supplied from the outside, but the water generated by the electrochemical reaction may be recovered from the electricity generating unit and used.

As described above, when recovering water generated in the electricity generating unit, the gaseous water generated in the electricity generating unit is condensed and recovered. However, if this condensation does not occur effectively, the amount of water to be condensed is small, it is impossible to secure a sufficient amount of water required for the operation of the fuel cell system. The continuous operation of the fuel cell system is therefore impossible because the output of the fuel cell system must be reduced or the operation must be stopped.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and provides a water recovery device capable of condensing water generated in an electricity generating unit of a fuel cell system and a fuel cell system employing the same.

In order to achieve the above object, a fuel cell system according to the present invention includes a fuel container for storing raw material fuel, a fuel mixing part for mixing the raw material fuel and water to generate a mixed fuel, an air supply part for supplying oxygen, and the mixing And a water recovery unit configured to condense and store water discharged from the electricity generation unit and to supply water to the fuel mixing unit. The device is a condensation part of the housing, the inner surface is a hydrophilic material and is defined as a compartment inside the housing and is in fluid communication with the electricity generating part through a water recovery pipe, and one end of the condensation part is installed. A barrier rib formed with at least one opening and the inner surface thereof is a hydrophobic material and connected to the condensation unit through the opening. And it characterized in that it comprises a discharge pipe via an external fluid communication to be possible to connect the gas discharge portion.

A plurality of protrusions may be formed on a surface of the partition wall included in the inner surface of the condensation unit, and the protrusion may be formed at a position in contact with a substance of a gaseous phase introduced through the water recovery pipe, and the partition wall may have a curved shape. Can be. The opening of the partition wall may include a communication port installed at the top of the partition wall and a water level control port installed at the bottom. The sum of the cross-sectional area of the communication port may be smaller than the cross-sectional area of the opening of the water recovery pipe, and the communication port may not be located in line with the opening of the water recovery pipe. The cross-sectional area of the opening of the outlet can be greater than the sum of the cross-sectional areas of the communication port, and the communication port can be located in line with the opening of the outlet.

The fuel cell system is characterized in that the direct methanol fuel cell system.

In another embodiment, a fuel cell system according to the present invention includes a fuel container for storing raw fuel, a fuel mixing unit for mixing the raw fuel and water to generate a mixed fuel, and reforming the mixed fuel to generate hydrogen. A reformer, an air supply unit for supplying oxygen, an electricity generator for generating electrical energy by electrochemically reacting the hydrogen and the oxygen, and condensing and storing water discharged from the electricity generator and supplying water to the fuel mixing unit. It includes a water recovery device, wherein the water recovery device, the housing, the interior of the housing is limited to the compartment and is capable of fluid communication with the electricity generating unit through the water recovery pipe and the water supply pipe is installed at one end and the inner surface is A condensation part, which is a hydrophilic material, forms one end surface of the condensation part, and at least one opening is formed through the partition wall and the opening. Communication with the condensation section is connected via a discharge pipe to enable communication with the external fluid and is characterized in that the inner surface comprises a hydrophobic substance in exhaust gas.

The partition wall may have a curved shape, and a plurality of protrusions may be formed on a surface of the partition wall forming the inner surface of the condensation unit. The opening of the partition wall may include a communication port installed at the top of the partition wall and a water level control port installed at the bottom. The sum of the cross-sectional area of the communication port may be smaller than the cross-sectional area of the opening of the water recovery pipe, and the communication port may not be located in line with the opening of the water recovery pipe. The cross-sectional area of the opening of the outlet can be greater than the sum of the cross-sectional areas of the communication port, and the communication port can be located in line with the opening of the outlet.

The fuel cell system is characterized in that the polymer electrolyte fuel cell system.

In another embodiment, the water recovery device, the housing, is defined as a compartment inside the housing and is in fluid communication with the electricity generating portion through the water recovery pipe, the water supply pipe is installed at one end and the inner surface is a hydrophilic material Condensation unit, the one end of the condensation unit and the at least one opening is formed through the barrier ribs and the opening through which the communication with the condensation unit and the fluid communication is connected to the outside through the discharge pipe and the inner surface of the gas discharge portion is a hydrophobic material It is characterized by including.

A plurality of protrusions may be formed on a surface of the barrier rib forming the inner surface of the condensation part, and the protrusion may be formed at a position contacting a gaseous substance introduced through the water recovery pipe, and the barrier rib may have a curved shape. have. The opening of the partition wall may include a communication port installed at the top of the partition wall and a water level control port installed at the bottom. The sum of the cross-sectional area of the communication port may be smaller than the cross-sectional area of the opening of the water recovery pipe, and the communication port may not be located in line with the opening of the water recovery pipe. The cross-sectional area of the opening of the outlet can be greater than the sum of the cross-sectional areas of the communication port, and the communication port can be located in line with the opening of the outlet.

Hereinafter, preferred embodiments for clarifying the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings indicate the same or similar components.

1 is a schematic diagram of a fuel cell system according to an embodiment of the present invention.

In the fuel cell system according to an exemplary embodiment of the present invention of FIG. 1, the term "fuel" means normal methanol, and the term "fuel fuel" means a high concentration of methanol, and the term "mixed fuel" refers to a mixture of the fuel and water. Means.

Referring to FIG. 1, a fuel cell system according to an exemplary embodiment of the present invention includes a fuel container 110, a fuel mixing unit 120, an electricity generating unit 130, an air supply unit 140, and a water recovery device 150. It is composed.

The fuel cell system is a direct methanol fuel cell method, wherein the raw fuel stored in water and the fuel container 110 is supplied to the fuel mixing unit 120, and the fuel mixing unit 120 supplies the raw fuel and the water. The mixture generates the mixed fuel and supplies it to the electricity generator 130, and the electricity generator 130 generates electrical energy through an electrochemical reaction of oxygen supplied from the mixed fuel and the air supplier 140. .

The raw fuel stored in the fuel container 110 is supplied to the fuel mixing unit 120 through the raw material fuel supply pipe 121 connected in fluid communication with the fuel mixing unit 120. In addition, the water stored in the water recovery device 150 to be described later is supplied to the fuel mixing unit 120 through a water supply pipe 123 connected in fluid communication with the fuel mixing unit 120. The fuel mixing unit 120 generates the mixed fuel in which the raw fuel and the water are mixed, and the electricity generating unit 130 through the mixed fuel supply pipe 122 connected in fluid communication with the electricity generating unit 130. Supplied to.

The electricity generating unit 130 generates electric energy by performing an electrochemical reaction between the mixed fuel supplied from the fuel mixing unit 120 and oxygen supplied through the air supply unit 140. The electricity generating unit 130 is an at least one unit fuel cell for generating electrical energy, an electrode-electrolyte composite 134 for oxidizing / reducing the fuel and oxygen, and the electrode-electrolyte composite of the mixed fuel and oxygen. And a bipolar plate 135 for supplying to 134 and for discharging the product occurring in the electrode-electrolyte composite 134. The electrode-electrolyte composite 134 may have a structure of a conventional electrode-electrolyte composite having an electrolyte membrane 131 interposed between the anode electrode 132 and the cathode electrode 133 forming both sides. In addition, the electricity generating unit 130 may have a stack structure in which a plurality of unit fuel cells are stacked.

Through the above configuration, the mixed fuel is supplied to the anode electrode 132 through the bipolar plate 135 adjacent to the anode electrode 132. Oxygen is also supplied to the cathode electrode 133 through another bipolar plate 135 adjacent to the cathode electrode 133. In addition, the products generated at the anode electrode 132 and the cathode electrode 133 are discharged through the adjacent bipolar plate 135, respectively.

The electrochemical reaction of the electricity generating unit 130 is represented by the following reaction scheme 4.

The anode _{reaction: CH 3 0H + H 2 O} → CO 2 + 6H + + 6e -

The cathode ^{_{reaction: 3/2 O 2 + 6H + +}} 6e - → 3H 2 O

Total reaction: CH ₃ 0H + 3/2 O ₂ → CO ₂ + 3H ₂ O

Referring to the reaction scheme, the mixed fuel generates carbon dioxide, hydrogen ions and electrons at the anode electrode (132). The hydrogen ions generated at the anode electrode 132 pass through the electrolyte membrane 131 to move to the cathode electrode 133, and the hydrogen ions react with oxygen at the cathode electrode 133 to generate water. The electrons generated at the anode electrode 132 travel through an external circuit with a change in free energy of a chemical reaction.

On the other hand, the temperature of the water generated by the cathode electrode 133 of the electricity generating unit 130 is in the range of 40 ℃ to 100 ℃, it may be discharged in the liquid or gas phase. The water is supplied to the water recovery device 150 through the water recovery pipe 124 connected to the fluid generator 130 and the water recovery device 150 to enable fluid communication. The water recovery device 150 condenses and stores the introduced water, and supplies water to the fuel mixing unit 120 through a water supply pipe 123 connected to the fuel mixing unit 120 so as to be in fluid communication with the fuel mixing unit 120. Specific operation of the water recovery device 150 will be described later.

2 is a schematic diagram of a fuel cell system according to another embodiment of the present invention.

In the fuel cell system according to another embodiment of the present invention of Figure 2, the fuel may include a hydrocarbon-based material methanol, ethanol, natural gas, etc., in particular, the raw material fuel means a pure high concentration of fuel In addition, the mixed fuel means a mixture of the raw material fuel and water.

The fuel cell system is a polymer electrolyte fuel cell method, wherein the raw fuel stored in water and the fuel container 110 is supplied to the fuel mixing unit 120, the water and the raw fuel in the fuel mixing unit 120 The mixed fuel is supplied to the reformer 125, the hydrogen is reformed from the mixed fuel in the reformer 125 and supplied to the electricity generator 230, and the electricity of the hydrogen and oxygen in the electricity generator 23 Electrical reactions generate electrical energy.

The raw material fuel is stored in the fuel container 110, and the raw material fuel is supplied to the fuel mixing part 120 through a fuel supply pipe 121 connected in fluid communication with the fuel mixing part 120. In addition, the water stored in the water recovery device 150 is supplied to the fuel mixing unit 120 through a water supply pipe 123 connected in fluid communication with the fuel mixing unit 120. The fuel mixing unit 120 generates the mixed fuel in which the raw material fuel and the water are mixed, and the mixed fuel is reformer 125 through a mixed fuel supply pipe 122 connected in fluid communication with the reformer 125. Supplied to.

The reformer 125 reforms the mixed fuel through a steam reforming catalytic reaction to generate a reformed gas mainly composed of hydrogen, and performs a water gas shift catalytic reaction to reduce carbon monoxide contained in the reformed gas. Hydrogen with reduced carbon monoxide is supplied to the electricity generating unit 230 through the hydrogen fuel supply pipe 126 that is in fluid communication with the electricity generating unit 230. For example, when the fuel is methanol, the steam reforming reaction and the water gas shift catalytic reaction are represented by the reaction schemes 2 and 3, respectively.

Steam reforming catalytic reaction: CH ₃ OH (l) + H ₂ O (l) → C0 ₂ + 3H ₂ ΔH ₂₉₈ = 130.9KJ / mol

Water gas shift catalytic reaction: CO + H ₂ O → CO ₂ + H ₂ ΔH ₂₉₈ = -41.1 KJ / mol

The electricity generating unit 230 generates electrical energy by causing an electrochemical reaction between hydrogen reformed through the reformer 125 and oxygen contained in normal air introduced through the air supply unit 140. The electricity generating unit 230 supplies the electrode-electrolyte composite 234 for oxidizing / reducing hydrogen and oxygen, and the hydrogen-oxygen to the electrode-electrolyte composite 234 and in the electrode-electrolyte composite 234. It may include a bipolar plate 235 for discharging the generated product. The electrode-electrolyte composite 234 may have a structure of a conventional electrode-electrolyte composite having an electrolyte membrane 231 interposed between the anode electrode 232 and the cathode electrode 233 forming both sides. Representation of the electrochemical reaction of the electricity generating unit 230 is shown in Scheme 4.

The ^{_{anode: H 2 → 2H + + 2e}} -

^{_{Cathode: ½O 2 + 2H + + 2e}} - → H 2 O

Overall Reaction: H ₂ + ½O ₂ → H ₂ O + Current + Heat

Referring to the reaction scheme, the hydrogen is divided into hydrogen ions and electrons in the anode electrode 232, the hydrogen ions generated in the anode electrode 232 passes through the electrolyte membrane 231 to move to the cathode electrode 233 The hydrogen ions react with oxygen at the cathode electrode 233 to generate water. The electrons generated at the cathode electrode 233 move through an external circuit with a change in free energy of a chemical reaction.

On the other hand, the temperature of the water generated by the cathode electrode 233 of the electricity generating unit 230 is in the range of 40 ℃ to 100 ℃, it may be discharged in the liquid or gas phase. The water is supplied to the water recovery device 150 through a water recovery pipe 124 connected to the fluid generator 230 and the water recovery device 150 to enable fluid communication. The water recovery device 150 condenses and stores the introduced water, and supplies water to the fuel mixing unit 120 through a water supply pipe 123 connected to the fuel mixing unit 120 in fluid communication. Specific operation of the water recovery device 150 will be described later.

3 is a perspective view showing the water recovery device 150 according to an embodiment of the present invention.

Referring to FIG. 3, the water recovery device 150 according to the embodiment of the present invention includes a condensation unit 160 and a gas discharge unit 170 separated into the partition wall 152 in the housing 151.

The condensation unit 160 is defined as a compartment inside the housing 151. One end of the condensation unit 160 is provided with a water recovery pipe 124 connected to allow fluid communication, and a partition wall 152 is installed at a position facing the water recovery pipe 124. The water supply pipe 123 is connected to the lower portion of the condensation unit 160 to allow fluid communication. The inner surface of the condensation unit 160 is made of or coated with a hydrophilic material.

The partition wall 152 is a plate-shaped structure with a curved surface. At least one communication port 153 penetrating through the partition wall 152 is formed in the upper portion of the partition wall 152. The position of the communication port 153 is a position that is shifted from the opening of the water recovery pipe 124 without facing in a straight line, and the entire cross-sectional area of the communication port 153 may be smaller than the cross-sectional area of the opening of the water recovery pipe 124. A plurality of protrusions 154 are formed at one side 157 of the partition 152 facing the opening of the water recovery pipe 124. At least one water level controller 155 penetrating the partition wall 152 is formed in the lower portion of the partition wall 152.

The gas discharge unit 170 is defined as a compartment inside the housing 151. One side of the gas discharge unit 170 is limited to the partition wall 152, and a discharge port 156 connected to the fluid wall 152 to be in fluid communication is provided at a position facing the partition wall 152. The position of the outlet 156 is a position facing the communication port 153 of the partition 152 in a straight line, the cross-sectional area of the opening of the outlet 156 is larger than the overall cross-sectional area of the communication port 153 of the partition 152. Can be. The inner surface of the gas outlet 170 is made of a hydrophobic material or coated with a hydrophobic material.

Through the above configuration, the liquid or gaseous water is introduced into the condenser 160 through the water recovery pipe 124 at a predetermined pressure and speed together with the residual gas. Since the partition 152 has a curved surface, the gaseous water and residual gas introduced into the condensation unit 160 are uniformly dispersed in the water condensation unit 160 while minimizing flow resistance. On the other hand, since the overall cross-sectional area of the communication port 153 of the partition 152 is smaller than the cross-sectional area of the opening of the water recovery pipe 124, the openings of the communication hole 153 and the water recovery pipe 124 are not installed in a straight line with each other, The gaseous water and the residual gas flowing into the condenser 160 are accumulated in the condenser 160 for a predetermined time without being immediately discharged to the gas discharge unit 170 through the communication port 153. Therefore, the time for allowing the gaseous water to condense in contact with the inner surface of the condenser 160 may be sufficiently secured. The gaseous water introduced into the condenser 160 may be easily condensed on the inner surface of the condenser 160 due to the hydrophilic coating of the inner surface of the condenser 160 for a sufficient time as described above. Is accumulated in the lower portion of the condenser 160 due to its own weight. The condensation may be further facilitated by widening the contact surface due to the protrusion 154 on the surface of the partition wall 152. Meanwhile, the inside of the condenser 160 may maintain a predetermined pressure due to accumulated residual gas, and the water accumulated under the condenser 160 due to the pressure may be easily discharged through the water supply pipe 123.

On the other hand, if the amount of water condensed in the condenser 160 is excessively large, the condensation efficiency of the condenser 160 is reduced because the surface area of the condenser 160 that can be condensed by contacting the gaseous water is reduced. Can fall. Therefore, when the water condensed in the condensation unit 160 is above a predetermined level, the water is discharged to the discharge port 156 through the water level control unit 155 provided in the partition wall 152 to reduce the inner surface area of the condensation unit 160. It can be secured.

Residual gas introduced from the condenser 160 is introduced into the gas discharge unit 170 through the communication port 153 installed in the partition 152. The inside of the gas discharge unit 170 is covered with a hydrophobic material, the cross-sectional area of the opening of the outlet 156 is larger than the total cross-sectional area of the communication port 153 of the partition 152, the opening and the communication hole ( 153 is installed in a straight line with each other, the residual gas can be easily discharged through the outlet 156.

According to the fuel cell system employing the water recovery device according to the present invention, the gaseous water generated in the electricity generating unit 130 is effectively condensed by using the hydrophilic material on the surface of the condensing unit 160 and the residual gas is the inner surface By quickly discharging through the gas outlet 170 which is a hydrophobic material, sufficient water is secured and continuously supplied to the fuel cell system, thereby enabling the operation of the fuel cell system of high efficiency.

Claims (25)

A fuel container for storing raw fuel; A fuel mixing unit mixing the raw material fuel and water to generate a mixed fuel; An air supply unit for supplying oxygen; An electricity generator for generating electrical energy by electrochemically reacting the mixed fuel and the oxygen; And It includes a water recovery device to condense and store the water discharged from the electricity generating unit to supply to the fuel mixing unit, The water recovery device, housing; A condensation unit having a hydrophilic material inside and limited to a compartment inside the housing and connected to the electricity generation unit through a water collection pipe so as to be in fluid communication with one end of the water supply pipe; A partition wall forming one end surface of the condensation unit and having at least one opening formed therein; And And a gas discharge portion having an inner surface of the hydrophobic material and communicating with the condensation portion through the opening and in fluid communication with the outside through the discharge port. The method of claim 1, A fuel cell system, characterized in that a plurality of projections are formed on the surface of the partition wall included in the inner surface of the condensation unit. The method of claim 2, The protrusion is formed in a position in contact with the material of the gas phase flowing through the water recovery pipe. The method of claim 3, The partition wall is a fuel cell system, characterized in that the curved shape. The method of claim 4, wherein The opening of the partition wall is a fuel cell system, characterized in that it comprises a communication port provided on the top of the partition wall and the water level control port provided at the bottom. The method of claim 5, And the sum of the cross-sectional areas of the openings is smaller than the cross-sectional area of the openings of the water recovery pipe. The method of claim 6, The communication port is not located in line with the opening of the water recovery pipe. The method of claim 5, And the cross-sectional area of the opening of the outlet is greater than the sum of the cross-sectional areas of the communication ports. The method of claim 8, And the communication port is located in line with the opening of the discharge port. The method according to any one of claims 1 to 9, The fuel cell system is a fuel cell system, characterized in that the direct methanol fuel cell system. A fuel container for storing raw fuel; A fuel mixing unit mixing the raw material fuel and water to generate a mixed fuel; A reformer for reforming hydrogen from the mixed fuel to produce hydrogen; An air supply unit for supplying oxygen; An electricity generator for generating electrical energy by electrochemically reacting the hydrogen and the oxygen; And And a water recovery device for condensing and storing water discharged from the electricity generation unit and supplying water to the fuel mixing unit. The water recovery device, housing; A condensation unit defined as a compartment inside the housing and in fluid communication with the electricity generating unit through a water recovery pipe, and having a water supply pipe installed at one end thereof, and having an inner surface of the hydrophilic material; A partition wall forming one end surface of the condensation unit and having at least one opening formed therein; And And a gas discharge portion communicating with the condensation portion through the opening and in fluid communication with the outside through the discharge opening, and having an inner surface of the gas discharge portion. The method of claim 11, A fuel cell system, characterized in that a plurality of projections are formed on the surface of the partition wall included in the inner surface of the condensation unit. The method of claim 12, The protrusion is formed in a position in contact with the material of the gas phase flowing through the water recovery pipe. The method of claim 13, The partition wall is a fuel cell system, characterized in that the curved shape. The method of claim 14, The opening of the partition wall is a fuel cell system, characterized in that it comprises a communication port provided on the top of the partition wall and the water level control port provided at the bottom. The method according to any one of claims 11 to 15, The fuel cell system is a fuel cell system, characterized in that the polymer electrolyte fuel cell system. housing; A condensation unit defined as a compartment inside the housing and in fluid communication with the electricity generating unit through a water recovery pipe, and having a water supply pipe installed at one end thereof, and having an inner surface of the hydrophilic material; A partition wall forming one end surface of the condensation unit and having at least one opening formed therein; And And a gas discharge portion communicating with the condensation portion through the opening and in fluid communication with the outside through the discharge opening, and having a gas discharge portion whose inner surface is a hydrophobic material. The method of claim 17, And a plurality of protrusions are formed on a surface of the partition wall included in the inner surface of the condensation unit. The method of claim 18, And the protrusion is formed at a position in contact with the substance of the gas phase flowing through the water recovery pipe. The method of claim 19, The partition wall is a water recovery device, characterized in that the curved shape. The method of claim 20, The opening of the partition wall water recovery device characterized in that it comprises a communication port installed on the upper end of the partition wall and the water level control device installed on the bottom. The method of claim 21, And the sum of the cross-sectional areas of the communication ports is smaller than the cross-sectional area of the opening of the water collecting pipe. The method of claim 22, And the communication port is not located in line with the opening of the water collecting pipe. The method of claim 21, And the cross-sectional area of the opening of the outlet is greater than the sum of the cross-sectional areas of the communication port. The method of claim 24, The communication port is water collection device, characterized in that located in line with the opening of the outlet.

Images