KR102186188B1 - Hollow Fiber Membrane Humidifier Module - Google Patents

Abstract

The present invention relates to a hollow fiber membrane humidification module capable of maintaining a constant humidification performance even with a change in flow rate of inlet air.
The hollow fiber membrane humidification module according to the present invention includes a housing having an inlet and an outlet, a bundle of hollow fiber membranes inserted into the housing, a partition portion that supports the bundle of hollow fiber membranes and divides the inlet and outlet spaces, and a hollow fiber membrane bundle. And a potting portion for potting both ends of the housing to the housing, and the partition portion is adapted to change the size of the inflow space and the outflow space by moving according to the flow rate of the humidifying fluid introduced through the inlet.
According to the hollow fiber membrane humidification module according to the present invention, by changing the contact area between the fluid and the hollow fiber membrane while variably moving the partition according to the flow rate of the inflow fluid, the humidification performance is actively controlled according to the flow rate of the incoming air, It has the effect that it can be applied to a fuel cell system of various capacities by making it possible to maintain a constant humidification performance even with a change in flow rate.

Description

Hollow Fiber Membrane Humidifier Module

The present invention relates to a hollow fiber membrane humidification module, and more particularly, to a hollow fiber membrane humidification module capable of maintaining a constant humidification performance even with a change in flow rate of inlet air.

A fuel cell is a power generation type cell that generates electricity by combining hydrogen and oxygen. Unlike general chemical cells such as dry cells and storage cells, fuel cells have the advantage of being able to continuously produce electricity as long as hydrogen and oxygen are supplied, and that their efficiency is twice as high as that of an internal combustion engine because there is no heat loss. In addition, since chemical energy generated by the combination of hydrogen and oxygen is directly converted into electrical energy, emission of pollutants is low. Therefore, the fuel cell is not only environmentally friendly, but also has the advantage of reducing the worry of resource depletion due to an increase in energy consumption. Depending on the type of electrolyte used, these fuel cells are largely a polymer electrolyte type fuel cell (PEMFC), a phosphoric acid type fuel cell (PAFC), a molten carbonate type fuel cell (MCFC), and a solid oxide type fuel cell ( SOFC), and alkaline fuel cells (AFC). Each of these fuel cells basically operates on the same principle, but differs in the type of fuel used, operating temperature, catalyst, electrolyte, etc. Among them, the polymer electrolyte fuel cell is known to be the most promising not only for small-scale stationary power generation equipment but also for transportation systems because it operates at a lower temperature than other fuel cells and can be miniaturized due to its high power density.

One of the most important factors in improving the performance of a polymer electrolyte fuel cell is supplying a certain amount of moisture to the polymer electrolyte membrane (Polymer Eletrolyte Membrane or Proton Exchange Membrane: PEM) of the membrane-electrode assembly (MEA). By doing this, the moisture content is maintained. This is because, when the polymer electrolyte membrane is dried, the power generation efficiency rapidly decreases. As a method of humidifying the polymer electrolyte membrane, 1) a bubbler humidification method in which water is filled in an internal pressure vessel and then the target gas is passed through a diffuser to supply moisture, and 2) the amount of water supplied for the fuel cell reaction is determined. There are a direct injection method in which moisture is directly supplied to a gas flow pipe through a solenoid valve by calculation, and a humidification membrane method in which moisture is supplied to a fluidized bed of a gas using a polymer membrane. Among these, the humidification membrane method of humidifying the polymer electrolyte membrane by providing water vapor to the gas supplied to the polymer electrolyte membrane using a membrane that selectively transmits only water vapor contained in the exhaust gas is advantageous in that the humidifier can be made lighter and smaller.

The selective permeable membrane used in the humidification membrane method is preferably a hollow fiber membrane having a large permeable area per unit volume when forming a module. In other words, when manufacturing a humidifier using a hollow fiber membrane, high integration of the hollow fiber membrane with a wide contact surface area is possible, so that the fuel cell can be sufficiently humidified even with a small capacity, and low-cost materials can be used, and the fuel cell discharges at high temperatures. It has the advantage that it can be reused through a humidifier by recovering moisture and heat contained in the unreacted gas.

The conventional hollow fiber membrane humidification module was used by classifying products according to the capacity of the system. For example, the products were classified into a 1kW system -1kW humidifying module and a 10kW system -10kW humidifying module. For this reason, a humidification module was developed according to the capacity of the system. However, as the usage capacity of the fuel cell system has been diversified, a humidifying module capable of covering a wide range of capacities with one humidifying module has been required.

Korean Patent Publication No. 2011-0109814 (Publication date: 2011.10.06.) Korean Patent Publication No. 2013-0034404 (Publication date: 2013.04.05.)

The present invention has been devised in accordance with such a need, and an object of the present invention is to actively control the internal structure according to the flow rate of the incoming fluid, so that a constant humidification performance can be maintained even when the flow rate of the incoming fluid changes, so that a fuel cell system of various capacities It is to provide a hollow fiber membrane humidification module applicable to

In the hollow fiber membrane humidification module according to the present invention, an inlet is formed at one end through which the humidifying fluid of high temperature and humidity flows in, and an outlet is formed at the other end through which the humidifying fluid that has humidified the inside is exited, and At least one hollow fiber membrane bundle to be inserted, while supporting the bundle of hollow fiber membranes, divide the inflow space where the humidifying fluid flowing into the housing through the inlet stays temporarily and the outflow space where the humidification fluid temporarily stays before flowing out through the outlet And a potting part for potting both ends of the hollow fiber membrane bundle to the housing, and the partition part changes the size of the inlet space and the outlet space by moving according to the flow rate of the humidifying fluid flowing through the inlet. do.

Depending on the flow rate of the humidifying fluid, the size of the inlet space is equal to or larger than the size of the outlet space. It is preferable that the ratio of the length of the inlet space in the longitudinal direction of the housing to the length in the length of the housing in the outlet space is varied from 5:5 to 9:1.

The compartment is moved along the guide rail according to the flow rate of the humidifying fluid. It is preferable that the partition portion moves according to the flow rate of the humidifying fluid and is restored according to the elastic force of the spring. The compartment may be moved by a transfer mechanism controlled according to the flow rate of the humidifying fluid. The transfer mechanism transfers the division part under the control of a control motor that drives the transfer shaft. The conveying mechanism may be adapted to convey the division part by controlling the roll to which the conveying wire is wound and unwound.

The hollow fiber membrane bundle is one. There may be a plurality of hollow fiber membrane bundles. It is preferable that the hollow fiber membrane bundle contains 30 to 60% by volume of the hollow fiber membrane with respect to the total volume. The hollow fiber membrane bundle may have a circular, oval, or polygonal cross-sectional shape.

The housing may have a circular, elliptical or polygonal cross-sectional shape.

According to the hollow fiber membrane humidification module according to the present invention, the partition part is variably moved according to the flow rate of the inflow fluid, and the contact area between the fluid and the hollow fiber membrane is changed, and the position of the partition part is actively controlled according to the flow rate of the flowing fluid. It has an effect that it can be applied to fuel cell systems of various capacities by allowing constant humidification performance to be maintained even with changes in fluid flow rate.

1A and 1B are partially exploded perspective views of a hollow fiber membrane humidification module according to a first embodiment of the present invention.
2A is a cross-sectional view (a vertical cross-sectional view) taken along line AA in FIG. 1A.
2B is a cross-sectional view (longitudinal cross-sectional view) taken along the line A'-A' in FIG. 1B.
3 is a cross-sectional view (vertical cross-sectional view) showing a hollow fiber membrane humidification module according to a second embodiment of the present invention.
4 is a cross-sectional view (vertical cross-sectional view) showing a hollow fiber membrane humidification module according to a third embodiment of the present invention.
5 is a cross-sectional view (vertical cross-sectional view) showing a hollow fiber membrane humidification module according to a fourth embodiment of the present invention.
6 is a cross-sectional view (vertical cross-sectional view) showing a hollow fiber membrane humidification module according to a fifth embodiment of the present invention.
7 is a cross-sectional view (vertical cross-sectional view) showing a hollow fiber membrane humidification module according to a sixth embodiment of the present invention.
8 is a longitudinal sectional view of a conventional hollow fiber membrane humidification module.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

1A and 1B are partially exploded perspective views of a hollow fiber membrane humidification module 100 according to a first embodiment of the present invention. 1A shows a hollow fiber membrane humidification module in which one hollow fiber membrane bundle 120 is disposed, and FIG. 1B shows a hollow fiber membrane humidification module in which a plurality of hollow fiber membrane bundles 120 are arranged. As shown, the hollow fiber membrane humidifier module 100 according to the first embodiment includes a housing 110, a hollow fiber membrane bundle 120, a partition 130, a potting part 140, 140', Includes covers 150 and 150'.

The housing 110 and the covers 150 and 150 ′ form the shape of the humidifier module 100 and may be made of hard plastic or metal such as polycarbonate. In addition, the housing 110 and the covers 150 and 150 ′ may have a cross-sectional shape in a width direction as shown in FIGS. 1A and 1B, or may be circular as shown in FIG. 7. The square may be a square, a square, a trapezoid, a parallelogram, a pentagon, a hexagon, and the like, and the square may have a rounded corner. Also, the circle may be an ellipse.

One end of the housing 110 is formed with an inlet 111 through which the humidifying fluid of high temperature and high humidity is introduced, and the other end of the housing 110 is formed with an outlet 112 through which the humidifying fluid that has humidified the inside exits. The covers 150 and 150 ′ are respectively assembled at both ends of the housing 110.

Each of the inlet 111 and the outlet 112 formed in the housing 110 may be disposed parallel to one side of the housing 110, but may be disposed in a diagonal direction of the housing 110.

FIG. 2A is a cross-sectional view taken along the line A-A in FIG. 1A, and FIG. 2B is a cross-sectional view taken along the line A'-A' in FIG. 1B.

One or more hollow fiber membrane bundles 120 are inserted into the housing 110 along the longitudinal direction and are arranged and installed while being supported by the partition unit 130 according to the capacity of the humidification module 100. The hollow fiber membrane 121 of the hollow fiber membrane bundle 120 selectively passes moisture. The material of the hollow fiber membrane 121 is well known and a detailed description thereof will be omitted herein. The hollow fiber membrane bundle 120 preferably contains 30 to 60% by volume of the hollow fiber membrane 121 with respect to the total volume. In addition, the hollow fiber membrane bundle 120 may be formed surrounded by a mesh net. The hollow fiber membrane bundle 120 may have a circular, oval, or polygonal cross-sectional shape.

The partition unit 130 is provided inside the housing 110 to support and partition at least one or more hollow fiber membrane bundles 120. In each insertion space of the partition unit 130, a bundle of hollow fiber membranes 160 is inserted, supported, and disposed. In addition, the partition unit 130 is an inlet space (S1) in which the humidifying fluid flowing into the housing 110 through the inlet 111 temporarily stays and an outflow in which the humidifying fluid temporarily stays before flowing out through the outlet 112 The space S2 is divided into both sides.

The partition unit 130 is moved according to the flow rate of the humidifying fluid introduced through the inlet 111 to change the size of the inlet space S1 and the outlet space S2. According to the flow rate of the humidifying fluid, the size of the inflow space S1 is equal to or larger than the size of the outflow space S2. Accordingly, the ratio of the length L1 of the inlet space S1 in the housing length direction and the length L2 in the length direction of the housing of the outlet space S2 is changed from 5:5 to 9:1. That is, the basic position of the partition unit 120 is a length ratio of 5:5, and may be changed to a position of 6:4, 7:3, 8:2, and 9:1 according to a change in flow rate at this basic position.

The wall thickness of the partition 130 may be formed differently for each material, and the thinner the thickness, the better the efficiency. In general, the wall thickness of the partition may be 0.1mm to 70 mm, in the case of a plastic material, 0.1mm to 70 mm is more preferable, and in the case of a metal material, 0.2 mm to 50 mm may be more preferable. If the wall thickness is out of the range, it is difficult to withstand the pressure during operation because the thickness is too thin, and if it is thicker, a space for the humidifying fluid to stay is not sufficiently secured.

The flow rate of the inflow humidification fluid is determined according to the capacity of the fuel cell system. In the case of the same humidification module, the humidification performance decreases as the flow rate of the humidification fluid increases. In such a humidifier module 100 of the present invention, the contact area between the humidifying fluid and the hollow fiber membrane 120 is changed while the partition 130 is variably moved according to the use flow rate of the introduced humidifying fluid. Accordingly, by actively controlling the humidification performance, it is possible to maintain a constant humidification performance even when the flow rate of the inlet air changes.

Therefore, the configuration in which the partition unit 130 can variably move like the humidifier module of the present invention can maintain constant humidification performance in a fuel cell system of various capacities, and thus can be applied to systems of various capacities with efficient humidification performance. Is done.

The potting part 140, 140' binds the hollow fiber membranes 121 of the hollow fiber membrane bundle 120 at the end of the hollow fiber membrane bundle 120 (the side of the fluid passage), while closing the voids between the hollow fiber membranes 121 While filling, the housing 110 is sealed by contacting the inner surfaces of both ends of the housing 110. The material of the potting parts 140 and 140 ′ is well known, and detailed descriptions thereof will be omitted herein.

The potting parts 140 and 140 ′ are formed inside each of the both ends of the housing 110, so that both ends of the hollow fiber membrane bundle 120 are fixed to the housing 110. Accordingly, both ends of the housing 110 are blocked by the potting portions 140 and 140 ′, and a flow path through which the humidifying fluid passes is formed therein. In the present invention, a plurality of hollow fiber membrane bundles 120 are ported to the housing 110 at once.

The covers 150 and 150 ′ are coupled to both ends of the housing 110. At one side of the covers 150 and 150 ′, fluid entrances 151 and 151 ′ through which the fluid to be humidified enters and exits are formed. The pair of fluid entrances 151 and 151' may all be arranged in the same direction, and are in the same direction as the inlet 111 and the outlet 112 formed in the housing 110 as shown in FIGS. 1A and 1B. Can be placed. If the components in which the fluid flows in and out are arranged in the same direction as described above, when the hollow fiber membrane module 100 is disposed in the fuel cell system, it is easy to miniaturize the fuel cell system due to a spatial advantage. The humidified fluid flowing into the fluid inlet 151 of one cover 150 is humidified while passing through the inner conduit of the hollow fiber membrane 121 of the hollow fiber membrane bundle 120, and the fluid inlet 151 of the other cover 150'').

3 is a cross-sectional view (longitudinal cross-sectional view) showing a hollow fiber membrane humidification module 200 according to a second embodiment of the present invention, in which the partition 130 moves according to the flow rate of the humidifying fluid, while the elastic force of the spring 260 It is supposed to be restored accordingly. The spring 260 is installed in the outlet space (S2), and a plurality of springs 260 are installed in the space between the hollow fiber membrane bundles 120. One end of the spring 260 is fixed to the partition unit 130 and the other end of the spring 260 is fixed to the potting unit 140'. The spring 260 is guided by being inserted into the guide rod 261. The remaining configuration of the hollow fiber membrane humidification module 200 according to the second embodiment is the same as or similar to the first embodiment, so a detailed description thereof will be omitted.

4 is a cross-sectional view (longitudinal cross-sectional view) showing a hollow fiber membrane humidification module 300 according to a third embodiment of the present invention, in which the partition unit 330 moves along the guide rail 360 according to the flow rate of the humidifying fluid. have. The guide rail 360 is installed in the outlet space S2 and is provided on the inner surface of the housing 110 along the longitudinal direction. A stopper 361 is provided at one end (middle of the housing) of the guide rail 360 so as not to deviate from the basic position (length ratio 5:5) of the partition unit 330 toward the inflow space. A sliding groove is formed in the partition 330 so as to be inserted into the guide rail 360 and slide. The remaining configuration of the hollow fiber membrane humidification module 300 according to the third embodiment is the same as or similar to that of the first embodiment, and thus a detailed description thereof will be omitted.

5 is a cross-sectional view (longitudinal cross-sectional view) showing a hollow fiber membrane humidification module 400 according to a fourth embodiment of the present invention, in which the partition unit 130 is moved by a transfer mechanism 460 controlled according to the flow rate of the humidifying fluid The transfer mechanism 460 is configured to transfer the partition unit 130 under the control of the control motor 462 that drives the transfer shaft 461. The transfer mechanism 460 is provided with a guide bar (not shown), and an end portion of the transfer shaft 461 is rotatably connected to the partition unit 130. The control motor 462 is controlled by sensing the flow rate of the humidification fluid flowing into the inflow space S1. The remaining configuration of the hollow fiber membrane humidification module 400 according to the fourth embodiment is the same as or similar to the first embodiment, so a detailed description thereof will be omitted.

6 is a cross-sectional view (longitudinal cross-sectional view) showing a hollow fiber membrane humidification module 500 according to a fifth embodiment of the present invention, in which the partition unit 130 is moved by a transfer mechanism 560 controlled according to the flow rate of the humidifying fluid The transfer mechanism 560 is configured to transfer the partition unit 130 as the transfer wires 561 and 561 ′ are wound and unwound rolls 562 and 562 ′. The transfer wires 561 and 561' and the rolls 562 and 562' are installed on both sides of the partition unit 130, respectively, and as the rolls 562 and 562' rotate in the forward and reverse directions, the transfer wires 561 and 561 ') through the partition unit 130 is transferred. One end of the conveying wires 561 and 561' is fixed to the partition 130, and the other end of the conveying wires 561 and 561' is wound and unwound on the rolls 562 and 562'. The rolls 562 and 562' are controlled by sensing the flow rate of the humidification fluid flowing into the inflow space S1. The remaining configuration of the hollow fiber membrane humidification module 500 according to the fifth embodiment is the same as or similar to the first embodiment, so a detailed description thereof will be omitted.

7 is a partially exploded perspective view of a hollow fiber membrane humidification module according to a sixth embodiment of the present invention. As shown, the hollow fiber membrane module 600 according to the sixth embodiment includes a housing 610, a hollow fiber membrane bundle 620, a partition (not shown), a potting part 640, and a cover 650. (650'). The shape of the hollow fiber membrane humidification module 600 of the sixth embodiment is cylindrical, and the rest of the configuration is similar to that of the first embodiment, so a detailed description will be omitted.

Hereinafter, manufacturing examples 1 and 2 in which the hollow fiber membrane humidification module was manufactured according to the second embodiment (FIG. 3) and the third embodiment (FIG. 4) of the present invention, and the conventional hollow fiber membrane humidification module of FIG. It will be described in more detail the configuration and effects of the present invention through the manufacturing comparative examples and experimental examples. The manufacturing examples are merely illustrative of the present invention, and the contents of the present invention are not limited by the following examples.

[Production Example: Preparation of a hollow fiber membrane humidification module]

(Production Example 1-Fig. 3)

12 cartridges divided into 12 bundles (120) of 4,200 polysulfone hollow fiber membranes (121, outer diameter 900um, inner diameter 800um) were placed inside a rectangular housing (250mm wide, 150mm long, 300mm long). After potting to form potting portions (140. 140') at both ends of the housing 110, a hollow fiber membrane humidification module 200 was manufactured by covering both ends of the housing 110 with covers. At this time, the hollow fiber membrane humidification module 200 is divided into an inlet space (S1) and an outlet space (S2) by a partition unit 130, and while the partition unit 130 moves according to the flow rate of the humidifying fluid, the spring 260 It was manufactured to restore according to the elastic force of ).

(Production Example 2-Fig. 4)

12 cartridges divided into 12 bundles (120) of 4,200 polysulfone hollow fiber membranes (121, outer diameter 900um, inner diameter 800um) were placed inside a rectangular housing (250mm wide, 150mm long, 300mm long). After potting to form potting portions 140. 140' at both ends of the housing 110, a hollow fiber membrane humidification module 300 was manufactured by covering both ends of the housing 110 with covers. At this time, the hollow fiber membrane humidification module 300 is divided into an inlet space (S1) and an outlet space (S2) by a partition unit 330, and the partition unit 330 moves the guide rail 360 according to the flow rate of the humidifying fluid. It was prepared to ride and move.

(Production Comparative Example)

As shown in Fig. 8, 4,200 polysulfone hollow fiber membranes 721 (outer diameter 900um, inner diameter 800um) as one bundle cartridge 720 are placed inside a rectangular housing (250mm wide, 150mm long, 300mm long), and the housing (710) After forming the potting portions 740 and 740' at both ends, a cover was placed on both ends of the housing 710 to manufacture a hollow fiber membrane humidification module 700. At this time, the inside of the hollow fiber membrane humidification module 700 was manufactured to be a single space without a partition.

[Experimental Example: Performance measurement of the manufactured hollow fiber membrane humidification module]

50g/sec of dry air was introduced into each of the inside and outside of the hollow fiber membrane of the hollow fiber membrane humidification module prepared in the above Production Example and Production Comparative Example, and the outside of the hollow fiber membrane was fixed at 70°C and 90% humidity, and the inside of the hollow fiber membrane Was fixed at a temperature of 40° C. and a humidity of 10% to perform gas-gas humidification. At this time, the flow rate of the incoming air was divided into 600 slpm, 800 slpm, 1000 slpm, 1200 slpm and 1500 slpm, and the experiment was performed. In Manufacturing Example 1 and Example 2, the position of the partition according to the flow rate (L1:L2) was 5:5 at 600 slpm, 6:4 at 800 slpm, 7:3 at 1000 slpm, and 1200 slpm It is 8:2, and 9:1 at 1500 slpm.

Humidification performance was measured by measuring the temperature and humidity at the point where the air flowing inside the hollow fiber membrane is humidified and converted into a dew point, and the results are shown in Table 1 below together with the number of potting.

division Manufacturing Comparative Example Manufacturing Example 1 Manufacturing Example 2 Module form No compartment Spring type
Division Guide rail type
Division Humidification performance
Evaluation condition 600~1500slpm
Evaluation by flow rate 600~1500slpm
Evaluation by flow rate 600~1500slpm
Evaluation by flow rate Humidification performance (℃) At 58℃ at 600slpm
At 1500slpm
Change to 53℃ 58℃ maintenance 58℃ maintenance

Referring to Table 1, it can be seen that in Preparation Comparative Example, the humidification performance decreases as the flow rate increases, but in Preparation Example 1 and Preparation Example 2, even if the flow rate increases, the humidification performance remains constant.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also present. It belongs to the scope of rights of

100, 200, 300, 400, 500, 600: Hollow fiber membrane humidification module
110: housing 111: inlet
112: outlet 120: bundle of hollow fiber membranes
121: hollow fiber membrane 130, 330,: division
140, 140': potting part 150, 150': cover
260: spring 360: guide rail
460, 560: transfer mechanism
S1: Inflow space S2: Outflow space

Claims (12)

A housing having an inlet through which the humidification fluid of high temperature and humidity flows in at one end and an outlet through which the humidification fluid that has humidified the inside is exited at the other end;
At least one or more hollow fiber membrane bundles inserted along the longitudinal direction inside the housing,
A partition portion for supporting the hollow fiber membrane bundle and partitioning an inflow space in which the humidifying fluid flowing into the housing through the inlet temporarily stays and an outlet space in which the humidifying fluid temporarily stays before flowing out through the outlet,
A potting part for potting both ends of the hollow fiber membrane bundle to the housing,
It is installed in the outlet space, and one end is fixed to the partition portion and the other end includes a spring fixed to the potting portion,
The partition unit is a hollow fiber membrane humidification module, characterized in that to change the size of the inlet space and the outlet space by moving according to the flow rate of the humidifying fluid introduced through the inlet and the elastic force of the spring. The method according to claim 1,
A hollow fiber membrane humidification module, characterized in that the size of the inflow space is changed to be equal to or larger than the size of the outflow space according to the flow rate of the humidifying fluid. The method according to claim 1,
A hollow fiber membrane humidification module, characterized in that the ratio of the lengthwise length of the housing of the inflow space and the lengthwise length of the housing of the outlet space is varied from 5:5 to 9:1. The method according to claim 1,
It further includes a guide rod,
The spring is a hollow fiber membrane humidification module, characterized in that guided by being inserted into the guide rod. The method according to claim 1,
The partition unit is a hollow fiber membrane humidification module, characterized in that to move along a guide rail. delete delete delete The method according to claim 1,
The hollow fiber membrane humidification module, characterized in that one or a plurality of the hollow fiber membrane bundle. The method according to claim 1,
The hollow fiber membrane bundle is a hollow fiber membrane humidification module, characterized in that it contains 30 to 60% by volume of the hollow fiber membrane with respect to the total volume. The method according to claim 1,
The hollow fiber membrane humidification module, characterized in that the cross-sectional shape of the hollow fiber membrane bundle is made of a circular, oval, or polygonal shape. The method according to claim 1,
The housing is a hollow fiber membrane humidification module, characterized in that the cross-sectional shape is made of a circular, oval, or polygonal.

Images