Evaporative cooling packs with same direction corrugations designed to prevent nesting

Abstract

An evaporative cooling pack formed from first and second corrugated media sheets is provided. The evaporative cooling pack uses a cooling fluid to cool an air stream. The first and second corrugated media sheets have flutes that extend at different angles relative to a reference line and have a flute spacing that inhibits nesting of adjacent sheets at such relative angles.

Description

Technical Field

[0001] The present invention relates generally to evaporative cooling, and more specifically to evaporative cooling pads for cooling inlet air entering a gas turbine. Background Technology

[0002] Gas turbine engines are widely used in fields such as power generation. A traditional gas turbine engine consists of a compressor for compressing ambient air, a combustor for mixing and burning the compressed air with a fuel stream, and a turbine that generates power by driving the combustion mixture.

[0003] Several strategies have been known to increase the power output of gas turbine engines. One approach is to cool the ambient air upstream of the compressor. This cooling results in a higher air density, leading to a higher mass flow rate into the compressor. This higher mass flow rate allows more air to be compressed, thus enabling the gas turbine to generate more power. Furthermore, cooling the ambient air generally improves the overall efficiency of gas turbine engines operating at high temperatures.

[0004] Various systems and methods can be used to cool the ambient air entering a gas turbine engine. For example, heat exchangers can be used to cool the ambient air by latent heat cooling or sensible heat cooling. Such heat exchangers often utilize evaporative cooling packs to facilitate the cooling of the ambient air. These evaporative cooling packs allow heat and / or mass transfer between the ambient air and the coolant flow. The ambient air interacts with the coolant flow within the evaporative cooling pack to exchange heat with it. These evaporative cooling packs are also called media pads.

[0005] The evaporative cooling pack includes a layer of corrugated sheet material having grooves that define an airflow path through the evaporative cooling pack.

[0006] Figure 1 The diagram illustrates the nesting problem in evaporative cooling packages using stacked layers of corrugated sheets. In this example, two dielectric sheets 10 (solid line) and 12 (dashed line) are shown. Here, the corrugations of adjacent sheets are nested within each other. Due to this nesting, the airflow channel 14 formed between adjacent sheets 10 and 12 is closed, restricting airflow. Restricted airflow can reduce the efficiency of the dielectric package.

[0007] The nesting problem of evaporative cooling packs is particularly severe when all the sheets have grooves oriented with the same positive or negative slope. This allows for... Figure 1 In the diagram, the peak 20 of a sheet 10 is aligned with the peak 22 of an adjacent sheet 12, and similarly, the valley 24 of a sheet 10 is aligned with the valley 26 of an adjacent sheet 12, such that the sheets will be nested together.

[0008] Figure 2 The diagram illustrates a preferred arrangement of adjacent sheets 30 (solid lines) and 32 (dashed lines). Here, the valley 34 of one sheet 30 is aligned with the peak 36 of the adjacent sheet 32. This creates an interference that prevents the two sheets 30, 32 from nesting together, maximizing the cross-sectional area of ​​the flow channel 40 formed between the adjacent sheets 30, 32.

[0009] Examples of this disclosure provide improvements in evaporative cooling packages for use in evaporative cooling systems that use cooling fluid to cool a stream of air passing through the evaporative cooling package. Summary of the Invention

[0010] In one example, a novel and improved evaporative cooling pack is provided that inhibits nesting of adjacent sheets of the evaporative cooling pack. In another example, a novel and improved evaporative cooling system using the said evaporative cooling pack is provided.

[0011] In this example, an evaporative cooling pack formed from first and second corrugated dielectric sheets is provided. The evaporative cooling pack utilizes a cooling fluid to cool an airflow. The first corrugated dielectric sheet has multiple grooves in a first segment. The grooves in the first segment extend at a first angle (θ1) relative to a reference line. The grooves in the first segment have a first groove spacing (f1) measured perpendicular to the grooves in the first segment. The grooves in the first segment have a depth (d) measured parallel to the reference line. A second corrugated dielectric sheet is adjacent to the first corrugated dielectric sheet. The second corrugated dielectric sheet has multiple grooves in a second segment. When the sheets are stacked, the grooves in the first segment are adjacent to the grooves in the second segment. The grooves in the second segment have a second groove spacing (f2) measured perpendicular to the grooves in the second segment. The grooves in the second segment extend at a second angle (θ2) relative to a reference line. The second angle (θ2) is different from the first angle (θ1). The second angle (θ2) has a minimum value determined by the following equation:

[0012]

[0013] The second groove spacing (f2) relative to the first groove spacing (f1) is determined by the following equation:

[0014]

[0015] In one example, the first corrugated dielectric sheet has multiple grooves in a third segment. The grooves in the third segment extend at a third angle (θ3) relative to a reference line. This third angle (θ3) differs from the first and second angles (θ1, θ2).

[0016] In one example, the grooves in the first segment have a positive slope relative to the reference line, and the grooves in the third segment have a negative slope relative to the reference line.

[0017] In one example, the grooves in the multiple grooves of the second segment have a positive slope relative to the reference line.

[0018] In one example, the groove of the first segment connects to the groove of the third segment to form a continuous groove, the continuous groove having a bend where the groove of the first segment connects to the groove of the third segment.

[0019] In one example, the reference line is parallel to the first side of the first sheet and the first side of the second sheet. The first side of the first sheet is parallel to the first side of the second sheet.

[0020] In one example, a first sheet has first, second, and third sides. The first side extends between and perpendicular to the second and third sides. The second and third sides are parallel. A second sheet has first, second, and third sides. The first side extends between and perpendicular to the second and third sides. The second and third sides are parallel. A reference line is parallel to the first side of the first sheet and parallel to the first side of the second sheet.

[0021] In one example, the grooves in the first segment extend in a parallel relationship. Similarly, the grooves in the second segment extend in a parallel relationship.

[0022] In one example, the difference between the third angle and the first angle is that the slope of the grooves in the first segment relative to the reference line is positive, while the slope of the grooves in the third segment relative to the reference line is negative.

[0023] In one example, the difference between the third angle (θ3) and the first angle (θ1) is that the value of the third angle (θ3) is greater than the value of the first angle (θ1). Both the first and third angles (θ1, θ3) are acute angles.

[0024] In one example, the first sheet includes a fourth side parallel to a first side portion of the first sheet. The second sheet has a fourth side portion parallel to the first side portion of the second sheet. The fourth side portion provides a cooling fluid inlet. The second side portion provides an air inlet. The third side portion is an air outlet. When moved along a direction extending from the second side portion toward the third side portion, the groove in the recess of the first segment has an upward pointing component extending against gravity. When moved along a direction extending from the second side portion toward the third side portion, the groove in the recess of the second segment has an upward pointing component extending against gravity.

[0025] In one example, when moving along a direction extending from the second side toward the third side, the groove of the third segment has a downward pointing component that extends with gravity.

[0026] In one example, the groove of the third segment begins at the second side and does not extend to the third side. The groove of the first segment begins offsetly at the second side and ends at the third side.

[0027] In one example, the grooves of the first segment are adjacent to the first portion of the grooves of the second segment, and the grooves of the third segment are adjacent to the second portion of the grooves of the second segment, for example, when the first and second sheets are stacked.

[0028] In one example, a plurality of first pleated dielectric sheets and a plurality of second pleated dielectric sheets are stacked alternately between the first pleated dielectric sheets and the second pleated dielectric sheets.

[0029] In one example, the bend is located between the second and third sides and forms an axis that is generally perpendicular to the reference line.

[0030] In one example, the axis is positioned closer to the exit side than to the inlet side.

[0031] In another example, an evaporative cooling system is provided. The system includes a housing having a cooling fluid supply section, an air inlet, and an air outlet. The system includes an evaporative cooling package as described above, positioned within the housing between the air inlet and the air outlet. The grooves in a plurality of grooves in a first section and the grooves in a plurality of grooves in a second section are oriented such that the air exiting the evaporative cooling fluid has an upwardly extending orientation.

[0032] In one example, the cooling fluid supply section is positioned such that the cooling fluid flows vertically downwards through the evaporative cooling pack due to gravity.

[0033] Other aspects, objects, and advantages of the invention will become more apparent from the following detailed description when understood in conjunction with the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several aspects of the invention and, together with this specification, serve to explain the principles of the invention. In the drawings:

[0035] Figure 1 This is a schematic representation of nested sheets in an evaporative cooling package;

[0036] Figure 2 It is a schematic representation of an evaporative cooling package without nested sheets;

[0037] Figure 3 This is a schematic diagram of a gas turbine system, which includes an evaporative cooling system according to an example of this disclosure;

[0038] Figure 4 This is a schematic diagram of the side of the evaporative cooling pack according to the present disclosure;

[0039] Figure 5 yes Figure 4 A simplified illustration of the first sheet of the evaporative cooling package;

[0040] Figure 6 yes Figure 4 A simplified illustration of the second sheet of the evaporative cooling package; and

[0041] Figure 7 yes Figure 5 and Figure 6 A simplified schematic illustration of the first and second sheets, which are stacked to show the relative orientation of the grooves in the first and second sheets.

[0042] Although the invention will be described in conjunction with certain preferred embodiments, it is not intended to limit the invention to these embodiments. Rather, it is intended to cover all alternatives, modifications, and equivalents included within the spirit and scope of the invention as defined in the appended claims. Detailed Implementation

[0043] Figure 3 This is a schematic diagram of a gas turbine system 100, which includes an air feed unit 102 that supplies air to a gas turbine 104. The air feed unit 102 includes a housing 105 having an air inlet 106 and an air outlet 108. Air 109 combusted within the gas turbine 104 enters through the inlet 106 and exits through the outlet 108.

[0044] Evaporative cooling unit 110 is located within housing 105 between air inlet 106 and air outlet 108. Cooling fluid supply unit 112 is located within housing 105 to supply cooling fluid 114 to evaporative cooling unit 110.

[0045] In this example, the cooling fluid supply unit 112 is located vertically above the evaporative cooling pack 110, and the cooling fluid 114 flows vertically downward through the evaporative cooling pack 110. Air 109 flows laterally through the evaporative cooling pack 110 with an orientation that is oblique to the flow of the cooling fluid 114.

[0046] The cooling fluid supply section 112 may have nozzles distributed across the top of the evaporative cooling pack 110. As mentioned above, in this example, the cooling fluid 114 flows vertically downward to keep the evaporative cooling pack 110 moist, so that the air 109 flowing through the evaporative cooling pack 110 can interact with the cooling fluid 114 and transfer heat to the cooling fluid 114.

[0047] In this example, side 120 of the evaporative cooling pack 110 forms an inlet side, through which air 109 enters the evaporative cooling pack 110. Conversely, side 122 forms an outlet side, through which air 109 exits the evaporative cooling pack 110. Side 124 forms the vertical top of the evaporative cooling pack 110 and forms a cooling fluid inlet. Any unevaporated cooling fluid 114 will exit the evaporative cooling pack 110 through side 126, which forms the vertical bottom of the evaporative cooling pack 110 and forms a cooling fluid outlet.

[0048] In some examples, the evaporative cooling pack 110 is rectangular, such that the sides 120, 122 are parallel to each other and perpendicular to the sides 124, 126, which are also parallel to each other.

[0049] The evaporative cooling pack 110 is formed of multiple layers of corrugated sheets. Figure 4 A simplified schematic side view of the evaporative cooling pack 110 is shown, illustrating multiple sheets stacked adjacent to each other. In this example, there are multiple first sheets 130 (solid lines) and multiple second sheets 132 (dashed lines), which are arranged in an alternating manner such that each first sheet 130 is located between a pair of second sheets 132 and each second sheet is located between a pair of first sheets 130.

[0050] The peaks and valleys of sheets 130 and 132 form grooves in each sheet 130 and 132. The grooves in adjacent sheets 130 and 132 combine to form a flow channel 134 through which air flows when cooled.

[0051] Figure 5 This is a simplified illustration of an example of the first sheet 130, and Figure 6 This is a simplified illustration of an example of the second sheet 132. In this diagram, solid lines represent peaks, while dashed lines represent valleys between adjacent peaks.

[0052] In the illustrated example, sheets 130 and 132 are rectangular in shape, and each first sheet 130 has a first side 136, a second side 137, a third side 138, and a fourth side 139. The first side 136 and the fourth side 139 are parallel. The second side 137 and the third side 138 are parallel. The first side 136 and the fourth side 139 are perpendicular to the second side 137 and the third side 138.

[0053] Each second sheet 132 has a first side 140, a second side 141, a third side 142, and a fourth side 143. The first side 140 and the fourth side 143 are parallel. The second side 141 and the third side 142 are parallel. The first side 140 and the fourth side 143 are perpendicular to the second side 141 and the third side 142.

[0054] When stacked, the first sides 136 and 140 are adjacent to each other, the second sides 137 and 141 are adjacent to each other, the third sides 138 and 142 are adjacent to each other, and the fourth sides 139 and 143 are adjacent to each other, such that the resulting evaporative cooling pack 110 is a generally rectangular prism.

[0055] In this example, the second sides 137 and 141 form air inlets entering the evaporative cooling pack 110, and the third sides 138 and 142 form air outlets exiting the evaporative cooling pack 110, and when used in... Figure 3 In the system illustrated, the fourth sides 139 and 143 form the cooling fluid inlet / receiver of the evaporative cooling pack 110.

[0056] In this example, peak 150 (solid line) and valley 152 (dashed line) form a groove 154 extending between the second side 137 and the third side 138. It is noteworthy that the first sheet 130 includes a groove 156 in a first segment and a groove 158 in a third segment. For some or most of the grooves 154, a portion of the groove 154 is formed by the groove 156 in the first segment, and a portion of the groove is formed by the groove 158 in the third segment.

[0057] Here, the portion of the groove 154 formed in the groove 156 of the first segment has a first angle θ1 (also called the first groove angle) formed with the reference line (e.g., the first side 136), while the portion of the groove 154 formed in the groove 158 of the third segment has a third angle θ3 (also called the third groove angle) relative to the reference line (again, for example, the first side 136).

[0058] In this example, the first angle θ1 and the third angle θ3 are different angles. In this example, when viewed from the second side 137 to the third side 138, the angles differ in both magnitude and slope. The third angle θ3 has a larger magnitude than the first angle θ1. In this example, the portion of the groove 154 located in the groove 156 of the first segment has a positive slope relative to the first side 136. More specifically, when moved laterally along a direction extending from the inlet side to the outlet side, this portion extends vertically upwards, while when moved along the same direction from the second side 137 to the third side 138, the portion of the groove 154 located in the groove 158 of the third segment has a negative slope relative to the first side 136. More specifically, when moved laterally from the inlet side to the outlet side, this portion extends vertically downwards.

[0059] It is worth noting that the first angle θ1 and the third angle θ3 are two angles relative to the first side 136.

[0060] In some examples, the portion of groove 154 within groove 156 of the first section guides the airflow generally vertically against gravity, while the portion of groove 154 within groove 158 of the third section guides the airflow generally vertically with gravity. It is worth noting that, in addition to the aforementioned vertical component, the airflow also has a lateral component as it flows from the inlet side to the outlet side (e.g., from the second side 137 to the third side 138).

[0061] As the groove moves from the inlet side (e.g., the second side 137) to the outlet side (e.g., the third side 138), the different angles θ1 and θ3 create bends 160 in each groove 154. In this example, the bends 160 of adjacent grooves generally define an axis 162 that is generally parallel to the second side 137 and the third side 138 and generally perpendicular to the first side 136 and the fourth side 139.

[0062] In this example, the two portions of each groove 154 (i.e., the portion forming segment 156 and the portion forming segment 158) extend to all sides 136-139 of the first sheet at a non-parallel, non-perpendicular angle.

[0063] The portion of groove 154 within groove 156 of the first segment has a spacing f1, which is measured substantially perpendicular to the extension of groove 154 within groove 156 of the first segment. Preferably, all portions of groove 154 within groove 156 of the first segment are parallel to each other. The portions of groove 154 within the third segment 158 ​​may be parallel to each other or may not be parallel to each other.

[0064] Additionally, the groove 156 of the first segment has a depth d measured parallel to a reference line (e.g., the first side 136). In this example, the depth d is measured between the axis 162 and the third side 138.

[0065] Figure 6 The figure illustrates a second sheet 132. The second sheet is corrugated and has peaks 172 and valleys 170, which are illustrated by dotted and dashed lines, respectively. Again, the peaks 172 and valleys 170 define recesses 174, which, when stacked with the first sheet 130, form portions of air passages through the evaporative cooling pack 110.

[0066] In this example, as the material moves from the second side 141 toward the third side 142, the grooves 174 extend generally linearly. Here, the entire sheet 132 forms the grooves 178 of the second segment. In this example, the grooves 178 of the second segment have a second angle θ2 relative to a reference line (e.g., the first side 140). To avoid nesting, the second angle θ2 has a different value than the first angle θ1. This is especially true when both the first angle θ1 and the second angle θ2 have positive slopes relative to the reference line. If the angles were the same, then nesting would likely occur between the first segment 156 and the second segment 178 when stacked to form the evaporative cooling pack 110.

[0067] When stacked, the first segment 156 and the third segment 158 ​​of the first sheet 130 will be adjacent to the corresponding portions of the second segment 178 of the second sheet 132. However, due to the fact that the third segment 158 ​​has a negative slope and the second segment 178 has a positive slope, these segments are unlikely to nest.

[0068] The closer the values ​​of the first angle θ1 and the second angle θ2 are, the more likely nesting is to occur. The applicant has determined that, based on the depth d, the first angle θ1, and the groove spacing f1, the minimum angle θ for the second angle θ2 is... 2,min It can be determined based on the following equation:

[0069]

[0070] Furthermore, the groove spacing f2 can be determined based on the following equation:

[0071]

[0072] This is to avoid or significantly limit nesting between grooves 154 and 174 in groove 156 of the first segment and groove 178 of the second segment. This is especially true in other examples where the slopes of grooves 154 and 157 are both positive or both are negative.

[0073] Under these constraints, and when the first sheet 130 is below the second sheet 132, the peaks 150 of the grooves 156 in the first segment of the first sheet 130 will overlap / intersect with one or more valleys 170 of the grooves 178 in the second segment of the second sheet 132. This overlap / intersection prevents nesting. Again, this assumes that the second sheet 132 is on top of the first sheet 130. Alternatively, when the first sheet 130 is on top of the second sheet 132, the valleys 152 of the grooves 156 in the first segment of the first sheet 130 will overlap / intersect with one or more peaks 172 of the grooves 178 in the second segment of the second sheet.

[0074] In the preferred arrangement, the intersection of the corresponding peaks 150 and valleys 170 occurs, for example, near the axis 162 and near the third sides 138 and 142, as shown in... Figure 7 As shown in the diagram. It is worth noting that in... Figure 7 In this process, the valley 170 of the second sheet, which intersects at two locations, actually intersects with the two separate peaks 150 of the first sheet. More specifically, a given valley 170 of the second sheet intersects with the first peak 150 (e.g., adjacent to axis 162) and then also with the second peak 150 (e.g., adjacent to side portions 138 / 142).

[0075] The combination of the first angle θ1, the second angle θ2, and the third angle θ3 controls the airflow through the evaporative cooling pack and thus the rate of evaporation of the cooling fluid. It is desirable to keep substantially the entire vertical extent of the evaporative cooling pack 110 moist so that the air flowing through all the recesses is exposed to the cooling effect of the evaporative cooling pack 110 at all vertical positions.

[0076] All references cited herein (including publications, patent applications and patents) are hereby incorporated by reference as if each reference were individually and specifically indicated to be incorporated by reference and to present its entire contents herein.

[0077] Unless otherwise stated herein or in a context that clearly contradicts it, the use of the terms “a,” “this,” and “the,” and similar designations in the context of describing the invention (particularly in the context of the following claims) should be interpreted as encompassing both the singular and plural. The terms “comprising,” “having,” “including,” and “comprising of” should be interpreted as open-ended terms (i.e., meaning “including, but not limited to,”) unless otherwise stated. Unless otherwise stated herein, the descriptions of numerical ranges herein are intended only as a shorthand for individually referring to each individual numerical value falling within that range, and each individual numerical value is incorporated into this specification as if it were individually described herein. Unless otherwise stated herein or otherwise clearly contradicted by the context, all methods described herein can be implemented in any suitable order. The use of any and all examples or exemplary language (e.g., “for example”) provided herein is intended only to better illustrate the invention and, unless otherwise stated, does not limit the scope of the invention. No language in the specification should be construed as indicating that any unclaimed element is essential to the implementation of the invention.

[0078] Preferred embodiments of the invention have been described herein, including the best mode known to the inventors for carrying out the invention. Variations of these preferred embodiments will become apparent to those skilled in the art upon reading the above description. The inventors intend that those skilled in the art will employ such variations as appropriate, and the inventors also intend that the invention be practiced in ways other than those specifically described herein. Therefore, the invention includes all modifications and equivalents of the subject matter set forth in the appended claims as permitted by applicable law. Furthermore, unless otherwise stated herein or otherwise clearly contradicted by the context, any combination of the foregoing elements in all possible variations of the invention is also covered by the invention.

Claims

1. An evaporative cooling pack for using a cooling fluid to cool an airflow, the evaporative cooling pack comprising: A first corrugated dielectric sheet has a plurality of grooves in a first segment, wherein the grooves in the first segment extend at a first angle (θ1) relative to a reference line, the grooves in the first segment have a first groove spacing (f1) measured perpendicular to the grooves in the first segment, and the grooves in the first segment have a depth (d) measured parallel to the reference line. A second corrugated dielectric sheet is adjacent to the first corrugated dielectric sheet. The peaks and valleys of both the first and second corrugated dielectric sheets form grooves in each sheet. The grooves in the adjacent first and second corrugated dielectric sheets combine to form a flow channel for airflow. The second corrugated dielectric sheet has multiple grooves in a second segment. The multiple grooves in the first segment are adjacent to the multiple grooves in the second segment. The multiple grooves in the second segment have a second groove spacing (f2) perpendicular to the grooves of the second segment. The grooves in the multiple grooves of the second segment extend at a second angle (θ2) relative to a reference line, the second angle (θ2) being different from the first angle (θ1). The second angle (θ2) has a minimum value determined by the following equation: Furthermore, the second groove spacing (f2) relative to the first groove spacing (f1) is determined by the following equation:

2. The evaporative cooling pack according to claim 1, wherein, The first pleated dielectric sheet has a plurality of grooves in a third segment, wherein the grooves in the third segment extend at a third angle (θ3) relative to a reference line, the third angle (θ3) being different from the first and second angles (θ1, θ2).

3. The evaporative cooling pack according to claim 2, wherein, The grooves in the first section have a positive slope relative to the reference line, while the grooves in the third section have a negative slope relative to the reference line.

4. The evaporative cooling pack according to claim 3, wherein, The grooves in the second section have a positive slope relative to the reference line.

5. The evaporative cooling pack according to claim 2, wherein, The groove of the first section connects to the groove of the third section, forming a continuous groove, wherein the continuous groove has a bend where the groove of the first section connects to the groove of the third section.

6. The evaporative cooling pack according to claim 1, wherein, The reference line is parallel to the first side of the first corrugated dielectric sheet and the first side of the second corrugated dielectric sheet, and the first side of the first corrugated dielectric sheet is parallel to the first side of the second corrugated dielectric sheet.

7. The evaporative cooling pack according to claim 5, wherein: The first corrugated dielectric sheet has a first side, a second side, and a third side, wherein the first side of the first corrugated dielectric sheet extends between and perpendicular to the second and third sides, and the second and third sides are parallel. The second corrugated dielectric sheet has a first side, a second side, and a third side, wherein the first side extends between and perpendicular to the second and third sides, and the second and third sides are parallel; and The reference line is parallel to the first side of the first wrinkled dielectric sheet and parallel to the first side of the second wrinkled dielectric sheet.

8. The evaporative cooling pack according to claim 1, wherein: The grooves in the multiple grooves of the first section extend in a parallel relationship; and In the second section, the grooves in the multiple grooves extend in a parallel relationship with each other.

9. The evaporative cooling pack according to claim 2, wherein, The difference between the third angle and the first angle is that the slope of the grooves in the first segment relative to the reference line is positive, while the slope of the grooves in the third segment relative to the reference line is negative.

10. The evaporative cooling pack according to claim 9, wherein, The difference between the third angle (θ3) and the first angle (θ1) is that the value of the third angle (θ3) is greater than the value of the first angle (θ1), and both the first and third angles (θ1, θ3) are acute angles.

11. The evaporative cooling pack according to claim 7, wherein: The first corrugated dielectric sheet includes a fourth side portion parallel to a first side portion of the first corrugated dielectric sheet; The second corrugated dielectric sheet has a fourth side portion parallel to the first side portion of the second corrugated dielectric sheet; The fourth side provides a cooling fluid inlet; The second side provides an air inlet, and the third side is an air outlet; When moving along the direction extending from the second side to the third side, the groove in the first segment has an upward pointing component that extends against gravity; and When moving along the direction extending from the second side to the third side, the groove in the groove of the second section has an upward pointing component that extends against gravity.

12. The evaporative cooling package according to claim 11, wherein, When moving along the direction extending from the second side to the third side, the groove of the third section has a downward pointing component that extends with gravity.

13. The evaporative cooling package according to claim 12, wherein: The groove in the third section begins on the second side and does not extend to the third side; and The groove of the first section begins offset from the second side and ends at the third side.

14. The evaporative cooling pack according to claim 5, wherein, The grooves in the first segment are adjacent to the first part of the grooves in the second segment, and the grooves in the third segment are adjacent to the second part of the grooves in the second segment.

15. The evaporative cooling pack of claim 1, comprising a plurality of first pleated dielectric sheets and a plurality of second pleated dielectric sheets, the first and second pleated dielectric sheets being stacked alternately between the first pleated dielectric sheets and the second pleated dielectric sheets.

16. The evaporative cooling package according to claim 7, wherein, The bent portion is located between the second and third sides and forms an axis that is generally perpendicular to the reference line.

17. The evaporative cooling pack according to claim 16, wherein, The axis is positioned closer to the third side than to the second side, and the depth (d) is defined between the axis and the third side and perpendicular to the axis and the third side.

18. An evaporative cooling system, comprising: A housing having a cooling fluid supply section, an air inlet, and an air outlet; The evaporative cooling pack as described in any of the preceding claims, wherein the evaporative cooling pack is located within the enclosure between the air inlet and the air outlet, wherein the grooves in the plurality of grooves in the first section and the grooves in the plurality of grooves in the second section are oriented such that the air leaving the evaporative cooling fluid has an upwardly extending orientation.

19. The evaporative cooling system according to claim 18, wherein, The cooling fluid supply section is positioned such that the cooling fluid flows vertically downwards through the evaporative cooling pack due to gravity.

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