Evaporative cooling packs designed so that grooves in the same direction do not nest together

Abstract

An evaporative cooling pack is provided that is formed from a first corrugated media sheet and a second corrugated media sheet. The evaporative cooling pack uses a cooling fluid to cool an airflow. The first corrugated media sheet and the second corrugated media sheet have grooves that extend at different angles relative to a reference line, with the groove pitch at such relative angles preventing adjacent sheets from nesting.

Description

[Technical Field]

[0001] Cross-reference to related patent applications This patent application claims the benefit of U.S. Provisional Patent Application No. 63 / 014,233, filed April 23, 2020, the entire teachings and disclosures of which are incorporated herein by reference.

[0002] The present invention relates generally to evaporative cooling, and more particularly to evaporative cooling pads that cool the air entering a gas turbine. [Background technology]

[0003] Gas turbine engines are widely used in fields such as power generation. To generate electricity, a conventional gas turbine engine includes a compressor that compresses ambient air, a combustor that mixes the compressed air with a fuel stream and burns the mixture, and a turbine driven by the combusted mixture.

[0004] Various strategies are known for increasing the amount of power a gas turbine engine can produce. One way to increase power output is by cooling the ambient air upstream of the compressor. Such cooling causes the air to have a higher density, which can create a higher mass flow rate in the compressor. A higher mass flow rate in the compressor allows more air to be compressed, allowing the gas turbine to generate more power. Additionally, cooling the ambient air can generally increase the overall efficiency of a gas turbine engine in high-temperature environments.

[0005] Various systems and methods may be utilized to cool the ambient air entering a gas turbine engine. For example, heat exchangers may be utilized to cool the ambient air through latent or sensible cooling. Such heat exchangers often utilize evaporative cooling packs to facilitate cooling of the ambient air. These evaporative cooling packs may enable 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 packs and exchanges heat with the coolant flow. These evaporative cooling packs may also be referred to as media pads.

[0006] The evaporative cooling pack includes a layer of corrugated sheet having grooves therein that define air flow paths through the evaporative cooling pack.

[0007] Figure 1 illustrates the problem of nesting in evaporative cooling packs that use a stack of corrugated sheets. In this example, two media sheets 10 (solid lines), 12 (dashed lines) are shown, where the corrugations of adjacent sheets nest within each other. Because of this nesting, the air flow passages 14 formed between adjacent sheets 10, 12 are closed, restricting airflow. The restricted airflow can reduce the efficiency of the media pack.

[0008] Nesting can be particularly problematic for evaporative cooling packs when the groove angles of all sheets are oriented with the same convex or concave slope, causing the sheets to nest with one another, as shown in FIG. 1, with peaks 20 of one sheet 10 aligning with peaks 22 of an adjacent sheet 12, and similarly, with valleys 24 of one sheet 10 aligning with valleys 26 of an adjacent sheet 12.

[0009] 2 shows a preferred configuration of adjacent sheets 30 (solid lines), 32 (dashed lines), where the valleys 34 of one sheet 30 are aligned with the peaks 36 of the adjacent sheet 32. This provides an interference that prevents the two sheets 30, 32 from nesting with one another, maximizing the cross-sectional area of ​​the flow channels 40 formed between the adjacent sheets 30, 32. Summary of the Invention [Problem to be solved by the invention]

[0010] Examples of the present disclosure provide improvements to evaporative cooling packs for use in evaporative cooling systems that use a cooling fluid to cool an airflow passing through the evaporative cooling pack. [Means for solving the problem]

[0011] In one example, a new and improved evaporative cooling pack is provided that prevents nesting of adjacent sheets of evaporative cooling packs. In another example, a new and improved evaporative cooling system that uses evaporative cooling packs is provided.

[0012] In one example, an evaporative cooling pack is provided that is formed from a first corrugated media sheet and a second corrugated media sheet. The evaporative cooling pack uses a cooling fluid to cool an airflow. The first corrugated media sheet has a first plurality of groove segments. The grooves of the first plurality of groove segments extend at a first angle (θ1) relative to a reference line. The first plurality of groove segments have a first groove pitch (f1) measured perpendicular to the grooves of the first segments. The grooves of the first plurality of groove segments have a depth (d) measured parallel to the reference line. A second corrugated media sheet is adjacent to the first corrugated media sheet. The second corrugated media sheet has a second plurality of groove segments. The first plurality of groove segments are adjacent to the second plurality of groove segments when the sheets are stacked. The second plurality of groove segments have a second groove pitch (f2) measured perpendicular to the grooves of the second segments. The grooves of the second plurality of groove segments extend at a second angle (θ2) relative to the reference line. The second angle (θ2) is different from the first angle (θ1). The second angle (θ2) is determined by the formula:

[0013]

number

[0014] has a minimum value determined by

[0015] The second groove pitch (f2) relative to the first groove pitch (f1) is determined by the formula:

[0016]

number

[0017] is determined by.

[0018] In one example, the first corrugated sheet of media has a third plurality of groove segments, the grooves of the third plurality of groove segments extending at a third angle (θ3) relative to the reference line, the third angle (θ3) being different from the first angle (θ1) and the second angle (θ2).

[0019] In one example, the grooves of the first plurality of groove segments have a convex slope relative to the reference line, and the grooves of the third plurality of groove segments have a concave slope relative to the reference line.

[0020] In one example, the grooves of the second plurality of groove segments have a convex slope relative to the reference line.

[0021] In one example, the grooves of the first segment are connected to the grooves of the third segment to form a continuous groove, the continuous groove having a bend where the grooves of the first segment connect to the grooves of the third segment.

[0022] In one example, the reference line is parallel to the first side of the first sheet and the first side of the second sheet, and the first side of the first sheet is parallel to the first side of the second sheet.

[0023] In one example, the first sheet has a first side, a second side, and a third side. The first side extends between the second side and the third side, perpendicular to the second side and the third side. The second side and the third side are parallel. The second sheet has a first side, a second side, and a third side. The first side extends between the second side and the third side, perpendicular to the second side and the third side. The second side and the third side are parallel. The reference line is parallel to the first side of the first sheet and parallel to the first side of the second sheet.

[0024] In one example, the grooves of the first plurality of groove segments extend parallel to one another, and the grooves of the second plurality of groove segments extend parallel to one another.

[0025] In one example, the third angle differs from the first angle in that the slope of the grooves in the first plurality of groove segments is convex relative to the reference line and the slope of the grooves in the third plurality of groove segments is concave relative to the reference line.

[0026] In one example, the third angle (θ3) differs from the first angle (θ1) in that the magnitude of the third angle (θ) is greater than the magnitude of the first angle (θ1). Both the first angle (θ1) and the third angle (θ3) are acute angles.

[0027] In one example, the first sheet includes a fourth side parallel to the first side of the first sheet. The second sheet includes a fourth side parallel to the first side of the second sheet. The fourth side provides a cooling fluid inlet. The second side provides an air inlet. The third side is an air outlet. The grooves of the first groove segment have an upward component extending against gravity when moving in a direction extending from the second side toward the third side. The grooves of the second groove segment have an upward component extending against gravity when moving in a direction extending from the second side toward the third side.

[0028] In one example, the grooves of the third section have a downward component that extends with gravity when moving in a direction extending from the second side toward the third side.

[0029] In one example, the grooves of the third section are on the second side and do not extend to the third side, and the grooves of the first section are offset from the second side and terminate at the third side.

[0030] In one example, for example, when the first sheet and the second sheet are laminated, the first plurality of groove segments are adjacent to a first portion of the second plurality of groove segments, and the third plurality of groove segments are adjacent to a second portion of the second plurality of groove segments.

[0031] In one example, a plurality of first corrugated media sheets and a plurality of second corrugated media sheets, the first corrugated media sheets and the second corrugated media sheets are stacked alternately between the first corrugated media sheets and the second corrugated media sheets.

[0032] In one example, the bend is disposed between the second side and the third side and forms an axis generally perpendicular to the reference line.

[0033] In one example, the axis is located closer to the outlet side than to the inlet side.

[0034] In another example, an evaporative cooling system is provided. The system includes a housing having a cooling fluid supply, an air inlet, and an air outlet. The system includes an evaporative cooling pack disposed within the housing between the air inlet and the air outlet, as generally described above. The grooves of the first plurality of groove segments and the grooves of the second plurality of groove segments are oriented such that air exiting the evaporative cooling fluid has an upwardly expanding orientation.

[0035] In one example, the cooling fluid supply is positioned so that the cooling fluid flows vertically downward by gravity through the evaporative cooling pack.

[0036] Other aspects, objects and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0037] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate several aspects of the invention and, together with the description, serve to explain the principles of the invention. [Brief explanation of the drawings]

[0038] [Figure 1] FIG. 1 is a schematic diagram of a sheet of nested evaporative cooling packs. [Figure 2] FIG. 1 is a schematic diagram of a sheet of unnested evaporative cooling packs. [Figure 3] 1 is a schematic diagram of a gas turbine system including an evaporative cooling system according to an example of the present disclosure. [Figure 4]1 is a schematic side view of an evaporative cooling pack according to the present disclosure; [Figure 5] 5 is a simplified diagram of a first sheet of the evaporative cooling pack of FIG. 4. [Figure 6] FIG. 5 is a simplified diagram of the second sheet of the evaporative cooling pack of FIG. 4. [Figure 7] 7 is a simplified diagram of the first and second sheets of FIGS. 5 and 6 stacked to show the relative orientation of the grooves in the first and second sheets. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0039] While the present invention will be described in terms of certain preferred embodiments, it is not intended to limit the invention to those embodiments, but on the contrary, it is intended to cover all alternatives, modifications, and equivalents included within the spirit and scope of the invention as defined by the appended claims.

[0040] 3 is a schematic diagram of a gas turbine system 100 that includes an air inlet 102 that supplies air to a gas turbine 104. The air inlet 102 includes a housing 105 having an air inlet 106 and an air outlet 108. Air 109 to be combusted within the gas turbine 104 enters through the inlet 106 and exits through the outlet 108.

[0041] Evaporative cooling pack 110 is located within housing 105 between air inlet 106 and air outlet 108. Cooling fluid supply 112 is located within housing 105 to supply cooling fluid 114 to evaporative cooling pack 110.

[0042] In this example, cooling fluid supply 112 is positioned vertically above evaporative cooling pack 110, and cooling fluid 114 flows vertically downward through evaporative cooling pack 110. Air 109 flows laterally through evaporative cooling pack 110 in a direction transverse to the flow of cooling fluid 114.

[0043] The cooling fluid supply 112 may have a nozzle that extends over the top of the evaporative cooling pack 110. As noted above, the cooling fluid 114 flows vertically downward in this example to keep the evaporative cooling pack 110 wet and allow the air 109 flowing through the evaporative cooling pack 110 to interact with and transfer heat to the cooling fluid 114.

[0044] In this example, side 120 of evaporative cooling pack 110 forms the inlet side where air 109 enters evaporative cooling pack 110. Opposite side 122 forms the outlet side where air 109 exits evaporative cooling pack 110. Side 124 forms the vertical top of evaporative cooling pack 110 and forms the cooling fluid inlet. Any cooling fluid 114 that is not vaporized exits evaporative cooling pack 110 through side 126. Side 126 forms the vertical bottom of evaporative cooling pack 110 and forms the cooling fluid outlet.

[0045] In some examples, evaporative cooling pack 110 is rectangular with sides 120, 122 parallel to one another and orthogonal to sides 124, 126 which are also parallel to one another.

[0046] Evaporative cooling pack 110 is formed from multiple layers of corrugated sheets. Figure 4 shows a side view of evaporative cooling pack 110 in simplified form, illustrating that multiple sheets are stacked adjacent to one another. In this example, multiple first sheets 130 (solid lines) and multiple second sheets 132 (dashed lines) alternate, such that each first sheet 130 is positioned between a pair of second sheets 132, and each second sheet is positioned between a pair of first sheets 130.

[0047] The peaks and valleys of the sheets 130, 132 form grooves in each 130, 132. The grooves in adjacent sheets 130, 132 connect to form air channels 134 through which air flows as it cools.

[0048] Figure 5 is a simplified diagram of an example of a first sheet 130, while Figure 6 is a simplified diagram of an example of a second sheet 132. In this drawing, solid lines represent peaks, while dashed lines represent valleys between adjacent peaks.

[0049] In the illustrated example, sheets 130, 132 are rectangular in shape, with each first sheet 130 having 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.

[0050] 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.

[0051] When stacked, first sides 136, 140 are adjacent to each other, second sides 137, 141 are adjacent to each other, third sides 138, 142 are adjacent to each other, and fourth sides 139, 143 are adjacent to each other, such that the resulting evaporative cooling pack 110 is a generally rectangular prism.

[0052] In this example, second sides 137, 141 form the air inlet to evaporative cooling pack 110, third sides 138, 142 form the air outlet from evaporative cooling pack 110, and when used in the system shown in Figure 3, fourth sides 139, 143 form the cooling fluid inlet / receiving end of evaporative cooling pack 110.

[0053] In this example, peaks 150 (solid lines) and valleys 152 (dashed lines) form grooves 154 that extend between second side 137 and third side 138. In particular, first sheet 130 includes first groove section 156 and third groove section 158. For some or most of groove 154, a portion of groove 154 is formed by first groove section 156 and a portion of groove is formed by third groove section 158.

[0054] Here, the groove portion 154 formed in the first groove section 156 has a first angle θ1 (also referred to as the first groove angle) formed with a reference line, e.g., the first side 136, while the groove portion 154 formed in the third groove section 158 has a third angle θ3 (also referred to as the third groove angle) with a reference line, e.g., also with the first side 136.

[0055] In this example, the first angle θ1 and the third angle θ3 are different angles. In this example, the angles differ in both magnitude and slope when viewed from the second side 137 to the third side 138. The third angle θ3 is greater in magnitude than the first angle θ1. In this example, the groove portions 154 in the first groove section 156 have a convex slope relative to the first side 136. More specifically, the groove portions 154 in the first groove section 156 extend vertically upward when moving laterally from the inlet side to the outlet side, while the groove portions 154 in the third groove section 158 have a concave slope relative to the first side 136 when moving in the same direction from the second side 137 to the third side 138. More specifically, the groove portions 154 of the third groove section 158 extend vertically downward when moving laterally from the inlet side to the outlet side.

[0056] In particular, the first angle θ 1 and the third angle θ 3 are both angles relative to the first side 136 .

[0057] In some examples, groove portions 154 in first groove segment 156 direct airflow generally vertically against gravity, while groove portions 154 in third groove segment 158 ​​direct airflow generally vertically with gravity. Notably, in addition to the vertical component just mentioned, the airflow also has a lateral component as air flows from the inlet side to the outlet side (e.g., from second side 137 to third side 138).

[0058] The difference between angles θ1 and θ3 results in a bend 160 in each groove 154 when moving from an inlet side, e.g., second side 137, to an outlet side, e.g., third side 138. In this example, the bends 160 of adjacent grooves generally define an axis 162 that is generally parallel to second side 137 and third side 138 and generally perpendicular to first side 136 and fourth side 139.

[0059] In this example, both portions of each groove 154 (ie, the portion forming section 156 and the portion forming section 158) extend at non-parallel, non-orthogonal angles to all of the first sheet's sides 136-139.

[0060] The groove portions 154 in the first groove section 156 have a pitch f1, where the pitch f1 is measured generally perpendicular to the extension of the grooves 154 in the first groove section 156. Preferably, all of the groove portions in the first groove section 156 are parallel to one another. The groove portions 154 in the third section 158 may or may not be parallel to one another.

[0061] Furthermore, first groove segment 156 has a depth d measured parallel to a reference line, such as first side 136. In this example, depth d is measured between axis 162 and third side 138.

[0062] 6 shows second sheet 132. Second sheet 132 is corrugated and has peaks 172 and valleys 170, indicated by dashed and dotted lines, respectively. Similarly, peaks 172 and valleys 170 define grooves 174 that, when laminated with first sheet 130, form portions of the air passageway through evaporative cooling pack 110.

[0063] In this example, groove 174 is substantially linear throughout its extension as it moves from second side 141 toward third side 142. Here, the entire sheet 132 forms second groove section 178. In this example, second groove section 178 has a second angle θ2 relative to a reference line, e.g., first side 140. To prevent nesting, second angle θ2 has a different magnitude than first angle θ1. This is particularly true when both first angle θ1 and second angle θ2 have a convex slope relative to the reference line. If these angles were the same, nesting would likely occur between first section 156 and second section 178 when stacked to form evaporative cooling pack 110.

[0064] When stacked, both the first section 156 and the third section 158 of the first sheet 130 are adjacent to corresponding portions of the second section 178 of the second sheet 132. However, because the third section 158 has a concave slope and the second section 178 has a convex slope, nesting between these sections is unlikely.

[0065] The closer the magnitudes of the first angle θ1 and the second angle θ2 are, the more likely nesting will occur. Applicants have determined the minimum angle θ for the second angle θ2 based on the depth d, the first angle θ1, and the groove pitch f1. 2,最小 The following formula:

[0066]

number

[0067] The Court decided that the decision may be made based on the following:

[0068] The groove pitch f2 is calculated using the following formula:

[0069]

number

[0070] may be determined based on the above to prevent or significantly limit nesting between grooves 154, 174 in first groove section 156 and second groove section 178. This is especially true when the slopes of grooves 154, 157 are both convex, or in other instances both concave.

[0071] Given these constraints, and when the first sheet 130 is underneath the second sheet 132, the peaks 150 of the first groove section 156 of the first sheet 130 will intersect / cross one or more valleys 170 of the second groove section 178 of the second sheet 132. This intersection / crossing between the peaks 150 and valleys 170 prevents nesting. Again, this assumes that the second sheet 132 is located 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 first groove section 156 of the first sheet 130 will intersect / cross one or more peaks 172 of the second groove section 178 of the second sheet.

[0072] In a preferred configuration, the intersection of corresponding peaks 150 / valleys 170 occurs in two locations, such as at the proximal axis 162 and adjacent third sides 138, 142, as shown in Figure 7. Notably, in Figure 7, a valley 170 of the second sheet that intersects at two locations actually intersects two individual peaks 150 of the first sheet. More specifically, a given valley 170 of the second sheet intersects a first peak 150 (e.g., at the proximal axis 162) and then also intersects a second peak 150 (e.g., at adjacent sides 138 / 142).

[0073] The combination of the first angle θ1, the second angle θ2, and the third angle θ3 can control the airflow through the evaporative cooling pack, thus rapidly evaporating the cooling fluid. It is desirable to substantially maintain the wetness of the evaporative cooling pack 110 throughout the entire vertical direction so that air flowing through all of the grooves is exposed to the cooling effect of the evaporative cooling pack 110 at all vertical positions.

[0074] All references, including publications, patent applications, and patents, cited herein are hereby incorporated by reference to the same extent as if each reference was individually and specifically indicated to be incorporated by reference and set forth in its entirety herein.

[0075] The use of the terms "a," "an," "the," and similar referents in the context of describing the present invention (particularly in the context of the claims below) should be construed to include both the singular and the plural, unless otherwise specified herein or clearly contradicted by context. The terms "comprising," "having," "including," and "containing" should be construed as open-ended (i.e., meaning "including, but not limited to") terms, unless otherwise stated. The recitation of ranges of values ​​herein is merely intended to serve as a shorthand method of individually referring to each individual value within that range, unless otherwise specified herein, and each individual value is incorporated herein as if it were individually listed. All methods described herein may be performed in any suitable order, unless otherwise specified herein or clearly contradicted by context. The use of any and all examples or exemplary language (e.g., "e.g., "etc.") provided herein is intended merely to further clarify the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.

[0076] Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations on these preferred embodiments will become apparent to those skilled in the art upon reading the foregoing description. The inventors anticipate that such variations will be utilized by those skilled in the art, and it is intended that the invention be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise specified herein or clearly contradicted by context.

Claims

1. An evaporative cooling pack in which a cooling fluid receives heat from an airflow and evaporates when the cooling fluid cools the airflow, the evaporative cooling pack comprising: A first corrugated media sheet, the first corrugated media sheet having a first plurality of groove segments, the grooves of the first plurality of groove segments being oriented at a first angle (θ １ ), the first plurality of groove segments extending at a first groove pitch (f １ ), wherein the grooves of the first plurality of groove segments have a length (d) measured parallel to the reference line; a second corrugated media sheet adjacent to the first corrugated media sheet, the second corrugated media sheet having a second plurality of groove segments, the first plurality of groove segments adjacent to the second plurality of groove segments, the grooves of the second plurality of groove segments having a second groove pitch (f ２ ), and the grooves of the second plurality of groove segments are oriented at a second angle (θ ２ ) and the second angle (θ ２ ) is the first angle (θ １ a second corrugated sheet of media different from the first corrugated sheet; and the second angle (θ ２ ) has the formula: [Equation 1] and having a minimum value determined by The first groove pitch (f １ ) to the second groove pitch (f ２ ) has the formula: [Equation 2] is determined by the reference line is parallel to a first side of the first corrugated media sheet and a first side of the second corrugated media sheet, and the first side of the first corrugated media sheet is parallel to the first side of the second corrugated media sheet; An evaporative cooling pack, wherein the first side of the first corrugated media sheet and the first side of the second corrugated media sheet form an outlet for the cooling fluid of the evaporative cooling pack.

2. The first corrugated media sheet has a third plurality of groove segments, and grooves in the third plurality of groove segments are angled at a third angle (θ ３ ) and the third angle (θ ３ ) is the first angle (θ １ ) and the second angle (θ ２ 10. The evaporative cooling pack of claim 1, wherein the evaporative cooling pack is different from the evaporative cooling pack of claim 1.

3. 3. The evaporative cooling pack of claim 2, wherein grooves of the first plurality of groove segments have an upward slope relative to the reference line and grooves of the third plurality of groove segments have a downward slope relative to the reference line.

4. The evaporative cooling pack of claim 3 , wherein the grooves of the second plurality of groove segments have an upward slope relative to the reference line.

5. 3. The evaporative cooling pack of claim 2, wherein the grooves of the first plurality of groove segments are connected to the grooves of the third plurality of groove segments to form continuous grooves, and the continuous grooves have bends where the grooves of the first plurality of groove segments connect to the grooves of the third plurality of groove segments.

6. the first corrugated media sheet has a first side, a second side, and a third side, the first side extending between the second side and the third side and perpendicular to the second side and the third side, the second side and the third side being parallel; the second corrugated media sheet has a first side, a second side, and a third side, the first side extending between the second side and the third side and perpendicular to the second side and the third side, the second side and the third side being parallel; 6. The evaporative cooling pack of claim 5, wherein the reference line is parallel to a first side of the first sheet of corrugated media and parallel to a first side of the second sheet of corrugated media.

7. the grooves of the first plurality of groove segments extend parallel to one another; The evaporative cooling pack of claim 1 , wherein the grooves of the second plurality of groove segments extend parallel to one another.

8. 3. The evaporative cooling pack of claim 2, wherein the third angle differs from the first angle in that the grooves of the first plurality of groove segments are inclined upward relative to the reference line and the grooves of the third plurality of groove segments are inclined downward relative to the reference line.

9. The third angle (θ ３ ) is the magnitude of the third angle (θ) is the magnitude of the first angle (θ １ ) in that it is greater than the magnitude of the first angle (θ １ ), the first angle (θ １ ) and the third angle (θ ３ 9. The evaporative cooling pack of claim 8, wherein both of the angles are acute.

10. the first corrugated sheet of media includes a fourth side parallel to the first side of the first corrugated sheet of media; the second corrugated media sheet includes a fourth side parallel to the first side of the second corrugated media sheet; the fourth side provides a cooling fluid inlet; the second side provides an air inlet and the third side is an air outlet; grooves of the first plurality of groove segments have an upward component extending against gravity when moving in a direction extending from the second side toward the third side; 7. The evaporative cooling pack of claim 6, wherein the grooves of the second plurality of groove segments have an upward component extending against gravity when moving in a direction extending from the second side toward the third side.

11. The evaporative cooling pack of claim 10 , wherein the grooves of the third plurality of groove segments have a downward component that extends with gravity when moving in a direction extending from the second side toward the third side.

12. grooves of the third plurality of groove segments are on the second side and do not extend to the third side; 12. The evaporative cooling pack of claim 11, wherein grooves of the first plurality of groove segments are offset from the second side and terminate at the third side.

13. 6. The evaporative cooling pack of claim 5, wherein the first plurality of groove segments are adjacent to a first portion of the second plurality of groove segments, and the third plurality of groove segments are adjacent to a second portion of the second plurality of groove segments.

14. 2. The evaporative cooling pack of claim 1, comprising a plurality of first corrugated media sheets and a plurality of second corrugated media sheets, the first corrugated media sheets and the second corrugated media sheets being stacked alternately between the first corrugated media sheets and the second corrugated media sheets.

15. 7. The evaporative cooling pack of claim 6, wherein the bend is located between the second side and the third side and defines an axis generally perpendicular to the reference line.

16. 16. The evaporative cooling pack of claim 15, wherein the axis is located closer to the third side than to the second side, and the length (d) is defined between the axis and the third side, perpendicular to the axis and the third side.

17. 1. An evaporative cooling system, comprising: a housing having a cooling fluid supply, an air inlet and an air outlet; an evaporative cooling pack according to any one of claims 1 to 16 disposed within the enclosure between the air inlet and the air outlet; wherein the grooves of the first plurality of groove segments and the grooves of the second plurality of groove segments are oriented such that air exiting the evaporated cooling fluid has an upwardly extending orientation.

18. 18. The evaporative cooling system of claim 17, wherein the cooling fluid supply is positioned such that the cooling fluid flows vertically downward through the evaporative cooling pack by gravity.

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