SE2051118A1

SE2051118A1 - Web, web matrix, and rotor for heat exchanger

Info

Publication number: SE2051118A1
Application number: SE2051118A
Authority: SE
Inventors: Eman Stanezai; Fredrik Nilsson; Johan Gidner
Original assignee: Heatex Ab
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2022-03-26
Also published as: US20220099378A1; EP3974759A1; CN114251961A

Abstract

A web (1) for transfer of thermal energy and/or moisture to and/or from a fluid. The web (1) comprises a plurality of first profiled sections (2) and a plurality of second profiled sections (3) which are configured to protrude in opposite directions, each protrusion comprising a fluid passage (4). Said first profiled sections (2) and said second profiled sections (3) form a plurality of fluid flow channels (5), each fluid flow channel (5) having a main fluid flow axis (A1) and being configured to allow fluid flow at least partially along said main fluid flow axis (A1). Each fluid flow channel (5) is formed by alternating at least one first profiled section (2) and at least one second profiled section (3) along said main fluid flow axis (A1) and by aligning said fluid passages (4) of said altematingly arranged first profiled section(s) (2) and second profiled section(s) (3). Each fluid flow channel (5) comprises at least one lateral opening (6) allowing said fluid flow to at least partially travel between adjacent fluid flow channels (5).

Description

WEB, WEB MATRIX, AND ROTOR FOR HEAT EXCHANGER TECHNICAL FIELD The disclosure relates to a Web for transfer of thermal energy and/or moisture to and/or from a ﬂuid, the Web comprising a plurality of ﬂuid ﬂoW channels.

BACKGROUND Heat exchangers are used to recycle energy from out-going gas ﬂoW to ingoing gas ﬂoWin Various applications such as Ventilation, drying, etc. A heat exchanger comprises aplurality of channels conﬁgured for ﬂuid ﬂoW, Which channels may be arranged in amatrix. Oftentimes, the inlet ﬂuid ﬂoWs in one set of channels in one direction, While the outlet fluid ﬂoWs in a different set of channels in the opposite direction.

HoWeVer, in the matrix of a rotary heat exchanger the same channels accommodate boththe inlet ﬂuid and the outlet ﬂuid. As the rotor rotates, heat is captured from the outletﬂuid in one half of a rotation cycle and released to the inlet ﬂuid during the other half ofthe rotation cycle. This allows Waste energy from the outlet ﬂuid to be transferred to thematrix, and thereafter from the matrix to the inlet ﬂuid. This increases the temperature ofthe inlet ﬂuid by an amount proportional to the temperature differential between theﬂuids and depends on the efficiency of the heat exchanger. The rotor may also be used asa desiccant Wheel Which is provided With a coating applied for the purpose of transferring humidity from one fluid to the other.The channels of the matrix of a rotary heat exchanger traditionally haVe a substantially triangular or sinusoidal shape, facilitating as much matrix surface area as possible Which can come into contact With the ﬂuids, improVing heat transfer efficiency.

HoweVer, heat exchange may be made eVen more efficient when the normally laminarﬂow of the ﬂuid is interrupted, e.g. by means of heat sinks, and some turbulence withinthe ﬂuid created. This is due to laminar ﬂow developing a boundary layer adjacent to thechannel wall which restricts heat transfer. Turbulence generates significant miXing of the boundary layer and the bulk ﬂuid, allowing highly efficient heat exchange.

SUMMARY It is an object to proVide an improved web and matrix for a heat eXchanger. Theforegoing and other objects are achieVed by the features of the independent claims.Further implementation forms are apparent from the dependent claims, the description, and the figures.

According to a first aspect, there is proVided a web for transfer of thermal energy and/ormoisture to and/or from a ﬂuid, the web comprising a plurality of first profiled sectionsand a plurality of second profiled sections, the first profiled sections and the secondprofiled sections being configured to protrude in opposite directions from a main plane ofthe Web, each protrusion comprising a ﬂuid passage, the first profiled sections and thesecond profiled sections forming a plurality of ﬂuid ﬂow channels, each ﬂuid ﬂowchannel haVing a main ﬂuid ﬂow aXis and being conﬁgured to allow fluid ﬂow at leastpartially along the main ﬂuid ﬂow axis, each ﬂuid ﬂow channel being formed byalternating at least one first profiled section and at least one second proﬁled section alongthe main ﬂuid ﬂow axis and by aligning the ﬂuid passages of the alternatingly arrangedfirst profiled sections and second profiled sections, each ﬂuid ﬂow channel comprising atleast one lateral opening allowing the ﬂuid flow to at least partially traVel between adjacent ﬂuid flow channels.A web like the one described aboVe comprises as few parts as possible, dispensing of the need for separate distancing components such as spacers. This not only reduces material costs but also facilitates assembly and allows for a more compact heat exchanger, when O3240-SE-P lO Winding the Web into a spiral or stacking several Webs on top of each other, forming aheat exchanger comprising multiple layers of Webs and hence ﬂuid ﬂoW channels.Furthermore, this specific Web provides an as large surface area, i.e. energy transfer area,as possible While also allowing the laminar ﬂoW of the ﬂuid passing through each ﬂuidﬂoW channel to be interrupted, by a lateral opening in the channel Wall, and someturbulence to be created Within the ﬂuid. This significantly improVes the energy transferrate of the Web, as Well as the moisture transfer rate, as the sloW-moVing boundary layeris broken.

In a possible implementation form of the first aspect, the first profiled sectionsprotruding in a first direction perpendicular to the main plane, the second profiledsections protruding in a second direction opposite to the first direction, such that the profiled sections together form both spacers as Well as a ﬂuid ﬂoW channel.

In a further possible implementation form of the first aspect, the main ﬂuid ﬂoW aXeseXtending in parallel With each other and With the main plane. This facilitates haVing onlyone common inlet side and one common outlet side in the heat exchanger comprising the Web.

In a further possible implementation form of the first aspect, a ﬂuid outlet end of the firstprofiled section is arranged adjacent a ﬂuid inlet end of an adjacent second profiledsection, and/ or Wherein a fluid inlet end of the first profiled section is arranged adjacent aﬂuid outlet end of an adjacent second profiled section, the ﬂuid passage of the firstprofiled section eXtending from the ﬂuid inlet end to the ﬂuid outlet end along the mainﬂuid ﬂoW axis, and the ﬂuid passage of the second profiled section extending from the ﬂuid inlet end to the ﬂuid outlet end along the main fluid ﬂoW aXis.

In a further possible implementation form of the first aspect, the ﬂuid ﬂoW can deViatefrom the main ﬂuid ﬂoW aXis as it exits the ﬂuid outlet end of the first profiled section ofthe ﬂuid ﬂoW channel, and traVel into the ﬂuid passage of the second profiled section of an adjacent ﬂuid ﬂoW channel, and/ or the ﬂuid ﬂoW can deViate from the main ﬂuid ﬂoW O3240-SE-P lO axis as it exits the ﬂuid outlet end of the second profiled section of the ﬂuid ﬂow channel,and travel into the ﬂuid passage of the first profiled section of an adjacent ﬂuid ﬂowchannel. This way, an opening in the channel Wall, i.e. an interruption affecting thelaminar ﬂow of ﬂuid, is formed at each transition between a first profiled section and a second profiled section, allowing for more efficient heat exchange.

In a further possible implementation form of the first aspect, the first profiled sectionsand the second profiled sections of each ﬂuid ﬂow channel haVe identical shape, an axisof symmetry of the first profiled sections extending coaxially with an axis of symmetry ofthe second profiled sections, and extending in parallel with the main ﬂuid ﬂow axis of theﬂuid ﬂow channel. This simplifies the manufacture of the web, since only one shape, though inVerted, must be achieVed.

In a further possible implementation form of the first aspect, the first profiled sectionsand the second profiled sections haVe different cross-sectional shapes as seen in a planeperpendicular to the main ﬂuid ﬂow axis and to the main plane, increasing the ﬂexibilityof the web. For example, the height of each profiled section can be selected to proVidegreater or lesser spacing between adjacent webs of a matrix, thereby establishing adesired surface area density of the matrix. This implementation form allows the heatexchange matrix to be customized by using two different proﬁled sections of differentsurface area densities. Furthermore, the height of the profiled sections determines theextent of separation between adjacent webs and, hence, determines the diameter of theﬂuid ﬂow channel, the surface area density, and subsequently the airﬂow Versus pressure drop relationship, for the matrix.

In a further possible implementation form of the first aspect, the first profiled section andthe second profiled section each comprises an apex and a base, the apex of the firstprofiled section and the base of the second profiled section being arranged at one side ofthe main plane, and the base of the first profiled section and the apex of the second profiled section being arranged at an opposite side of the main plane.

O3240-SE-P lO The distance between apex and base, i.e. the height of the profiled section can be selectedto provide greater or lesser spacing between adjacent webs, thereby providing a desired surface area density.

In a further possible implementation form of the first aspect, the apeX of the first profiledsection and the base of the second profiled section are arranged in a first common plane,and the base of the first profiled section and the apex of the second profiled section arearranged in a second common plane. This allows for a symmetrical web that is easy to manufacture and assemble into a matrix.

In a further possible implementation form of the first aspect, the first profiled section andthe second profiled section comprise a strip of web material. By diViding a web materialinto a plurality of strips, a simple way of manufacturing a web, haVing aligned ﬂuid flow channels as well as lateral openings between adjacent ﬂuid ﬂow channels, is facilitated.

In a further possible implementation form of the first aspect, the shape substantially corresponds to one period of a sine waVe.

In a further possible implementation form of the first aspect, the apeX corresponds to a crest of the sine waVe, and the base corresponds to two troughs of the sine waVe.

In a further possible implementation form of the first aspect, the first profiled section andthe second profiled section each comprises at least one stepped part, the stepped part ofthe first profiled section extending adjacent the stepped part of an adjacent secondprofiled section. The stepped parts proVide stability to the web as well as an increase in surface areas of each ﬂuid flow channel.

In a further possible implementation form of the first aspect, the stepped parts of the firstprofiled sections extend coplanar with the stepped parts of the second profiled sections.The stepped parts proVide larger coherent surface sub-areas within each ﬂuid ﬂow channel.

O3240-SE-P lO In a further possible implementation form of the ﬁrst aspect, the stepped part is arranged equidistantly between the apex and the base, facilitating a symmetric web.

In a further possible implementation form of the first aspect, the web comprises a webmaterial such as polymer, steel, or aluminum foil, and, optionally, a hygroscopic or epoxycoating. This allows the web to be thin, lightweight, and to serve for the transfer of moisture in addition to transfer of energy.

According to a second aspect, there is provided a web matrix for transfer of thermalenergy and/or moisture to and/or from a ﬂuid, the matrix comprising a plurality of websaccording to the above, the webs being superimposed onto each other such that the main ﬂuid ﬂow axes of the webs extend in parallel.

The provision of protruding sections allows the webs of the matrix to be stacked withoutrequiring separate distancing components such as spacers, since each protrusion provides both a ﬂuid channel and vertical separation.

In a possible implementation form of the second aspect, the web matrix further comprisesat least one integral sheet material, each sheet material being arranged between two adjacent webs. The integral sheet material provides separation between adjacent webs.

In a further possible implementation form of the second aspect, each sheet material isconfigured to support the apexes of the first profiled sections and the bases of the secondprofiled sections, or to support the apexes of the second profiled sections and the apexes of the second profiled sections.In a further possible implementation form of the second aspect, the apex and/or the base of the first profiled sections and/or the second profiled sections of the webs are fixedly attached to the sheet material.

O3240-SE-P lO According to a third aspect, there is provided a rotor for a heat exchanger comprising thematrix according to any one of claims 10 to 12, a rotation aXis of the rotor eXtending inparallel With the main ﬂuid ﬂoW aXes of the Webs of the matrix. Such a solutionfacilitates not only a rotor having improved energy transfer rates as Well as improvedmoisture transfer rates, but also enables considerable savings of material in the manufacture of the rotor.

In a possible implementation form of the third aspect, each ﬂuid ﬂoW channel of the Websis conf1gured to accommodate bidirectional ﬂuid ﬂoW at least partially along the mainﬂuid ﬂoW axis, the ﬂuid ﬂoWing in a first direction, along the main ﬂuid ﬂoW aXis, Withina rotor section When the rotor section is in a first angular position, the ﬂuid ﬂoWing in asecond, opposite direction, along the main ﬂuid flow axis, Within the rotor section When the rotor section is in a second angular position.

In a further possible implementation form of the third aspect, the rotor is conﬁgured for air-to-air heat transfer.

In a further possible implementation form of the third aspect, the rotor is conﬁgured for air-to-liquid.

According to a fourth aspect, there is provided a rotary heat exchanger comprising therotor according to the above. This solution facilitates not only a heat eXchanger havingimproved energy transfer rates as Well as improved moisture transfer rates, but also enables considerable savings of material in the manufacture of the heat exchanger.

In a possible implementation form of the fourth aspect, the rotary heat exchanger is configured for use in ventilation systems.

This and other aspects Will be apparent from the embodiments described below.

O3240-SE-P lO BRIEF DESCRIPTION OF THE DRAWINGS In the following detailed portion of the present disclosure, the aspects, embodiments, andimplementations will be explained in more detail with reference to the example embodiments shown in the drawings, in which: Fig. 1 shows a perspective view of a web in accordance with one embodiment of the present invention; Fig. 2 shows a cross-sectional side view of the embodiment shown in Fig 4; Fig. 3 shows a partial perspective view of a web in accordance with one embodiment of the present invention; Figs. 4a to 4c show cross-sectional side views of webs in accordance with one embodiment of the present invention; Fig 5. shows a cross-sectional side view of a prof1led section of the embodiment shown in Fig 4c; Fig. 6 shows a partial perspective view of a heat exchanger comprising a rotor and a matrix in accordance with one embodiment of the present invention.

DETAILED DESCRIPTION Fig. 6 shows a rotary heat exchanger 13 comprising a rotor 12, which rotary heatexchanger 13 may be configured for use in e.g. ventilation systems. The rotor 12 may beconﬁgured for air-to-air heat transfer, air-to-liquid heat transfer, or liquid-to-liquid heat transfer. Furthermore, the rotor 12 may be configured for moisture transfer.

O3240-SE-P lO The rotor 12 comprises a web matrix 10 comprising a plurality of webs 1, described inmore detail further below. The rotation aXis A4 of the rotor 12 eXtends in parallel with the main ﬂuid ﬂow aXes A1 of the webs 1 of the web matrix 10, as indicated in Fig. 6.

The webs 1 comprise a plurality of ﬂuid ﬂow channels 5 which are conﬁgured toaccommodate bidirectional ﬂuid ﬂow at least partially along the main ﬂuid ﬂow aXis A1.By bidirectional is meant that the ﬂuid ﬂows in a first direction D3 along the main ﬂuidﬂow aXis A1 of a ﬂuid ﬂow channel 5 arranged within a specific rotor section, when therotor section is momentarily in a first angular position R1. Correspondingly, the ﬂuidﬂows in a second, opposite direction D4 along the same main ﬂuid ﬂow axis A1, whenthe same rotor section is momentarily in a second angular position R2. The first angularposition R1 may for example be any position in the upper 180° of one revolution of therotor 12 around the rotation aXis A4, and the second angular position R2 may be any position in the lower 180° of the revolution.

Figs. 1 and 2 show an embodiment of the aboVe-mentioned web 1, the web 1 beingconfigured for transfer of thermal energy and/or moisture to and/ or from the ﬂuid passing therethrough. The ﬂuid may be air, water, or any suitable gas.

The web 1 comprises a plurality of first profiled sections 2 and a plurality of secondprofiled sections 3. The first profiled sections 2 and the second profiled sections 3 areconfigured such that they protrude in opposite directions from the main plane P1 of theweb 1. Each protrusion forms a ﬂuid passage 4, in other words, the first profiled sections2 and the second profiled sections 3 are shaped such that they extend in opposite directions, and a ﬂuid passage 4 being created by and within this protrusion.

The first profiled sections 2 and the second profiled sections 3 together form a plurality ofﬂuid flow channels 5. Each ﬂuid flow channel 5 has a main ﬂuid flow aXis A1 and isconfigured to allow ﬂuid flow at least partially along the main ﬂuid flow axis A1, in firstdirection D3 and second direction D4. The plurality of ﬂuid flow channels 5 within one web 1 is arranged such that they eXtend substantially in parallel, i.e. the main ﬂuid ﬂow O3240-SE-P lO lO aXes A1 of the ﬂuid ﬂow channels 5 are parallel with each other, within the main planeP1. The main plane P1 may be planar, e.g. when the web 1 is used in the matrix of a plateheat exchanger, or curVed, e.g. when the web 1 is used in the matrix of a rotary heat eXchanger 13.

Each ﬂuid flow channel 5 is formed by alternating at least one first profiled section 2 andat least one second profiled section 3 along the main ﬂuid ﬂow axis A1, such that eVerysecond section is a first profiled section 2 and eVery second profile is a second profiledsection 3. The first profiled sections 2 protrude in a first direction D1 which isperpendicular to the main plane P1, and the second profiled sections 3, correspondingly,protrudes in a second direction D2 opposite to the first direction D1, as illustrated in Fig.2. The ﬂuid passages 4 of the alternatingly arranged first profiled sections 2 and secondprofiled sections 3 are aligned such that a ﬂuid ﬂow channel 5 is formed by this pluralityof aligned ﬂuid passages 4.

By alternating first profiled sections 2 and second profiled sections 3, a ﬂuid outlet end2b of a first profiled section 2 may be arranged adjacent a ﬂuid inlet end 3a of an adjacentsecond profiled section 3, and/or a ﬂuid inlet end 2a of a first profiled section 2 may bearranged adjacent a ﬂuid outlet end 3b of an adjacent second profiled section 3. The ﬂuidpassage 4 of the first profiled section 2 extends from the ﬂuid inlet end 2a to the ﬂuidoutlet end 2b, of the first profiled section 2, along main ﬂuid ﬂow aXis A1. The ﬂuidpassage 4 of the second profiled section 3 extends from the ﬂuid inlet end 3a to the ﬂuid outlet end 3b, of the second profiled section 3, along main ﬂuid ﬂow axis A1.

Each ﬂuid ﬂow channel 5 comprises at least one lateral opening 6 allowing the ﬂuid ﬂowto at least partially traVel between adjacent ﬂuid ﬂow channels 5, and not only along themain ﬂuid ﬂow aXis A1. A lateral opening 6 may be formed at each transition between a first profiled section 2 and a second profiled section 3, as shown in Figs. 1 and 3.

The ﬂuid ﬂow may deViate from the main ﬂuid flow axis A1, i.e. traVel through a lateral opening 6, as it exits the ﬂuid outlet end 2b of a first profiled section 2 of a ﬂuid ﬂow O3240-SE-P lO ll channel 5a, and travel into the ﬂuid passage 4 of a second profiled section 3 of anadjacent ﬂuid ﬂoW channel 5b. Correspondingly, the ﬂuid ﬂoW may deViate from themain ﬂuid ﬂoW axis A1, i.e. travel through a lateral opening 6, as it exits a ﬂuid outletend 3b of a second profiled section 3 of a ﬂuid ﬂoW channel 5a, and traVel into the ﬂuid passage 4 of a first profiled section 2 of an adjacent ﬂuid ﬂoW channel 5b.

The first profiled sections 2 and the second profiled sections 3 of each ﬂuid ﬂoW channel5 may haVe identical shapes, as illustrated in Fig. 2 and Figs. 4a and 4c. In this case, theaXis of symmetry A2 of the first profiled sections 2 may eXtend coaXially With the aXis ofsymmetry A3 of the second profiled sections 3. The axes of symmetry A2, A3 extend inparallel With the main ﬂuid ﬂoW axis A1 of the ﬂuid ﬂoW channel 5. NeVertheless, thefirst profiled sections 2 and the second profiled sections 3 may also be offset relatiVe toeach other, in the first or second directions D1, D2 (Vertically or radially) or in a direction Within the main plane P1 (horizontally or circumferentially).

Furthermore, the first profiled sections 2 and the second profiled sections 3 may haVedifferent cross-sectional shapes as seen in a plane P2 perpendicular to the main ﬂuid ﬂoWaxis A1 and to the main plane P1. The aXes of symmetry A2, A3 may, in this case, eXtend either coaxially or in parallel.

As illustrated in Fig. 2, the first profiled section 2 and the second profiled section 3 mayeach comprise an apeX 7 and a base 8. The apeX 7 of the first profiled section 2 and thebase 8 of the second profiled section 3 are arranged at one side of the main plane P1, and the base 8 of the first profiled section 2 and the apex 7 of the second profiled section 3 arearranged at the opposite side of the main plane P1. The apeX 7 of the first profiled section2 and the base 8 of the second profiled section 3 may be arranged in a first common planeP3, and the base 8 of the first profiled section 2 and the apex 7 of the second profiledsection 3 may be arranged in a second common plane P4. One or seVeral of the apexes 7and the bases 8 may also be arranged With some Vertical offset, such that they do notextend in a common plane. In other Words, the cross-sectional shapes of the first profiled section 2 and the second profiled section 3 may substantially correspond to a period of a O3240-SE-P lO 12 sine waVe. The apex 7 may correspond to a crest of the sine waVe, and the base 8 maycorrespond to two troughs of the sine waVe. The cross-sectional shapes of the firstprofiled section 2 and the second profiled section 3 may also substantially correspond to aperiod of a square waVe, a triangular waVe, a sawtooth waVe or any other suitable periodic waVe.

The first profiled section 2 and the second profiled section 3 may be shaped such thatthey haVe substantially identical apeXes 7 and bases 8. This is illustrated in Figs. 4a to 4c,which show different embodiments of the first profiled section 2 and the second profiledsection 3. The cross-sectional shapes of the first profiled section 2 and the second profiledsection 3 may correspond to a period of a sine waVe, wherein eVery second apex 7 ofeach profile 2, 3 corresponds to a crest of the sine waVe, and eVery second apex 7 corresponds to the trough of the sine waVe, as shown in Figs. 4a and 4bc.

The first profiled section 2 and the second profiled section 3 may also haVe complexperiods as shown in Figs. 4c and 5. For example, the first profiled section 2 and thesecond profiled section 3 may be shaped such that they haVe a waVe-shape which is notpurely sinusoidal, but which e.g. may comprise flat areas such as ﬂat apexes 7 and flat bases 8.

The first profiled section 2 and the second profiled section 3 may each comprise at leastone stepped part 9. As shown in Fig. 2, each first profiled section 2 and each secondprofiled section 3 may comprise two preferably coplanar stepped parts 9. As shown inFig. 5, each first profiled section 2 and each second profiled section 3 may comprise onestepped part 9. The stepped part 9 of the first profiled section 2 may extend adjacent thestepped part 9 of an adjacent second profiled section 3. The stepped parts 9 may bearranged coplanar with, or at an angle to, the main plane Pl. The stepped parts 9 of thefirst profiled section 2 may eXtend coplanar with the stepped parts 9 of the secondprofiled section 3. Furthermore, the stepped part 9 may be arranged equidistantly betweenthe apeX 7 and the base 8 of a section, i.e. at a Vertical center point of the ﬂuid ﬂow channel 5.

O3240-SE-P lO 13 The first profiled section 2 and the second profiled section 3 may each comprise a strip ofweb material. The web material may be one integral piece of sheet material, into whichparallel, throughgoing slits are cut and strips are formed by the material located betweentwo such adjacent slits. A number of profiled sections may be formed by one suchintegral piece of material, as suggested in Figs. 4a to 5. A profiled section is formed byallowing the strip to protrude in direction D1 or direction D2. The slits preferably extend in parallel with each other and perpendicular to the main ﬂuid flow axis A1.

The web 1 may comprise a web material such as polymer, steel, or aluminum foil, and, optionally, be coVered by a hygroscopic or epoxy coating.

The present inVention also relates to a web matrix 10 for transfer of thermal energyand/or moisture to and/or from a ﬂuid. The web matrix 10 comprises a plurality of webs 1which are superimposed onto each other such that the main ﬂuid flow axes A1 of the webs 1 extend in parallel. This is illustrated schematically in Fig. 6.

As shown in Fig. 3, the web matrix 10 may further comprise at least one integral sheetmaterial 11, each sheet material 11 being arranged between two adjacent webs 1. Eachsheet material 11 may be configured to support the apexes 7 of the f1rst profiled sections2 and the bases 8 of the second profiled sections 3, or alternately, support the apexes 7 of the second profiled sections 3 and the apexes 7 of the second profiled sections 3.

The apex 7 and/or the base 8 of the first profiled sections 2 and/or the second profiledsections 3 of the webs 1 may be f1xedly attached to the sheet material 11, e.g. by means of adhesiVe such as glue, or may be non-fixed in relation to the sheet material 11.

The Various aspects and implementations haVe been described in conjunction withVarious embodiments herein. HoweVer, other Variations to the disclosed embodiments canbe understood and effected by those skilled in the art in practicing the claimed subject-matter, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the 03240-SE-P lO 14 CC 99 indef1nite article a or "an" does not eXclude a plurality. The mere fact that certainmeasures are recited in mutually different dependent claims does not indicate that a combination of these measured cannot be used to advantage.

The reference signs used in the claims shall not be construed as limiting the scope. Unlessotherwise indicated, the drawings are intended to be read (e.g., cross-hatching,arrangement of parts, proportion, degree, etc.) together With the specification, and are tobe considered a portion of the entire Written description of this disclosure. As used in thedescription, the terms "horizontal", "Vertical", "left", "right", "up" and "doWn", as Wellas adjectiVal and adVerbial deriVatiVes thereof (e.g., "horizontally", "rightWardly","upWardly", etc.), simply refer to the orientation of the illustrated structure as theparticular draWing f1gure faces the reader. Similarly, the terms "inWardly" and "outWardly" generally refer to the orientation of a surface relatiVe to its aXis of elongation, or aXis of rotation, as appropriate.

O3240-SE-P

Claims

1. A Web (1) for transfer of thermal energy and/ or moisture to and/or from a ﬂuid, said Web (1) comprising a plurality of first prof1led sections (2) and a plurality of secondprofiled sections (3), said first profiled sections (2) and said second profiled sections (3) being configured toprotrude in opposite directions from a main plane (P1) of said Web (1), each protrusion comprising a ﬂuid passage (4), said f1rst profiled sections (2) and said second profiled sections (3) forming a plurality ofﬂuid ﬂoW channels (5), each ﬂuid ﬂoW channel (5) haVing a main ﬂuid ﬂoW aXis (A1)and being conﬁgured to allow ﬂuid ﬂoW at least partially along said main ﬂuid ﬂoW aXis (A1), each ﬂuid ﬂoW channel (5) being formed by alternating at least one first prof1led section(2) and at least one second profiled section (3) along said main ﬂuid ﬂoW axis (A1) andby aligning said ﬂuid passages (4) of said alternatingly arranged first prof1led section(s) (2)and second profiled section(s) (3), each ﬂuid ﬂoW channel (5) comprising at least one lateral opening (6) allowing said ﬂuid ﬂoW to at least partially traVel between adjacent ﬂuid ﬂoW channels (5).

2. The Web (1) according to claim 1, Wherein a ﬂuid outlet end (2b) of said first prof1ledsection (2) is arranged adjacent a ﬂuid inlet end (3a) of an adjacent second prof1ledsection (3), and/or Wherein a ﬂuid inlet end (2a) of said first prof1led section (2) is arranged adjacent a ﬂuid outletend (3b) of an adjacent second profiled section (3), O3240-SE-P lO 16 said ﬂuid passage (4) of said first profiled section (2) extending from said ﬂuid inlet end(2a) to said ﬂuid outlet end (2b) along said main ﬂuid flow aXis (Al), andsaid ﬂuid passage (4) of said second profiled section (3) extending from said ﬂuid inlet end (3a) to said ﬂuid outlet end (3b) along said main ﬂuid ﬂoW axis (A1).

3. The Web (1) according to claim 2, Wherein said ﬂuid ﬂoW can deViate from said main ﬂuid ﬂoW aXis (Al) as it exits said ﬂuid outletend (2b) of said first profiled section (2) of said ﬂuid flow channel (5 a), and travel into said ﬂuid passage (4) of said second profiled section (3) of an adjacent ﬂuidﬂoW channel (5b), and/or said ﬂuid ﬂoW can deViate from said main ﬂuid ﬂoW aXis (Al) as it exits said ﬂuid outletend (3b) of said second profiled section (3) of said ﬂuid ﬂoW channel (5 a), and traVel into said ﬂuid passage (4) of said first profiled section (2) of an adjacent ﬂuid ﬂoWchannel (5b).

4. The Web (1) according to any one of the previous claims, Wherein said first profiled section(s) (2) and said second profiled section(s) (3) of each ﬂuid ﬂoWchannel (5) haVe identical shape, an axis of symmetry (A2) of said first profiled section(s) (2) extending coaXially With anaxis of symmetry (A3) of said second profiled section(s) (3), and eXtending in parallel With said main ﬂuid ﬂoW aXis (Al) of said ﬂuid ﬂoW channel (5).

5. The Web (1) according to claim 3, Wherein said first profiled section (2) and saidsecond profiled section (3) each comprise an apex (7) and a base (8), said apex (7) of saidfirst profiled section (2) and said base (8) of said second profiled section (3) beingarranged at one side of said main plane (Pl), and said base (8) of said first profiled section (2) and said apex (7) of said second profiled section (3) being arranged at an opposite side of said main plane (Pl). O3240-SE-P lO 17

6. The Web (1) according to claim 5, wherein said apex (7) of said first profiled section(2) and said base (8) of said second profiled section (3) are arranged in a f1rst commonplane (P3), and said base (8) of said first profiled section (2) and said apex (7) of said second profiled section (3) are arranged in a second common plane (P4).

7. The web (1) according to claim 6 or 7, wherein said first profiled section (2) and saidsecond profiled section (3) each comprise at least one stepped part, said stepped part (9)of said first profiled section (2) extending adjacent said stepped part (9) of an adjacent second profiled section (3).

8. The web (1) according to claim 7, wherein said stepped part(s) (9) of said first profiledsection(s) (2) extend coplanarly with said stepped part(s) (9) of said second profiledsection(s) (3).

9. The web (1) according to any one of the previous claims, wherein said web (1)comprises a web material such as polymer, steel, or aluminum foil, and, optionally, a hygroscopic or epoxy coating.

10. A web matrix (10) for transfer of thermal energy and/or moisture to and/or from aﬂuid, said web matrix (10) comprising a plurality of webs (1) according to any one ofclaims 1 to 9, said webs (1) being superimposed onto each other such that the main ﬂuid flow axes (A1) of said webs (1) extend in parallel.

11. The web matrix (10) according to claim 10, further comprising at least one integral sheet material (11), each sheet material (11) being arranged between two adjacent webs (1). O3240-SE-P lO 18

12. The Web matrix (10) according to claim 10 or 11, Wherein the apex (7) and/or thebase (8) of the f1rst prof1led sections (2) and/or the second prof1led sections (3) of saidWebs (1) are f1xedly attached to said sheet material (11).

13. A rotor (12) for a heat exchanger comprising the Web matrix (10) according to anyone of claims 10 to 12, a rotation axis (A4) of said rotor (12) extending in parallel With the main ﬂuid ﬂoW axes (A1) of the Webs (1) of said Web matrix (10).

14. The rotor (12) according to claim 13, Wherein each ﬂuid ﬂoW channel (5) of saidWebs (1) is configured to accommodate bidirectional ﬂuid ﬂoW at least partially alongsaid main ﬂuid ﬂoW axis (A1), said ﬂuid ﬂowing in a first direction (D3), along said main ﬂuid ﬂoW axis (A1), Within arotor section When said rotor section is in a f1rst angular position (R1), said ﬂuid ﬂowing in a second, opposite direction (D4), along said main ﬂuid ﬂoW axis(A1), Within said rotor section When said rotor section is in a second angular position (R2).

15. The rotor (12) according to claim 13 or 14, Wherein said rotor (12) is conﬁgured for air-to-air heat transfer.

16. A rotary heat exchanger (13) comprising the rotor (12) according to any one of claims 13 to 15. 03240-SE-P