Heat exchanger element and method for the production

Abstract

To provide heat exchanger elements which allow the creation of Enthalpy exchangers whereby the efficiency of sensible energy exchange and latent energy exchange can be varied and controlled and especially improved, a method for the production of heat exchanger elements is provided including a) producing a plate element with defined outer dimensions and corrugations in the area within a border, b) perforating the plate in predefined areas and in predefined dimensions, c) filling the perforations with a polymer with latent energy recovery capability and d) curing the polymer.

Claims

1. A method for the production of heat exchanger elements of a type for use in a residential or commercial total energy exchanger comprising: a) producing a plate element with defined outer dimensions and corrugations in the area within a border, wherein the plate element is made from a material having sensible energy recovery capability; b) perforating the plate in predefined areas and in predefined dimensions, wherein said perforated area provides a plurality of holes allowing the water vapor to migrate from one side of the plate material to the other side; c) filling the perforations with a polymer with latent energy recovery capability, the filling being performed while the polymer is in a dissolved state, the polymer being selected to provide latent energy recovery of a residential or commercial space during a ventilation process where stale exhaust air and incoming fresh air travel through the heat exchanger; and d) curing the polymer onto the plate for forming a polymer layer within the perforations; wherein the polymer is a sulfonated block copolymer and the heat exchanger element is configured for placement in a total energy recovery ventilator (ERV), whereby the heat exchanger element exchanges heat as well as moisture with respect to air that flows in contact with the heat exchanger element.

2. The method according to claim 1, wherein the plate is aluminum.

3. The method according to claim 1, wherein the plate is plastic.

4. The method according to claim 1, wherein the plate is stamped.

5. The method according to claim 1, wherein the plate element has a first face and an opposite second face, wherein the corrugations are formed in one direction only along the first face, while being open along the opposing second face, wherein the plate element comprises a single layer structure.

6. The method according to claim 1, wherein the plate is molded.

7. The method according to claim 1, wherein the plate is perforated by a needle-roller process.

8. The method according to claim 1, wherein the perforation is formed during formation of the plate element.

9. A heat exchanger element comprising a plate element with defined outer dimensions and corrugations to increase the exchange surface in the area within a border, said border being defined by a peripheral rim that extends completely around the area containing the corrugations, the peripheral rim including a first portion that is open along a corresponding edge of the plate and defines one of an inlet and an outlet of a flow channel, the first portion lying in a different plane relative to adjacent portions of the peripheral rim so as to represent a locally deformed area of the peripheral rim, said inlet or outlet of the flow channel being spaced from the corrugations and is therefore only defined by a non-corrugated portion of the plate, the plate element being further defined by a first face and a second face, said plate element being made from a material having sensible energy recovery capability, and said plate element has perforations in predefined first areas and in predefined dimensions, each perforated area providing a plurality of perforations, each perforation being made so as to extend from the first face to the second face, said perforations being filled with a polymer with latent energy recovery capability, wherein the polymer comprises a sulfonated block copolymer that has a water vapor transmission rate suitable for use in a total energy recovery ventilator (ERV).

10. The heat exchanger element according to claim 9, wherein the perforations are small holes.

11. The heat exchanger element according to claim 10, wherein the perforated areas sum up to 70% of the total surface of the plate element.

12. The heat exchanger element according to claim 9, wherein the plate element has a border which allows a gastight connection to another similar plate element.

13. The heat exchanger element according to claim 9, wherein the plate element has corrugations increasing the exchange surface up to 100% relative to the exchange surface of a non-corrugated plate element.

14. The heat exchanger element according to claim 9, wherein the corrugations are oriented to guide a fluid flow.

15. The heat exchanger with at least three plates like heat exchanger elements fixed to each other in parallel orientation to form two fluid paths allowing fluids to flow there through, wherein the plate like heat exchanger elements are elements according to claim 9.

16. A method for the production of an energy recovery ventilator (ERV) that is defined by a plurality of heat exchanger elements comprising: a) producing a plurality of plate elements, each plate element having defined outer dimensions and corrugations in the area within a border that extends completely around the area containing the corrugations, wherein the plate element is made from a material having sensible energy recovery capability, wherein the entire border is free of corrugations and defines free edges of the plate element; b) perforating the plate in predefined areas within the border and in predefined dimensions and locations, wherein said perforated area provides a plurality of holes; c) filling the perforations with a polymer with high latent energy recovery capability, the filling being performed while the polymer is in a dissolved state and by a technique that results in the polymer being directed into the perforations, wherein said plurality of holes when filled with the polymer allows the water vapor to migrate from one side of the plate material to the other side; d) curing the polymer onto the plate for forming a polymer layer within the perforations; and e) combining the plurality of plate elements in stack form to define the energy recovery ventilator that is configured for residential and commercial applications to receive both exhaust air and incoming air, wherein the plurality of plate elements are constructed to act upon both the exhaust air and the incoming air by heat and moisture exchange therebetween.

17. The method of claim 16, wherein the technique comprises serigraphy.

18. The method of claim 16, wherein the technique comprises dipping or spraying.

19. A method for the production of heat exchanger elements comprising: a) identifying environmental conditions in which the heat exchanger elements are to be placed for use; b) producing a plate element that is made from a material having sensible energy recovery capability; c) selectively perforating the plate in predefined areas and in predefined dimensions, wherein said perforated area is selected based upon the environmental conditions and provides a plurality of holes allowing the water vapor to migrate from one side of the plate material to the other, wherein the plurality of holes are arranged in a first pattern for use in first environmental conditions and are arranged in a second pattern for use in second environmental conditions different than the first environmental conditions, the first pattern being different than the second pattern; d) individually filling the perforations with a polymer with latent energy recovery capability characterized by high water vapor transmission rate, the filling being performed while the polymer is in a dissolved state, wherein the polymer comprises a sulfonated block copolymer; and e) curing the polymer so as to form a plurality of discrete polymer micro membranes located within corresponding perforations of the plate elements; wherein the heat exchanger element is configured for placement in an energy recovery ventilator (ERV) and is constructed to act upon both incoming air and exhaust air, by heat and moisture exchange therebetween, depending upon environmental conditions.

20. The method of claim 19, wherein the plate element is defined by a first face and a second face, each perforation being open along the first face and the second face prior to the step of filling the perforations.

21. The method of claim 19, wherein the plate element further includes corrugations in any areas within a border of the plate element.

22. The method of claim 19, wherein the plate element is plastic and the polymer is a sulfonated block copolymer.

23. The method of claim 21, wherein the corrugations are formed using a thermos/vacuum forming process.

24. The method of claim 16, wherein the border includes opposing free ends of the plate element that lie within the same plane and are configured to sealingly seat against an adjacent plate.

25. The method of claim 1, wherein the plate element is configured to operate in conditions below a freezing point of water without ice buildup by selecting a pattern and locations for the perforations formed in the plate element and by selecting the polymer in view of these operating conditions.

26. The method of claim 1, wherein the polymer further includes an anti-bacterial additive.

27. The method of claim 1, wherein the sulfonated block copolymer has at least one end block A, which is resistant to sulfonation, and at least one interior block B, which is susceptible to sulfonation.

Description

(1) Further features and aspects of the invention become obvious from the following description of the drawings. The drawings show:

(2) FIG. 1 a top view of one example for an embodiment of an exchanger plate according to the invention and

(3) FIG. 2 a side view of the plate according to FIG. 1.

(4) In the drawings, the same elements are designated by the same reference numbers.

(5) An exchanger plate 1 consists of a structural rigid plate 2 made from aluminium, plastic or the like. Plate 2 has a rim 4 which is a flat sealable rim and can be deformed for sealing. Areas of the rim 4 are opened or deviated as shown by reference no. 5 to define e. g. a inlet and outlet of a flow channel.

(6) Within the rim area, corrugations 3 are stamped or embossed into the plate 2. When similar plates are sealed together, flow channels are defined. In the example, reference no. 5 designates areas with perforations.

(7) For the purpose of clarity, only some of the perforation areas 6 and some of the corrugated areas 3 are designated.

(8) The heat exchanger element 1 shows a great surface for heat exchange which is increased by the corrugations 3 which are corrugated in one direction only and open on the other surface. Furthermore, the perforated areas 6 define a latent energy exchange area for the transfer of moisture.

(9) These plates will be stacked to build a heat exchanger e. g. for ventilation systems to exchange heat from outgoing to incoming air (or vice versa for free cooling in summer) as well as humidity from outgoing to incoming air in winter (or vice versa for moisture reduction in summer or ail year round in hot and humid climatic zones).

(10) The drawings and the description do in no way restrict the invention and are meant for describing an example, only.

REFERENCE NUMERALS

(11) 1 heat exchanger element 2 plate 3 corrugation 4 border 5 opened border 6 perforations