Enthalpy exchanger element and method for the production
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Solution Overview
Problem
Existing enthalpy exchangers compromise on sensible energy exchange to improve latent energy exchange due to the selective characteristics of currently used membranes, limiting their efficiency in both energy recovery types.
Innovation Solution
The use of metal foil plates, preferably aluminum, with a perforated and embossed design, combined with a sulfonated copolymer polymer film, allows for adjustable and enhanced sensible and latent energy exchange by optimizing the plate's structural strength and surface area for energy transfer, while maintaining a gastight connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If membrane materials are selected for latent energy exchange, then latent energy transfer capability is improved, but structural strength and sensible energy transfer deteriorate
Solution Approach 1:
The plate is divided into functional zones where the first area maintains a solid perforated structure for structural strength and sensible heat transfer, while the second area incorporates desiccant coating for latent energy transfer. This segmentation prevents the entire structure from being compromised by membrane material limitations.
Solution Approach 2:
The plate combines different materials in distinct areas: a structurally strong material (such as metal or rigid polymer) with perforations in the first area, and desiccant-impregnated material in the second area. This composite approach allows the structure to maintain strength while enabling latent energy transfer where needed.
2Loss of energy
If perforations are added to metal foil plates to enhance sensible energy exchange, then sensible energy exchange efficiency is improved, but structural integrity and moisture transfer capability deteriorate
Solution Approach 1:
Perforations are applied locally only to the first area of the plate where sensible heat transfer is the primary function, while the second area maintains a solid structure for moisture transfer and overall structural support. This localized approach preserves structural integrity while enhancing sensible energy exchange where needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the efficiency of both sensible and latent energy exchange by up to 100% and adapts to environmental conditions, preventing ice buildup and ensuring high moisture transfer capabilities, suitable for various flow configurations and harsh conditions.
Implementation Method 1
a polymer film (3) covering a portion of the plate element (1), wherein the polymer film (3) allows for a fluid to flow between each layer of the polymer film (3)
Implementation Method 2
heat exchangers are used to recover heat energy from one fluid or medium into another one
Data Source
Figure 1~2
AI summary
The invention provides enthalpy 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. Also, a method for the production of enthalpy exchanger elements is provided including a) perforating a flat plate element (1) according to a predetermined perforation pattern within the plate outer dimensions; b) forming the plate element (1) into a desired embossing pattern and geometrical shape; and c) applying to at least one side (1a) of the plate element (1) a polymer film (3) with water vapor permeation characteristics (water vapor transfer ratio, WVTR).