Toray develops advanced total heat exchange element sheets that can save energy and enhance ventilation comfort and hygiene

Toray Industries Inc announced on 20 Dec 2021 that it has developed a heat exchange sheet that delivers advanced heat transfer, moisture permeability, gas shielding, and water and antiviral resistance performance. This new offering could significantly enhance the energy savings, comfort, and ventilation hygiene of total heat exchange ventilation systems. The company aims to commercialize this sheet in 2022 for elements in total heat exchange ventilation systems, for which demand is rising in view of intensifying measures worldwide to combat COVID-19 infections. A total heat exchange ventilation system saves energy by exchanging temperature (sensible heat) and humidity (latent heat) between air from outdoors and interior exhaust air, reducing room temperature and humidity changes during ventilation. This lowers air conditioning system loads and improves comfort. Heat exchange sheets are inside system elements, so heat transfer properties and moisture permeability are necessary for the sheets to transfer temperature and humidity. Gas shielding is vital to keep carbon dioxide and odours in exhaust air out of supplied air. Generally, heat exchange sheets employ paper membranes. However, it was difficult to completely shield gas with porous paper, as well as to clean and remove dirt accumulating on elements after long-term use. Toray responded to this situation by creating a new heat exchange sheet comprising a unique thin porous film laminated with a functional resin layer that only lets humidity through. The sheet is about one-fifth the thickness of conventional paper counterparts and has excellent heat transfer properties. It is around 1.2 times more moisture permeable and delivers more than 20-fold better gas shielding, retaining that performance even after cleaning with water or a neutral detergent. Original source: Toray Industries, website: http://www.toray.com/, Copyright Toray Industries Inc 2021.
new material; laminates; plastic film; Toray [...]