Sunday, 26 June 2016: 9:45 AM-10:45 AM
Fundamentals and Applications
Chair:
Ronnie Moffitt, P.E., Trane
Technical Committee: 05.05 Air-to-Air Energy Recovery
Total energy recovery devices transfer both temperature and moisture between the airstreams. Two types of these newer technologies are membrane exchangers and liquid desiccant systems. This session covers the science of membrane exchangers and how they transfer water vapor and heat. It also reviews a liquid desiccant system and how this too can be used to transfer water vapor and heat between exhaust and outside airstreams.
1 Science of Polymeric Membranes Used in Energy Recovery
 |
Ryan Huizing, P.Eng., dPoint Technologies |
Energy recovery ventilation (ERV) is an emerging and growing application for polymeric membranes used in energy efficient building ventilation systems. In these enthalpy exchange devices, heat and moisture are transported through a membrane which separates fresh supply air streams and building exhaust air streams. Membranes for these devices must have high water vapor permeance and good selectivity of water vapour over indoor air contaminants. They must be robust to withstand temperature and humidity cycling, condensation, and freezing. This presentation will discuss the current state of membranes for sensible and latent transfer as well as ongoing membrane research, development and testing.
2 Liquid Desiccant Total Enthalpy Recovery
 |
Mark Piegay, Alfa Laval - Kathabar |
Liquid desiccant energy recovery systems exchange temperature and humidity between the building exhaust air and the outside makeup air via an energy transfer solution. Liquid desiccant energy recovery systems have many features that building owners will find attractive. In addition to energy savings, the system features include a flexible design, winter humidification, no microbiological cross contamination, and improved IAQ via the biocidal desiccant solution.