Tuesday, January 23, 11:00 AM - 12:30 PM
Going Large in Air-to-Air Energy Recovery
Track: Systems and Equipment
Chair: Adam Fecteau, Member, Aldes, Saint-Léonard-d’Aston, QC, Canada
With the continuous improvement to building envelopes, the desire to improve IAQ and the necessity to minimize energy consumption, air-to-air energy recovery plays an important role. From small projects with a few hundred of CFM up to very large applications with ventilation rates in the tens of thousands, ERVs have their rightful place. This seminar focuses on the large applications. It addresses the design considerations for buildings with very large ventilation rates, considers the impact on the HVAC system and give guidelines on how to specify large ventilation equipment in order to maximize its efficiency.
1. Going Big in Energy Recovery
Ronnie Moffitt, P.E., Member, Trane, Lexington, KY
Exhaust air energy recovery is often utilized in buildings to reduce peak loads and operating expenses associated with heating and cooling ventilation air. There are many off the shelf solutions for smaller applications, however the adoption of energy recovery technologies to large commercial applications will require different design considerations. A system with a ventilation air requirement in the tens of thousands CFM may end up looking quite different than a system with far less. There are many reasons for this, some related to the building others to the technologies themselves. Overall, going big with energy recovery can have big benefits.
2. Enthalpy Plate Exchangers for Large Airflow Application
Mo Afshin, P.Eng., Member, dpoint technologies, Vancouver, BC, Canada
With the increasing ventilation requirements and advancements in envelopes, the role of exhaust air energy recovery has become more significant than ever. With different energy recovery components available for large air flow applications, developers can still benefit from energy recovery for applications where a single unit provides the ventilation air. This presentation reviews the trends in energy recovery technology and standards for high flow rate applications and challenges facing enthalpy plate exchangers. These challenges include; pressure drop and foot print. This study reviews each challenge and offers solutions with calculations and case studies.
3. Integrating Large Energy Recovery Units in Cold Climate Designs
Julien Allard, P.Eng., Member, BPA, Montréal, QC, Canada
With the increase in outdoor air needs in buildings and the necessity of reducing our energy consumption, the use of high efficiency energy recovery units is a great tool especially in cold climates where the heating demand is very high. This presentation addresses the main design considerations, different types of units as well as all related impacts to other disciplines. It also takes a look at installation methods and addresses the cross-contamination issue.