Improving energy efficiency has positive impacts economically (lower energy costs) and environmentally (reduced greenhouse gas emissions).
All expansion and modernization projects at Montréal–Trudeau airport include an energy-efficiency improvement component. The many initiatives undertaken have enabled Montréal–Trudeau to save 43,984 tonnes of CO2 from 2004 to 2012 and to market carbon credits, making the airport the first in North America to trade carbon credits.
Thermal plant and heating, ventilation and air conditioning system (HVAC) at Montréal–Trudeau
The thermal plant at Montréal–Trudeau airport, commissioned in 2003, is an energy efficiency showcase. ADM engineers developed and applied innovative concepts for the new plant, which won recognition awards from key organizations in the field of energy efficiency: an Energia Award from the Association Québécoise pour la maîtrise de l’énergie, and a Mercuriades Award for Energy Efficiency from the Fédération des chambres de commerce du Québec.
Aéroports de Montréal has also made significant improvements to the airport’s HVAC system in recent years to optimize its efficiency and supply energy on demand, which reduces losses:
- Optimization of natural lighting and air-conditioning demand to minimize energy by using motorized “smart” shades;
- Free cooling by maximizing fresh-air flow when the outside temperature varies between 5° and 20°C;
- Demand-Controlled Ventilation (DCV) by modulating the ventilation systems depending on served-spaces demand;
- Modulation of the ventilation system supply air temperature based on served-spaces temperatures;
- Implementation of schedules for HVAC equipment using “occupied” and “unoccupied” modes;
- Control of pressure for hot and chilled water pumps based on terminal units’ demands;
- Shutoff of outside air fans in extreme weather conditions;
- Installation of speed controllers, thus reducing energy consumption by the fan and pump motors.
In order to generate moisture in a part of the terminal building where the air is very dry, especially in the winter, a living wall was installed in the public area of the terminal in 2016. This vertical garden, composed of various species of green plants, acts as an ecological humidifier, biofilter and oxygen generator, in addition to reducing energy consumption and improving the customer experience.
Other measures that have lowered energy consumption and reduced Montréal–Trudeau airport’s environmental footprint include replacement of external sliding doors by exterior revolving doors, installation of variable speed drives on escalators and moving sidewalks, use of dedicated fresh-air systems, installation of heat-reclaim-type chillers, construction of an underground parking garage heated by low-temperature hot water generated by heat recovery, and installation of water recycling humidifiers.
Intelligent motorized shades
The huge windows in the international and transborder jetties provide spectacular views, but they also result in solar heat gain that must be controlled so as to reduce air-conditioning needs. To address this, in 2007 ADM undertook a solar-energy management project in partnership with Concordia University’s Solar Buildings Research Network and Somfy, the company that manufactured the motorized shades on the windows.
The result: state-of-the-art intelligent motorized shades controlled by the airport building-management system, equipped with light sensors and actuators programmed to minimize lighting and HVAC energy use through raising and lowering of the shades based on light levels and indoor and outdoor air temperatures.
Every eight minutes, the system records the natural-light level and temperature in different zones, and controls the movement of the shades accordingly. The objective is to maintain sufficient natural lighting while reducing lighting and HVAC energy consumption and ensuring passenger comfort.
This project is part of a global energy-management process and improves energy efficiency in our buildings.
Aéroports de Montréal now promotes the use of LED lights, which use less energy than traditional bulbs, for its lighting needs, including for all runway and taxiway lights. The Corporation has continued the LED technology conversion program and the optimization of lighting in the airport terminal. Airside lighting is now reduced at night during inactive periods.
Motion detectors have been installed in the administrative offices to reduce lighting consumption. This project, which received a grant from Hydro-Québec as part of its Industrial Initiatives Program for major customers, has been expanded to some areas of the terminal building.
Heated- and cooled-air supply and ground power units (GPUs) for aircraft
ADM also helps airlines reduce the GHG emissions of their aircraft when they are parked at boarding gates.
Initiatives have included equipping boarding bridges with 400 Hz electrical outlets or electric power units, as well as preconditioned air hose for aircraft parked at the gates.
By relying on those units rather than mobile generators, which burn diesel fuel, air carriers lower their GHG emissions. In addition, air supply hose retractors have been installed at the boarding bridges, which makes them easier to unroll and encourages their use.
Airport Carbon Accreditation
In December 2014, Montréal–Trudeau obtained Airport Carbon Accreditation (Level 2: Reduction), becoming the first airport in Canada so recognized. This major certification speaks to ADM’s commitment to protecting the environment and reducing its GHG emissions. In December 2016, ADM achieved Level 3, Optimization, in recognition of its commitment to reducing greenhouse gas (GHG) emissions in collaboration with the airport’s various partners.
Airport Carbon Accreditation is a program developed by Airports Council International that provides a standardized, independent method for airports to define, and promote, their CO2 emissions management and reduction efforts. Accreditation recognizes efforts made toward control and reduction of an airport's carbon footprint.