Trois-Rivières University (UQTR)

Trois-Rivières University (UQTR)

A large-scale energy efficiency project at Trois-Rivières University has made this campus one of the most efficient in Quebec. Recovering heat and transferring it between the campus buildings was key to reducing the university’s energy footprint. Since heat recovery can only take place at relatively low temperatures and the university was already equipped with a high-temperature hot water system (150 °C), Ecosystem converted this to a low-temperature system (75 °C) which enabled the university to recover and reuse heat. As this measure affected the entire heating system, precise planning and impeccable construction management were crucial to its success.

  • 25%

    Energy Bill Reduction

  • 2012-2014

    Project Period

  • $6.3M


  • $412,703

    Guaranteed Annual Savings

  • $1.2M

    Guaranteed Incentives


A screw chiller with variable refrigerant flow was selected for the project.  In addition to being high performance and simple to operate, this innovative, leading-edge technology acts as a learning tool for students studying building mechanics at the university.

Customized Performance Measures

Hot Water System

Conversion of the high-pressure hot water system to a low-pressure system, which involved the same technical challenges as a steam to hot water conversion. By combining several complementary measures (heat recovery, adiabatic humidification, heat cascading) the university’s need for 150 °C water was eliminated, thereby reducing the high energy costs associated with heating water to such a high temperature. The water is now heated to  75 °C.

Heat Recovery

Installation of a system that recovers heat generated by electromechanical equipment and redirects it to the heating system using a high-efficiency chiller. Energy that would otherwise be wasted is now used to its full potential.

Adiabatic Humidification

Installation of a humidification system where water is atomized in the ventilation system to form a mist. The heat of the ambient air causes these fine water particles to evaporate. Adiabatic humidification is perfectly adapted to the building’s low-temperature systems.


Upgrade of ventilation system to efficiently deliver warm and cool air where it is most needed, and maintain appropriate levels of fresh air.

Efficient Fume Hoods

Addition of fume hoods with controllable air flow to meet actual needs.

Centralized Controls

Upgrade of systems that enable automatic control of electromechanical equipment in order to maintain occupant comfort and manage energy consumption.


Replacement of older generation bulbs and fluorescent tubes by efficient luminaires providing better lighting quality.