The project's main challenges were twofold. First, EcoEnergetic constraints related to the electromechanical installations posed a particular challenge. The refrigeration system compressors had become obsolete and inadequate for the two ice surfaces. They had to be replaced by a better performing system if the municipality was to reach its energy objectives. Also, during construction, at least one ice surface had to remain operational at all times.
The project was backed by the Refrigeration Optimization Program (OPTER), which aims to reduce gas emissions and promote energy efficiency. This study guided the town in its selection of the best performing and energy-saving mechanical systems required to obtain the maximum grants from both the provincial and federal governments.
The design and construction criteria for the Mustangs' new arena was based on project cost versus energy performance, with penalties for late delivery or insufficient energy savings.
The scope of the work included the design and construction of a new centre and an arena with a total surface area of 3,800 m2. Elements included among others:
- An additional 85' x 200' NHL ice rink with 800 heated seats, which can be converted into a 1,500-seat performing arts theatre;
- Large hall with a view on both ice surfaces; and
- Retrofitting of the existing ice and 550 seats, common areas, and electromechanical systems.
Pomerleau participated in the design development of the project with respect to energy-efficient features such as CIMCO Refrigeration's ECO CHILL® system. This high-tech energy recycling system was developed based on energy performances obtained with the Dow Centennial Centre pilot projects, monitored by CANMET, an agency of the Canadian Ministry of Natural Resources.
This system uses ammonia as a coolant (not a greenhouse gas) to cool the ice, and a combination of water and glycol for the secondary loop (heat recovery and distribution), none of which has an adverse effect on the ozone layer. In addition, virtually all the heat generated by the compressors for the cooling of the ice is reused to preheat domestic and service water; to heat under the ice slab; for radiant heating under the seats and concrete flooring; for the preheating of fresh air; and for the melting of the snow. This system also consists of a bank of ice that stores heat or cold in order to manage peak demand for heating or air conditioning.