RAPB. Multi-Purpose Facility. Characteristics of Hockey Rink. Project profile Refrigeration technological innovation

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1 Project profile Refrigeration technological innovation RAPB REFRIGERATION ACTION PROGRAM FOR BUILDINGS Dow Centennial Centre (Alberta) NEW CONSTRUCTION Summary Potential for total heat recovery from refrigeration system Extensive integration of the refrigeration system with the heating, ventilation and air conditioning system Ice battery for short term storage of heat and cold Variable condensing temperature and pressure (Floating head pressure) Multi-Purpose Facility Owner City of Fort Saskatchewan, Alberta Built in 2004 Total Surface Area (footprint) 10,220 m 2 (110,000 sq.ft) Facility Function Hockey rink, leisure rink, full size soccer field, gymnasium, gym, fitness centre with running track, theatre, conference rooms and art studios Characteristics of Hockey Rink Surface area 1,580 m 2 (17,000 sq. ft) Seating capacity 400 Months operated/year 10.5 Hours open/week 96 Times ice resurfaced/week 50 to 60 Heated bleachers Yes, to 13 C (55 F)

2 Refrigeration System Equipment type Eco Chill, factory-built Compressors 2 rotary screw compressors Condensers 2 plate and frame Evaporators 1 flooded plate and frame Heat rejection system Heat rejected in a glycol tank (thermal equalizer); excess heat rejected by a cooling tower Refrigerant Ammonia Total cooling capacity 120 tons Operation of condenser Floating head pressure and temperature Secondary fluid for cold and warm loops Glycol (40% ethylene glycol) Energy Efficiency Measures Heat recovery around the hockey rink Player s rooms space heating Using the warm glycol loop Preheating domestic and resurfacing water Heat exchanger using warm glycol loop to increase water temperature up to 29º-32ºC Under floor heating Using the warm glycol loop Melting ice rink scrapings Snow pit heated by the warm glycol loop Heat recovery in the building Preheating domestic hot water Using the warm glycol loop Theatre, soccer field and gym space heating Using the warm glycol loop

3 Thermal storage An ice battery having a capacity of 1,760 kwh (500 ton-hour) is used for the short term storage of energy. Winter operation: Ice burn (melt) mode: Ice battery (build) mode: Excess heat rejected stored in ice battery Heat removed from ice battery to provide building heating load Summer operation: The ice in the ice battery is used to satisfy the building s air conditioning load. Other measures Building Automation System (BAS) Yes Efficient lighting (Hockey rink) High-intensity discharge (HID) lamps Metal halide Lighting intensity varied to suit different activities Yes, 3 levels (idle, standard skating and hockey) Project Cost Overall cost of multi-purpose facility construction work, including engineering (before financial assistance): $26 M Financial assistance for energy efficiency Office of Energy Efficiency (through CBIP), CETC-Varennes (through RAPB) Technology Early Action Measure (TEAM)

4 Benefits Energy consumption To come Environmental benefits Effect of refrigerant on the ozone layer Ammonia is not subject to the Montreal Protocol (No effect on the ozone layer) Greenhouse gas (GHG) emissions Ammonia has no global warming potential. Other benefits Ice quality without compromise System reliability Combines cooling and heating technology into a single source Reduction of maintenance costs Rationale Necessity of having a regional sport facility Desire to reduce operating costs Environmental vision for energy efficiency and reduction of GHG emissions Suppliers and Contractors Refrigeration design and contractor CIMCO Refrigeration General contractor Stuart Olson Mechanical Design A.D. Williams Automation system CIMCO Refrigeration

5 Simplified System Schematic Surge Drum Rotary Screw Compressors Cooling Tower F&P Chiller F&P Condensors Water Tank Ice Burn Pump Ice Battery Hot Glycol Tank Heating Load HVAC DHW Preheating Main Ice Rink Leisure Ice Rink Underfloor Heating (Main & Leisure) Snow Pitt Cooling Load HVAC

6 RAPB The Refrigeration Action Program for Buildings (RAPB) fosters the use of innovative refrigeration practices in order to reduce the greenhouse gas emissions that result from the efficient use of energy and the reduction of refrigerant leaks in supermarkets, ice and curling rinks. A French version is also available FOR MORE INFORMATION CANMET Energy Technology Centre - Varennes / Natural Resources Canada 1615, Lionel-boulet Boulevard, P.O. Box 4800, Varennes, (Québec) J3X 1S6 CANADA Telephone: (450) , Facsimile: (450) , Website: CTEC-CETC.Varennes@rncan.gc.ca Her Majesty the Queen in Right of Canada, (PROMO)