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Mayors' Megawatt Challenge Forum
Toronto, November 9th 2016 - Daniel Giguère
Best Practices for Refrigeration
Ice Plant Systems
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Refrigeration Equipment Selection
Criterias Economics
First Cost and Total Cost of Ownership
Public Safety
Refrigerant Toxicity and Flammability
Sensitive or Vulnerable People in the Vicinity of the Ice
Arena
Environment
GWP direct emissions (natural gas)
GWP indirect emissions (sybnthetic refrigerant leaks)
Energy
Loads and Demand: Refrigeration and Space & Water
Heating
Heat Recovery
Equipment Energy Efficiency & Controls
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Energy Consumption - Typical Ice Rink
Refrigeration43%
HW8%
HVAC22%
Various20%
Light7%
1Million kWh
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Refrigeration LoadsRefrigeration LOADS
(ASHRAE 2014)
Ceiling radiation 33%
Ice Surfacing 17%
Brine Pump 9%
Space Heating 16%
Condensation 9%
Lighting 6%
Ground (slab) 3%
Miscellaneous 7%
Refrigeration Loads Reductions
Low-e Ceiling: > 50%
Brine Pump: > 50%
Lighting: > 50%
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Energy Savings - Refrigeration Measures
Refrigeration20%
Refrigeration Savings
23%
HW8%
HVAC22%
Various20%
Light7%
Low-e CeilingFloating HeadVSD Brine Pump
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Ice Rink As a System
Underfloor Heat
G
HEATED SPACES
CONDENSER
UNDERFLOOR HEAT
ICE
REFRIGERATION PLANT (ELECTRIC)
BRINE PUMPG
GFAN
CONNECTED
FACILITIES
HEAT PLANT (GAS/OIL/ELECTRIC)
C.W.
CHILLER
EXPANSION
VALVE
KW/KWh
ELECTRICITY
m3
GAS
COMPRESSOR
SWH
HEATED SPACES
City Water
Gray water & snow
GAS
Control Volume
70%
30%
80%
ELECTRICITY
Ground
Refrigeration43%
HW8%
HVAC22%
Various20%
Light7%
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Energy Savings with Heat Recovery
Refrigeration27%
Savings(ref)16%
HW8%
HVAC savings20%
HVAC2%
Various20%
Light7%
kWh
Low-e CeilingFloating HeadVSD Brine Pump
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8
Integrated Ammonia Refrigeration System
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9
CO2 Refrigeration System
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1. Study Objectives
A. Inform arena owners regarding the replacement of
refrigeration systems
B. Provide technical and financial assessments that are
neutral and objective
C. Propose an analysis model for consultants
D. Better understand the risks vs. the types of refrigerants
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Conclusion
Potential energy savings = 50% of total energy consumption
of an Ice Arena
Heat recovery of refrigeration system could save as much
energy as refrigeration measures
Integrated refrigeration and HVAC systems shows the
maximum energy savings
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Questions? Comments?Contact us:
450-652-4621
[email protected]
Or visit our website: www.nrcan.gc.ca
mailto:[email protected]://www.nrcan.gc.ca/
