realice energy savings ice rink vortex de-aeration ice arena fortisbc pilot project vortex generator co2 savings ice rink emissions savings ice rink cost savings ice arena cost savings ice rink cold water flooding ice making energy savings ice arena arena upgrade energy retrofits water treatment for ice making save money ice arenas saving money ice arena ice arena efficiency study realice large scale pilot study british columbia agrodome pne fortisbc flooding ice with cold water nature-inspired 3d printing biomimicry
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