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Journal Article by ASHRAE, 2017
Jorgen Rogstam; Simon Bolteau; Cajus Gronqvist
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One ice rink in Sweden reduced its energy use by 50% to 60% after replacing its old indirect refrigeration system with a direct 100% CO2 system combined with a heat pump function. These and results from other CO2 installations may signal a change in how ice rinks will be cooled and heated.
Citation: ASHRAE Journal, Vol. 59, no. 8, August 2017