Spectator C ice rink
Design, Air handling, Ammonia-water, CO2, Heat export, Heat recovery, Refrigeration, Sec. refrigerant
Testebo ishall has two ice sheets (ice hockey and curling in separate buildings) and consists also of a sports hall. An R404a refrigeration system with calcium chloride running in the rink and curling floor pipes was used before to cover the cooling demand. The heating demand was mainly covered by district heating. In 2015 an indirect CO2 refrigeration system replaced the old one. The existing secondary circuits were reused and retrofitted with aqua ammonia, reducing the pumping power demand. The new system provides a new complete one stage heat recovery function with a constant 60°C forward temperature. A new sorption dehumidifier benefits for instance from the recovered heat for reactivation.