Umeå ishall B – New refrigeration system
Training B ice rink
Design, refrigeration , sec. refrigerant, heat recovery
Umeå arena has two ice sheets: one located in a 5800-spectator capacity arena (heated to 15°C) and the other one in this training hall – Umeå ishall B. Before the renovation, the cooling demands were covered by an indirect ammonia refrigeration system providing its 600kW cooling capacity through a calcium chloride circuit. A heat recovery function also existed: a heat pump on the coolant circuit which covered a part of the heating demand. In 2017 a CO2indirect refrigeration unit replaced the ammonia one, and aqua ammonia replaced calcium chloride as the secondary refrigerant. The system is equipped with a two stage heat recovery function, from which e.g. a new sorption dehumidifier benefits by applying recovered heat.
The CO2 refrigeration/heat recovery system fulfills 80-90% of the arena heat demand. The facility has reduced its energy consumption by 22%