What type of refrigeration system is typically used in ice arenas?

In ice arenas, an indirect refrigeration system is commonly employed due to its efficiency and safety. This system uses a secondary refrigerant, typically a mixture of water and antifreeze, that absorbs heat from the ice surface and carries it away to the primary refrigeration system. The indirect method minimizes the potential for refrigerant leaks directly into the ice layer, reducing the risk of contamination and providing a safer environment for skaters.

The indirect system also allows for better temperature control and stability, which is crucial in maintaining optimal ice conditions. It suits the needs of ice facilities because it enables the operation of ice rinks even under varying external temperature conditions. By circulating the secondary coolant, it can efficiently transfer heat away from the ice surface without putting the rink users at risk from exposure to direct refrigerants.

This approach distinguishes itself from direct systems, which use refrigerants to chill the ice directly and may present more risks and complexities in maintenance and operation.