Indoor ice skating rinks, ice hockey arenas, and various ice sports centers have high requirements for ice quality. The ice surface must remain flat and hard while avoiding surface melting or bubble formation. Beneath the ice rink surface lies a dense network of cooling pipes through which low-temperature secondary refrigerants circulate to continuously remove heat from the ice layer. The core of this process is an efficient and stable industrial refrigeration system.

To prevent the secondary refrigerant from freezing at sub-zero temperatures and to ensure smooth fluid flow, ice rinks commonly use glycol low-temperature chiller units as their primary cold source. The system cools a glycol-water solution down to between -10°C and -15°C, then pumps it through the pipe network embedded beneath the rink floor. Glycol antifreeze exhibits solid thermal conductivity and a low freezing point, keeping the ice surface temperature uniform and ensuring proper ice hardness.

Because ice rinks usually need to maintain low temperatures 24 hours a day and experience load fluctuations caused by varying crowd sizes, the screw low-temperature chiller has become an ideal choice for medium to large ice rinks. Featuring fewer moving parts and stable operation, screw compressors offer stepless capacity regulation. This allows them to precisely match cooling output to real-time arena loads, maintaining ice quality while reducing long-term electricity consumption.

For competition-grade rinks or multi-purpose sports arenas with extreme low-temperature demands—such as ice sculpture displays—ultra-low temperature chillers or cascade refrigeration technology are sometimes introduced to handle rapid ice-making and deep freezing requirements. As specialized refrigeration chillers, these units ensure cooling efficiency under demanding conditions and quickly rebuild ice surfaces between high-intensity events.

FAQ

Q1: Why do ice rinks prefer glycol low-temperature chiller units over direct expansion refrigeration?

A1: Direct expansion systems require charging massive amounts of refrigerant into the underground pipe network, which is costly and poses significant safety hazards in case of a leak. Using a glycol unit requires only a small refrigerant charge inside the mechanical room, while non-toxic glycol-water solution circulates through the rink floor pipes, greatly improving safety and maintenance convenience.

Q2: How do screw low-temperature chillers handle load fluctuations during ice rink operations?

A2: Heat loads vary significantly when a rink is empty, open for public skating, or packed during games. Screw chillers feature effective energy adjustment mechanisms, automatically adjusting compressor slide valves based on ice temperature sensors to achieve smooth capacity matching between 25% and 100%, avoiding equipment wear caused by frequent starts and stops.

Q3: What role do ultra-low temperature chillers play in ice rink operations?

A3: Ultra-low temperature units are mainly used during initial fast ice-making or for deep freezing the ice layer before professional hockey games. They provide lower leaving fluid temperatures in a short time, rapidly freezing water layers to form denser, tougher, competition-ready ice.