Beijing National Speed Skating Oval

This Olympic venue is one of the few large-size ice arenas in the world that uses Carbon dioxide| refrigerant. is used as both refrigerant in cooling system and secondary refrigerant in cooling distribution system, including the rink pipes. The arena has been completed with a heat recovery function, that can cover arena heating demands like ventilation, air dehumidification, hot water production, etc. The refrigeration rack, including cooling machines, has 4 MW max cooling capacity. ==Track records==