QUOTE(smontanaro @ Dec 25 2009, 07:40 AM)
I remember them doing the same thing for last year's Winter Classic at Wrigley. I seem to recall these outdoor games present difficulties for their ice experts because the way the ice freezes and melts in an uncontrolled outdoor setting is much different than in the super-well-controlled indoor environments they are used to.
S
Yep. Ice temp is very important. Colder ice is harder ice. Cold ice chips and can cause holes in the ice. Warmer ice ruts easily and can cause uneven play. The other issue is the sun and weather conditions. If you work to keep the ice at a manageable temp while it is in the sun, the shaded ice can get very cold and chip easily. Opposite that, you can end up with melted areas and a slush buildup (which can alter the speed of the puck).
Generally, an outside temporary tank (rink) is usually cooled with a single set of compressors. However, it would not surprise me to find three or four compressor systems in this system so that each quarter of the ice can be controlled seperately.
They obviously had some public skating on the ice during the buildup (you can see it in the time lapse). Plenty of time to see how your sheet of ice will handle daily temp changes.
Eric