Zachary said:
The same question crossed my mind the other day BGW Family.
Any idea what the ice differences between a typical public skating rink vs a performance rink are, mwhinva?
Well, I don't think there are differences between a "public" / "performance" ice rink. The public does skate on ice that a professional / amateur figure skater performs on and vice versa. (No, I did not miss-understand your question, just trying to make the point that the ice rink refrigeration systems are all designed to remove the heat from whatever surface the water is laying on in order to get the water to freeze into ice).
Course, now you have to figure out other factors that could impact the surface conditions of the ice:
- Indoor or Outdoor Ice Rink
- Permanent or Temporary Rink
- Rink Surface Area
- Air Temperature
I think these are the major fundamental variables that can impact the ice conditions on a rink.
I gave some explanation on the indoor versus outdoor ice rinks earlier; so, I won't rehash those variables. I do think that permanent ice rinks could have an advantage over ice rinks that are temporary set ups.
Permanent Ice Rinks have their refrigerant pipes in poured concrete. The concrete itself can keep cold longer and thus maintain a more stable ice surface than the material that houses the refrigerant piping for a temporary ice rink.
I thought temporary ice rinks either used an existing base (stage floor at BGW for example) or have to build a stable, flat, temp sub-floor. Then, some sort of insulation material is laid down on top of that. Then the refrigeration pipes are laid down. I don't know in what form those pipes are placed in. They could be panels connected together or a flexible mat that is rolled out.
Depending on the material the refrigerant pipes are in, the water could be added directly to that surface or another hard, thin layer is placed over the pipes and then the water is added.
Most temporary public ice skating rinks are outdoors and are usually 20% to 70% of the surface area of an officially sized American Ice Hockey Rink. Downtown Richmond has a temporary outdoor ice rink that opened the week before Thanksgiving. I guess the surface area is about 30% the size of an ice hockey rink.
Based on Matthew's photos of the show, the stage ice rink looks to be 5% the surface area of an ice hockey rink. It could be that the refrigeration systems needed for larger outdoor ice rinks are more robust and can deal better with the external variables when keeping the ice frozen.
Course, the ambient air temperature over the ice probably is the biggest factor. You also have to deal with the radiant heat from the sun if the ice is exposed to direct sunlight for outdoor rinks.
Even the best indoor ice rinks can have bad ice if the indoor air temperature is high for an extended period of time. Unlike a freezer, an ice rink can only remove heat from the water from one side; the floor. So, the water right next to the floor has the best chance of staying frozen; while the ice at the surface has the best chance of melting.
This has more impact for figure skaters. Ice Hockey ice is right around 3/4 inch thick. For figure skaters, the ice is just under 1/10 inch thicker. In addition, figure skaters require the ice surface to be "warmer" than the ice hockey players. For figure skaters, they prefer the ice surface to be between 26 and 28 degrees. Ice Hockey players need the ice surface temp to be between 24 and 26 degrees. Ice surface conditions can vary
GREATLY with a temperature change of just
1 degree.
So, as you can see BGW has their hands full keeping the ice frozen and at the right surface temperature for figure skaters.