The first layer of what will be many miles of pipe is being installed at the new arena. There will be three layers of pipes before five inches of concrete is poured on top of it all.
The first layer seen in these photos will carry warm glycol that will keep the earth beneath the ice from freezing. Heat generated while chilling the ice will be used to keep this layer warm. Nothing goes to waste. Without this warm layer, the earth beneath the rink would freeze and eventually heave and cause the concrete slab to crack.
Clear. Temperature: 53; Wind: Calm; Conditions as of Wed Jun 19 at 10:00 PM EDT
Thanks for the pictures and for explaining the purpose of the warm glycol. I never knew you had to keep the ground underneath from freezing but it makes sense to prevent frost heave.
All the best,
Ted