Ice rink in sports arena

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Hi All,
I am modelling a sports arena which also has an ice rink (for 6 months of
the year). On non-ice events, it is covered with the basketball court
material. How do I consider the "coolth" that is getting conducted to the
space on both ice and non-ice event times?
Do you think I could put in a -ve number in the miscellanous loads
category? How much should the load be? I have not been able to give it much
thought other than writing this email. Since there is, as usual, a time
constraint, I wanted to see what strategies others might have used.
As usual, appreciate any pointers and thanks in advance.
-Rohini

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R B
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Hello Rohini:

There is a very old study that used a DOE-2 simulation of an Ice Rink at the Rec Center at the University of Colorado...had to do some fiddling with the UA to make up for the limits on the zone temperature...results seemed reasonable.

Haberl, J., Claridge, D. 1985. "Retrofit Energy Studies of a Recreation Center", ASHRAE Transactions-Research, Volume 91, Part 2, pp. 1421 - 1433, (June).

Jeff

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Rohini,

I'd think of it less as the "coolth" being added to the space from the ice
and more as the electrical energy required to run compressor to maintain
the ice. I'm assuming that ice rinks don't heat the air since people are
perfectly comfortable with the idea of a rink being cold with so much ice
present. In the summer, this load for keeping ice frozen goes away.

In terms of practical ways to do it, I'd schedule some sort of
refrigeration load equivalent to what's needed to maintain the ice in the
winter -- have a thermostat setpoint that's basically equivalent to setting
that space to unconditioned. In the summer your schedule will turn off the
refrigeration load and then set that space back to conditioned.

That's just off the top of my head. Curious about thoughts others on the
forum would have about this.

Best,

-Michael

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Rohini ? Over the last few years, I have audited a number of ice arenas, although I have not modeled them in eQuest. There are a lot of energy related issues with ice arenas. It has been too many years and I?d have to dig up my reports and calcs for more specific information, but here?s a summary of the energy related issues that have to be considered: the direct (or indirect) ice refrigeration issues, cooling loads to keep the earth under the ice frozen (depending on what part of the country you?re in), sublimation of the ice to the space, the zamboni activities (also called re-surfacing) and subsequent ice melt of the shaved ice that the Zamboni picks up, ceiling emissivity, and finally, humidity control is a big one ? lots of energy in de-humidifying the space to prevent ice fog. I?ve attached a couple related articles on ice arenas and where the energy is used.

There is a lot involved, can?t help you with specifics for the eQuest modeling part, other than to suggest, as Michael Hsueh did, creating schedules and adding the loads as separate refrigeration, heat and cooling loads with their own schedules, as appropriate.

Good luck.

J

Jim Fowler, PE, CEA, CBCP

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