Time Laps of Snow Flake Lake Conversion

[IndyGuy4KI]

Here is a time laps video of the Royal Fountain being transformed into the ice skating rink Snow Flake Lake for Winterfest. It took workers three and half weeks to install the 240 feet. x 78 feet wide rink and 30,000 gallons of water to create its icy surface. Winterfest is open select nights in November and December. More information and tickets are available at visitkingsisland.com.

[Snowball]

Haha I see myself in that. I’m in the orange lift working on the fountain lights.

[DeltaFlyer]

By my observations, snowflake lake is using 600 tons of cooling to make the ice. That's pretty bonkers.

There are three 200-ton Aggreko chillers in the fenced enclosure behind the Zamboni garage. For the other nerds out there- that's 7,200,000 BTU/hr of cooling, or 200 times larger than the typical home air conditioning system. 

[BoddaH1994]

18 minutes ago, DeltaFlyer said:

By my observations, snowflake lake is using 600 tons of cooling to make the ice. That's pretty bonkers.

There are three 200-ton Aggreko chillers in the fenced enclosure behind the Zamboni garage. For the other nerds out there- that's 7,200,000 BTU/hr of cooling, or 200 times larger than the typical home air conditioning system. 

Sooo… what’s the average cost per hour to keep the ice frozen?

[DeltaFlyer]

1 hour ago, BoddaH1994 said:

Sooo… what’s the average cost per hour to keep the ice frozen?

That would depend on a lot of factors- outside air temp, how much the chillers are cycling, their efficiency, etc. 

Assuming they are using all 3 chillers at about 80% capacity (typical safety margin), that would be 7.2 MBtu/hr * 0.8 = 5.76 MBtu/hr / 0.003412 Mbtu/hr/kW = 1688.15 kW of thermal power. Using a COP of 2.8, these would consume approximately 602 kW of electrical power. At $0.097 per kWh, this would place the running cost at $58.39 per hour. 

[BoddaH1994]

3 hours ago, DeltaFlyer said:

That would depend on a lot of factors- outside air temp, how much the chillers are cycling, their efficiency, etc. 

Assuming they are using all 3 chillers at about 80% capacity (typical safety margin), that would be 7.2 MBtu/hr * 0.8 = 5.76 MBtu/hr / 0.003412 Mbtu/hr/kW = 1688.15 kW of thermal power. Using a COP of 2.8, these would consume approximately 602 kW of electrical power. At $0.097 per kWh, this would place the running cost at $58.39 per hour. 

That’s much cheaper than I thought. 
 

 

[King Ding Dong]

18 hours ago, DeltaFlyer said:

That would depend on a lot of factors- outside air temp, how much the chillers are cycling, their efficiency, etc. 

Assuming they are using all 3 chillers at about 80% capacity (typical safety margin), that would be 7.2 MBtu/hr * 0.8 = 5.76 MBtu/hr / 0.003412 Mbtu/hr/kW = 1688.15 kW of thermal power. Using a COP of 2.8, these would consume approximately 602 kW of electrical power. At $0.097 per kWh, this would place the running cost at $58.39 per hour. 

Any chance you can use your Gödel-fu and calculate the hourly cost of running the fountains including the water loss?

[DeltaFlyer]

On 11/29/2021 at 11:26 AM, King Ding Dong said:

Any chance you can use your Gödel-fu and calculate the hourly cost of running the fountains including the water loss?

This is going to be assuming a whole lot of variables since I don't know the exact specs of the fountain, but here goes:

Fountain has 112 total nozzles (source). By observation, there are (26) 1" Finger Jet Nozzles, (26) 1.5" Geyser Nozzles, (6) 2" Geyser Nozzles, and (54) 1" Geyser Nozzles. Assuming Heights of 10 feet for the Finger Jets and 1.5" Geysers, 15 feet for the 1" Geysers, and 25 feet for the 2" Geysers. 

Nozzle	Quantity	Aperture Size (in)	Height (ft)	Exit Velocity (ft/s)	Flow Rate (each, gpm)	Flow Rate (total, gpm)
1" Finger	26	1	10	25.38	62.1	1615.1
1" Geyser	54	1	15	31.08	76.1	4108.3
1.5" Geyser	26	1.5	10	25.38	139.8	3634.0
2" Geyser	6	2	25	40.12	392.9	2357.2
						Total: 11714.6

 

To size the pumps, I assumed a head of 150ft for each run. Total guesstimate, but it would be far too complicated to do any actual calculations to determine this, especially since the pipe runs to each nozzle are going to be in the 3-4" range to get the flow rates needed for the height. 

		HP	Amps (@480/3Ø)	VA	Basis of	Design
Pump 1 GPM	1615.1	100.0	124	103092	Grundfos	NBS 040-095/7.72
Pump 2 GPM	2054.152	121.0	156	129696	Grundfos	NBS 050-150/14.09
Pump 3 GPM	2054.152	121.0	156	129696	Grundfos	NBS 050-150/14.09
Pump 4 GPM	1816.975	100.0	124	103092	Grundfos	NBS 040-095/7.72
Pump 5 GPM	1816.975	100.0	124	103092	Grundfos	NBS 040-095/7.72
Pump 6 GPM	1178.622	75.0	96	79813	Grundfos	NBS 030-095/7.36
Pump 7 GPM	1178.622	75.0	96	79813	Grundfos	NBS 030-095/7.36
			Total Power:	728293	VA
				728	kVA
			Cost Per Hour:	$35.32

 

So there you go- $35.32 an hour assuming a 50% demand factor on the pumps (those fountains aren't at full spray all the time). 

As far as water loss, on a typical summer day the evaporative losses come out to be about 2,400 gallons per hour. That is about $10/hr using the GCWW rates.