Approx. cost to make ice in the Arena

[JJBarnes]

I have to determine the approximate cost to make ice for the ice skating event (Disney on Ice) in the local Arena. We have 3 compressors plus a brine pump (the brine pump will run all the time) and the compressors stage until ice is made then one compressor will maintain the ice. The amperage listed is taken off the face of the breaker on the read-out screen. All three compressors will run for 8 hours, 2 will run for another 40 hours then one will run to maintain (we'll use 24 hours which will be multiplied for however many days the event will run.

All pumps for 8 hours - 504 amps x 480v=241,920 x 1.732=
419,005.44 x 8 hrs = 3,352,043.5 /1000 = 3,352kw

2 pumps for 40 hours - 380 amps x 480v= 182,400 x 1.732=
315,916.8 x 40 hrs = 12,636,672 /1000 = 12,637kw

1 pump for 24 hours - 240 amps x 480v= 115,200 x 1.732=
199,526.4 x 24 hrs = 4,788,634 /1000 = 4,789kw
---------
3-day total = 20,778kw
JEA cost per kw x .02214
---------
$460.02


Am I on the right path here not counting demand and kvar?


Thanks,

Jeff

 

[wireguru]

where are you getting power for TWO CENTS a KWH? I know a datacenter operator who would like to buy your arena for the two cent per kwh electricity......

edit: I looked at JEA's website and found the rates. You have a fuel charge on top of the charge for the electricity, and there is a demand charge as well. Bottom line, is its not going to cost $400 -its going to cost a couple thousand.

 

[JJBarnes]

I got the figures from JEA today. Based on your reply (and thank you) I called back which the person did admit the fuel surcharge and environmental fee was not included. With that said the cost per kw is 2.214, fuel surcharge is 4.416 and environmental fee is .062. This rate is now 6.692 per kwh (not including the demand) x 20,778kwh = $1,390
Our demand rate is $11.47 but I'm not sure how much would apply to this. Any input?

Jeff

 

[nakulak]

what about the water bill ? what about removal ? what if the weather changes ? is the arena indoors (heating inside arena will go up). you might want to consult someone who has actually iced this arena or one nearby.

 

[JJBarnes]

They just wanted me to work up an approximate for the electrical. The real question is the demand as far as the electrical goes. I was wondering about the water and ice removal as well.

Jeff

 

[mivey]

All pumps for 8 hours = $4,791.94:
504_A x 0.480_kV x sqrt(3) x 90%_pf = 377.12_kW
377.12_kW x 8_h = 3017_kWh
($11.47_$/kW x 377.12_kW) + ((0.02214+0.04416+0.00062)_$/kWh x 3017_kWh) = $4,527.41 including rate+fuel+environmental
$4,527.41 x (1 + 0.03/0.915+0.025/0.975) = $4,791.94 including franchise fee and gross receipts tax

2 pumps for 40 hours = $4,257.43:
380_A x 0.480_kV x sqrt(3) x 90%_pf = 284.33_kW
284.33_kW x 40_h = 11373_kWh
($11.47_$/kW x 284.33_kW) + ((0.02214+0.04416+0.00062)_$/kWh x 11373_kWh) = $4,022.41 including rate+fuel+environmental
$4,022.41 x (1 + 0.03/0.915+0.025/0.975) = $4,257.43 including franchise fee and gross receipts tax

1 pump for 24 hours = $2,485.39:
240_A x 0.480_kV x sqrt(3) x 90%_pf = 179.58_kW
179.58_kW x 24_h = 4310_kWh
($11.47_$/kW x 179.58_kW) + ((0.02214+0.04416+0.00062)_$/kWh x 4310_kWh) = $2,348.19 including rate+fuel+environmental
$2,348.19 x (1 + 0.03/0.915+0.025/0.975) = $2,485.39 including franchise fee and gross receipts tax

I'm not sure if the arena pays sales tax but if it does, you would add that to the totals as well.

 

[mivey]

Oops: multiple-dipped demand

Oops: multiple-dipped demand

All pumps for 8 hours = $4,791.94:
504_A x 0.480_kV x sqrt(3) x 90%_pf = 377.12_kW
377.12_kW x 8_h = 3017_kWh
($11.47_$/kW x 377.12_kW) + ((0.02214+0.04416+0.00062)_$/kWh x 3017_kWh) = $4,527.41 including rate+fuel+environmental
$4,527.41 x (1 + 0.03/0.915+0.025/0.975) = $4,791.94 including franchise fee and gross receipts tax

2 pumps for 40 hours = $4,257.43:
380_A x 0.480_kV x sqrt(3) x 90%_pf = 284.33_kW
284.33_kW x 40_h = 11373_kWh
($11.47_$/kW x 284.33_kW) + ((0.02214+0.04416+0.00062)_$/kWh x 11373_kWh) = $4,022.41 including rate+fuel+environmental
$4,022.41 x (1 + 0.03/0.915+0.025/0.975) = $4,257.43 including franchise fee and gross receipts tax

1 pump for 24 hours = $2,485.39:
240_A x 0.480_kV x sqrt(3) x 90%_pf = 179.58_kW
179.58_kW x 24_h = 4310_kWh
($11.47_$/kW x 179.58_kW) + ((0.02214+0.04416+0.00062)_$/kWh x 4310_kWh) = $2,348.19 including rate+fuel+environmental
$2,348.19 x (1 + 0.03/0.915+0.025/0.975) = $2,485.39 including franchise fee and gross receipts tax

I'm not sure if the arena pays sales tax but if it does, you would add that to the totals as well.

Just realized I charged for the demand more than once. Revision:

All pumps for 8 hours = $4,791.94:
504_A x 0.480_kV x sqrt(3) x 90%_pf = 377.12_kW
377.12_kW x 8_h = 3017_kWh
($11.47_$/kW x 377.12_kW) + ((0.02214+0.04416+0.00062)_$/kWh x 3017_kWh) = $4,527.41 including rate+fuel+environmental
$4,527.41 x (1 + 0.03/0.915+0.025/0.975) = $4,791.94 including franchise fee and gross receipts tax

2 pumps for 40 hours = $805.57 :
380_A x 0.480_kV x sqrt(3) x 90%_pf = 284.33_kW
284.33_kW x 40_h = 11373_kWh
((0.02214+0.04416+0.00062)_$/kWh x 11373_kWh) = $761.10 including rate+fuel+environmental
$761.10 x (1 + 0.03/0.915+0.025/0.975) = $805.57 including franchise fee and gross receipts tax

1 pump for 24 hours = $305.27:
240_A x 0.480_kV x sqrt(3) x 90%_pf = 179.58_kW
179.58_kW x 24_h = 4310_kWh
((0.02214+0.04416+0.00062)_$/kWh x 4310_kWh) = $288.42 including rate+fuel+environmental
$288.42 x (1 + 0.03/0.915+0.025/0.975) = $305.27 including franchise fee and gross receipts tax

Plus any applicable sales tax.

Also, if the 1 pump run carries over into another billing cycle, you would add another month's demand for that pump at $2,180.12 plus any applicable tax.

 

[mivey]

The total is $5,902.78 for 18,700 kWh for an average of 31.6 cents/kWh. I realize this average is high but there are only 22.23 equivalent run hours (3% load factor).

For a normal load with a 20-50% load factor, the rate would average between 10.8 and 8.6 cents/kWh (excluding customer charge and any applicable sales tax).

Add: All of this also assumes the demand is coincident but we don't have enough data to determine otherwise so it is best to be conservative.