Chiller utility calculation

[barleyfreak]

I received a quote for a chiller that estimates 13,200 BTU’s/hr at our max capacity. Our yearly electrical costs would therefore be:

13,200 BTU's/hr = 3.87 kWh/hr
3.87*24(hours)*365(days) = 33901 kWh/yr
33901*$0.17/kWh (our local rate) = $5763/yr electricity charges.

However we will not start out at max capacity and I am trying to use the formula from JVNW’s site based on expected production,

UTILITIES
Electrical 20 - 35 kWh/bbl
Natural Gas 2 - 3.7 Thermos/bbl
Water 6 - 8 BBL's water/bbl beer produced
Refrigeration 10 - 20 BTU chiller capacity/bbl yearly capacity
Direct Fired Brew Kettle 25,000 30,000 BTU/bbl Cast Wort

Question: Is the 10-20 BTU/bbl a per hour figure? For example if I brew 300bbls the first year, then I used 300*20btu = 6000 btu/hr?

Thanks!

[Baldrick]

Out of curiosity what are your brewhouse and cellar tank sizes and your current and maximum annual capacity?

[barleyfreak]

Projected starting inventory is 3 7bbl FVs and 4 7bbl STs. The initial capacity is around 350-400 bbl depending on ferment cycle and ale/lager ratio. Plans to add 2 more FVs, including a 14bbl, would boost max capacity to around 1000bbl.