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A chiller refrigeration ton is defined as:
1 refrigeration ton = 12,000 Btu/h = 3,025.9 k Calories/h
A ton is the amount of heat removed by an air conditioning system that would melt 1 ton of ice in 24 hours.
A cooling tower ton is defined as:
1 cooling tower ton = 15,000 Btu/h = 3,782 k Calories/h
A water systems heat load in Btu/h can be simplified to:
h = cp ρ q dt
= (1 Btu/lbm oF) (8.33 lbm/gal) q (60 min/h) dt
= 500 q dt (1)
where
h = heat load (Btu/h)
cp = 1 (Btu/lbm oF) for water
ρ = 8.33 (lbm/gal) for water
q = water volume flow rate (gal/min)
dt = temperature difference (oF)
Water flows with 1 gal/min and 10oF temperature difference. The ton of cooling load can be calculated as:
Cooling load = 500 (1 gal/min) (10 oF) / 12,000
= 0.42 ton
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