Resources, Tools and Basic Information for Engineering and Design of Technical Applications!
mobile - visible on handheld devices - alternatively go to www.engineeringtoolbox.com!
Engineering ToolBox > Calculating Cooling Loads
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 (gal/min) 60 (min/h) dt (oF)
= 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) (10oF) / 12,000
= 0.42 ton