
Terms and Usable FormulasBtu= The amount of heat necessary to raise the temperature of one pound of water, one degree FahrenheitBtu/hr= GPM x Temp Rise x K K water = 500 K 30% glycol = 470 K 40% glycol = 450 K 50% glycol = 433 GPM = (Btu/hr.) / (K x Temp Rise) Btu/hr = Kw x 3412 Btu = lbs/hr of metal x (T hot  T cold) x Sp.Ht. T hot is the starting temperature of the metal T cold is the ending temperature of metal after quench Sp.Ht. is the specific heat of the metal to be cooled Btu/hr = BHP x 2545 x (Design Margin Factor: 1.2 typical Where BHP is Brake Horsepower Btu/hr = Tons of Refrigeration x 12000 Btu/hr = Evaporative Cooling Tower Tons x 15000 