Cooling Tower Efficiency Thermal Calculation Wet Bulb Temperature

Cooling Tower Efficiency Thermal Calculation Wet Bulb Temperature Typically, 6,000 hours a year will have a wet bulb of 60°f or lower, meaning that a cooling tower cell designed for a 78°f wet bulb will be able to make 65°f 67°f water for 6,000 hours per year nearly 70% of the year. most cooling towers are capacity rated at a "standard" wet bulb temperature of 78°f. that means on the days when the wet. Cooling tower efficiency can be expressed as. μ = (ti to) 100 (ti twb) (1) where. μ = cooling tower efficiency (%) the common range is between 70 75%. ti = inlet temperature of water to the tower (oc, of) to = outlet temperature of water from the tower (oc, of) twb = wet bulb temperature of air (oc, of) the temperature difference.

How To Calculate Cooling Tower Efficiency This is calculated to be 30c. next, determine the wet bulb temperature. the wet bulb temperature in this example, is 20c. finally, calculate the cooling tower efficiency using the formula above: e = (h – c ) * 100 (h w) e = (50 – 30 ) * 100 (50 20) e = 66.66%. enter the hot water temperature, cold water temperature and wet bulb. At 60°f [15.6°c] wet bulb temperature, the cooling tower approach temperature ranges from 9.0°f (5.0°c) at design load to 2.8°f (1.5°c) at a 29% load (table 2). constant 100% heat rejection load (14°f [7.8°c] range) (table 3). between 30°f and 85°f (–1°c and 29°c) wet bulb temperature, the approach changes by a factor of six—and. Wet bulb (°f) (example) tower size factor. 4 cooling tower size varies inversely with wet bulb temperature. when heat load, range, and approach values are fixed, reducing . the design wet bulb temperature increases the size of the cooling tower — see . figure 7. this is because most of the heat transfer in a cooling tower occurs by virtue of. \(c\) is the cold water temperature (°c), \(w\) is the wet bulb temperature (°c). example calculation. consider a scenario where the hot water temperature is \(50°c\), the cold water temperature is \(30°c\), and the wet bulb temperature is \(20°c\). the cooling tower performance is calculated as follows: \[ e = \frac{(50 30) \times 100.