The cooling tower CT capacity in tons of refrigeration TR an

The cooling tower (CT) capacity in tons of refrigeration (TR) and b. The effectiveness using the following data: - Water flow rate through CT: 120 m^3/h - Specific heat of water: 1 kCal/kg degree C - Inlet water temperature: 37 degree C - Outlet water temperature: 32degree C - Ambient wet bulb temperature (WBT): 29degree C

Solution

Considering that the tower doesnt follow evapouration:

a)Water flow rate = m = 120 m³/hr = 264 554.71 lb/hr

Specific heat of water =C_p =1 Kcal/Kg⁰C = 4.19 Kj/Kg⁰C

Change in Temperature = dT = 5⁰C
Cooling tower capacity = mdT (Btu/hr)

= 1322773.55 Btu/hr

= 110.23 TonR

b) Effectiveness of cooling tower = = (t_i - t_o) 100 / (t_i - t_wb)

= (37-32)*100/(37-29)

=62.5%