Cooling Tower Flashcards
1
Q
Range, T_R
-reduction in the temperature of the water through the cooling tower.
A
t_3 - t_4
2
Q
Approach, T_a
A
t_4-t_wb1
3
Q
make-up water, mw5 (AIR)
A
ma(W2-W1)
4
Q
make-up water, mw5 (WATER)
A
m3-m4
5
Q
energy balance
A
m_3cpwt_3 + m_ah1 + m_5cpwt_5 = m_4cpwt_4 + m_ah2
6
Q
heat balance
A
ma(h2-h1) = m_3cp(t_3-t_4)
7
Q
WATER EVAPORATED
A
ma(W2-W1)
m3-m4
WATER EVAPORATED = MAKE UP WATER
8
Q
Cooling tower efficiency, e_ct
A
t_r/[t_r + t_a]
[t3-t4]/[t3-twb1]
