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  3. 2. an engineer doing an audit finds that liquid wa

2. An engineer doing an audit finds that liquid water from a process enters the cooling...

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Mechanical Engineering

2. An engineer doing an audit finds that liquid water from aprocess enters the cooling tower at 80 F and with a volumetric flowof 25 gpm and exits at 70 F. Air enters the tower at 80 F andrelative humidity of 70% . Air exits the tower at 90 F and 90%relative humidity. The tower does not use make up water.

Determine:

a. The air inlet and outlet conditions in the table

Condition

Tdb

(F)

φ

W (lb water/lbair)

H

(Btu/lb)

Vft3/lb)

inlet(air)

80

70

outlet( exit)

90

90

b. Required air flow (cfm)
c. Amount of water at the outlet (not equal to the inlet)(gpm).
d. Heat removed to water

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