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
