Liquid water enters a cooling tower operating at steady state at 39°C with a mass flow rate of 105 kg/h. Cooled water at 25°C exits the cooling tower at the same mass flow rate. Makeup water is supplied at 23°C. Atmospheric air enters the tower at 30°C, 1 bar, 35% relative humidity. A saturated moist air stream exits at 34°C, 1 bar.

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part a answer is correct and part b is incorrect 

 

Liquid water enters a cooling tower operating at steady state at 39°C with a mass flow rate of 105 kg/h. Cooled water at 25°C exits
the cooling tower at the same mass flow rate. Makeup water is supplied at 23°C. Atmospheric air enters the tower at 30°C, 1 bar,
35% relative humidity. A saturated moist air stream exits at 34°C, 1 bar.
Determine:
(a) the mass flow rates of the dry air and makeup water, each in kg/h.
(b) the rate of exergy destruction within the cooling tower, in kW, for To 23°C.
Part A
Your answer is correct.
Determine the mass flow rates of the dry air and makeup water, each in kg/h.
ma =
86900
kg/hr
mmw =
2217.68
kg/hr
Both need part
Parti
* Your answer is incorrect.
Determine the rate of exergy destruction within the cooling tower, in kW, for To = 23°C.
Éa = i
20.31
kW
Transcribed Image Text:Liquid water enters a cooling tower operating at steady state at 39°C with a mass flow rate of 105 kg/h. Cooled water at 25°C exits the cooling tower at the same mass flow rate. Makeup water is supplied at 23°C. Atmospheric air enters the tower at 30°C, 1 bar, 35% relative humidity. A saturated moist air stream exits at 34°C, 1 bar. Determine: (a) the mass flow rates of the dry air and makeup water, each in kg/h. (b) the rate of exergy destruction within the cooling tower, in kW, for To 23°C. Part A Your answer is correct. Determine the mass flow rates of the dry air and makeup water, each in kg/h. ma = 86900 kg/hr mmw = 2217.68 kg/hr Both need part Parti * Your answer is incorrect. Determine the rate of exergy destruction within the cooling tower, in kW, for To = 23°C. Éa = i 20.31 kW
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