10.5-2. Minimum Gas Rate and Height of Water-Cooling Tower. It is planned to cool water from 110°F to 85°F in a packed countercurrent water-cooling tower using entering air at 85°F with a wet bulb temperature of 75°F. The water flow is 2000 lbh ft² and the air flow is 1400 lb air/h ft². The overall mass-transfer coefficient is KG a = 6.90 lb mol/h ſt³· atm. . (a) Calculate the minimum air rate that can be used. (b) Calculate the tower height needed if the air flow of 1400 lbm air/h - ft² is used.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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10.5-2. Minimum Gas Rate and Height of Water-Cooling Tower. It is planned to cool
water from 110°F to 85°F in a packed countercurrent water-cooling tower using
entering air at 85°F with a wet bulb temperature of 75°F. The water flow is 2000
lb/h ft² and the air flow is 1400 lb air/h ft2. The overall mass-transfer
coefficient is KG a = 6.90 lb mol/h · ſt³ · atm.
(a) Calculate the minimum air rate that can be used.
(b) Calculate the tower height needed if the air flow of 1400 lb air/h ft² is
used.
.
Transcribed Image Text:10.5-2. Minimum Gas Rate and Height of Water-Cooling Tower. It is planned to cool water from 110°F to 85°F in a packed countercurrent water-cooling tower using entering air at 85°F with a wet bulb temperature of 75°F. The water flow is 2000 lb/h ft² and the air flow is 1400 lb air/h ft2. The overall mass-transfer coefficient is KG a = 6.90 lb mol/h · ſt³ · atm. (a) Calculate the minimum air rate that can be used. (b) Calculate the tower height needed if the air flow of 1400 lb air/h ft² is used. .
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