Problem 2 Tin TG In a cooling tower, water enters a packed tower from top at 50 °C and should leave at 20 °C by contacting with air flowing counter-currently at inlet temperature of 20 °C and humidity of 20%. The liquid flows at the rate of 0.275 kg/m's and the air at 0.837 kg/m²s. Given that: the latent heat of water at 0 °C is 2495 kJkg, specific heat capacity of dry air is 1.003 kJkg.C, specific heat capacity of water vapor is 2.006 kJkg.C the height of transfer unit (HTU) is 3.485 provide values of any necessary information from your knowledge without asking 1. Calculate the mass flowrate of dry air per unit area.) Estimate the humid heat and enthalpy of the inlet air stream. Estimate the enthalpy of the equilibrium air-vapor system for the following temperature values: 20, 26, 32, 38, 44, and 50 °C. Estimate the two end-point of the operating line. Find the values of gas enthalpies corresponding to the temperature values in question 3. 5. Tabulate the values needed for estimation of number of transfer units (NTU) without performing integration.
Problem 2 Tin TG In a cooling tower, water enters a packed tower from top at 50 °C and should leave at 20 °C by contacting with air flowing counter-currently at inlet temperature of 20 °C and humidity of 20%. The liquid flows at the rate of 0.275 kg/m's and the air at 0.837 kg/m²s. Given that: the latent heat of water at 0 °C is 2495 kJkg, specific heat capacity of dry air is 1.003 kJkg.C, specific heat capacity of water vapor is 2.006 kJkg.C the height of transfer unit (HTU) is 3.485 provide values of any necessary information from your knowledge without asking 1. Calculate the mass flowrate of dry air per unit area.) Estimate the humid heat and enthalpy of the inlet air stream. Estimate the enthalpy of the equilibrium air-vapor system for the following temperature values: 20, 26, 32, 38, 44, and 50 °C. Estimate the two end-point of the operating line. Find the values of gas enthalpies corresponding to the temperature values in question 3. 5. Tabulate the values needed for estimation of number of transfer units (NTU) without performing integration.
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
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:Problem 2
Tin
TG
In a cooling tower, water enters a packed tower from top at 50 °C and should leave at 20 °C by
contacting with air flowing counter-currently at inlet temperature of 20 °C and humidity of 20%.
The liquid flows at the rate of 0.275 kg/m's and the air at 0.837 kg/m²s.
Given that: the latent heat of water at 0 °C is 2495 kJkg,
specific heat capacity of dry air is 1.003 kJkg.C,
specific heat capacity of water vapor is 2.006 kJkg.C
the height of transfer unit (HTU) is 3.485
provide values of any necessary information from your knowledge without asking
1. Calculate the mass flowrate of dry air per unit area.)
Estimate the humid heat and enthalpy of the inlet air stream.
Estimate the enthalpy of the equilibrium air-vapor system for the following temperature
values: 20, 26, 32, 38, 44, and 50 °C.
Estimate the two end-point of the operating line. Find the values of gas enthalpies
corresponding to the temperature values in question 3.
5. Tabulate the values needed for estimation of number of transfer units (NTU) without
performing integration.
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