6. An air-conditioning system operates at a total pressure of 95 kPa and consists of a heating section and a humidifier that supplies wet steam at 100 °C. Air enters the heating section at 10 °C and 70 percent relative humidity at a rate of 35 m/min, and it leaves the humidifying section at 20 °C and 60 percent relative humidity. The specific heat capacity at constant pressure of air is 1.005 kJ/(kg- °C) and the gas constant of air is 287 J/(kg. °C). Determine (a) the specific humidity and specific enthalpy of air before entering the heating section. (b) the specific humidity and specific enthalpy of air after leaving the humidifying section. (c) the temperature and relative humidity of air when it leaves the heating section.
6. An air-conditioning system operates at a total pressure of 95 kPa and consists of a heating section and a humidifier that supplies wet steam at 100 °C. Air enters the heating section at 10 °C and 70 percent relative humidity at a rate of 35 m/min, and it leaves the humidifying section at 20 °C and 60 percent relative humidity. The specific heat capacity at constant pressure of air is 1.005 kJ/(kg- °C) and the gas constant of air is 287 J/(kg. °C). Determine (a) the specific humidity and specific enthalpy of air before entering the heating section. (b) the specific humidity and specific enthalpy of air after leaving the humidifying section. (c) the temperature and relative humidity of air when it leaves the heating section.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:6.
An air-conditioning system operates at a total pressure of 95 kPa and consists of a heating
section and a humidifier that supplies wet steam at 100 °C. Air enters the heating section
at 10 °C and 70 percent relative humidity at a rate of 35 m'/min, and it leaves the
humidifying section at 20 °C and 60 percent relative humidity. The specific heat capacity
at constant pressure of air is 1.005 kJ/(kg: °C) and the gas constant of air is 287 J/(kg: °C).
Determine
(a) the specific humidity and specific enthalpy of air before entering the heating section.
(b) the specific humidity and specific enthalpy of air after leaving the humidifying section.
(c) the temperature and relative humidity of air when it leaves the heating section.
(d) the rate of heat transfer in the heating section.
(e) the rate at which water is added to the air in the humidifying section.
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