A room humidifier works as follows: a stream of air with 20% humidity and a dry bulb temperature equal to 20 °C is mixed with a stream of water also at 20 °C until saturation is reached. Then the saturated air stream passes through a heat exchanger where it is heated. Knowing that the flow rate of the air stream entering the humidifier is 100 m3/h and that the heat exchanger supplies 500 kcal/h to heat the saturated air stream, determine a) the minimum mass flow rate of the water stream to saturate the air stream. b) the temperature and humidity percentage of the air stream at the exit of the heat exchanger.
A room humidifier works as follows: a stream of air with 20% humidity and a dry bulb temperature equal to 20 °C is mixed with a stream of water also at 20 °C until saturation is reached. Then the saturated air stream passes through a heat exchanger where it is heated. Knowing that the flow rate of the air stream entering the humidifier is 100 m3/h and that the heat exchanger supplies 500 kcal/h to heat the saturated air stream, determine a) the minimum mass flow rate of the water stream to saturate the air stream. b) the temperature and humidity percentage of the air stream at the exit of the heat exchanger.
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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- A room humidifier works as follows: a stream of air with 20% humidity and a dry bulb temperature equal to 20 °C is mixed with a stream of water also at 20 °C until saturation is reached. Then the saturated air stream passes through a heat exchanger where it is heated. Knowing that the flow rate of the air stream entering the humidifier is 100 m3/h and that the heat exchanger supplies 500 kcal/h to heat the saturated air stream, determine
a) the minimum mass flow rate of the water stream to saturate the air stream.
b) the temperature and humidity percentage of the air stream at the exit of the heat exchanger.
Transcribed Image Text:Water
air
humidifier
Heat exchanger
hot and humid air
saturated
H, = 20 %
Tis = 20 °C
alr
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