HEATING, VENTILATING,+AC ANAL...EBOOK>I<
HEATING, VENTILATING,+AC ANAL...EBOOK>I<
6th Edition
ISBN: 2819480255750
Author: Mcquiston
Publisher: INTER WILE
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Chapter 4, Problem 4.17P

Carbon dioxide is being generated in an occupied space at the rate 0.25 cfm (0.118 l/s) and outdoor air with a CO2 concentration of 220 ppm is being supplied to the space at the rate of 900 cfm (0.425 m3/s). What will be the steadystate concentration of CO2 in ppm if complete mixing is assumed?

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Outside air at 30 C drybulb &  25 C wetbulb temperature flowing at a rate of  25,000 liters/min is mix with colder air at 20 C drybulb &  18 C wetbulb temperature flowing at a rate 70,000 liters/min.  After mixing , the mxture  undergoes sensible heating up to 40 C . Compute the heating needed in kW. Plot the process on the Psychrometric chart and label it completely.

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