Air at T1 = 32°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T2 = 7°C, p2 = 1 bar. A single mixed stream exits at T3 = 17°C, p3 = 1 bar. Neglect kinetic and potential energy effects

Determine

(a) the relative humidity and temperature, in °C, of the exiting stream.

4.5kg/min

Explanation:

Given parameters

if we take  

The mass flow rate of the second stream =

The mass flow rate of mixed exit stream =

Now from mass conservation

The temperature of the mixed exit stream given as

Therefore the mass flow rate of second stream will be 4.5 kg/min.

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