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Mixing Moist Streams of Air

Mixing Moist Streams of Air

Mixing Moist Streams of Air

(OP)
Hi there,

I'm trying to determine how to go about attacking this problem

I have 2 streams of air mixing, and I'm trying to find the temperature and relative humidity of the third stream.

Stream 1:  2bar, 20C, 40%rh, and 1kg/s
Stream 2:  1bar, 20C, 4kg/s

So I know I can find all my values for the first stream, but the second stream doesn't give me enough to find it on the psychometric charts.

I've tried energy and mass balance equations but other than knowing the mass of the third air flow, I'm not sure how to attack this.

Thanks

RE: Mixing Moist Streams of Air

if you don't know how much moisture is being carried in by  approximately 4/5th of the flow, why bother?  The problem is underdetermined.

RE: Mixing Moist Streams of Air

Also, how are streams 1&2 smart enough to mix into stream 3 when they are at different pressures?

RE: Mixing Moist Streams of Air

(OP)
Very, very, very true...I hadn't thought about the pressure differences, unless the third stream is in a much larger pipe so has a lower pressure.   

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