I'm having a lot of trouble with an adiabatic mixing process.(adsbygoogle = window.adsbygoogle || []).push({});

This is what I know:

There's an airstream coming from outside and its temperature is T_{1}=5 'C, its relative humidity being [tex]\varphi[/tex]_{1}= 90% at a rate of 20 m^{3}/min.

Another airstream is coming from inside and its temperature is T_{2}= 25 ´C, relative humidity [tex]\varphi[/tex]_{2}= 50%, at the rate of 20 m^{3}/min.

The airstreams are mixed in a chamber with the pressure p = 1 bar.

I should find the densities of the first and second mixtures (meaning the airstreams including the water). This I've accomplished, the densities being [tex]\rho[/tex]_{1}=1.249 kg/m^{3}and [tex]\rho[/tex]_{2}= 1.162 kg/m^{3}. I've also found the mass rates for the water in both streams; [tex]^{.}[/tex]m_{w1}= 2.0 g/s and m[tex]^{.}[/tex]_{w2}= 3.8 g/s.

What I havent been able to find is this: the specific humidity [tex]\omega[/tex]_{3}of the mixed airstreams. I simply don't know what to do: I've tried finding first the specific humidities of the airstreams before mixing and stuff like that, but I just can't get the right result! This is what it should be: [tex]\omega[/tex]_{3}= 7.36*10^{-3}kg H_{2}O/kg air.

Can someone please help me?

I should also find the temperature after mixing, as well as the new relative humidity, but I don't know how to do that either...

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# Adiabatic mixing of airstreams

Can you offer guidance or do you also need help?

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