Mixing of two air streams, Using Thermo Utilities, MS Excel Add-ins

 

In an air conditioning plant, outdoor air mixes with recirculated air. Calculate the specific enthalpy, moisture content and dry-bulb temperature of the mixed air stream. Outdoor air:

Dry-bulb temp. = 5 C

Moisture content = 0.002

Mass flow = 2 kg/s

Recirculated air:

Dry-bulb temp. = 21 C

Moisture content = 0.012

Mass flow = 6 kg/s


Inputs

Units

Outdoor air, DBT

5,00

C

Outdoor air, moisture content

0,002

.

Outdoor air, mass flow rate

2,00

kg/s

Recirculated air, DBT

21,00

C

Recirculated air, moisture content

0,010

.

Recirculated air, mass flow rate

6,00

kg/s

Outputs

mass flow rate of the mixture

8,00

kg/s

moisture content of the mixture

0,0080

.

specific enthalpy of the outdoor air

10,0376

kJ/kg

specific enthalpy of the recirculated air

46,4336

kJ/kg

specific enthalpy of the mixture

37,3346

kJ/kg

Dry-bulb temp. of the mixture

17,0398

C


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