Page 51 - Advanced Mine Ventilation

34 Advanced Mine Ventilation

2.3 Three airways in parallel have the following characteristics:

Airway Size L K
1 20 6 900 50
2 18 6 1000 60
3 15 8 1100 70

The total air quantity in all three airways is 120,000 CFM. Calculate the flow in each
airway. Plot the characteristic curve (H ¼ RQ 2 ) for each airway and the combined curve
for all three airways.
2.4 Repeat the problem (2.3) by arranging airways 1, 2, and 3 in series and plot their individual
and combined characteristics.

References

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