ADVANTAGES AND LIMITATIONS OF VELOCITY COMPOUNDING

1 Advantages

1. Fewer number of stages are required and therefore, the initial cost is less.
2. The space required is less.
3. The pressure in the housing is considerably less which requires cheaper and thin casing for the turbine.

2 Limitations

1. The friction losses are larger due to the high velocity of steam.
2. The maximum blade efficiency and efficiency range decrease with the increase in the number of stages.
3. The power developed in each successive blade row decreases with increase in number of rows.
4. All the stages are not used with equal economy.