CE 704 · Chapter 6
Hydropower Engineering past question
6.3 Penstocks and Pressure shaft: importance, conditions of their application, general arrangement, hydraulic transients (water hammer), Computation of hydrodynamic pressure, sizing of penstock/pressure shaft and estimation of thickness of steel in penstock/pressure shaft
A hydropower plant has planned to use a steel penstock of length 600m having diameter of 0.8m to carry a discharge of 5m³/s. The static head available is 80m. The wave velocity, design stress and joint efficiency for the penstock pipe are 1200m/s, 1326kg/cm² and 85% respectively. What thickness of the penstock pipe would you recommend for the power plant if the gate closure time is 30 seconds? [8]