Inclined part of penstock of a hydropower dam is 100 m long. This penstock has an inclination angel 45 ⁰ with the horizontal (see the figure below). This is connected to the turbine supplying water at 90 m ³ /s. Inlet of penstock to the water surface has height of 30 m. Turbo-generator efficiency of this hydro power plant system is 90%. Now answer the following questions.

1. What type of hydro power plant is this? (i) Pumped storage (ii) Run off river (iii) Impoundment (iv) Recreation (v) Irrigation

2. What is the actual head of this plant? (i) 30 m (ii) 50 m (iii) 81 m (iv) 101 m (v) 121 m

3. In terms of size what type power plant is this? (i) Mini (ii) Micro (iii) Pico (iv) None (v) All

4. What type of turbine you have to use? (i) Pelton (ii) Francis (iii) Turgo (iv) All (v) None

5. How will you categorize this dam? (i) High-head (ii) Medium-head (iii) Low-head (iv) Average-head (v) No-head

6. Calculate the plant?s capacity (nameplate power, MW)? (i) 52 (ii) 62 (iii) 72 (iv) 82 (v) 92

7. If the dam operates at 60% of its capacity on average, how much energy (gigawatt hour, approx.) does it produce in a year? (i) 131 (ii) 231 (iii) 331 (iv) 431 (v) 531

8. If each generator to be used has rated capacity of 10 MW, approximately how many generators you need to install? (i) 6 (ii) 9 (iii) 12 (iv) 15 (v) 20

1. How many people should this energy support, assuming average community consumption of 3 megawatt hour per year per person?

Head 25 m 30 m Reservoir DAM Pressure tunnel 100 m Water flow Surge- tank Gate Penstock 35 m Inlet valve Electric generator Transformer Water flow raotes shaft Turbine Draft tube Power lines Electric cable