CE 704 · Chapter 3
Hydropower Engineering past question
3.4 Methods of fixing installed capacity of a hydropower plant
A hydropower plant is to be planned in a Nepalese river, where the mean monthly flows for a typical year are as follows:
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Q(m³/s) | 4.4 | 3.9 | 3.4 | 4.2 | 5.6 | 16.5 | 78.1 | 108.9 | 52.8 | 22.0 | 9.9 | 6.4 |
Other data pertaining to the plant are as follows: Design Discharge = 18 m³/s; Full Supply Level = 2250 masl; Turbine Center line = 1650 masl; Dia of 4.0 km long tunnel = 3.0 m, f=0.014; Dia of 1.0 km long penstock = 2.2 m, f=0.012; Hydraulic Efficiency = 95%; turbine efficiency = 93%; Generator Efficiency; Transformer efficiency = 99%. Considering only Frictional loss, a) Compute installed capacity, primary and secondary energy to be produced from the power plant assuming that 10% minimum flow to be released downstream. What is plant factor? [5+2] b) The developer is interested to develop a daily peaking reservoir for 4 hours. What will be the capacity of the reservoir to satisfy daily peaking requirement? [3]