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### Individual

1. 1. Presented By Md. Abu Ali Al Hossain Id. No:110303006
2. 2. Hydroelectric Power Plants In hydroelectric power station potential and kinetic energy of stored water is converted into electric energy. 25% of electricity generation capacity in world is provided by hydel power plant. MULTIPURPOSE OF HYDEL PROJECT For irrigation of agricultural land. For navigation. For fisheries and tourism. For flood control. For civil water supply. For generation of electricity.
3. 3. Basic Elements of Hydel Power Plant Reservoir Dam Intake For bay Surge tank Penstock Spillway Turbine Powerhouse
4. 4. Hydroelectric Power Plants
5. 5. Classification Of Hydel Power Plant According to availability of water:- a) Run-off river plant without poundage b) Run-off river plant with poundage c) Storage plant d) Pump storage plant According to head :- a) Low head plant b) Medium head plant c) High head plant According to load :- a) Base load plant b) Peak load plant
6. 6. Classification Of Hydel Power Plant According to plant capacity:- a) Microhydel plant (up to 5 MW ) b) Medium capacity plant ( 5-100 MW ) c) High capacity plant (100 MW ) d) super plant ( above 100 MW ) According to place of power house:- a) Surface power house plant b) Under ground power house plant According to turbine specific speed:- a) High specific speed plant b) Medium specific speed plant c) Low specific speed plant
7. 7. Calculating Available Power A simple formula for approximating electric power production at a hydroelectric plant is: P= ρhrgk Where P is Power in watts, ρ is the density of water (~1000 kg/m3), h is height in meters, r is flow rate in cubic meters per second, g is acceleration due to gravity of 9.8 m/s2, k is a co-efficient of efficiency ranging from 0 to 1.
8. 8. Advantages & Disadvantages OF Hydel Power Plant This plant is free from pollution. Its operation and maintenance cost is less. It has no stand by losses. Unit cost of power is less. Hydraulic turbines can be started speedily. The plant has longer service life. No fuel is required. No change in efficiency with the age. Disadvantages of hydel power plant Initial cost of dam and plant is high. The availability of power from it is not much reliable. Loss of forest creates environmental problems. Due to evaporation , considerable water is lost. Time required for construction is more.