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Q3. Hydro power a. Describe, with the aid of a hand drawn diagram, a pelton hydro turbine. Explain what type of hydro site this would be appropriate for. [10 marks] b. Based on the following information, find the Net Present Value of the net annual income stream, and the Lifetime Cost, for a site with two possible turbine choices. Which turbine provides the best lifetime cost? Site characteristics: H=10m, Q=3m³/s, g=9.81m/s², p=1000kg/m³ Financial variables: r=4%, sale price of generated electricity=8p/kWh, project lifetime n=20 years Turbine choice 1: 300kW (maximum for the site conditions), efficiency n=90%, operates all year round, capital cost £0.35m for turbine and balance of plant, installation cost £0.1m. Annual operation and maintenance cost 1% of turbine and balance of plant capital cost. Turbine choice 2: 200kW (less than the maximum given the site conditions), efficiency n=94%, operates all year round, capital cost £0.18m for turbine and balance of plant, installation cost £0.03m. Annual operation and maintenance cost 1.5% of turbine and balance of plant capital cost. [15 marks]