Question: 1. What is an essential difference between the shape number and specific speed of a hydro turbine? 2. Explain the difference in method of
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Mechanical Engineering -  Photovoltaic Technology (PV) and Hydropower

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Question: 1. What is an essential difference between the shape number and specific speed of a hydro turbine? 2. Explain the difference in method of operation between an impulse turbine and a reaction turbine. 3. Briefly explain "cauitation' that may occur in a reaction turbine. 4. Hydroelectric generation mayr approach 100% efficiency, whereas thermal power generation is about 3|] to 45%. Why is there such a difference? 5. List at least three benefits of hydropower generation to an electric power utility. 5. List at least three common negatiye environmental impacts of hydropower ?. Whyr do electricity utilities in Norway fear a very cold winter? 3. Which electricity-generating technologies are most likely to benefit from pumped storage on a national network, and why?

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