Question

a.) how hydraulic energy differ from mechanical energy?
b.) How draft tube increase the efficiency of reaction turbine?
c.) Explain very briefly in what way a hydraulic impulse turbine differs fundamentally from a reaction turbine?​

Answer 1

Answer:

1) Hydroelectric power is a renewable energy source which harnesses the power of moving water to produce electricity. ... A hydroelectric dam converts the potential energy stored in a water reservoir behind a dam to mechanical energy—mechanical energy is also known as kinetic energy.

2) By placing a draft tube (also called a diffuser tube or pipe) at the exit of the turbine, the turbine pressure head is increased by decreasing the exit velocity, and both the overall efficiency and the output of the turbine can be improved.

3) The main difference between the impulse turbine and the reaction turbine is that, in the former, there is a pressure drop across the fixed blades only, whereas in the latter, there is a pressure drop across both the fixed and the moving blades. ... The moving blades of impulse turbines do not have a change in flow area.

Answer 2

1. Hydroelectric power is a renewable energy source which harnesses the power of moving water to produce electricity. ... A hydroelectric dam converts the potential energy stored in a water reservoir behind a dam to mechanical energy—mechanical energy
2. By placing a draft tube (also called a diffuser tube or pipe) at the exit of the turbine, the turbine pressure head is increased by decreasing the exit velocity, and both the overall efficiency and the output of the turbine can be improved.
3. The main difference between the impulse turbine and the reaction turbine is that, in the former, there is a pressure drop across the fixed blades only, whereas in the latter, there is a pressure drop across both the fixed and the moving blades. ... The moving blades of impulse turbines do not have a change in flow area.