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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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Water to the turbine is allowed through the
Pipes
Sluice gates
Canals
Pumps
Sluice gates
Quick Summary: In hydroelectric power plants, sluice gates are control mechanisms used to regulate the flow of water from the reservoir or penstock into the turbine. They act as essential valves to start, stop, or adjust the water discharge based on load demand.
In hydroelectric power plants, sluice gates are control mechanisms used to regulate the flow of water from the reservoir or penstock into the turbine. They act as essential valves to start, stop, or adjust the water discharge based on load demand.
P=η⋅ρ⋅g⋅Q⋅H — Relationship where Q is the discharge regulated by the sluice gate, and P is power output
Q=Cd⋅A⋅2gH — Discharge through a gate where Cd is the coefficient of discharge
The sluice gate operates by moving a vertical gate (typically a heavy sliding steel plate) that blocks or opens the water passage. By adjusting the vertical position of the gate, the discharge (Q) of water directed to the turbine is controlled, which directly governs the turbine's rotational speed and power output.
Sluice gates are essential for emergency shutdown of turbine flow.
They provide coarse control of the water mass flow rate reaching the turbine runners.
Hydraulic or electric actuators are typically used to operate the gates.
Precise flow control capability.
High structural strength to withstand hydrostatic pressure.
Prone to wear and tear due to high-velocity water flow (cavitation).
Requires significant maintenance for lubrication and seal integrity.
Hydroelectric dam intakes.
Irrigation canal distribution systems.
Water treatment plant inflow regulation.
Pipes (penstocks) convey water but do not inherently control the flow rate; they are the conduit.
Pumps are used to add energy to fluids (lifting water) and are not used to direct water to a turbine (which extracts energy).
Canals are open conduits for water transport, not specific flow control devices at the turbine interface.
B is correct — Sluice gates are mechanical barriers used to regulate the volume of water permitted to flow into the turbine intake.
Always distinguish between conduits (pipes/canals) and control devices (sluice gates/valves/wicket gates) in power plant questions.