1. Engineering Technology Division
Power Plant Construction and QA/QC
Section 7.3 – Auxiliary Mechanical Equipment

2. Hydroelectric Plant Auxiliaries Turbine Auxiliaries Mechanical Systems
Section 7.3 – Auxiliary Mechanical Equipment
Overview
Hydroelectric Plant Auxiliaries
Turbine Auxiliaries
Mechanical Systems
Gates
Cranes and Hoists

3. Most Turbines Operate at Constant Speed Speed Following
Section 7.3 – Auxiliary Mechanical Equipment
Turbine Auxiliaries
Most Turbines Operate at Constant Speed
Speed Following
Newer Units are Capable of Variable Speed
Load or Speed Following
Load Following when beneficial
Governor controls the inlet gate – 10% change
Turbine Inlet Valve
Shut for Emergency or Maintenance
Spherical > 500 ft head
Butterfly < 500 ft head

4. Section 7.3 – Auxiliary Mechanical Equipment
Inlet Valves

5. Lubricating - bearings Compressed Air - controls Fire Protection
Section 7.3 – Auxiliary Mechanical Equipment
Mechanical Systems
Cooling Water - oil
Lubricating - bearings
Compressed Air - controls
Fire Protection
Dewatering and Filling - maintenance
Drainage - protection
HVAC (heating, ventilation and air conditioning)
Oil Storage and Purification
Potable Water - drinking
Sanitary – bathrooms, sinks

6. Valves and Gates Trash Racks Intake Gate Maintenance Bulkhead
Section 7.3 – Auxiliary Mechanical Equipment
Valves and Gates
Trash Racks
Intake Gate
Maintenance Bulkhead
Draft Tube Gate
Spillway Gate

7. Section 7.3 – Auxiliary Mechanical Equipment
Valves and Gates

8. Section 7.3 – Auxiliary Mechanical Equipment
Cranes and Hoists

9. Section 7.3 – Auxiliary Mechanical Equipment
Questions?