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

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

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

Section 7.3 – Auxiliary Mechanical Equipment Inlet Valves

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

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

Section 7.3 – Auxiliary Mechanical Equipment Valves and Gates

Section 7.3 – Auxiliary Mechanical Equipment Cranes and Hoists

Section 7.3 – Auxiliary Mechanical Equipment Questions?