ACADs (08-006) Covered Keywords Turbine Auxiliaries, Mechanical Systems, Gates, Cranes and Hoists. Description Supporting Material

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

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

4 Turbine Auxiliaries Section 7.3 – Auxiliary Mechanical Equipment 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

5 Inlet Valves Section 7.3 – Auxiliary Mechanical Equipment

6 Mechanical Systems Section 7.3 – Auxiliary Mechanical Equipment 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

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

8 Valves and Gates Section 7.3 – Auxiliary Mechanical Equipment

9 Cranes and Hoists Section 7.3 – Auxiliary Mechanical Equipment

10 Questions? Section 7.3 – Auxiliary Mechanical Equipment