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Presentation transcript:

Vibration Monitoring & Machine Protection Systems Cooling Tower Vibration Monitoring

Vibration Monitoring & Machine Protection Systems Closed Loop Cooling Tower System

Vibration Monitoring & Machine Protection Systems Types of Mechanical Draft Towers

Vibration Monitoring & Machine Protection Systems Typical Power Plant

Vibration Monitoring & Machine Protection Systems Cooling Towers At Nuclear Plants

Vibration Monitoring & Machine Protection Systems Cooling Tower Critical Components Fans Gear Boxes Motors

Vibration Monitoring & Machine Protection Systems Cooling Tower Failures - Blades

Vibration Monitoring & Machine Protection Systems Cooling Tower Failures - Gearboxes

Vibration Monitoring & Machine Protection Systems Cooling Tower Application Issues –Towers are very flexible –High vibration values during startup. –Complex gearbox (1800/120 RPM) –Neighboring cells effect measurement –Starting cell 2 can shut down cell 1 –Reversing fans in cold climates –Water build up in blades –Speeds are slow and based on diameter –Distance to control room –Corrosion from bad pH

Vibration Monitoring & Machine Protection Systems Existing “Earthquake” Sensors –Calibrated by dropping sledgehammer –Do not always trip –Some use Ball and Pedestal –Operators do not like climbing the tower –Alarm value usually set to high to help –No provision for Startup (Tx) –No OK Circuit

Vibration Monitoring & Machine Protection Systems CMCP-500 Series Monitoring –Transmitter or Monitor –24 VDC Powered –Trip Multiply Standard –OK Circuit –ADC Option –RF Link option –Fiberglass or SS NEMA 4X Enclosures

Vibration Monitoring & Machine Protection Systems 12 Cell Cooling Tower Monitoring System –Typical Rotating Machinery and Sensors Circulating Water Pumps (2) –6 Accelerometers –4 Eddy Probe Systems –2 Phase Cooling Tower Pumps (2) –6 Accelerometers Gearbox and Fan (12) –12 Accelerometers or Velocity Motor and Jackshaft (12) –12 Accelerometers (Output Shaft)

Vibration Monitoring & Machine Protection Systems 10 Cell Cooling Tower Monitoring System

Vibration Monitoring & Machine Protection Systems Dual Path Monitoring Displacement (mils) Running speed (1X) Blade passing Blade multiples Velocity (in/sec) Gear mesh Bearings

Vibration Monitoring & Machine Protection Systems Dual Path Monitoring System –CMSS793V Transducer –CMCP-602L Cable –CMCP-5302 Monitoring System w/ CMCP V-02R-XXX-XXX –0 to 1.0 in/sec (0 to 25 mm/sec) CMCP V-03-XXX-XXX –0 to 15 mils (0 to 375 microns)

Vibration Monitoring & Machine Protection Systems Circulating Water Pumps

Vibration Monitoring & Machine Protection Systems Where are the Cooling Towers ? Power Generation –Steam –Nuclear –Geothermal Hydrocarbon Processing (HPI) –Refineries –Chemical Plants Food Processing –Tropicana –Campbell Soup Large Buildings (HVAC)