Cooling Tower Vibration Monitoring www stiweb com Vibration
Cooling Tower Vibration Monitoring www. stiweb. com Vibration Monitoring & Machine Protection Systems
Closed Loop Cooling Tower System www. stiweb. com Vibration Monitoring & Machine Protection Systems
Types of Mechanical Draft Towers www. stiweb. com Vibration Monitoring & Machine Protection Systems
Typical Power Plant www. stiweb. com Vibration Monitoring & Machine Protection Systems
Cooling Towers At Nuclear Plants www. stiweb. com Vibration Monitoring & Machine Protection Systems
Cooling Tower Critical Components • Fans • Gear Boxes • Motors www. stiweb. com Vibration Monitoring & Machine Protection Systems
Cooling Tower Failures - Blades www. stiweb. com Vibration Monitoring & Machine Protection Systems
Cooling Tower Failures - Gearboxes www. stiweb. com 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 p. H www. stiweb. com 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 www. stiweb. com 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 4 X Enclosures www. stiweb. com 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) www. stiweb. com Vibration Monitoring & Machine Protection Systems
10 Cell Cooling Tower Monitoring System www. stiweb. com Vibration Monitoring & Machine Protection Systems
Dual Path Monitoring Displacement (mils) • Running speed (1 X) • Blade passing • Blade multiples Velocity (in/sec) • Gear mesh • Bearings www. stiweb. com Vibration Monitoring & Machine Protection Systems
Dual Path Monitoring System – CMSS 793 V Transducer – CMCP-602 L-32 -01 -01 Cable – CMCP-5302 Monitoring System w/ • CMCP-530 -100 V-02 R-XXX – 0 to 1. 0 in/sec (0 to 25 mm/sec) • CMCP-535 -100 V-03 -XXX – 0 to 15 mils (0 to 375 microns) www. stiweb. com Vibration Monitoring & Machine Protection Systems
Circulating Water Pumps www. stiweb. com 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) www. stiweb. com Vibration Monitoring & Machine Protection Systems
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