Metering Pump Station Flow Monitoring Presented by: Glenn Hummel - - PowerPoint PPT Presentation
Laser for Open Channel Flow Metering Pump Station Flow Monitoring Presented by: Glenn Hummel Presentation Objective Keep your Toolbox equipped with Flow Metering Solutions Introduce a New Technology for Open Channel Flow Measurement
Laser for Open Channel Flow Metering
Pump Station Flow Monitoring Presented by: Glenn Hummel
Keep your Toolbox equipped with Flow Metering Solutions
Flow Measurement
Station Flow Monitoring
Measurement (OCM) Technologies
Open Channel Flow Measurement (OCM)
– Both used Level Sensors: Floats, Bubblers, Pressure Transducers - all Contacting Ultrasonic (Non-Contacting)
– Velocity & Depth Sensors
Continuous Wave Doppler (CWD)
[the economical workhorse]
Pulsed Doppler (PD)
[higher accuracy, perf, & reliability at higher cost]
Contact Sensors
The drawbacks of Contacting Sensor technologies are:
– Blinding (loss of reading) – Silting (accuracy uncertainty) – Failure (damage / exposure)
– (cost)
– Sensor caused obstruction in flow – Debris, hydraulic issues
These drawbacks associated with contacting sensors have driven technology to provide
measurement solutions
Non-Contact vs Contact…Why?
– Blinding, Silting, Debris – Far fewer visits required by non-contacting solutions – Frequency & Costs (~$500 per site visit)
– Cannot get flushed down a sewer pipe if you are not in the sewer.
– Difficult Installations
– Shallow water depths with high velocities
– Permits / Traffic Control / Manpower
Non-Contact Radar
– Single Point, Surface Velocity Measurement does not yield velocity measurement representative of cross section – Dead band in ultrasonic level measurement – Required velocity profiling
–Only read velocity at the surface!
– Continuous Wave Doppler (CWD) – Pulsed Doppler (PD)
– Radar – Laser
Technology
measurement
Measurement
Basic Operation Sketch– Velocity Measurement
Laser Flow Sensor Original Laser Light, λ = 635 nm Return Doppler Signal Light Flowing Water Stream 45 Degree Angle θ ∆f = 2 V cosθ / λ V = λ * ∆f / (2 cosθ) where: ∆f = Doppler frequency shift V = Water velocity θ = 45 degrees λ = Laser wavelength V
14
Below Surface
Ultrasonic Level Measurement Laser Velocity Measurement Single Point Velocity Method
Below the surface 5000 Spectral Velocity Readings Return Doppler Signal Light
0-10 ft
exceeded by the time the signal reaches the bottom of the LaserFlow.
– Peak velocity is typically below the surface of the water at lower depths – Moves away from the water surface at higher depths
Solids
– Minimum 15 PPM
– 1/2” to 6” Below the surface in typical raw wastewater applications
Ultrasonic Level Measurement Laser Velocity Measurement Single Point Velocity Method
Ultrasonic Level Measurement Laser Velocity Measurement Multidepth Velocity Method
Ultrasonic Level Measurement Laser Velocity Measurement Multipoint Velocity Method
Ultrasonic Level Measurement Laser Velocity Measurement
Multipoint – Multidepth Velocity Method
When do you use single point velocity measurement?
When do you use Multipoint velocity measurement?
– TIENetTM CW area velocity sensor
– Variable Rate Data Storage
the laser window
TIENetTM Area velocity sensor connected to LaserFlow sensor Single cable from LaserFlow sensor
Level (USLS)
LaserFlow Fully Submerged
CWD sensor reading velocity Pressure Sensor reading depth
TIENet Area Velocity sensor with a longer Cable 1,10, 23M
Teledyne Proposed Solution Electronics
– 0.02 ft at 1 ft level change or less
– +/-15 ft/sec
– 0.5”
– 0.5” - 6” below the surface at 15 NTU /PPM
– 15 - 1,000 NTU/PPM
– Up to 140˚F
setup – 12 Weeks
plastic
hardware
– Kynar (corrosion resistant)
downstream pipe.
parallel to the water surface.
bracket
– Vertical adjustment
adjustment
Permanent Wall Mount Street Level Installation Tool
Street level installation alignment tabs
Max length 23 ft
Stability of Mounting hardware
How well does LaserFlow Technology Perform?
Examples of Actual Performance
Within 0.5%
Omaha LaserFlow vs ADFM
Difference = 0.36%
SAWPA comparison vs. OCSD reference Magmeter
LaserFlow Applications
– Billing – Inflow and Infiltration
– Permit Reporting:
– In plant pipes and channels
– Highly Accurate & Reliable Data Sets
– Harsh Chemicals and/or Environments
– Large debris
Summary
– Advanced Laser Velocity Measurement – Multipoint Subsurface Velocity Measurement – The only non-contact flow measurement system that reads below the surface – Both precise and accurate – Easy to install and maintain – Excellent Submerged flow measurement option – Flexible Platforms
Oh, by the way… …did you know?
to measure and log Water Temperature?
– Help indicate source or distinguish between inflow
Any application where “fixed” speed pumps are moving fluid from point A to point B. & Where the pumps are activated when specific volume thresholds are met in the source!
Purpose and Applications for Lift Station Monitoring
cannot be obtained
intervals
intervals are used
calculate
station
1 - Extrapolation Method
Calculation method in the 4501. Method used by the PC software
Pumplink uses the 5 preceding events and the 5 following events to calculate and determine “trend”
Summary Report
Monthly Report
Daily Report
Event Report
– Kip Koszewski kip@hesco-mi.com 586.978.7200 – Glenn Hummel glenn@hesco-mi.com 586.353.2242