Bienvenue

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Welcome Bienvenue Willkommen Bienvenido ?????
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ESTA aMT Conference Future Trends - Clamp-On
Flow Metering

• The Market
• Technology Operating Principals
• Typical Configurations
• Applications

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Clamp-On flow metering The Market

• The markets for Clamp-On Ultrasonic flow
  metering are established
• Significant potential for Growth
• Major cost savings over technologies requiring
  in-line installation
• Up to 90 percent with additional installation
  operational benefits!

• Portable Ultrasonic Meters
• The only realistic option for temporary
  applications
• One unit can measure any pipe diameter.
• Non intrusive
• No system downtime

• Dedicated Meters
• Non intrusive
• Low cost. Particularly on large pipes
• No moving parts
• Simple low cost installation
• No down time for maintenance
• No Pressure Drop - Energy efficient!
• Result is Low lifetime cost

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Clamp-On flow metering The Theory
There are 2 Ultrasonic technologies used- Time
of Flight and Doppler

• Time of Flight is suitable for clean liquids lt 2
  particles or contaminates
• Doppler is only suitable for contaminated or
  aerated liquids.

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Clamp-On flow metering Theory - Time of Flight

• Time of Flight Ultrasonic Meters measure the
  Transit Time of a beam of Ultrasound
• Flow velocity is calculated from the difference
  in time taken for the sound to travel either
  upstream against the flow or downstream.
• This time difference is extremely small for
  example 30 nanoseconds (30 x 10-9 sec) for a flow
  of 1 metre/sec in a 100mm pipe.
• In order to achieve accuracy particularly on
  smaller pipes with very low flows it is necessary
  to have a system that will resolve time
  differences of less than 0.5 nanosecond. Nominal
  accuracy for most Clamp-On systems is between
  1-3 of flow rate above 0.3metres/sec.

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Clamp-On flow metering Theory - Doppler

• When ultrasound hits a moving particle or gas
  bubble The reflected sound can be detected and
  the frequency shift measured.
• The frequency change is proportional to flow
  velocity which is converted to volumetric flow
  rate by multiplying by the cross sectional area
  of the pipe.

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Clamp-On flow metering Typical Configurations
Portable and Dedicated or Fixed Clamp-On
Instruments and Meters for Flow Measurement

• Dedicated Clamp-On Flow and Heat
• Meters
• Time of Flight meters for clean liquids
• Doppler portable meters for dirty liquids
• Mains, 24V DC, Battery Powered
• aMT and BEMS compatible
• LCD or Graphics Displays
• Current, Pulse, RS 232/485 outputs
• Blind units pre-programmed for fit and forget
  applications
• Prices ranging from 800 to 3000.
• But Technology is driving prices down!

• Portable Clamp-on instruments
• Time of Flight meters for clean liquids
• Doppler portable meters for dirty liquids
• LCD or Graphics Displays
• Battery Powered
• Data Logging
• Portable meters range in price from 600- 6000
  depending on facilities offered and the level of
  performance.
• But Technology is driving prices down!

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Clamp-On flow metering Typical Configurations
Portable Ultrasonic Meters
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Clamp-On flow metering Typical Configurations
Dedicated or Fixed Meters
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Clamp-On flow meteringApplications
Portable and Dedicated Instruments and Meters
for the following areas

• Chilled Water/LPHW/MTHW flow metering
• Thermal energy flow measurements when combined
  with diff temp measurement
• System commissioning
• Temporary monitoring (Trend/Consumption)
• Flow confirmation
• Effluent discharge measurements
• Plant Diagnostics Leak detection

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Improving energy efficiency using Clamp-on meters

• The low cost installation of a clamp-on meters to
  monitor flow and to identify instantly any change
  in performance a significant step towards
  ensuring energy efficient operation.
• Portable meters enable fast accurate energy
  audits.
• System balancing and defective in-line meter
  replacement can be performed without draining
  down.
• Leak Detection and water wastage can be simply
  tracked.
• Logging the use of Heat or coolth process and
  building services can now be achieved using
  clamp-on heat meters, driving down the cost of
  secondary metering.

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Case Study- Pump Efficiency

• A Micronics Portaflow 300 was used to measure the
  flow of a 75kw pump that was operating into a
  control valve on the discharge side that was only
  20 open.
• Obviously the pump was oversized and working
  inefficiently and was calculated that 66 of
  energy used was wasted.
• The pump was replaced with an 11kW unit at a
  capital cost of 1500.
• Energy costs were reduced from 5698 to 926 per
  year giving a payback period of approximately 4
  months.

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Case Study- Luton Borough Council

• Example of cost savings that can be achieved by
  selecting a clamp-on meter instead of a
  conventional inline meter for a Building Services
  retrofit application.
• A Borough Council now required to manage schools
  within its area was updating its plant monitoring
  in line with Part L2 of the Building Regulations.
• Heat delivered from a school central boiler house
  installation was due to be metered and quotations
  to supply and install Heat meters were requested
  from several companies offering in-line meters.
• The adoption of Clamp-On ultrasonic Heat Meters
  offered the Council the opportunity to save 40
  of the cost of a similar in-line installation.
• Reduced disruption, no draining of pipe work, no
  residual venting problems, easier maintenance,
  and no pressure drop were all additional benefits
  that could not be matched by using an in-line
  meter.

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Conclusions
There is considerable scope for an increase in
the Trend of use of Clamp-On Metering Products
within Building Services and Process Industries
including

• Chilled Water/LPHW/MTHW flow metering
• Thermal energy flow measurements when combined
  with differential temperature measurement
• System commissioning
• Temporary monitoring (Trend/Consumption logging)
• Flow confirmation
• Effluent discharge measurements
• Plant Diagnostics Leak detection

Clamp-On metering offers - Low Cost installation,
Minimum Disruption and Plant down time with Low
Life Time Costs
Thank You - Questions please