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Precision Flow Ltd case studies
The Woolman Research
Building has a complex chilled water system and boiler. These have been heavily
modified to assist in the heating of and cooling of experiments. Butler Pipe
Fitting Services were brought in to decommission parts of the system and balance
the remaining system. Butler Pipe Fitting Services consulted Precision Flow Ltd.
Precision Flow Ltd recommended the hire of a Precision Flow 190P LT clamp on
transit time flowmeter. This
allowed Mike from Butler Pipe Fitting Services to quickly analyse the flow rates
in the system. As the 190P is non intrusive a transit time clamp on ultrasonic flow meter there was no need
to shut the system down to install ultrasonic flow meters. This allowed research work to
continue in the building. The Precision flow
clamp on ultrasonic flow meter includes an on board data
logger which was used to store flow rates over a number of weeks. As the clamp
on 190P flowmeter is
easily configured it was easily moved from pipe to pipe as a wide range of pipe
sizes were used throughout the building. Mike from Butler Pipe
Fitting Services was very impressed by the simplicity, accuracy, and ease of use
of the Precision Flow 190P LT clamp on meter. "It was so simple to use I did not need to read the manual" Butler Pipe Fitting
Services have since bought their own Precision Flow 190P. Butler Pipe Fitting
Services were bought in to decommission parts of a large heating system and
analyse and balance the remaining system. Data collected using the
Precision Flow 190P clamp on ultrasonic flow meter helped reduce energy consumption by 68%. The system was built
without the inclusion of instrumentation, the Precision Flow 190P clamp on
ultrasonic flowmeter being portable
allowed Butler Pipe Fitting Services to find out what was actually occurring in
the system pipe line rather than basing efficiency calculations on tabulated
values. The introduction of the
Climate Change Levy has meant that failure to monitor the use of energy will
result in additional costs through taxation on a company’s energy bill. The
energy used in the heating ventilation and air conditioning system forms a large
part of the energy use and expense of any facility. The data collected
with the 190P clamp on ultrasonic flowmeters internal data logger
identified that even before decommissioning parts of the system, the 40KW pumps
were too large for the flow rates required. This meant the pumps were operating
at very inefficient flow rates for their performance curves. Once the system was
reduce in size this situation was exacerbated. The pumps were removed
and replaced by smaller pumps operating on an efficient part of their
performance curves. Using a clamp on power analyser it
was shown by measuring actual pump flow performance with the precision flow
clamp on flow meter and by using this
information to optimise a system, power consumption was reduced by 68%.
Improved and new methods of producing pharmaceutical products were being researched. Difficulties were found using electromagnetic meters and turbine meters to measure flow rates of ultra pure water and de-ionised water. This was due to the lack of lubrication of the fluids, contamination due to the invasive nature of the meters and lack of conductivity of the de-ionised water. A research scientist
approached Precision Flow Ltd. After discussing his application with our
engineer Precision flow recommended
the Precision Flow 190P non invasive clamp on transit time ultrasonic flowmeter. This was the ideal flow meter for his research work. The
Precision Flow 190P uses clamp on ultrasonic transducers that clamp to the outside of the
pipe removing the possibility of contamination and easing cleaning of the system.
Also the Precision Flow 190P clamp on meter works with fluids that have no conductivity. Being a portable unit he
could move the meter around his system with out having to purchase multiple meters.
Background: Pre-Packaged salads and
fruit are triple-washed, first in a light chlorine bath to kill naturally
occurring bacteria, and then twice more in chilled water. The produce is then
dried and packaged. Organic growers often package on the farm. Water usage
around the plant and on the farm has become an important and expensive issue. Water and electricity
consumption in the plant had increased although the tonnage of vegetables being
washed had reduced. Milan surveyed the plant
using a Precision Flow 190P clamp on ultrasonic flow meter monitoring water feed flow into the machines in the plant
and comparing them with the expected water usage. After 8 measurements and only
60 minutes work he had identified the high water usage machine as the carrot
washing machine. The
problem carrot washing machine: Carrots are put into a feed hopper which feeds them at a constant speed into the washing line. The carrots go up a conveyor into the pre-washer drum, where water is pumped over them as the drum rotates. This removes most of the soil from the carrots. The water used in this part of the washing process is recycled through a filter system then reused. The carrots then go from
the pre-wash drum to the stone extractor where they pass over a trough of fast
flowing water, and the stones being heavier than the carrots sink to the bottom
where they are removed. By attaching the Precision Flow 190P clamp on flow meter to the feed pipes of the various sections of the machine he identified a defective flow diverter valve and cut off switch which allowed a pressure booster pump to be on continuously causing clean water to be wasted. Both of these problems would have taken many hours to diagnose without the Precision Flow 190P clamp on ultrasonic flow meter.
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