Pulsar Process Measurement Ltd

Non-contacting Ultrasonic Pumping Station Flow Measurement Saves Money for Dwr Cymru Welsh Water

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Courtesy of Pulsar Process Measurement Ltd

Dwr Cymru Welsh Water has benefitted from the unique 'Pumped Volume' feature built into Pulsar's Quantum 2 Pump Station Controller; identifying a flow problem within a pumping station network without the need for expensive Magflow meters. Once the issue was resolved, pumped volume through one of the stations was reduced by 88% , with substantial associated energy saving.

Equipment used:

Pulsar's Quantum 2 is designed as a complete system for a sewage pumping station (SPS), providing sophisticated control for a majority of pumping station applications. One of the advanced features introduced with Quantum 2 is the ability to measure pumped volume of liquid passing through the station. Taking into consideration the rate of inflow and the rate of outflow through the station, and calibrated to the size and shape and therefore the volume of the well, the Quantum provides an excellent 'live' indication of pumped volume, allowing the gathering of flow data and monitoring of flow networks. This function comes with no additional cost, and provides data comparable with a Magflow meter installation.

Welsh Water installed three Quantum 2 units on Anglesey, to provide continuous flow data for the Llandeusant WWTW catchment, fed by Henbont, Glad Alaw and Bronallt SPS's. In common with most other water companies, Welsh Water is under pressure from agencies like the EA to provide more and more flow data across their networks to allow realistic forward planning for future developments and maximise the potential of existing networks. The Quantum units were fitted with optional logging cards and provided real-time flow data to telemetry, and a discrepancy between the stations was immediately apparent. Once the data was analysed, it was clear that one of the three SPS's was pumping nearly three times more sewage than the other two combined, despite serving the fewest premises. On investigation, a fault within a non-return valve (NRV) was identified, leading to the SPS re-pumping sewage. The NRV was repaired, and pumped volume immediately reduced close to the expected levels. Because of the relatively low cost of the equipment and installation, the pay-back period on the Quantum unit was very short, estimated at only 75 days.

Quantum 2 also won the Institute of Water's Welsh Area Innovation of the Year Award for 2011.

The Quantum 2 unit includes other advanced features such as TariffGuard, which automatically minimises pumping during periods of high electricity costs. Quantum also provides automatic reset for tripped pumps, potentially saving many man hours attending sites, and alarms on 'time to spill', very important in critical sites.

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