Water pressure management project saves Severn Trent 5 Ml/d

HWM’s Pegasus+ pressure controller replaced DMA and flow loggers

HWM has helped Severn Trent (ST) make significant water savings through a pressure management programme. Since April 2015, ST has installed 200 of HWM’s Pegasus+ pressure controllers, saving 5 Ml/d in the process.

HWM's Pegasus+ pressure controllers have helped Severn Trent save 5 Ml/d

“The Pegasus+ has proven to be excellent value for money and it’s given us a calmer network,” said Graham Hollier, network pressure advisor at ST.

ST’s network already contained thousands of HWM critical point (CP) and flow loggers. Linking Pegasus+ with its existing CP loggers allowed ST to operate the pressure controller in a learning mode. The data gathered automatically updated the product’s online software, giving the water company a more optimised network than if the data had been entered manually on-site.

“It’s a really good, simple system,” explained Graham, “that allows us to see the data remotely, make adjustments and have good visibility as to where all the pressure controllers are in the system, which the guys here like using and which we’ve made considerable use of.”

Since Pegasus+ allowed for detailed multi-point pressure relief valve (PRV) control without a flow logger, the water company was also able to save money by replacing some of its district metered area and flow loggers, which were often located next to PRVs.

ST considered several potential suppliers for the project and tested each pressure controller on its network calming rig in Warwick.

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Affinity Water changing the economics of leak detection with PermaNet+

HWM chosen as partner in move towards permanent monitoring to reduce leakage

Affinity Water, Britain’s largest water-only utility serving 3.6 million people in south-east England, has partnered with HWM to target significant reduction in leakage rates using PermaNET+ fixed network telemetry.

Affinity Water has partnered with HWM to target significant reduction in leakage rates using PermaNET+ fixed network telemetry

“Using the HWM PermaNET+ solution, we can continuously monitor 25 per cent of our network, identifying leaks in a matter of hours, rather than the days it takes using conventional techniques and technologies,” said Drew Ritchie, managing director of wholesale operations at Affinity Water.

Affinity already uses HWM datalogging technology to monitor its network’s performance, but the addition of PermaNET+ will significantly enhance leak detection across the network.

PermaNET+ represents the next stage in the development of noise logging. Data generated by the noise logger is automatically sent to the user, removing the need to visit sites to carry out data collection. Data transmission is achieved through a combination of GPRS cellular communication or SMS. The unit also sends an audio file for remote monitoring and correlation to localise the leak position. PermaNET+ is located entirely below ground, making it less intrusive and more practical for large-scale deployment.

These features are critical to the long-term leakage reduction plan of Affinity Water, which has set ambitious targets for improvement of its network. “Of all the UK water companies, at Affinity Water we’ve set ourselves the largest percentage leakage reduction over the current five-year [AMP6] planning period,” explained Drew. “We’re achieving this with HWM’s PermaNET+, challenging industry thinking and methodologies to change the economics of finding leaks.”

By permanently monitoring water network infrastructure without extensive site visits, PermaNET+ identifies leaks more quickly than traditional methods and allows for rapid deployment to fix any leaks that do occur. This significantly reduces both water loss and the cost of identifying leaks within a water network.

The programme will be completed in May 2017, with the installation of 20,000 PermaNET+ systems. This represents a long-term commitment to improved leakage reduction from Affinity Water, as Drew explained: “We’re looking forward to working with HWM over the next 10 years to enhance the system and use leakage information in new and innovative ways. Our customers deserve the best. Together, we will meet the challenges defined in our business plan.”

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Water Pressure Transient Loggers solve burst mystery in County Kilkenny

PTLs identify pressure reducing valve as the culprit

Pressure Transient Loggers (PTLs) from multi-utility monitoring and telemetry specialist HWM have solved the problem of repeated water main bursts in County Kilkenny, Ireland.

Pressure Transient Loggers from HWM have solved the problem of repeated water main bursts in County Kilkenny

EMR Integrated Solutions and Kilkenny County Council (KCC) set up a pilot scheme to investigate the advantages of deploying PTLs on water distribution networks on a permanent basis. EMR and KCC installed two HWM PTLs on the network in South Kilkenny, at Owning and Piltown.

The selected section of the network had been prone to occasional bursts. The traditional course of action was to repair the pipeline until funding was made available to replace the pipeline completely.

Both PTLs were located upstream of a pressure reducing valve (PRV) and connected to hydrants for the duration of the pilot. The PTLs were totally enclosed in the hydrant chambers, communicating via GPRS. Agnostic SIMs allowed for automatic best-network selection for data transmission. HWM’s free programming software enabled engineers to carry out a GPRS test directly from the logger in the chamber.

Following a burst, EMR retrieved data from the nearest PTL, three kilometres from the burst location. Analysis of the data showed two transient notifications occurring on a daily basis at 5:04 and 23:10. There were also multiple transient notifications that coincided with the burst on the pipeline.

After the burst repair was carried out, EMR installed a second PTL closer to the burst location. The two transient notifications still occurred on a daily basis at the same times, while the pressure transient events were dramatically larger than the original transient recording.

EMR investigated further with council staff and discovered that the local PRV, which was installed to conserve water, was actually causing the pressure transients. The PRV had a day / night controller set to operate daily at 5:00 and 23:00.

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New telemetry data logger improves asset visibility and reduces totex

HWM has upgraded the industry-leading MultiLog LX with innovative added features, improving its capability.

The MultiLog LX-2 data logger improves asset visibility and reduces totex

The new MultiLog LX-2 is an advanced, low-power telemetry data logger designed with long asset life and harsh environments in mind. The data logger can be programmed, and its firmware safely and reliably upgraded, remotely. Removing the need for expensive and time-consuming site visits helps to reduce the unit’s totex and carbon footprint.

Enhanced features, including fast logging to 25 Hz and accelerated logging during target windows, give increased asset visibility when monitoring potentially-critical events such as network bursts, improving network conditions and customer satisfaction.

New features include optional 3G network support, multiple sensor support, improved secondary fast data (25 Hz) and accelerated dial-in during alarm events.

In addition to digital flow and pressure, the types of sensor supported now include status, LNS (acoustic) and SonicSens (ultrasonic level), as well as industry-standard SDI12, Modbus and analogue (0-1V, 0-10V & 4-20mA).

The unit’s secondary channel enables enhanced investigation of events such as transient pressure spikes and provides a more accurate reading of minimum night flow. The logger can be configured to automatically accelerate its scheduled transmission logging rate to improve asset visibility during critical alarm events.

As with all HWM data loggers, remote telemetry, asset management, configuration, third-party integration and export are handled seamlessly via the company’s DataGate cloud server, allowing data to be accessed at all times from any location.

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HWM to supply Severn Trent with wastewater monitoring systems

Project thought to be largest of its kind anywhere in the world

HWM, in partnership with field services expert Enviromontel, has won a contract to supply, install and maintain fixed-point sewer network monitoring equipment for Severn Trent (ST).

HWM has won a contract to supply, install and maintain fixed-point sewer network monitoring equipment for Severn Trent

In what is thought to be the largest project of its kind, ST is targeting better monitoring of its wastewater networks in order to improve performance and customer service, as well as reduce flooding and pollution incidents.

Following a rigorous evaluation process, ST decided that HWM offered the greatest overall value and was best able to help ST achieve its strategic objectives. HWM is due to provide three separate products over a five-year period, all based on the company’s new Intelligens data logger:

  • 700 Intelligens Flow monitoring systems, capable of recording parameters such as velocity and depth.
  • 3,000 Intelligens WW and SonicSens ultrasonic sensors, used to record the level of flow.
  • 1,130 Intelligens Flood Alarm systems, which register that the level in the sewer has risen beyond an acceptable height and transmit an alarm.

The intrinsically-safe (ATEX Zone 0) Intelligens is housed in a rugged IP68 enclosure and fitted with a GPRS modem for remote monitoring and reprogramming. The unit’s advanced power management allows for over five years’ data collection and transmission under standard operating conditions. An alarm regime can be configured for each channel and threshold conditions set to trigger faster logging and accelerated data transmission during alarm conditions.

The data logger and associated interfaces are compatible with a variety of sensors including Doppler-effect velocity, hydrostatic depth, ultrasonic level, radar level and digital inputs from rain gauges or float alarms. This allows HMW to offer complete monitoring systems suitable for permanent or temporary flow surveys, level monitoring or flood level alarm. Typical applications for the equipment include foul, combined and storm water sewers, as well as adopted private sewer monitoring, but it can also be used for open channel or outflow monitoring.

The benefits of long-term monitoring in wastewater networks include a reduction in both the frequency and impact of pollution events. Permanent installation of remote monitoring equipment helps to alert network operators to immediate problem sites. It also improves understanding of network performance and delivers data to assist with the development and testing of advanced network models.

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HWM’s pressure controller helps Bournemouth Water reduce leakage and bursts

The Pegasus+ pressure control system from HWM has helped Bournemouth Water (BW) reduce leakage by 1 Ml/d and achieve short-duration burst reductions of 54 per cent.

HWM's pressure controller has helped Bournemouth Water reduce leakage by 1 Ml/d and achieve short-duration burst reductions of 54 per cent

The pressure controller is responding directly to data recorded by HWM loggers at critical points (CPs) in the network and adjusting the delivery pressure. Phase one of the project has been completed, resulting in 17 new Pegasus+ installations. Phase two, currently undergoing commissioning and delivering predicted savings, will see another 62 units installed.

There were several reasons why BW chose HWM as the supplier for the project:

• CP modulation – Pegasus+’s ability to control the delivery pressure of the pressure management valve, based upon always achieving 20m at the CP within the district metered area (DMA).
• Time control – Tables built within the controller allow for specific time intervals during a day, week, month or year to control pressure at specific settings. For example, at peak demand, opening the valve slightly more than during low demand, when the valve could be throttled down.
• Supplier confidence – BW has a long history of working with HWM and was reassured by the available support and product quality. BW knows that, if problems arise, HWM will be on hand to provide the necessary support to resolve the issue.
• Value for money – HWM supplies a product capable of achieving the required level of control to help with good pressure management. Pegasus+ offers the same level of advanced technology as more expensive rivals.

Having traditionally adopted pressure management measures only in areas with existing high pressure, BW decided to use pressure management to reduce leakage across parts of its distribution network.

BW’s models showed that extensive pressure management could take place at DMA level and predicted potential savings and benefits that included: leakage reduction; overall volume savings leading to reduced production costs; reduced short-duration bursts; and extended asset life for the ageing network.

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HWM wins Manufacturing Excellence Award

Company achieves right-first-time rates above 98 per cent

Following significant improvements to several areas of its manufacturing process, multi-utility monitoring and telemetry specialist HWM has won a coveted award from parent company Halma. In Halma’s words, the Manufacturing Excellence Award for 2016 “recognises companies where major changes in manufacturing have resulted in sustainable, improved business performance.”

Halma Chairman Paul Walker presents the Manufacturing Award 2016 to HWM MD Rob Fish

Beating off competition from more than 40 other subsidiaries, HWM took the award thanks to right-first-time pass rates above 98 per cent and on-time deliveries over 95 per cent. The company has standardised product design platforms to reduce work in progress and increase throughput. It has improved its design process, developing novel design validation tests and online test and calibration systems. Achieving ATEX certification has allowed HWM to move into two new markets.

Operations Director Mick Bolton explained: “The whole operation is engaged with continuous improvement – it is now embedded in our daily routine.”

In a separate development, HWM has also received the Halma Innovation Award for 2016 for the PermaNet+ remote leak noise monitoring system. A vote among more than 200 of Halma’s senior executives returned HWM as the winner.

PermaNet+ senses vibration in water distribution networks caused by leaky pipes. The system analyses the acoustic wave signature form produced by the leak sound, decides whether a leak is present and reports the status to a remote user over the GSM network. The remote user can ask for the leak sound file to be transmitted over the network. By listening to and correlating the leak sound a remote expert can conclude whether there is a leak present, exclude the potential for false positives and prioritise field resources.

If two or more PermaNET+ sensors are in leak mode the remote user can request noise waveforms from both sensors and perform remote correlation to conclude that there is a leak and to pinpoint the leak between the two sensor locations.

PermaNet+ is the only system to provide this capability via entirely below-ground architecture, offering customers asset security and the ability to move assets easily.

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HWM unveils new corporate identity

Evolution into multi-utility company prompts rebrand

HWM has unveiled a new corporate identity to reflect its evolution into a multi-utility monitoring and telemetry company.

HWM’s new website streamlines the company’s product range into five groups: water networks, wastewater, gas networks, AMR and facilities

HWM’s primary focus for more than 30 years has been clean water and network distribution system monitoring. But in recent years the company has expanded into new sectors such as gas, water and electricity meter consumption; gas network monitoring; and sewer, river and flood monitoring.

Explaining the reasons behind the company rebrand, Director of Sales and Business Development Mike Tennant said: “The rebrand gives a clear identity to each of our business sectors and is designed to make it easier for multi-industry customers to find solutions for their applications.”

HWM’s new website streamlines the company’s product range into five groups: water networks, wastewater, gas networks, AMR and facilities. The website can be found at www.hwmglobal.com.

HWM’s customers include major UK utility providers and facilities managers. The company is a framework supplier for most UK water companies and many commercial organisations.

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Permanent water leak detection installation saves millions of krone in Copenhagen

HWM’s PermaNet allows HOFOR & Leif Koch to carry out five-year study

Danish water leak detection specialist Leif Koch A/S has used HWM’s PermaNet to save millions of krone for Denmark’s largest utility company HOFOR.

Denmark’s largest utility company HOFOR has saved millions of krone with HWM's Permanet water leak detection system

PermaNet allowed Leif Koch A/S, for the first time, to install 185 data loggers in Copenhagen on a permanent basis over a five-year period. The permanent installation enabled the company to quickly find out when and where a leak had occurred. Previously, the firm had used a lift-and-shift method and changed the location every 48 hours.

On just the second day of the project, the leak detection team identified a leak. Instead of tackling it, they decided to leave it and see how many days would elapse before the water reached the surface. After 10 days in which nothing happened, the team dug down to the leak and discovered that the water was running directly into the sewer.

“If we had conducted a study of this particular area using our old method a week before the leak began,” explained Kim Roar, team leader at HOFOR, “it would have been three years before we returned to this area and discovered the leak. In other words, the leak would have been continuously running into the sewer for three years. By our rough calculations, this leak alone would have cost us 1.2m krone [£116K].”

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Intrinsically-safe wastewater data logger offers GPRS telemetry

Unit can be combined with ultrasonic level, pressure / depth or temperature sensors

HWM has developed an intrinsically-safe data logger for wastewater applications. When combined with the SonicSens 2 level sensor or third-party sensors, the new Intelligens WW can be used to monitor open channels, combined sewer overflows, storm drains, storage tank levels and flood warning alarm sensors.

Intelligens WW is an intrinsically-safe data logger for wastewater applications

The standard Intelligens WW system comprises one or two ultrasonic level sensors with an ATEX Zone 0-certified data logger. The unit’s multi-input functionality means it can also be used in combination with digital pressure or depth sensors, as well as simple level or temperature sensors. Data and alarms are transmitted via GPRS, with an option for SMS backup. A 3G modem variant is also available.

Ultrasonic measurement is non-contact and low maintenance. This quality, allied to robust construction and long battery life, makes the Intelligens WW suitable for ‘fit and forget’ operations in remote or hard-to-access locations.

Two-way connectivity allows the data logger to be remotely reprogrammed, avoiding the need for unscheduled and expensive site visits. Should a new alarm condition arise, the logger triggers an alert which can be sent to multiple recipients. When an alarm event occurs the unit’s accelerated sampling frequency and data transmission options allow the user to monitor and respond to changing conditions with much greater confidence.

The unit’s low-power electronics ensure that the five-year battery life is maintained even after increased transmission rates during alarm conditions are factored in. The internal battery can be supplemented with solar power or external battery packs.

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