Case Study: i2O Water Trials Success

Client: Severn Trent Water
Client Contact: Julie Hart
Date of Project: November 2012 - November 2013
Partners on Project: i2O Water, Inverter Drive Systems

The Site: Hady DSR is located in Chesterfield, Derbyshire. The site was chosen to be the first Severn Trent site for trialling the new i2O Water Pump Controller. Present on site in addition to the reservoir are various pumps and valves.

Process Issues: Many water companies are faced with the problems of fresh water pipework bursts when supplying their customers. The i2O Water concept would reduce and all but eliminate pipework bursts for water supply to the DMA and also save energy as pumps would not be required to achieve the existing higher-pressure setpoints.

Preliminary Works: Stirling took receipt of the i2O Water Controller, and produced an enclosure complete with mains isolation, surge protection, 24VDC with fusing, analogue conditioning and marshalling section. We also provided front door operator controls so that local technicians could see the status of the system and also swap over to legacy control if anything undesired were to occur during the trial period. The client was also given the ability to monitor and inhibit this system remotely via Telemetry control.

A formal Factory Acceptance Test was carried out on the system within our facilities, and we were joined by 4 members from Severn Trent to verify the system functionality. Hady supplies fresh water to many hundreds of homes and also to Chesterfield Royal Hospital so we went to great lengths to accept zero errors in design.

Final Solution: Stirling were present on site for 2 weeks, providing new cable tray installing, system installation and integration. We provided valuable energy monitoring of the pumps to Telemetry with assistance from Inverter Drive Systems (IDS) Ltd. Over a period of 8 weeks the pressure was gradually reduced in the pipeline, first down onto the calculated pressure curve, and then a smooth transition - reducing the pressure on the existing pipelines by a third. Savings calculations were initially looking like >£5,000 a year so we were really pleased with the outcome.

The graph below was taken from i2O Water's online monitoring suite, and shows the pressure transducer value as recorded by their controller during the process of reducing the pumped pressure each week.