M2G delivers energy savings for NHS Ayrshire & Arran

As part of its on-going programme to reduce energy consumption and carbon emissions, NHS Ayrshire & Arran installed Sabien Technology’s M2G boiler load optimisation controls to increase the energy efficiency of the existing boiler plant and reduced energy costs at Biggart Hospital in Prestwick. The 166-bed day hospital provides facilities to care for patients after discharge from acute care or directly from the community setting.

An initial measurement and verification project was initiated for 3 months to 5 boilers. The project ran from 20th of December 2013 to 20th March 2014 and the energy savings were measured and validated in line with the principles of the *International Performance Measurement & Verification Protocol (IPMVP). This included the use of Degree Day data to normalise fuel consumption in relation to variation in ambient temperatures. In additional to the M2Gs being installed Sabien installed independent GSM monitoring equipment to collate the data and analyse the energy savings. During the 3 month winter period average energy savings of 9% with a payback period of 1.3 years and a reduction in CO2 emissions of 53 tonnes per annum were achieved. As a result of the M&V project the M2G technology has now been rolled out to other hospitals and healthcare centres across the NHS Ayrshire & Arran estate.

Cost savings have increased to 12%

Energy Manager for NHS Ayrshire & Arran, Alastair Kay recalled: “We are committed to improving our energy efficiency and reducing our carbon footprint. To that end we continually look and evaluate technology for saving energy, specifically those which will deliver best value. Since the initial M&V project we have continued to analyse the performance and the cost savings have increased to 12%. This is because dry cycling would have increased during the milder periods of the heating season, which M2G is now preventing. The project paid back in just 6 months. Furthermore the delivery of the project has been seamless with minimal impact on our resources.”

The initial pilot project involved installation of M2G on three Hamworthy Wimborne boilers in - main boiler room and another two Remeha Quinta boilers in the plant room serving the Urquhart Ward. Controls already in place, included links to a building management system, so it was critical that the M2G units worked in parallel with the existing control strategies to achieve the additional savings.