Sabien Technology’s M2G intelligent boiler load optimisers are reducing gas consumption at the University of Central Lancashire (UCLan) by an average of 9% with payback expected in just under 1.5 years
Initially UCLan carried out a pilot of M2G during the 2010 heating season, which was one of the coldest on record. Since the pilot, M2G has been deployed in a further five buildings including installation to atmospheric, forced draught and modern modulating boilers. In each case M2G has been fully integrated with the existing building management systems (BMS).
“At first there was some confusion about whether fine-tuning the BMS would control boiler dry cycling but further investigation showed the BMS was unable to deliver what Sabien’s M2G provides,” recalled UCLan Energy Manager Ruth Taylor. “We also sought reference from another English university who were producing some very good results and paybacks using M2G,” she added.
“As part of our procurement policy we would usually ask at least three companies to tender but the fact that there are no equivalent technologies to M2G enabled us to obtain a waiver for the procurement process,” Ruth Taylor continued.
In 2008 UCLan became one of only two universities to gain the coveted Carbon Trust Standard. More recently UCLan has developed and implemented an environmental management system to ISO 14001:2004 standard. UCLan is now one of only five higher education institutions to hold both ISO 14001 and Carbon Trust Standard accreditation.
The M2G is an intelligent boiler load optimisation controller that improves the efficiency of each individual boiler by removing the inherent problem “boiler dry cycling”. Boiler dry cycling is exacerbated further from the practice of over-sizing boilers at the point of commissioning. Research shows over 80% of commercial boilers are over-sized.
M2G is retro-fitted to each boiler and monitors the temperature of the water in the flow and return every 10 seconds, enabling the M2G to analyse the temperature losses from the boiler. The M2G calculates whether the temperature loss is caused by a genuine heating demand or from standing losses i.e. temperature losses through boiler casing and flue. When the boiler tries to fire as a consequence of the standing losses the M2G will prevent the boiler from firing unnecessarily.