Sustainability


Sabien Technology’s M2G intelligent boiler load optimisers have been shown to deliver energy savings at numerous UK installations


measures and analyses the temperature profile of each boiler in real time. This enables the con- troller to identify and prevent the boiler from dry cycling and, more importantly, allow the boiler to fire immediately if there is a genuine demand for heat. If a BMS is in place, the controller integrates with it, taking its signal from the BMS. Just as importantly, it recalcu- lates the values every time the boiler reaches its required set point temperature. This means it adapts to BMS/optimiser variable set-points and does nothing to conflict with other existing controls such as weather compen- sation, demand control or sequencing. The boilers’ designed set points and the system temper- ature (common header tempera- tures) are never altered.


Crucially, such units require no


A modern boiler optimisation control strategy constantly measures and analyses the temperature profile of each boiler


maintenance or seasonal calibration and can be easily moved to new boilers if existing plant is replaced. The exact savings that can be


achieved by tackling boiler dry cycling vary from one project to another but, as an example, instal- lation of 111 M2G intelligent boil- er load optimisers at HMS Sultan was shown to deliver a 12 per cent energy saving (based on CUSUM analysis), with a return on invest- ment within 1.4 years. Similarly, Lincolnshire County Council reduced its gas consumption by 15 per cent across 23 properties by retrofitting M2G and is now installing M2G to over 1,200 boil- ers within its school estate.


Validating savings


Whatever the nature of the ener- gy-saving project, it is important that any savings can be verified using a validation methodology that is clearly understood by all parties. A useful and international- ly recognised approach to such


validation is the International Performance Measurement and Verification Protocol (IPMVP). The IPMVP defines a best practice framework for quantifying the results and benefits of energy efficiency investments. It also ensures there is total clarity and transparency for all parties in relation to the scope of work from initial planning, the measurement methodology, through to the validation of results.


The underlying point of this article is that when you think all bases are covered, they may not be. So rather than assuming all is under control, take a closer look to ensure you have a full understand of what is happening.


// The author is the business development director with Sabien Technology //


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HVR | March 2014 | 37


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