Using too much gas? Burner Management Units WILL help you reduce consumption.
I've been asked numerous times to post something regarding the Burner Management Units we install on boilers.
So here goes.
Over the last few years we have installed Burner Management Units (BMU) on countless boilers across the UK. We installed them in schools, hotels, heath clubs, hospitals, care homes, retail stores, the list is endless.
ALL, have made savings ranging from 11% to a very impressive 27%. Savings which are verified, using a methodology certified by the Building Research Establishment (BRE).
And the best bit? All have had a return on investment of less than 12 months!
So how does this wonder product work?
Those of you who are not engineers, chemists of physicists will probably not be aware of Newtons law of cooling. But everyone has heard of Isaac Newton. His law states (in layman terms) heat gain is twice as fast as heat loss.
Using this theory, what the BMU does is extend the cooling curve of the heating/cooling cycle of the boiler by around 100% and extends the heating (or burn) curve of the cycle by around 20%.
The net result is fewer cycles with longer burns. The analogy of a car driving fewer but longer journeys vs a car driving many short journeys is very apt. Obviously the many short journeys being the least fuel efficient.
The unit calculates the savings it is making by taking itself out of cycle every 50 cycles of the boiler and compares the consumption of that one cycle where it is effectively 'off' with the average consumption of the previous 50 cycles with it 'on'. Again this has been certified by the BRE.
The screen shot at the top is from a very well known Manchester hotel. Who have reduced their gas consumption by just under 25%.
The units can be installed on nearly all boilers (with the exception of steam boilers as there is no modulation), and unlike anti dry cycling boiler optimisation units will give you savings all year round, and will work on boilers which heat swimming pools.
We have been told on various occasions that it is "the best bit of energy saving kit we've ever installed". As recommendations go. That's pretty good.
NEED BOILER & SYSTEM OPERATIONS HELP? Improving Efficiency, Sustainability, Reliability & Safety in the Boiler plant??
7 年Full modulation on steam boilers is typical in the US with turn downs of 10:1 being very common. The essential point at the outset is to closely match the boiler’s capacity with the load and its varying conditions; applying a package with a burner capable of the proper turn down allowing it to reduce the firing rate to match the descending (steam) requirement. Keeping the boiler on line substantially reduces the costly pre and post purge losses due to the BMS’ inherent safety interlocks when the boiler cycles off line. Agree, adding parallel positioning fuel/air control and O2 trim along with a PLC based platform incorporating the BMS and Combustion Control System (CCS) further enhances the efficiency, reliability and safety of the package. Visit our website cleaverbrooks.com to view FREE public webinars covering this subject and many more!
Senior Engineering Project Manager at Tempest Engineering
8 年I've always been a fan of parallel positioning with O2 trim. Emissions compliance always kills efficiency (FGR or high excess air, notably). I've had a lot of success with certain industrial burners achieving 30 ppm NOx values with no FGR at 15% excess air with small blower power requirements to boot (I don't want to advertise burner bias so I'll keep my source a secret). It's amazing the span of technology for burner controls and the innovative ways different companies exploit said technology.
Boiler Systems Hydronics Specialist | Steam Boiler Systems | CE Provider for State of FL
8 年I can't say we've achieved the 25% (+) figures for fuel savings, but have achieved 8-10% fuel savings for modulating steam boilers by incorporating BMS with parallel positioning combustion controls and improving "turndown" on the burner (dependent on combustion air damper deisgn).
Thermal Solution Sales Engineer at Spirax Sarco, USA
8 年Thanks Mark, will talk to u soon ..
Company Director
8 年Vijay. Yes it does work on a step boiler (if I understand you correctly). And yes it works on oil fired boilers. In fact it works on all types of fuel boilers. I'd be happy to answer queries you may have.