[ Spotlight: BMS ]
that it will not deliver the intended energy, CO2 savings.’
Over and above
BS EN 15232 gives examples of how to ensure a BEMS works in the most energy effi cient manner, grading systems from D to A, with A being the best. This should be used as a guide when specifying or installing systems, but it is always worth considering how additional technology can be used to make further savings.
The installation of variable speed drives (VSDs) offers superior control over the speed of motors driving pumps and fans. This ensures that the BMS achieves maximum control over the building’s environment, matching the temperature and humidity to the demands of the weather and the number of occupants. A VSD enables a fan to operate at the exact speed needed to maintain the building’s internal conditions, making the most of the capabilities of the BMS’s software and sensors. Impressive savings can also be made on installation
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costs by using innovative sensor technology. Sontay’s Andy Westmorland explains: ‘In some situations, it is advisable to install wireless sensors rather than traditional wired devices. Eliminating the need for wiring can cut the time and cost of sensor installation by as much as 30 per cent on some projects.’
On the look-out When it comes to energy, the old adage ‘you can’t manage what you can’t monitor’ has particular resonance. Therefore,
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The desire for energy
management is often the primary driver for having these types of systems in place
being able to extrapolate and analyse energy use data allows a building’s inhabitants to better understand, reconfi gure and improve their site's energy usage and costs, by having information presented in an organised and informative way. ‘Customers are demanding richer analytics to understand where energy is being used and when it is being wasted,’ comments David Compton of Ex-Or. ‘This data can be used to assist planning of further energy management and reduction, and also to identify system or programming faults.’ Monitoring tools are available that come in the form of a graphical, real-time user interface. This technology uses a standard internet browser and allows users to access and understand a building’s energy usage information without the need for additional proprietary software.
Think about the future Most electrical contractors will already be familiar with the components that comprise BMS and BEMS, and this sector is one of the few that is set to grow over the next few years. Pike Research, an analyst of global clean technology markets, predicts that worldwide revenue from BEMS will increase at a compound annual growth rate (CAGR) of nearly 14 per cent through the rest of this decade, reaching just under $6bn a year by 2020. In these recessionary times, it makes clear sense to become familiar with the installation and maintenance of this technology. Society is only going to become more energy effi cient over the coming years and this will, in turn, offer electrical contractors a way to grow their businesses, promote employment and enhance their skills.
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KNX sensors and devices for all locations
Offices Conference rooms Corridors Schools Stairwells Warehouses
RC-plus next
PD2
PD4
Actuator
info@beguk.co.uk
Touch-Panel
Power supply
www.beg-luxomat.com July 2012 ECA Today 33
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