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Feature Energy Efficiency


Heading for an integrated future M


ost new buildings incorporate some form of lighting control and many go one step further by providing a centralised lighting management system. Internationally, many buildings go the next step by integrating lighting with heating/cooling and relating both ser- vices to occupancy, thus greatly enhancing energy savings.


Examples of this determined effort to conserve energy in the UK are, to date, few and far between, perhaps because most UK lighting control systems do not readily enable integration with BMS heating and ventilating systems. Delmatic systems combine the open technologies of IP, Lon and DALI for integrated, energy efficient control of lighting, HVAC and blinds - seam- lessly joining products from various manufacturers and disciplines to opti- mise building operation.


Integrated building controls enable services - lighting, air conditioning, heating, etc - to interact and respond in real time to occupants’ needs and occupancy patterns. Integrated sys- tems share key data. For example, a single sensor can relate lighting and heating/cooling to occupancy - and this pooling of information increases energy savings, enhances the effi- ciency of building services and achieves operational savings over the life of the building. In addition, inte- grated systems share hardware, net- work infrastructure and buswiring, resulting in a lower installed cost. Integrated open systems are also about choice and they liberate clients from reliance on a single vendor. Too often we hear of clients locked in to support contracts for a proprietary system which can only be maintained by the original supplier. How much better to be free to choose the support partner you want.


And what better way for a supplier to lock a client into a lifetime support contract than offer a closed system? They can get a foot in the door by sup- plying cheap initial hardware and then make their profit from year on year locked-in maintenance. Unlikely, you think - but it happened just recently on a major project in London.


Time to open up You could argue that there are many systems available which could achieve this type of integrated functionality, but the key here is the open protocol which optimises energy efficiency by allowing lighting and other building


Lighting & Lighting Controls FEBRUARY 2013


Stephen Woodnutt from Delmatic explains why integrated systems represent the best solution for energy efficiency and sustainability, and questions why the UK seems so slow in adopting an integrated approach


ing heating, ventilation and cooling, so that both lighting and air conditioning can be linked to occupation. To further optimise energy efficiency, tempera- ture bands may be related to occu- pancy with unoccupied areas operating under a wider (and higher) temperature band.


services to interact without interfaces or gateways.


There are many examples of this integrated approach in the Middle East - not a region one immediately associ- ates with energy efficiency, but one in which sustainability and open integra- tion is taken very seriously.


The Masdar Institute in Abu Dhabi is the world’s first university focused on future energy with a campus boast- ing 43,000m2 11,000ft2


Above and below: The Masdar Institute in Abu Dhabi is the world’s first university focused on future energy


of research facilities and


of laboratory space. Masdar Institute is the first phase of the low carbon Masdar City and the buildings receive power from rooftop photo- voltaics as well as remote solar energy arrays.


Sustainability is top of the agenda and the Delmatic system, which con- trols lighting across the campus, con- siders every watt of power, optimising energy efficiency to reduce the demands on sustainable energy and assist in the achievement of a carbon- free environment.


The use of open protocols enables seamless integration with other energy consuming building services includ-


The system assists in achieving a campus reduction of 50% less energy compared to business as usual practice. A Delmatic system optimises energy efficiency using the company’s Dali Zero Power system which eliminates the standby power of digital lighting (achieving reductions in overnight power consumption) and therefore achieves greater energy savings. We have seen that open, integrated systems can achieve enhanced energy efficiency and therefore provide oper- ational savings throughout the lifetime of a building - but surely integrated systems are more expensive than pro- prietary systems?


Cost


If you simply look at each system as a stand alone entity there is the appear- ance of higher cost, but an integrated solution can’t be evaluated piecemeal. In fact, when you consider the bigger picture and take account of the reduced purchase and installation costs achieved by, for example, sharing the same buswire and a common sensor, the picture is very different. To put this in perspective it’s worth considering a case study carried out by quantity surveyors Turner and Townsend and consultants BWP. They designed and costed an 11,000m2


Virtual


Headquarters building, comparing the cost of services installation using propri- etary systems with the installed cost of an open system. The study concluded that the open protocol, integrated solu- tion achieved a saving of more than four percent per square metre.


And, in these straightened times, when every penny counts more than ever, isn’t it time we worked together to design more integrated, open solu- tions which save our money and envi- ronment - both now and in the future.


Delmatic www.delmatic.com T: 0208 987 5900


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